ownership and relinquish

Change-Id: I625bd61adfac11febdb25b179efbc6134a276f12
Issue-ID: MUSIC-219
Signed-off-by: Enrique Saurez <enrique.saurez@gmail.com>

21 files changed, 3076 insertions, 2207 deletions

diff --git a/.gitignore b/.gitignore
index ff3bfdd..618a71f 100755
--- a/.gitignore
+++ b/.gitignore
@@ -1,7 +1,8 @@
 .idea
 target
-mdbc.iml
+*.iml
 .project
 .settings
 .classpath
 .checkstyle
+catalina*
diff --git a/mdbc-server/src/main/java/org/onap/music/mdbc/DatabasePartition.java b/mdbc-server/src/main/java/org/onap/music/mdbc/DatabasePartition.java
index 2ca621a..ea76598 100755
--- a/mdbc-server/src/main/java/org/onap/music/mdbc/DatabasePartition.java
+++ b/mdbc-server/src/main/java/org/onap/music/mdbc/DatabasePartition.java
@@ -7,9 +7,9 @@
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
- * 
+ *
  *      http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -27,7 +27,6 @@ import java.util.*;
 import org.onap.music.logging.EELFLoggerDelegate;
 import com.google.gson.Gson;
 import com.google.gson.GsonBuilder;
-import org.onap.music.mdbc.tables.MriReference;
 
 /**
  * A database range contain information about what ranges should be hosted in the current MDBC instance
@@ -35,115 +34,164 @@ import org.onap.music.mdbc.tables.MriReference;
  * @author Enrique Saurez 
  */
 public class DatabasePartition {
-	private transient static EELFLoggerDelegate logger = EELFLoggerDelegate.getLogger(DatabasePartition.class);
-
-	private UUID musicRangeInformationIndex;//Index that can be obtained either from
-	private String lockId;
-	protected List<Range> ranges;
-
-	/**
-	 * Each range represents a partition of the database, a database partition is a union of this partitions. 
-	 * The only requirement is that the ranges are not overlapping.
-	 */
-	
-	public DatabasePartition(UUID mriIndex) {
-		this(new ArrayList<Range>(), mriIndex,"");
-	}
-	
-	public DatabasePartition(List<Range> knownRanges, UUID mriIndex, String lockId) {
-		ranges = knownRanges;
-		
-		if(mriIndex != null) {
-			this.setMusicRangeInformationIndex(mriIndex);
-		}
-		else {
-			this.setMusicRangeInformationIndex(null);
-		}
-		this.setLockId(lockId);
-		
-	}
-
-	public UUID getMusicRangeInformationIndex() {
-		return musicRangeInformationIndex;
-	}
-
-	public void setMusicRangeInformationIndex(UUID musicRangeInformationIndex) {
-		this.musicRangeInformationIndex = musicRangeInformationIndex;
-	}
-
-	/**
-	 * Add a new range to the ones own by the local MDBC 
-	 * @param newRange range that is being added
-	 * @throws IllegalArgumentException 
-	 */
-	public synchronized void addNewRange(Range newRange) {
-		//Check overlap
-		for(Range r : ranges) {
-			if(r.overlaps(newRange)) {
-				throw new IllegalArgumentException("Range is already contain by a previous range");
-			}
-		}
-		ranges.add(newRange);
-	}
-	
-	/**
-	 * Delete a range that is being modified
-	 * @param rangeToDel limits of the range
-	 */
-	public synchronized void deleteRange(Range rangeToDel) {
-		if(!ranges.contains(rangeToDel)) {
-			logger.error(EELFLoggerDelegate.errorLogger,"Range doesn't exist");
-			throw new IllegalArgumentException("Invalid table"); 
-		}
-		ranges.remove(rangeToDel);
-	}
-	
-	/**
-	 * Get all the ranges that are currently owned
-	 * @return ranges
-	 */
-	public synchronized Range[] getSnapshot() {
-		return (Range[]) ranges.toArray();
-	}
-	
-	/**
-	 * Serialize the ranges
-	 * @return serialized ranges
-	 */
+    private transient static EELFLoggerDelegate logger = EELFLoggerDelegate.getLogger(DatabasePartition.class);
+
+    private UUID musicRangeInformationIndex;//Index that can be obtained either from
+    private String lockId;
+    protected List<Range> ranges;
+
+    private boolean ready;
+
+    /**
+     * Each range represents a partition of the database, a database partition is a union of this partitions.
+     * The only requirement is that the ranges are not overlapping.
+     */
+
+    public DatabasePartition() {
+        this(new ArrayList<Range>(),null,"");
+    }
+
+    public DatabasePartition(UUID mriIndex) {
+        this(new ArrayList<Range>(), mriIndex,"");
+    }
+
+    public DatabasePartition(List<Range> knownRanges, UUID mriIndex, String lockId) {
+        if(mriIndex==null){
+            ready = false;
+        }
+        else{
+            ready = true;
+        }
+        ranges = knownRanges;
+
+        this.setMusicRangeInformationIndex(mriIndex);
+        this.setLockId(lockId);
+    }
+
+    /**
+     * This function is used to change the contents of this, with the contents of a different object
+     * @param otherPartition partition that is used to substitute the local contents
+     */
+    public void updateDatabasePartition(DatabasePartition otherPartition){
+        musicRangeInformationIndex = otherPartition.musicRangeInformationIndex;//Index that can be obtained either from
+        lockId = otherPartition.lockId;
+        ranges = otherPartition.ranges;
+        ready = otherPartition.ready;
+    }
+
+    public String toString(){
+       StringBuilder builder = new StringBuilder().append("Row: ["+musicRangeInformationIndex.toString()+"], lockId: ["+lockId +"], ranges: [");
+       for(Range r: ranges){
+           builder.append(r.toString()).append(",");
+       }
+       builder.append("]");
+       return builder.toString();
+    }
+
+
+    public boolean isLocked(){return lockId != null && !lockId.isEmpty(); }
+
+    public boolean isReady() {
+        return ready;
+    }
+
+    public void setReady(boolean ready) {
+        this.ready = ready;
+    }
+
+    public UUID getMusicRangeInformationIndex() {
+        return musicRangeInformationIndex;
+    }
+
+    public void setMusicRangeInformationIndex(UUID musicRangeInformationIndex) {
+        this.musicRangeInformationIndex = musicRangeInformationIndex;
+    }
+
+    /**
+     * Add a new range to the ones own by the local MDBC
+     * @param newRange range that is being added
+     * @throws IllegalArgumentException
+     */
+    public synchronized void addNewRange(Range newRange) {
+        //Check overlap
+        for(Range r : ranges) {
+            if(r.overlaps(newRange)) {
+                throw new IllegalArgumentException("Range is already contain by a previous range");
+            }
+        }
+        ranges.add(newRange);
+    }
+
+    /**
+     * Delete a range that is being modified
+     * @param rangeToDel limits of the range
+     */
+    public synchronized void deleteRange(Range rangeToDel) {
+        if(!ranges.contains(rangeToDel)) {
+            logger.error(EELFLoggerDelegate.errorLogger,"Range doesn't exist");
+            throw new IllegalArgumentException("Invalid table");
+        }
+        ranges.remove(rangeToDel);
+    }
+
+    /**
+     * Get all the ranges that are currently owned
+     * @return ranges
+     */
+    public synchronized List<Range> getSnapshot() {
+        List<Range> newRange = new ArrayList<>();
+        for(Range r : ranges){
+           newRange.add(r.clone());
+        }
+        return newRange;
+    }
+
+    /**
+     * Serialize the ranges
+     * @return serialized ranges
+     */
     public String toJson() {
-    	GsonBuilder builder = new GsonBuilder();
-    	builder.setPrettyPrinting().serializeNulls();;
+        GsonBuilder builder = new GsonBuilder();
+        builder.setPrettyPrinting().serializeNulls();;
         Gson gson = builder.create();
-        return gson.toJson(this);	
+        return gson.toJson(this);
     }
-    
+
     /**
      * Function to obtain the configuration 
      * @param filepath path to the database range
      * @return a new object of type DatabaseRange
      * @throws FileNotFoundException
      */
-    
+
     public static DatabasePartition readJsonFromFile( String filepath) throws FileNotFoundException {
-    	 BufferedReader br;
-		try {
-			br = new BufferedReader(  
-			         new FileReader(filepath));
-		} catch (FileNotFoundException e) {
-			logger.error(EELFLoggerDelegate.errorLogger,"File was not found when reading json"+e);
-			throw e;
-		}
-    	Gson gson = new Gson();
-    	DatabasePartition range = gson.fromJson(br, DatabasePartition.class);	
-    	return range;
-    }
-
-	public String getLockId() {
-		return lockId;
-	}
-
-	public void setLockId(String lockId) {
-		this.lockId = lockId;
-	}
+        BufferedReader br;
+        try {
+            br = new BufferedReader(
+                new FileReader(filepath));
+        } catch (FileNotFoundException e) {
+            logger.error(EELFLoggerDelegate.errorLogger,"File was not found when reading json"+e);
+            throw e;
+        }
+        Gson gson = new Gson();
+        DatabasePartition range = gson.fromJson(br, DatabasePartition.class);
+        return range;
+    }
+
+    public String getLockId() {
+        return lockId;
+    }
 
+    public void setLockId(String lockId) {
+        this.lockId = lockId;
+    }
+
+    public boolean isContained(Range range){
+        for(Range r: ranges){
+           if(r.overlaps(range)){
+               return true;
+           }
+        }
+        return false;
+    }
 }
diff --git a/mdbc-server/src/main/java/org/onap/music/mdbc/MDBCUtils.java b/mdbc-server/src/main/java/org/onap/music/mdbc/MDBCUtils.java
index 2723490..3f45d98 100755
--- a/mdbc-server/src/main/java/org/onap/music/mdbc/MDBCUtils.java
+++ b/mdbc-server/src/main/java/org/onap/music/mdbc/MDBCUtils.java
@@ -25,6 +25,7 @@ import java.util.Base64;
 import java.util.Deque;
 import java.util.HashMap;
 import java.util.Iterator;
+import java.util.List;
 import java.util.Map;
 import java.util.Properties;
 import java.util.Set;
@@ -122,4 +123,12 @@ public class MDBCUtils {
 		}
 		return prop;
 	}
+
+	public static List<Range> getTables(Map<String,List<String>> queryParsed){
+	    List<Range> ranges = new ArrayList<>();
+	    for(String table: queryParsed.keySet()){
+	       ranges.add(new Range(table));
+        }
+	    return ranges;
+    }
 }
\ No newline at end of file
diff --git a/mdbc-server/src/main/java/org/onap/music/mdbc/MdbcConnection.java b/mdbc-server/src/main/java/org/onap/music/mdbc/MdbcConnection.java
index cac4139..7574841 100755
--- a/mdbc-server/src/main/java/org/onap/music/mdbc/MdbcConnection.java
+++ b/mdbc-server/src/main/java/org/onap/music/mdbc/MdbcConnection.java
@@ -7,9 +7,9 @@
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
- * 
+ *
  *      http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -37,9 +37,11 @@ import java.sql.Struct;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.HashSet;
+import java.util.List;
 import java.util.Map;
 import java.util.Properties;
 import java.util.Set;
+import java.util.UUID;
 import java.util.concurrent.Executor;
 
 import org.onap.music.exceptions.MDBCServiceException;
@@ -51,6 +53,9 @@ import org.onap.music.logging.format.ErrorTypes;
 import org.onap.music.mdbc.mixins.DBInterface;
 import org.onap.music.mdbc.mixins.MixinFactory;
 import org.onap.music.mdbc.mixins.MusicInterface;
+import org.onap.music.mdbc.mixins.MusicInterface.OwnershipReturn;
+import org.onap.music.mdbc.query.QueryProcessor;
+import org.onap.music.mdbc.tables.MusicTxDigest;
 import org.onap.music.mdbc.tables.StagingTable;
 import org.onap.music.mdbc.tables.TxCommitProgress;
 
@@ -64,461 +69,487 @@ import org.onap.music.mdbc.tables.TxCommitProgress;
  * @author Robert Eby
  */
 public class MdbcConnection implements Connection {
-	private static EELFLoggerDelegate logger = EELFLoggerDelegate.getLogger(MdbcConnection.class);
-	
-	private final String id;			// This is the transaction id, assigned to this connection. There is no need to change the id, if connection is reused
-	private final Connection jdbcConn;		// the JDBC Connection to the actual underlying database
-	private final MusicInterface mi;
-	private final TxCommitProgress progressKeeper;
-	private final DatabasePartition partition;
-	private final DBInterface dbi;
-	private final HashMap<Range,StagingTable> transactionDigest;
-	private final Set<String> table_set;
-
-	public MdbcConnection(String id, String url, Connection c, Properties info, MusicInterface mi, TxCommitProgress progressKeeper, DatabasePartition partition) throws MDBCServiceException {
-		this.id = id;
-		this.table_set = Collections.synchronizedSet(new HashSet<String>());
-		this.transactionDigest = new HashMap<Range,StagingTable>();
-		
-		if (c == null) {
-			throw new MDBCServiceException("Connection is null");
-		}
-		this.jdbcConn = c;
-		info.putAll(MDBCUtils.getMdbcProperties());
-		String mixinDb  = info.getProperty(Configuration.KEY_DB_MIXIN_NAME, Configuration.DB_MIXIN_DEFAULT);
-		this.dbi       = MixinFactory.createDBInterface(mixinDb, mi, url, jdbcConn, info);
-		this.mi        = mi;
-		try {
-			this.setAutoCommit(c.getAutoCommit());
-		} catch (SQLException e) {
+    private static EELFLoggerDelegate logger = EELFLoggerDelegate.getLogger(MdbcConnection.class);
+
+    private final String id;			// This is the transaction id, assigned to this connection. There is no need to change the id, if connection is reused
+    private final Connection jdbcConn;		// the JDBC Connection to the actual underlying database
+    private final MusicInterface mi;
+    private final TxCommitProgress progressKeeper;
+    private final DatabasePartition partition;
+    private final DBInterface dbi;
+    private final HashMap<Range,StagingTable> transactionDigest;
+    private final Set<String> table_set;
+
+    public MdbcConnection(String id, String url, Connection c, Properties info, MusicInterface mi, TxCommitProgress progressKeeper, DatabasePartition partition) throws MDBCServiceException {
+        this.id = id;
+        this.table_set = Collections.synchronizedSet(new HashSet<String>());
+        this.transactionDigest = new HashMap<Range,StagingTable>();
+
+        if (c == null) {
+            throw new MDBCServiceException("Connection is null");
+        }
+        this.jdbcConn = c;
+        info.putAll(MDBCUtils.getMdbcProperties());
+        String mixinDb  = info.getProperty(Configuration.KEY_DB_MIXIN_NAME, Configuration.DB_MIXIN_DEFAULT);
+        this.dbi       = MixinFactory.createDBInterface(mixinDb, mi, url, jdbcConn, info);
+        this.mi        = mi;
+        try {
+            this.setAutoCommit(c.getAutoCommit());
+        } catch (SQLException e) {
             logger.error("Failure in autocommit");
-			logger.error(EELFLoggerDelegate.errorLogger, e.getMessage(), AppMessages.QUERYERROR, ErrorTypes.QUERYERROR, ErrorSeverity.CRITICAL);
-		}
-
-		// Verify the tables in MUSIC match the tables in the database
-		// and create triggers on any tables that need them
-		try {
-			this.synchronizeTables();
-		} catch (QueryException e) {
-		    logger.error("Error syncrhonizing tables");
-			logger.error(EELFLoggerDelegate.errorLogger, e.getMessage(), AppMessages.QUERYERROR, ErrorTypes.QUERYERROR, ErrorSeverity.CRITICAL);
-		}
-		this.progressKeeper = progressKeeper;
-		this.partition = partition;
-		
+            logger.error(EELFLoggerDelegate.errorLogger, e.getMessage(), AppMessages.QUERYERROR, ErrorTypes.QUERYERROR, ErrorSeverity.CRITICAL);
+        }
+
+        // Verify the tables in MUSIC match the tables in the database
+        // and create triggers on any tables that need them
+        try {
+            this.synchronizeTables();
+        } catch (QueryException e) {
+            logger.error("Error syncrhonizing tables");
+            logger.error(EELFLoggerDelegate.errorLogger, e.getMessage(), AppMessages.QUERYERROR, ErrorTypes.QUERYERROR, ErrorSeverity.CRITICAL);
+        }
+        this.progressKeeper = progressKeeper;
+        this.partition = partition;
+
         logger.debug("Mdbc connection created with id: "+id);
-	}
-
-	@Override
-	public <T> T unwrap(Class<T> iface) throws SQLException {
-		logger.error(EELFLoggerDelegate.errorLogger, "proxyconn unwrap: " + iface.getName());
-		return jdbcConn.unwrap(iface);
-	}
-
-	@Override
-	public boolean isWrapperFor(Class<?> iface) throws SQLException {
-		logger.error(EELFLoggerDelegate.errorLogger, "proxystatement iswrapperfor: " + iface.getName());
-		return jdbcConn.isWrapperFor(iface);
-	}
-
-	@Override
-	public Statement createStatement() throws SQLException {
-		return new MdbcCallableStatement(jdbcConn.createStatement(), this);
-	}
-
-	@Override
-	public PreparedStatement prepareStatement(String sql) throws SQLException {
-		//TODO: grab the sql call from here and all the other preparestatement calls
-		return new MdbcPreparedStatement(jdbcConn.prepareStatement(sql), sql, this);
-	}
-
-	@Override
-	public CallableStatement prepareCall(String sql) throws SQLException {
-		return new MdbcCallableStatement(jdbcConn.prepareCall(sql), this);
-	}
-
-	@Override
-	public String nativeSQL(String sql) throws SQLException {
-		return jdbcConn.nativeSQL(sql);
-	}
-
-	@Override
-	public void setAutoCommit(boolean autoCommit) throws SQLException {
-		boolean b = jdbcConn.getAutoCommit();
-		if (b != autoCommit) {
-		    if(progressKeeper!=null) progressKeeper.commitRequested(id);
-		    logger.debug(EELFLoggerDelegate.applicationLogger,"autocommit changed to "+b);
-			if (b) {
-				// My reading is that turning autoCOmmit ON should automatically commit any outstanding transaction
-				if(id == null || id.isEmpty()) {
-					logger.error(EELFLoggerDelegate.errorLogger, "Connection ID is null",AppMessages.UNKNOWNERROR, ErrorSeverity.CRITICAL, ErrorTypes.QUERYERROR);
-					throw new SQLException("tx id is null");
-				}
-				try {
-					mi.commitLog(partition, transactionDigest, id, progressKeeper);
-				} catch (MDBCServiceException e) {
-					// TODO Auto-generated catch block
-					logger.error("Cannot commit log to music" + e.getStackTrace());
-					throw new SQLException(e.getMessage());
-				}
-			}
-			if(progressKeeper!=null) {
+    }
+
+    @Override
+    public <T> T unwrap(Class<T> iface) throws SQLException {
+        logger.error(EELFLoggerDelegate.errorLogger, "proxyconn unwrap: " + iface.getName());
+        return jdbcConn.unwrap(iface);
+    }
+
+    @Override
+    public boolean isWrapperFor(Class<?> iface) throws SQLException {
+        logger.error(EELFLoggerDelegate.errorLogger, "proxystatement iswrapperfor: " + iface.getName());
+        return jdbcConn.isWrapperFor(iface);
+    }
+
+    @Override
+    public Statement createStatement() throws SQLException {
+        return new MdbcCallableStatement(jdbcConn.createStatement(), this);
+    }
+
+    @Override
+    public PreparedStatement prepareStatement(String sql) throws SQLException {
+        //TODO: grab the sql call from here and all the other preparestatement calls
+        return new MdbcPreparedStatement(jdbcConn.prepareStatement(sql), sql, this);
+    }
+
+    @Override
+    public CallableStatement prepareCall(String sql) throws SQLException {
+        return new MdbcCallableStatement(jdbcConn.prepareCall(sql), this);
+    }
+
+    @Override
+    public String nativeSQL(String sql) throws SQLException {
+        return jdbcConn.nativeSQL(sql);
+    }
+
+    @Override
+    public void setAutoCommit(boolean autoCommit) throws SQLException {
+        boolean b = jdbcConn.getAutoCommit();
+        if (b != autoCommit) {
+            if(progressKeeper!=null) progressKeeper.commitRequested(id);
+            logger.debug(EELFLoggerDelegate.applicationLogger,"autocommit changed to "+b);
+            if (b) {
+                // My reading is that turning autoCOmmit ON should automatically commit any outstanding transaction
+                if(id == null || id.isEmpty()) {
+                    logger.error(EELFLoggerDelegate.errorLogger, "Connection ID is null",AppMessages.UNKNOWNERROR, ErrorSeverity.CRITICAL, ErrorTypes.QUERYERROR);
+                    throw new SQLException("tx id is null");
+                }
+                try {
+                    mi.commitLog(partition, transactionDigest, id, progressKeeper);
+                } catch (MDBCServiceException e) {
+                    // TODO Auto-generated catch block
+                    logger.error("Cannot commit log to music" + e.getStackTrace());
+                    throw new SQLException(e.getMessage());
+                }
+            }
+            if(progressKeeper!=null) {
                 progressKeeper.setMusicDone(id);
-			}
-			jdbcConn.setAutoCommit(autoCommit);
+            }
+            jdbcConn.setAutoCommit(autoCommit);
             if(progressKeeper!=null) {
                 progressKeeper.setSQLDone(id);
             }
             if(progressKeeper!=null&&progressKeeper.isComplete(id)){
                 progressKeeper.reinitializeTxProgress(id);
             }
-		}
-	}
-
-	@Override
-	public boolean getAutoCommit() throws SQLException {
-		return jdbcConn.getAutoCommit();
-	}
-
-	/**
-	 * Perform a commit, as requested by the JDBC driver.  If any row updates have been delayed,
-	 * they are performed now and copied into MUSIC.
-	 * @throws SQLException 
-	 */
-	@Override
-	public void commit() throws SQLException {
-		if(progressKeeper.isComplete(id)) {
-			return;
-		}
-		if(progressKeeper != null) {
-			progressKeeper.commitRequested(id);
-		}
-
-		try {
-			logger.debug(EELFLoggerDelegate.applicationLogger, " commit ");
-			// transaction was committed -- add all the updates into the REDO-Log in MUSIC
-			mi.commitLog(partition, transactionDigest, id, progressKeeper);
-		} catch (MDBCServiceException e) {
-			//If the commit fail, then a new commitId should be used 
-			logger.error(EELFLoggerDelegate.errorLogger, "Commit to music failed", AppMessages.UNKNOWNERROR, ErrorTypes.UNKNOWN, ErrorSeverity.FATAL);
-			throw new SQLException("Failure commiting to MUSIC");
-		}
-
-		if(progressKeeper != null) {
-			progressKeeper.setMusicDone(id);
-		}
-
-		jdbcConn.commit();
-
-		if(progressKeeper != null) {
-			progressKeeper.setSQLDone(id);
-		}
-		//MusicMixin.releaseZKLocks(MusicMixin.currentLockMap.get(getConnID()));
+        }
+    }
+
+    @Override
+    public boolean getAutoCommit() throws SQLException {
+        return jdbcConn.getAutoCommit();
+    }
+
+    /**
+     * Perform a commit, as requested by the JDBC driver.  If any row updates have been delayed,
+     * they are performed now and copied into MUSIC.
+     * @throws SQLException
+     */
+    @Override
+    public void commit() throws SQLException {
+        if(progressKeeper.isComplete(id)) {
+            return;
+        }
+        if(progressKeeper != null) {
+            progressKeeper.commitRequested(id);
+        }
+
+        try {
+            logger.debug(EELFLoggerDelegate.applicationLogger, " commit ");
+            // transaction was committed -- add all the updates into the REDO-Log in MUSIC
+            mi.commitLog(partition, transactionDigest, id, progressKeeper);
+        } catch (MDBCServiceException e) {
+            //If the commit fail, then a new commitId should be used
+            logger.error(EELFLoggerDelegate.errorLogger, "Commit to music failed", AppMessages.UNKNOWNERROR, ErrorTypes.UNKNOWN, ErrorSeverity.FATAL);
+            throw new SQLException("Failure commiting to MUSIC");
+        }
+
+        if(progressKeeper != null) {
+            progressKeeper.setMusicDone(id);
+        }
+
+        jdbcConn.commit();
+
+        if(progressKeeper != null) {
+            progressKeeper.setSQLDone(id);
+        }
+        //MusicMixin.releaseZKLocks(MusicMixin.currentLockMap.get(getConnID()));
         if(progressKeeper.isComplete(id)){
-		    progressKeeper.reinitializeTxProgress(id);
+            progressKeeper.reinitializeTxProgress(id);
+        }
+
+        //\TODO try to execute outside of the critical path of commit
+        try {
+            relinquishIfRequired(partition);
+        } catch (MDBCServiceException e) {
+            logger.warn("Error trying to relinquish: "+partition.toString());
         }
-	}
-
-	/**
-	 * Perform a rollback, as requested by the JDBC driver.  If any row updates have been delayed,
-	 * they are discarded.
-	 */
-	@Override
-	public void rollback() throws SQLException {
-		logger.debug(EELFLoggerDelegate.applicationLogger, "Rollback");;
-		transactionDigest.clear();
-		jdbcConn.rollback();
-		progressKeeper.reinitializeTxProgress(id);
-	}
-
-	/**
-	 * Close this MdbcConnection.
-	 */
-	@Override
-	public void close() throws SQLException {
-	    logger.debug("Closing mdbc connection with id:"+id);
-	    if (dbi != null) {
-			dbi.close();
-		}
-		if (jdbcConn != null && !jdbcConn.isClosed()) {
+    }
+
+    /**
+     * Perform a rollback, as requested by the JDBC driver.  If any row updates have been delayed,
+     * they are discarded.
+     */
+    @Override
+    public void rollback() throws SQLException {
+        logger.debug(EELFLoggerDelegate.applicationLogger, "Rollback");;
+        transactionDigest.clear();
+        jdbcConn.rollback();
+        progressKeeper.reinitializeTxProgress(id);
+    }
+
+    /**
+     * Close this MdbcConnection.
+     */
+    @Override
+    public void close() throws SQLException {
+        logger.debug("Closing mdbc connection with id:"+id);
+        if (dbi != null) {
+            dbi.close();
+        }
+        if (jdbcConn != null && !jdbcConn.isClosed()) {
             logger.debug("Closing jdbc from mdbc with id:"+id);
-			jdbcConn.close();
-			logger.debug("Connection was closed for id:" + id);
-		}
-	}
-
-	@Override
-	public boolean isClosed() throws SQLException {
-		return jdbcConn.isClosed();
-	}
-
-	@Override
-	public DatabaseMetaData getMetaData() throws SQLException {
-		return jdbcConn.getMetaData();
-	}
-
-	@Override
-	public void setReadOnly(boolean readOnly) throws SQLException {
-		jdbcConn.setReadOnly(readOnly);
-	}
-
-	@Override
-	public boolean isReadOnly() throws SQLException {
-		return jdbcConn.isReadOnly();
-	}
-
-	@Override
-	public void setCatalog(String catalog) throws SQLException {
-		jdbcConn.setCatalog(catalog);
-	}
-
-	@Override
-	public String getCatalog() throws SQLException {
-		return jdbcConn.getCatalog();
-	}
-
-	@Override
-	public void setTransactionIsolation(int level) throws SQLException {
-		jdbcConn.setTransactionIsolation(level);
-	}
-
-	@Override
-	public int getTransactionIsolation() throws SQLException {
-		return jdbcConn.getTransactionIsolation();
-	}
-
-	@Override
-	public SQLWarning getWarnings() throws SQLException {
-		return jdbcConn.getWarnings();
-	}
-
-	@Override
-	public void clearWarnings() throws SQLException {
-		jdbcConn.clearWarnings();
-	}
-
-	@Override
-	public Statement createStatement(int resultSetType, int resultSetConcurrency) throws SQLException {
-		return new MdbcCallableStatement(jdbcConn.createStatement(resultSetType, resultSetConcurrency), this);
-	}
-
-	@Override
-	public PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency)
-			throws SQLException {
-		return new MdbcCallableStatement(jdbcConn.prepareStatement(sql, resultSetType, resultSetConcurrency), sql, this);
-	}
-
-	@Override
-	public CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency) throws SQLException {
-		return new MdbcCallableStatement(jdbcConn.prepareCall(sql, resultSetType, resultSetConcurrency), this);
-	}
-
-	@Override
-	public Map<String, Class<?>> getTypeMap() throws SQLException {
-		return jdbcConn.getTypeMap();
-	}
-
-	@Override
-	public void setTypeMap(Map<String, Class<?>> map) throws SQLException {
-		jdbcConn.setTypeMap(map);
-	}
-
-	@Override
-	public void setHoldability(int holdability) throws SQLException {
-		jdbcConn.setHoldability(holdability);
-	}
-
-	@Override
-	public int getHoldability() throws SQLException {
-		return jdbcConn.getHoldability();
-	}
-
-	@Override
-	public Savepoint setSavepoint() throws SQLException {
-		return jdbcConn.setSavepoint();
-	}
-
-	@Override
-	public Savepoint setSavepoint(String name) throws SQLException {
-		return jdbcConn.setSavepoint(name);
-	}
-
-	@Override
-	public void rollback(Savepoint savepoint) throws SQLException {
-		jdbcConn.rollback(savepoint);
-	}
-
-	@Override
-	public void releaseSavepoint(Savepoint savepoint) throws SQLException {
-		jdbcConn.releaseSavepoint(savepoint);
-	}
-
-	@Override
-	public Statement createStatement(int resultSetType, int resultSetConcurrency, int resultSetHoldability)
-			throws SQLException {
-		return new MdbcCallableStatement(jdbcConn.createStatement(resultSetType, resultSetConcurrency, resultSetHoldability), this);
-	}
-
-	@Override
-	public PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency,
-			int resultSetHoldability) throws SQLException {
-		return new MdbcCallableStatement(jdbcConn.prepareStatement(sql, resultSetType, resultSetConcurrency, resultSetHoldability), sql, this);
-	}
-
-	@Override
-	public CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency,
-			int resultSetHoldability) throws SQLException {
-		return new MdbcCallableStatement(jdbcConn.prepareCall(sql, resultSetType, resultSetConcurrency, resultSetHoldability), this);
-	}
-
-	@Override
-	public PreparedStatement prepareStatement(String sql, int autoGeneratedKeys) throws SQLException {
-		return new MdbcPreparedStatement(jdbcConn.prepareStatement(sql, autoGeneratedKeys), sql, this);
-	}
-
-	@Override
-	public PreparedStatement prepareStatement(String sql, int[] columnIndexes) throws SQLException {
-		return new MdbcPreparedStatement(jdbcConn.prepareStatement(sql, columnIndexes), sql, this);
-	}
-
-	@Override
-	public PreparedStatement prepareStatement(String sql, String[] columnNames) throws SQLException {
-		return new MdbcPreparedStatement(jdbcConn.prepareStatement(sql, columnNames), sql, this);
-	}
-
-	@Override
-	public Clob createClob() throws SQLException {
-		return jdbcConn.createClob();
-	}
-
-	@Override
-	public Blob createBlob() throws SQLException {
-		return jdbcConn.createBlob();
-	}
-
-	@Override
-	public NClob createNClob() throws SQLException {
-		return jdbcConn.createNClob();
-	}
-
-	@Override
-	public SQLXML createSQLXML() throws SQLException {
-		return jdbcConn.createSQLXML();
-	}
-
-	@Override
-	public boolean isValid(int timeout) throws SQLException {
-		return jdbcConn.isValid(timeout);
-	}
-
-	@Override
-	public void setClientInfo(String name, String value) throws SQLClientInfoException {
-		jdbcConn.setClientInfo(name, value);
-	}
-
-	@Override
-	public void setClientInfo(Properties properties) throws SQLClientInfoException {
-		jdbcConn.setClientInfo(properties);
-	}
-
-	@Override
-	public String getClientInfo(String name) throws SQLException {
-		return jdbcConn.getClientInfo(name);
-	}
-
-	@Override
-	public Properties getClientInfo() throws SQLException {
-		return jdbcConn.getClientInfo();
-	}
-
-	@Override
-	public Array createArrayOf(String typeName, Object[] elements) throws SQLException {
-		return jdbcConn.createArrayOf(typeName, elements);
-	}
-
-	@Override
-	public Struct createStruct(String typeName, Object[] attributes) throws SQLException {
-		return jdbcConn.createStruct(typeName, attributes);
-	}
-
-	@Override
-	public void setSchema(String schema) throws SQLException {
-		jdbcConn.setSchema(schema);
-	}
-
-	@Override
-	public String getSchema() throws SQLException {
-		return jdbcConn.getSchema();
-	}
-
-	@Override
-	public void abort(Executor executor) throws SQLException {
-		jdbcConn.abort(executor);
-	}
-
-	@Override
-	public void setNetworkTimeout(Executor executor, int milliseconds) throws SQLException {
-		jdbcConn.setNetworkTimeout(executor, milliseconds);
-	}
-
-	@Override
-	public int getNetworkTimeout() throws SQLException {
-		return jdbcConn.getNetworkTimeout();
-	}
-
-	
-	/**
-	 * Code to be run within the DB driver before a SQL statement is executed.  This is where tables
-	 * can be synchronized before a SELECT, for those databases that do not support SELECT triggers.
-	 * @param sql the SQL statement that is about to be executed
-	 */
-	public void preStatementHook(String sql) {
-		dbi.preStatementHook(sql);
-	}
-
-	/**
-	 * Code to be run within the DB driver after a SQL statement has been executed.  This is where remote
-	 * statement actions can be copied back to Cassandra/MUSIC.
-	 * @param sql the SQL statement that was executed
-	 */
-	public void postStatementHook(String sql) {
-		dbi.postStatementHook(sql, transactionDigest);
-	}
-
-	/**
-	 * Synchronize the list of tables in SQL with the list in MUSIC. This function should be called when the
-	 * proxy first starts, and whenever there is the possibility that tables were created or dropped.  It is synchronized
-	 * in order to prevent multiple threads from running this code in parallel.
-	 */
-	public void synchronizeTables() throws QueryException {
-		Set<String> set1 = dbi.getSQLTableSet();	// set of tables in the database
-		logger.debug(EELFLoggerDelegate.applicationLogger, "synchronizing tables:" + set1);
-		for (String tableName : set1) {
-			// This map will be filled in if this table was previously discovered
-			tableName = tableName.toUpperCase();
-			if (!table_set.contains(tableName) && !dbi.getReservedTblNames().contains(tableName)) {
-				logger.info(EELFLoggerDelegate.applicationLogger, "New table discovered: "+tableName);
-				try {
-					TableInfo ti = dbi.getTableInfo(tableName);
-					mi.initializeMusicForTable(ti,tableName);
-					//\TODO Verify if table info can be modify in the previous step, if not this step can be deleted
-					ti = dbi.getTableInfo(tableName);
-					mi.createDirtyRowTable(ti,tableName);
-					dbi.createSQLTriggers(tableName);
-					table_set.add(tableName);
-					dbi.synchronizeData(tableName);
-					logger.debug(EELFLoggerDelegate.applicationLogger, "synchronized tables:" +
-								table_set.size() + "/" + set1.size() + "tables uploaded");
-				} catch (Exception e) {
-					logger.error(EELFLoggerDelegate.errorLogger, e.getMessage(),AppMessages.UNKNOWNERROR, ErrorSeverity.CRITICAL, ErrorTypes.QUERYERROR);
-					//logger.error(EELFLoggerDelegate.errorLogger, "Exception synchronizeTables: "+e);
-					throw new QueryException();
-				}
-			}
-		}
-	}
-	
-	public DBInterface getDBInterface() {
-		return this.dbi;
-	}
+            jdbcConn.close();
+            logger.debug("Connection was closed for id:" + id);
+        }
+    }
+
+    @Override
+    public boolean isClosed() throws SQLException {
+        return jdbcConn.isClosed();
+    }
+
+    @Override
+    public DatabaseMetaData getMetaData() throws SQLException {
+        return jdbcConn.getMetaData();
+    }
+
+    @Override
+    public void setReadOnly(boolean readOnly) throws SQLException {
+        jdbcConn.setReadOnly(readOnly);
+    }
+
+    @Override
+    public boolean isReadOnly() throws SQLException {
+        return jdbcConn.isReadOnly();
+    }
+
+    @Override
+    public void setCatalog(String catalog) throws SQLException {
+        jdbcConn.setCatalog(catalog);
+    }
+
+    @Override
+    public String getCatalog() throws SQLException {
+        return jdbcConn.getCatalog();
+    }
+
+    @Override
+    public void setTransactionIsolation(int level) throws SQLException {
+        jdbcConn.setTransactionIsolation(level);
+    }
+
+    @Override
+    public int getTransactionIsolation() throws SQLException {
+        return jdbcConn.getTransactionIsolation();
+    }
+
+    @Override
+    public SQLWarning getWarnings() throws SQLException {
+        return jdbcConn.getWarnings();
+    }
+
+    @Override
+    public void clearWarnings() throws SQLException {
+        jdbcConn.clearWarnings();
+    }
+
+    @Override
+    public Statement createStatement(int resultSetType, int resultSetConcurrency) throws SQLException {
+        return new MdbcCallableStatement(jdbcConn.createStatement(resultSetType, resultSetConcurrency), this);
+    }
+
+    @Override
+    public PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency)
+        throws SQLException {
+        return new MdbcCallableStatement(jdbcConn.prepareStatement(sql, resultSetType, resultSetConcurrency), sql, this);
+    }
+
+    @Override
+    public CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency) throws SQLException {
+        return new MdbcCallableStatement(jdbcConn.prepareCall(sql, resultSetType, resultSetConcurrency), this);
+    }
+
+    @Override
+    public Map<String, Class<?>> getTypeMap() throws SQLException {
+        return jdbcConn.getTypeMap();
+    }
+
+    @Override
+    public void setTypeMap(Map<String, Class<?>> map) throws SQLException {
+        jdbcConn.setTypeMap(map);
+    }
+
+    @Override
+    public void setHoldability(int holdability) throws SQLException {
+        jdbcConn.setHoldability(holdability);
+    }
+
+    @Override
+    public int getHoldability() throws SQLException {
+        return jdbcConn.getHoldability();
+    }
+
+    @Override
+    public Savepoint setSavepoint() throws SQLException {
+        return jdbcConn.setSavepoint();
+    }
+
+    @Override
+    public Savepoint setSavepoint(String name) throws SQLException {
+        return jdbcConn.setSavepoint(name);
+    }
+
+    @Override
+    public void rollback(Savepoint savepoint) throws SQLException {
+        jdbcConn.rollback(savepoint);
+    }
+
+    @Override
+    public void releaseSavepoint(Savepoint savepoint) throws SQLException {
+        jdbcConn.releaseSavepoint(savepoint);
+    }
+
+    @Override
+    public Statement createStatement(int resultSetType, int resultSetConcurrency, int resultSetHoldability)
+        throws SQLException {
+        return new MdbcCallableStatement(jdbcConn.createStatement(resultSetType, resultSetConcurrency, resultSetHoldability), this);
+    }
+
+    @Override
+    public PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency,
+                                              int resultSetHoldability) throws SQLException {
+        return new MdbcCallableStatement(jdbcConn.prepareStatement(sql, resultSetType, resultSetConcurrency, resultSetHoldability), sql, this);
+    }
+
+    @Override
+    public CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency,
+                                         int resultSetHoldability) throws SQLException {
+        return new MdbcCallableStatement(jdbcConn.prepareCall(sql, resultSetType, resultSetConcurrency, resultSetHoldability), this);
+    }
+
+    @Override
+    public PreparedStatement prepareStatement(String sql, int autoGeneratedKeys) throws SQLException {
+        return new MdbcPreparedStatement(jdbcConn.prepareStatement(sql, autoGeneratedKeys), sql, this);
+    }
+
+    @Override
+    public PreparedStatement prepareStatement(String sql, int[] columnIndexes) throws SQLException {
+        return new MdbcPreparedStatement(jdbcConn.prepareStatement(sql, columnIndexes), sql, this);
+    }
+
+    @Override
+    public PreparedStatement prepareStatement(String sql, String[] columnNames) throws SQLException {
+        return new MdbcPreparedStatement(jdbcConn.prepareStatement(sql, columnNames), sql, this);
+    }
+
+    @Override
+    public Clob createClob() throws SQLException {
+        return jdbcConn.createClob();
+    }
+
+    @Override
+    public Blob createBlob() throws SQLException {
+        return jdbcConn.createBlob();
+    }
+
+    @Override
+    public NClob createNClob() throws SQLException {
+        return jdbcConn.createNClob();
+    }
+
+    @Override
+    public SQLXML createSQLXML() throws SQLException {
+        return jdbcConn.createSQLXML();
+    }
+
+    @Override
+    public boolean isValid(int timeout) throws SQLException {
+        return jdbcConn.isValid(timeout);
+    }
+
+    @Override
+    public void setClientInfo(String name, String value) throws SQLClientInfoException {
+        jdbcConn.setClientInfo(name, value);
+    }
+
+    @Override
+    public void setClientInfo(Properties properties) throws SQLClientInfoException {
+        jdbcConn.setClientInfo(properties);
+    }
+
+    @Override
+    public String getClientInfo(String name) throws SQLException {
+        return jdbcConn.getClientInfo(name);
+    }
+
+    @Override
+    public Properties getClientInfo() throws SQLException {
+        return jdbcConn.getClientInfo();
+    }
+
+    @Override
+    public Array createArrayOf(String typeName, Object[] elements) throws SQLException {
+        return jdbcConn.createArrayOf(typeName, elements);
+    }
+
+    @Override
+    public Struct createStruct(String typeName, Object[] attributes) throws SQLException {
+        return jdbcConn.createStruct(typeName, attributes);
+    }
+
+    @Override
+    public void setSchema(String schema) throws SQLException {
+        jdbcConn.setSchema(schema);
+    }
+
+    @Override
+    public String getSchema() throws SQLException {
+        return jdbcConn.getSchema();
+    }
+
+    @Override
+    public void abort(Executor executor) throws SQLException {
+        jdbcConn.abort(executor);
+    }
+
+    @Override
+    public void setNetworkTimeout(Executor executor, int milliseconds) throws SQLException {
+        jdbcConn.setNetworkTimeout(executor, milliseconds);
+    }
+
+    @Override
+    public int getNetworkTimeout() throws SQLException {
+        return jdbcConn.getNetworkTimeout();
+    }
+
+    /**
+     * Code to be run within the DB driver before a SQL statement is executed.  This is where tables
+     * can be synchronized before a SELECT, for those databases that do not support SELECT triggers.
+     * @param sql the SQL statement that is about to be executed
+     */
+    public void preStatementHook(final String sql) throws MDBCServiceException {
+        //TODO: verify ownership of keys here
+        //Parse tables from the sql query
+        Map<String, List<String>> tableToInstruction = QueryProcessor.extractTableFromQuery(sql);
+        //Check ownership of keys
+        own(MDBCUtils.getTables(tableToInstruction));
+        dbi.preStatementHook(sql);
+    }
+
+
+    /**
+     * Code to be run within the DB driver after a SQL statement has been executed.  This is where remote
+     * statement actions can be copied back to Cassandra/MUSIC.
+     * @param sql the SQL statement that was executed
+     */
+    public void postStatementHook(String sql) {
+        dbi.postStatementHook(sql, transactionDigest);
+    }
+
+    /**
+     * Synchronize the list of tables in SQL with the list in MUSIC. This function should be called when the
+     * proxy first starts, and whenever there is the possibility that tables were created or dropped.  It is synchronized
+     * in order to prevent multiple threads from running this code in parallel.
+     */
+    public void synchronizeTables() throws QueryException {
+        Set<String> set1 = dbi.getSQLTableSet();	// set of tables in the database
+        logger.debug(EELFLoggerDelegate.applicationLogger, "synchronizing tables:" + set1);
+        for (String tableName : set1) {
+            // This map will be filled in if this table was previously discovered
+            tableName = tableName.toUpperCase();
+            if (!table_set.contains(tableName) && !dbi.getReservedTblNames().contains(tableName)) {
+                logger.info(EELFLoggerDelegate.applicationLogger, "New table discovered: "+tableName);
+                try {
+                    TableInfo ti = dbi.getTableInfo(tableName);
+                    mi.initializeMusicForTable(ti,tableName);
+                    //\TODO Verify if table info can be modify in the previous step, if not this step can be deleted
+                    ti = dbi.getTableInfo(tableName);
+                    mi.createDirtyRowTable(ti,tableName);
+                    dbi.createSQLTriggers(tableName);
+                    table_set.add(tableName);
+                    dbi.synchronizeData(tableName);
+                    logger.debug(EELFLoggerDelegate.applicationLogger, "synchronized tables:" +
+                        table_set.size() + "/" + set1.size() + "tables uploaded");
+                } catch (Exception e) {
+                    logger.error(EELFLoggerDelegate.errorLogger, e.getMessage(),AppMessages.UNKNOWNERROR, ErrorSeverity.CRITICAL, ErrorTypes.QUERYERROR);
+                    //logger.error(EELFLoggerDelegate.errorLogger, "Exception synchronizeTables: "+e);
+                    throw new QueryException();
+                }
+            }
+        }
+    }
+
+    public DBInterface getDBInterface() {
+        return this.dbi;
+    }
+
+    public void own(List<Range> ranges) throws MDBCServiceException {
+        final OwnershipReturn ownershipReturn = mi.own(ranges, partition);
+        final List<UUID> oldRangeIds = ownershipReturn.getOldIRangeds();
+        //\TODO: do in parallel for all range ids
+        for(UUID oldRange : oldRangeIds) {
+            MusicTxDigest.replayDigestForPartition(mi, oldRange,dbi);
+        }
+    }
+
+    public void relinquishIfRequired(DatabasePartition partition) throws MDBCServiceException {
+        mi.relinquishIfRequired(partition);
+    }
+
 }
diff --git a/mdbc-server/src/main/java/org/onap/music/mdbc/MdbcPreparedStatement.java b/mdbc-server/src/main/java/org/onap/music/mdbc/MdbcPreparedStatement.java
index 092aa94..68a40a8 100755
--- a/mdbc-server/src/main/java/org/onap/music/mdbc/MdbcPreparedStatement.java
+++ b/mdbc-server/src/main/java/org/onap/music/mdbc/MdbcPreparedStatement.java
@@ -46,6 +46,7 @@ import java.util.Calendar;
 
 import org.apache.commons.lang3.StringUtils;
 
+import org.onap.music.exceptions.MDBCServiceException;
 import org.onap.music.logging.EELFLoggerDelegate;
 
 /**
@@ -93,11 +94,13 @@ public class MdbcPreparedStatement extends MdbcStatement implements PreparedStat
 			r = stmt.executeQuery(sql);
 			mConn.postStatementHook(sql);
 			synchronizeTables(sql);
-		} catch (Exception e) {
+		} catch (SQLException e) {
 			String nm = e.getClass().getName();
 			logger.error(EELFLoggerDelegate.errorLogger, "executeQuery: exception "+nm);
 			if (!nm.startsWith(DATASTAX_PREFIX))
 				throw e;
+		} catch (MDBCServiceException e) {
+		    throw new SQLException(e.getMessage());
 		}
 		return r;
 	}
@@ -112,11 +115,13 @@ public class MdbcPreparedStatement extends MdbcStatement implements PreparedStat
 			n = stmt.executeUpdate(sql);
 			mConn.postStatementHook(sql);
 			synchronizeTables(sql);
-		} catch (Exception e) {
+		} catch (SQLException e) {
 			String nm = e.getClass().getName();
 			logger.error(EELFLoggerDelegate.errorLogger, "executeUpdate: exception "+nm+" "+e);
 			if (!nm.startsWith(DATASTAX_PREFIX))
 				throw e;
+        } catch (MDBCServiceException e) {
+		    throw new SQLException(e.getMessage());
 		}
 		return n;
 	}
@@ -193,7 +198,7 @@ public class MdbcPreparedStatement extends MdbcStatement implements PreparedStat
 			b = stmt.execute(sql);
 			mConn.postStatementHook(sql);
 			synchronizeTables(sql);
-		} catch (Exception e) {
+		} catch (SQLException e) {
 			String nm = e.getClass().getName();
 			logger.error(EELFLoggerDelegate.errorLogger, "execute: exception "+nm+" "+e);
 			// Note: this seems to be the only call Camunda uses, so it is the only one I am fixing for now.
@@ -205,6 +210,8 @@ public class MdbcPreparedStatement extends MdbcStatement implements PreparedStat
 				logger.error(EELFLoggerDelegate.errorLogger, " Exception "+nm+" "+e);
 				throw e;
 			}
+		} catch (MDBCServiceException e) {
+		    throw new SQLException(e.getMessage());
 		}
 		return b;
 	}
@@ -305,11 +312,13 @@ public class MdbcPreparedStatement extends MdbcStatement implements PreparedStat
 			n = stmt.executeUpdate(sql, autoGeneratedKeys);
 			mConn.postStatementHook(sql);
 			synchronizeTables(sql);
-		} catch (Exception e) {
+		} catch (SQLException e) {
 			String nm = e.getClass().getName();
 			logger.error(EELFLoggerDelegate.errorLogger,"executeUpdate: exception "+nm);
 			if (!nm.startsWith(DATASTAX_PREFIX))
 				throw e;
+		} catch (MDBCServiceException e) {
+		    throw new SQLException(e.getMessage());
 		}
 		return n;
 	}
@@ -323,12 +332,14 @@ public class MdbcPreparedStatement extends MdbcStatement implements PreparedStat
 			n = stmt.executeUpdate(sql, columnIndexes);
 			mConn.postStatementHook(sql);
 			synchronizeTables(sql);
-		} catch (Exception e) {
+		} catch (SQLException e) {
 			String nm = e.getClass().getName();
 			logger.error(EELFLoggerDelegate.errorLogger,"executeUpdate: exception "+nm);
 			if (!nm.startsWith(DATASTAX_PREFIX))
 				throw e;
-		}
+        } catch (MDBCServiceException e) {
+            throw new SQLException(e.getMessage());
+        }
 		return n;
 	}
 
@@ -341,11 +352,13 @@ public class MdbcPreparedStatement extends MdbcStatement implements PreparedStat
 			n = stmt.executeUpdate(sql, columnNames);
 			mConn.postStatementHook(sql);
 			synchronizeTables(sql);
-		} catch (Exception e) {
+		} catch (SQLException e) {
 			String nm = e.getClass().getName();
 			logger.error(EELFLoggerDelegate.errorLogger,"executeUpdate: exception "+nm);
 			if (!nm.startsWith(DATASTAX_PREFIX))
 				throw e;
+        } catch (MDBCServiceException e) {
+		    throw new SQLException(e.getMessage());
 		}
 		return n;
 	}
@@ -359,11 +372,13 @@ public class MdbcPreparedStatement extends MdbcStatement implements PreparedStat
 			b = stmt.execute(sql, autoGeneratedKeys);
 			mConn.postStatementHook(sql);
 			synchronizeTables(sql);
-		} catch (Exception e) {
+		} catch (SQLException e) {
 			String nm = e.getClass().getName();
 			logger.error(EELFLoggerDelegate.errorLogger,"execute: exception "+nm);
 			if (!nm.startsWith(DATASTAX_PREFIX))
 				throw e;
+        } catch (MDBCServiceException e) {
+		    throw new SQLException(e.getMessage());
 		}
 		return b;
 	}
@@ -377,11 +392,13 @@ public class MdbcPreparedStatement extends MdbcStatement implements PreparedStat
 			b = stmt.execute(sql, columnIndexes);
 			mConn.postStatementHook(sql);
 			synchronizeTables(sql);
-		} catch (Exception e) {
+		} catch (SQLException e) {
 			String nm = e.getClass().getName();
 			logger.error(EELFLoggerDelegate.errorLogger,"execute: exception "+nm);
 			if (!nm.startsWith(DATASTAX_PREFIX))
 				throw e;
+		} catch (MDBCServiceException e) {
+		    throw new SQLException(e.getMessage());
 		}
 		return b;
 	}
@@ -395,11 +412,13 @@ public class MdbcPreparedStatement extends MdbcStatement implements PreparedStat
 			b = stmt.execute(sql, columnNames);
 			mConn.postStatementHook(sql);
 			synchronizeTables(sql);
-		} catch (Exception e) {
+		} catch (SQLException e) {
 			String nm = e.getClass().getName();
 			logger.error(EELFLoggerDelegate.errorLogger,"execute: exception "+nm);
 			if (!nm.startsWith(DATASTAX_PREFIX))
 				throw e;
+        } catch (MDBCServiceException e) {
+		    throw new SQLException(e.getMessage());
 		}
 		return b;
 	}
@@ -443,13 +462,17 @@ public class MdbcPreparedStatement extends MdbcStatement implements PreparedStat
 			r = ((PreparedStatement)stmt).executeQuery();;
 			mConn.postStatementHook(sql);
 			synchronizeTables(sql);
-		} catch (Exception e) {
+		} catch (SQLException e) {
 			e.printStackTrace();
 			String nm = e.getClass().getName();
 			logger.error(EELFLoggerDelegate.errorLogger,"executeQuery: exception "+nm);
 			if (!nm.startsWith(DATASTAX_PREFIX))
 				throw e;
+        } catch (MDBCServiceException e) {
+		    throw new SQLException(e.getMessage());
 		}
+
+
 		return r;
 	}
 
@@ -462,12 +485,14 @@ public class MdbcPreparedStatement extends MdbcStatement implements PreparedStat
 			n = ((PreparedStatement)stmt).executeUpdate();
 			mConn.postStatementHook(sql);
 			synchronizeTables(sql);
-		} catch (Exception e) {
+		} catch (SQLException e) {
 			e.printStackTrace();
 			String nm = e.getClass().getName();
 			logger.error(EELFLoggerDelegate.errorLogger,"executeUpdate: exception "+nm);
 			if (!nm.startsWith(DATASTAX_PREFIX))
 				throw e;
+        } catch (MDBCServiceException e) {
+		    throw new SQLException(e.getMessage());
 		}
 		return n;
 	}
@@ -583,7 +608,7 @@ public class MdbcPreparedStatement extends MdbcStatement implements PreparedStat
 			b = ((PreparedStatement)stmt).execute();
 			mConn.postStatementHook(sql);
 			synchronizeTables(sql);
-		} catch (Exception e) {
+		} catch (SQLException e) {
 			e.printStackTrace();
 			String nm = e.getClass().getName();
 			// Note: this seems to be the only call Camunda uses, so it is the only one I am fixing for now.
@@ -595,6 +620,8 @@ public class MdbcPreparedStatement extends MdbcStatement implements PreparedStat
 				logger.error(EELFLoggerDelegate.errorLogger,"execute: exception "+nm);
 				throw e;
 			}
+        } catch (MDBCServiceException e) {
+		    throw new SQLException(e.getMessage());
 		}
 		return b;
 	}
diff --git a/mdbc-server/src/main/java/org/onap/music/mdbc/MdbcServerLogic.java b/mdbc-server/src/main/java/org/onap/music/mdbc/MdbcServerLogic.java
index 989b6e4..a70c359 100755
--- a/mdbc-server/src/main/java/org/onap/music/mdbc/MdbcServerLogic.java
+++ b/mdbc-server/src/main/java/org/onap/music/mdbc/MdbcServerLogic.java
@@ -57,7 +57,7 @@ public class MdbcServerLogic extends JdbcMeta{
 
 	public MdbcServerLogic(String Url, Properties info, NodeConfiguration config) throws SQLException, MDBCServiceException {
 		super(Url,info);
-		this.manager = new StateManager(Url,info,config.partition,config.nodeName, "test"); //FIXME: db name should not be passed in ahead of time
+		this.manager = new StateManager(Url,info,config.nodeName, "test"); //FIXME: db name should not be passed in ahead of time
 		this.info = info;
         int concurrencyLevel = Integer.parseInt(
                 info.getProperty(ConnectionCacheSettings.CONCURRENCY_LEVEL.key(),
diff --git a/mdbc-server/src/main/java/org/onap/music/mdbc/MdbcStatement.java b/mdbc-server/src/main/java/org/onap/music/mdbc/MdbcStatement.java
index 97f4be4..26b9acd 100755
--- a/mdbc-server/src/main/java/org/onap/music/mdbc/MdbcStatement.java
+++ b/mdbc-server/src/main/java/org/onap/music/mdbc/MdbcStatement.java
@@ -7,9 +7,9 @@
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
- * 
+ *
  *      http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -25,6 +25,7 @@ import java.sql.SQLException;
 import java.sql.SQLWarning;
 import java.sql.Statement;
 
+import org.onap.music.exceptions.MDBCServiceException;
 import org.onap.music.exceptions.QueryException;
 import org.onap.music.logging.EELFLoggerDelegate;
 import org.onap.music.logging.format.AppMessages;
@@ -38,398 +39,416 @@ import org.onap.music.logging.format.ErrorTypes;
  * @author Robert Eby
  */
 public class MdbcStatement implements Statement {
-	private EELFLoggerDelegate logger = EELFLoggerDelegate.getLogger(MdbcStatement.class);
-	private static final String DATASTAX_PREFIX = "com.datastax.driver";
-
-	final Statement stmt;		// the Statement that we are proxying
-	final MdbcConnection mConn;
-	//\TODO We may need to all pass the connection object to support autocommit
-
-	public MdbcStatement(Statement s, MdbcConnection mConn) {
-		this.stmt = s;
-		this.mConn = mConn;
-	}
-
-	public MdbcStatement(Statement stmt, String sql, MdbcConnection mConn) {
-		//\TODO why there is a constructor with a sql parameter in a not PreparedStatement
-		this.stmt = stmt;
-		this.mConn = mConn;
-	}
-	
-	@Override
-	public <T> T unwrap(Class<T> iface) throws SQLException {
-		logger.error(EELFLoggerDelegate.errorLogger, "proxystatement unwrap: " + iface.getName());
-		return stmt.unwrap(iface);
-	}
-
-	@Override
-	public boolean isWrapperFor(Class<?> iface) throws SQLException {
-		logger.error(EELFLoggerDelegate.errorLogger, "proxystatement isWrapperFor: " + iface.getName());
-		return stmt.isWrapperFor(iface);
-	}
-
-	@Override
-	public ResultSet executeQuery(String sql) throws SQLException {
-		logger.debug(EELFLoggerDelegate.applicationLogger,"executeQuery: "+sql);
-		ResultSet r = null;
-		try {
-			mConn.preStatementHook(sql);
-			r = stmt.executeQuery(sql);
-			mConn.postStatementHook(sql);
-			synchronizeTables(sql);
-		} catch (Exception e) {
-			String nm = e.getClass().getName();
-			logger.error(EELFLoggerDelegate.errorLogger, "executeQuery: exception "+nm);
-			if (!nm.startsWith(DATASTAX_PREFIX))
-				throw e;
-		}
-		return r;
-	}
-
-	@Override
-	public int executeUpdate(String sql) throws SQLException {
-		logger.debug(EELFLoggerDelegate.applicationLogger,"executeUpdate: "+sql);
-		
-		int n = 0;
-		try {
-			mConn.preStatementHook(sql);
-			n = stmt.executeUpdate(sql);
-			mConn.postStatementHook(sql);
-			synchronizeTables(sql);
-		} catch (Exception e) {
-			String nm = e.getClass().getName();
-			logger.error(EELFLoggerDelegate.errorLogger, "executeUpdate: exception "+nm+" "+e);
-			if (!nm.startsWith(DATASTAX_PREFIX))
-				throw e;
-		}
-		return n;
-	}
-
-	@Override
-	public void close() throws SQLException {
-		logger.debug(EELFLoggerDelegate.applicationLogger,"Statement close: ");
-		stmt.close();
-	}
-
-	@Override
-	public int getMaxFieldSize() throws SQLException {
-		logger.debug(EELFLoggerDelegate.applicationLogger,"getMaxFieldSize");
-		return stmt.getMaxFieldSize();
-	}
-
-	@Override
-	public void setMaxFieldSize(int max) throws SQLException {
-		stmt.setMaxFieldSize(max);
-	}
-
-	@Override
-	public int getMaxRows() throws SQLException {
-		return stmt.getMaxRows();
-	}
-
-	@Override
-	public void setMaxRows(int max) throws SQLException {
-		stmt.setMaxRows(max);
-	}
-
-	@Override
-	public void setEscapeProcessing(boolean enable) throws SQLException {
-		stmt.setEscapeProcessing(enable);
-	}
-
-	@Override
-	public int getQueryTimeout() throws SQLException {
-		return stmt.getQueryTimeout();
-	}
-
-	@Override
-	public void setQueryTimeout(int seconds) throws SQLException {
-		//\TODO: we also need to implement a higher level timeout in MDBC 
-		logger.debug(EELFLoggerDelegate.applicationLogger,"setQueryTimeout seconds "+ seconds);
-		stmt.setQueryTimeout(seconds);
-	}
-
-	@Override
-	public void cancel() throws SQLException {
-		stmt.cancel();
-	}
-
-	@Override
-	public SQLWarning getWarnings() throws SQLException {
-		return stmt.getWarnings();
-	}
-
-	@Override
-	public void clearWarnings() throws SQLException {
-		stmt.clearWarnings();
-	}
-
-	@Override
-	public void setCursorName(String name) throws SQLException {
-		stmt.setCursorName(name);
-	}
-
-	@Override
-	public boolean execute(String sql) throws SQLException {
-		logger.debug(EELFLoggerDelegate.applicationLogger,"execute: "+sql);
-		boolean b = false;
-		//\TODO Add the result of the postStatementHook to b
-		try {
-			mConn.preStatementHook(sql);
-			b = stmt.execute(sql);
-			mConn.postStatementHook(sql);
-			synchronizeTables(sql);
-		} catch (Exception e) {
-			String nm = e.getClass().getName();
-			logger.error(EELFLoggerDelegate.errorLogger, "execute: exception "+nm+" "+e);
-			// Note: this seems to be the only call Camunda uses, so it is the only one I am fixing for now.
-			boolean ignore = nm.startsWith(DATASTAX_PREFIX);
+    private EELFLoggerDelegate logger = EELFLoggerDelegate.getLogger(MdbcStatement.class);
+    private static final String DATASTAX_PREFIX = "com.datastax.driver";
+
+    final Statement stmt;		// the Statement that we are proxying
+    final MdbcConnection mConn;
+    //\TODO We may need to all pass the connection object to support autocommit
+
+    public MdbcStatement(Statement s, MdbcConnection mConn) {
+        this.stmt = s;
+        this.mConn = mConn;
+    }
+
+    public MdbcStatement(Statement stmt, String sql, MdbcConnection mConn) {
+        //\TODO why there is a constructor with a sql parameter in a not PreparedStatement
+        this.stmt = stmt;
+        this.mConn = mConn;
+    }
+
+    @Override
+    public <T> T unwrap(Class<T> iface) throws SQLException {
+        logger.error(EELFLoggerDelegate.errorLogger, "proxystatement unwrap: " + iface.getName());
+        return stmt.unwrap(iface);
+    }
+
+    @Override
+    public boolean isWrapperFor(Class<?> iface) throws SQLException {
+        logger.error(EELFLoggerDelegate.errorLogger, "proxystatement isWrapperFor: " + iface.getName());
+        return stmt.isWrapperFor(iface);
+    }
+
+    @Override
+    public ResultSet executeQuery(String sql) throws SQLException {
+        logger.debug(EELFLoggerDelegate.applicationLogger,"executeQuery: "+sql);
+        ResultSet r = null;
+        try {
+            mConn.preStatementHook(sql);
+            r = stmt.executeQuery(sql);
+            mConn.postStatementHook(sql);
+            synchronizeTables(sql);
+        } catch (SQLException e) {
+            String nm = e.getClass().getName();
+            logger.error(EELFLoggerDelegate.errorLogger, "executeQuery: exception "+nm);
+            if (!nm.startsWith(DATASTAX_PREFIX))
+                throw e;
+        } catch (MDBCServiceException e) {
+            throw new SQLException(e.getMessage());
+        }
+        return r;
+    }
+
+    @Override
+    public int executeUpdate(String sql) throws SQLException {
+        logger.debug(EELFLoggerDelegate.applicationLogger,"executeUpdate: "+sql);
+
+        int n = 0;
+        try {
+            mConn.preStatementHook(sql);
+            n = stmt.executeUpdate(sql);
+            mConn.postStatementHook(sql);
+            synchronizeTables(sql);
+        } catch (SQLException e) {
+            String nm = e.getClass().getName();
+            logger.error(EELFLoggerDelegate.errorLogger, "executeUpdate: exception "+nm+" "+e);
+            if (!nm.startsWith(DATASTAX_PREFIX))
+                throw e;
+        } catch (MDBCServiceException e) {
+            throw new SQLException(e.getMessage());
+        }
+        return n;
+    }
+
+    @Override
+    public void close() throws SQLException {
+        logger.debug(EELFLoggerDelegate.applicationLogger,"Statement close: ");
+        stmt.close();
+    }
+
+    @Override
+    public int getMaxFieldSize() throws SQLException {
+        logger.debug(EELFLoggerDelegate.applicationLogger,"getMaxFieldSize");
+        return stmt.getMaxFieldSize();
+    }
+
+    @Override
+    public void setMaxFieldSize(int max) throws SQLException {
+        stmt.setMaxFieldSize(max);
+    }
+
+    @Override
+    public int getMaxRows() throws SQLException {
+        return stmt.getMaxRows();
+    }
+
+    @Override
+    public void setMaxRows(int max) throws SQLException {
+        stmt.setMaxRows(max);
+    }
+
+    @Override
+    public void setEscapeProcessing(boolean enable) throws SQLException {
+        stmt.setEscapeProcessing(enable);
+    }
+
+    @Override
+    public int getQueryTimeout() throws SQLException {
+        return stmt.getQueryTimeout();
+    }
+
+    @Override
+    public void setQueryTimeout(int seconds) throws SQLException {
+        //\TODO: we also need to implement a higher level timeout in MDBC
+        logger.debug(EELFLoggerDelegate.applicationLogger,"setQueryTimeout seconds "+ seconds);
+        stmt.setQueryTimeout(seconds);
+    }
+
+    @Override
+    public void cancel() throws SQLException {
+        stmt.cancel();
+    }
+
+    @Override
+    public SQLWarning getWarnings() throws SQLException {
+        return stmt.getWarnings();
+    }
+
+    @Override
+    public void clearWarnings() throws SQLException {
+        stmt.clearWarnings();
+    }
+
+    @Override
+    public void setCursorName(String name) throws SQLException {
+        stmt.setCursorName(name);
+    }
+
+    @Override
+    public boolean execute(String sql) throws SQLException {
+        logger.debug(EELFLoggerDelegate.applicationLogger,"execute: "+sql);
+        boolean b = false;
+        //\TODO Add the result of the postStatementHook to b
+        try {
+            mConn.preStatementHook(sql);
+            b = stmt.execute(sql);
+            mConn.postStatementHook(sql);
+            synchronizeTables(sql);
+        } catch (SQLException e) {
+            String nm = e.getClass().getName();
+            logger.error(EELFLoggerDelegate.errorLogger, "execute: exception "+nm+" "+e);
+            // Note: this seems to be the only call Camunda uses, so it is the only one I am fixing for now.
+            boolean ignore = nm.startsWith(DATASTAX_PREFIX);
 //			ignore |= (nm.startsWith("org.h2.jdbc.JdbcSQLException") && e.getMessage().contains("already exists"));
-			if (ignore) {
-				logger.warn("execute: exception (IGNORED) "+nm);
-			} else {
-				logger.error(EELFLoggerDelegate.errorLogger, " Exception "+nm+" "+e);
-				throw e;
-			}
-		}
-		return b;
-	}
-
-	@Override
-	public ResultSet getResultSet() throws SQLException {
-		return stmt.getResultSet();
-	}
-
-	@Override
-	public int getUpdateCount() throws SQLException {
-		return stmt.getUpdateCount();
-	}
-
-	@Override
-	public boolean getMoreResults() throws SQLException {
-		return stmt.getMoreResults();
-	}
-
-	@Override
-	public void setFetchDirection(int direction) throws SQLException {
-		stmt.setFetchDirection(direction);
-	}
-
-	@Override
-	public int getFetchDirection() throws SQLException {
-		return stmt.getFetchDirection();
-	}
-
-	@Override
-	public void setFetchSize(int rows) throws SQLException {
-		stmt.setFetchSize(rows);
-	}
-
-	@Override
-	public int getFetchSize() throws SQLException {
-		return stmt.getFetchSize();
-	}
-
-	@Override
-	public int getResultSetConcurrency() throws SQLException {
-		return stmt.getResultSetConcurrency();
-	}
-
-	@Override
-	public int getResultSetType() throws SQLException {
-		return stmt.getResultSetType();
-	}
-
-	@Override
-	public void addBatch(String sql) throws SQLException {
-		stmt.addBatch(sql);
-	}
-
-	@Override
-	public void clearBatch() throws SQLException {
-		stmt.clearBatch();
-	}
-
-	@Override
-	public int[] executeBatch() throws SQLException {
-		logger.debug(EELFLoggerDelegate.applicationLogger,"executeBatch: ");
-		int[] n = null;
-		try {
-			logger.debug(EELFLoggerDelegate.applicationLogger,"executeBatch() is not supported by MDBC; your results may be incorrect as a result.");
-			n = stmt.executeBatch();
-			synchronizeTables(null);
-		} catch (Exception e) {
-			String nm = e.getClass().getName();
-			logger.error(EELFLoggerDelegate.errorLogger,"executeBatch: exception "+nm);
-			if (!nm.startsWith(DATASTAX_PREFIX))
-				throw e;
-		}
-		return n;
-	}
-
-	@Override
-	public Connection getConnection() throws SQLException {
-		return stmt.getConnection();
-	}
-
-	@Override
-	public boolean getMoreResults(int current) throws SQLException {
-		return stmt.getMoreResults(current);
-	}
-
-	@Override
-	public ResultSet getGeneratedKeys() throws SQLException {
-		return stmt.getGeneratedKeys();
-	}
-
-	@Override
-	public int executeUpdate(String sql, int autoGeneratedKeys) throws SQLException {
-		logger.debug(EELFLoggerDelegate.applicationLogger,"executeUpdate: "+sql);
-		int n = 0;
-		try {
-			mConn.preStatementHook(sql);
-			n = stmt.executeUpdate(sql, autoGeneratedKeys);
-			mConn.postStatementHook(sql);
-			synchronizeTables(sql);
-		} catch (Exception e) {
-			String nm = e.getClass().getName();
-			logger.error(EELFLoggerDelegate.errorLogger,"executeUpdate: exception "+nm);
-			if (!nm.startsWith(DATASTAX_PREFIX))
-				throw e;
-		}
-		return n;
-	}
-
-	@Override
-	public int executeUpdate(String sql, int[] columnIndexes) throws SQLException {
-		logger.debug(EELFLoggerDelegate.applicationLogger,"executeUpdate: "+sql);
-		int n = 0;
-		try {
-			mConn.preStatementHook(sql);
-			n = stmt.executeUpdate(sql, columnIndexes);
-			mConn.postStatementHook(sql);
-			synchronizeTables(sql);
-		} catch (Exception e) {
-			String nm = e.getClass().getName();
-			logger.error(EELFLoggerDelegate.errorLogger,"executeUpdate: exception "+nm);
-			if (!nm.startsWith(DATASTAX_PREFIX))
-				throw e;
-		}
-		return n;
-	}
-
-	@Override
-	public int executeUpdate(String sql, String[] columnNames) throws SQLException {
-		logger.debug(EELFLoggerDelegate.applicationLogger,"executeUpdate: "+sql);
-		int n = 0;
-		try {
-			mConn.preStatementHook(sql);
-			n = stmt.executeUpdate(sql, columnNames);
-			mConn.postStatementHook(sql);
-			synchronizeTables(sql);
-		} catch (Exception e) {
-			String nm = e.getClass().getName();
-			logger.error(EELFLoggerDelegate.errorLogger,"executeUpdate: exception "+nm);
-			if (!nm.startsWith(DATASTAX_PREFIX))
-				throw e;
-		}
-		return n;
-	}
-
-	@Override
-	public boolean execute(String sql, int autoGeneratedKeys) throws SQLException {
-		logger.debug(EELFLoggerDelegate.applicationLogger,"execute: "+sql);
-		boolean b = false;
-		try {
-			mConn.preStatementHook(sql);
-			b = stmt.execute(sql, autoGeneratedKeys);
-			mConn.postStatementHook(sql);
-			synchronizeTables(sql);
-		} catch (Exception e) {
-			String nm = e.getClass().getName();
-			logger.error(EELFLoggerDelegate.errorLogger,"execute: exception "+nm);
-			if (!nm.startsWith(DATASTAX_PREFIX))
-				throw e;
-		}
-		return b;
-	}
-
-	@Override
-	public boolean execute(String sql, int[] columnIndexes) throws SQLException {
-		logger.debug(EELFLoggerDelegate.applicationLogger,"execute: "+sql);
-		boolean b = false;
-		try {
-			mConn.preStatementHook(sql);
-			b = stmt.execute(sql, columnIndexes);
-			mConn.postStatementHook(sql);
-			synchronizeTables(sql);
-		} catch (Exception e) {
-			String nm = e.getClass().getName();
-			logger.error(EELFLoggerDelegate.errorLogger,"execute: exception "+nm);
-			if (!nm.startsWith(DATASTAX_PREFIX))
-				throw e;
-		}
-		return b;
-	}
-
-	@Override
-	public boolean execute(String sql, String[] columnNames) throws SQLException {
-		logger.debug(EELFLoggerDelegate.applicationLogger,"execute: "+sql);
-		//\TODO Idem to the other execute without columnNames
-		boolean b = false;
-		try {
-			mConn.preStatementHook(sql);
-			b = stmt.execute(sql, columnNames);
-			mConn.postStatementHook(sql);
-			synchronizeTables(sql);
-		} catch (Exception e) {
-			String nm = e.getClass().getName();
-			logger.error(EELFLoggerDelegate.errorLogger,"execute: exception "+nm);
-			if (!nm.startsWith(DATASTAX_PREFIX))
-				throw e;
-		}
-		return b;
-	}
-
-	@Override
-	public int getResultSetHoldability() throws SQLException {
-		return stmt.getResultSetHoldability();
-	}
-
-	@Override
-	public boolean isClosed() throws SQLException {
-		return stmt.isClosed();
-	}
-
-	@Override
-	public void setPoolable(boolean poolable) throws SQLException {
-		stmt.setPoolable(poolable);
-	}
-
-	@Override
-	public boolean isPoolable() throws SQLException {
-		return stmt.isPoolable();
-	}
-
-	@Override
-	public void closeOnCompletion() throws SQLException {
-		stmt.closeOnCompletion();
-	}
-
-	@Override
-	public boolean isCloseOnCompletion() throws SQLException {
-		return stmt.isCloseOnCompletion();
-	}
-	
-	protected void synchronizeTables(String sql)  {
-		if (sql == null || sql.trim().toLowerCase().startsWith("create")) {
-			if (mConn != null) {
-				try {
-					mConn.synchronizeTables();
-				} catch (QueryException e) {
-					logger.error(EELFLoggerDelegate.errorLogger, e.getMessage(),AppMessages.UNKNOWNERROR, ErrorSeverity.CRITICAL, ErrorTypes.QUERYERROR);
-				}
-			}
-		}
-	}
+            if (ignore) {
+                logger.warn("execute: exception (IGNORED) "+nm);
+            } else {
+                logger.error(EELFLoggerDelegate.errorLogger, " Exception "+nm+" "+e);
+                throw e;
+            }
+        } catch (MDBCServiceException e) {
+            throw new SQLException(e.getMessage());
+        }
+        return b;
+    }
+
+    @Override
+    public ResultSet getResultSet() throws SQLException {
+        return stmt.getResultSet();
+    }
+
+    @Override
+    public int getUpdateCount() throws SQLException {
+        return stmt.getUpdateCount();
+    }
+
+    @Override
+    public boolean getMoreResults() throws SQLException {
+        return stmt.getMoreResults();
+    }
+
+    @Override
+    public void setFetchDirection(int direction) throws SQLException {
+        stmt.setFetchDirection(direction);
+    }
+
+    @Override
+    public int getFetchDirection() throws SQLException {
+        return stmt.getFetchDirection();
+    }
+
+    @Override
+    public void setFetchSize(int rows) throws SQLException {
+        stmt.setFetchSize(rows);
+    }
+
+    @Override
+    public int getFetchSize() throws SQLException {
+        return stmt.getFetchSize();
+    }
+
+    @Override
+    public int getResultSetConcurrency() throws SQLException {
+        return stmt.getResultSetConcurrency();
+    }
+
+    @Override
+    public int getResultSetType() throws SQLException {
+        return stmt.getResultSetType();
+    }
+
+    @Override
+    public void addBatch(String sql) throws SQLException {
+        stmt.addBatch(sql);
+    }
+
+    @Override
+    public void clearBatch() throws SQLException {
+        stmt.clearBatch();
+    }
+
+    @Override
+    public int[] executeBatch() throws SQLException {
+        logger.debug(EELFLoggerDelegate.applicationLogger,"executeBatch: ");
+        int[] n = null;
+        try {
+            logger.debug(EELFLoggerDelegate.applicationLogger,"executeBatch() is not supported by MDBC; your results may be incorrect as a result.");
+            n = stmt.executeBatch();
+            synchronizeTables(null);
+        } catch (Exception e) {
+            String nm = e.getClass().getName();
+            logger.error(EELFLoggerDelegate.errorLogger,"executeBatch: exception "+nm);
+            if (!nm.startsWith(DATASTAX_PREFIX))
+                throw e;
+        }
+        return n;
+    }
+
+    @Override
+    public Connection getConnection() throws SQLException {
+        return stmt.getConnection();
+    }
+
+    @Override
+    public boolean getMoreResults(int current) throws SQLException {
+        return stmt.getMoreResults(current);
+    }
+
+    @Override
+    public ResultSet getGeneratedKeys() throws SQLException {
+        return stmt.getGeneratedKeys();
+    }
+
+    @Override
+    public int executeUpdate(String sql, int autoGeneratedKeys) throws SQLException {
+        logger.debug(EELFLoggerDelegate.applicationLogger,"executeUpdate: "+sql);
+        int n = 0;
+        try {
+            mConn.preStatementHook(sql);
+            n = stmt.executeUpdate(sql, autoGeneratedKeys);
+            mConn.postStatementHook(sql);
+            synchronizeTables(sql);
+        } catch (SQLException e) {
+            String nm = e.getClass().getName();
+            logger.error(EELFLoggerDelegate.errorLogger,"executeUpdate: exception "+nm);
+            if (!nm.startsWith(DATASTAX_PREFIX))
+                throw e;
+        } catch (MDBCServiceException e) {
+            throw new SQLException(e.getMessage());
+        }
+        return n;
+    }
+
+    @Override
+    public int executeUpdate(String sql, int[] columnIndexes) throws SQLException {
+        logger.debug(EELFLoggerDelegate.applicationLogger,"executeUpdate: "+sql);
+        int n = 0;
+        try {
+            mConn.preStatementHook(sql);
+            n = stmt.executeUpdate(sql, columnIndexes);
+            mConn.postStatementHook(sql);
+            synchronizeTables(sql);
+        } catch (SQLException e) {
+            String nm = e.getClass().getName();
+            logger.error(EELFLoggerDelegate.errorLogger,"executeUpdate: exception "+nm);
+            if (!nm.startsWith(DATASTAX_PREFIX))
+                throw e;
+        } catch (MDBCServiceException e) {
+            throw new SQLException(e.getMessage());
+        }
+        return n;
+    }
+
+    @Override
+    public int executeUpdate(String sql, String[] columnNames) throws SQLException {
+        logger.debug(EELFLoggerDelegate.applicationLogger,"executeUpdate: "+sql);
+        int n = 0;
+        try {
+            mConn.preStatementHook(sql);
+            n = stmt.executeUpdate(sql, columnNames);
+            mConn.postStatementHook(sql);
+            synchronizeTables(sql);
+        } catch (SQLException e) {
+            String nm = e.getClass().getName();
+            logger.error(EELFLoggerDelegate.errorLogger,"executeUpdate: exception "+nm);
+            if (!nm.startsWith(DATASTAX_PREFIX))
+                throw e;
+        } catch (MDBCServiceException e) {
+            throw new SQLException(e.getMessage());
+        }
+        return n;
+    }
+
+    @Override
+    public boolean execute(String sql, int autoGeneratedKeys) throws SQLException {
+        logger.debug(EELFLoggerDelegate.applicationLogger,"execute: "+sql);
+        boolean b = false;
+        try {
+            mConn.preStatementHook(sql);
+            b = stmt.execute(sql, autoGeneratedKeys);
+            mConn.postStatementHook(sql);
+            synchronizeTables(sql);
+        } catch (SQLException e) {
+            String nm = e.getClass().getName();
+            logger.error(EELFLoggerDelegate.errorLogger,"execute: exception "+nm);
+            if (!nm.startsWith(DATASTAX_PREFIX))
+                throw e;
+        } catch (MDBCServiceException e) {
+            throw new SQLException(e.getMessage());
+        }
+        return b;
+    }
+
+    @Override
+    public boolean execute(String sql, int[] columnIndexes) throws SQLException {
+        logger.debug(EELFLoggerDelegate.applicationLogger,"execute: "+sql);
+        boolean b = false;
+        try {
+            mConn.preStatementHook(sql);
+            b = stmt.execute(sql, columnIndexes);
+            mConn.postStatementHook(sql);
+            synchronizeTables(sql);
+        } catch (SQLException e) {
+            String nm = e.getClass().getName();
+            logger.error(EELFLoggerDelegate.errorLogger,"execute: exception "+nm);
+            if (!nm.startsWith(DATASTAX_PREFIX))
+                throw e;
+        } catch (MDBCServiceException e) {
+            throw new SQLException(e.getMessage());
+        }
+        return b;
+    }
+
+    @Override
+    public boolean execute(String sql, String[] columnNames) throws SQLException {
+        logger.debug(EELFLoggerDelegate.applicationLogger,"execute: "+sql);
+        //\TODO Idem to the other execute without columnNames
+        boolean b = false;
+        try {
+            mConn.preStatementHook(sql);
+            b = stmt.execute(sql, columnNames);
+            mConn.postStatementHook(sql);
+            synchronizeTables(sql);
+        } catch (SQLException e) {
+            String nm = e.getClass().getName();
+            logger.error(EELFLoggerDelegate.errorLogger,"execute: exception "+nm);
+            if (!nm.startsWith(DATASTAX_PREFIX))
+                throw e;
+        } catch (MDBCServiceException e) {
+            throw new SQLException(e.getMessage());
+        }
+        return b;
+    }
+
+    @Override
+    public int getResultSetHoldability() throws SQLException {
+        return stmt.getResultSetHoldability();
+    }
+
+    @Override
+    public boolean isClosed() throws SQLException {
+        return stmt.isClosed();
+    }
+
+    @Override
+    public void setPoolable(boolean poolable) throws SQLException {
+        stmt.setPoolable(poolable);
+    }
+
+    @Override
+    public boolean isPoolable() throws SQLException {
+        return stmt.isPoolable();
+    }
+
+    @Override
+    public void closeOnCompletion() throws SQLException {
+        stmt.closeOnCompletion();
+    }
+
+    @Override
+    public boolean isCloseOnCompletion() throws SQLException {
+        return stmt.isCloseOnCompletion();
+    }
+
+    protected void synchronizeTables(String sql)  {
+        if (sql == null || sql.trim().toLowerCase().startsWith("create")) {
+            if (mConn != null) {
+                try {
+                    mConn.synchronizeTables();
+                } catch (QueryException e) {
+                    logger.error(EELFLoggerDelegate.errorLogger, e.getMessage(),AppMessages.UNKNOWNERROR, ErrorSeverity.CRITICAL, ErrorTypes.QUERYERROR);
+                }
+            }
+        }
+    }
 }
diff --git a/mdbc-server/src/main/java/org/onap/music/mdbc/ProxyStatement.java b/mdbc-server/src/main/java/org/onap/music/mdbc/ProxyStatement.java
index 3175f94..059793d 100755
--- a/mdbc-server/src/main/java/org/onap/music/mdbc/ProxyStatement.java
+++ b/mdbc-server/src/main/java/org/onap/music/mdbc/ProxyStatement.java
@@ -45,9 +45,9 @@ import java.sql.Timestamp;
 import java.util.Calendar;
 import java.util.Map;
 
-import org.apache.log4j.Logger;
-
+import org.onap.music.exceptions.MDBCServiceException;
 import org.onap.music.exceptions.QueryException;
+import org.onap.music.logging.EELFLoggerDelegate;
 
 /**
  * ProxyStatement is a proxy Statement that front ends Statements from the underlying JDBC driver.  It passes all operations through,
@@ -56,7 +56,7 @@ import org.onap.music.exceptions.QueryException;
  * @author Robert Eby
  */
 public class ProxyStatement implements CallableStatement {
-	private static final Logger logger = Logger.getLogger(ProxyStatement.class);
+	private EELFLoggerDelegate logger = EELFLoggerDelegate.getLogger(ProxyStatement.class);
 	private static final String DATASTAX_PREFIX = "com.datastax.driver";
 
 	private final Statement stmt;		// the Statement that we are proxying
@@ -86,12 +86,15 @@ public class ProxyStatement implements CallableStatement {
 			r = stmt.executeQuery(sql);
 			mConn.postStatementHook(sql);
 			synchronizeTables(sql);
-		} catch (Exception e) {
+		} catch (SQLException e) {
 			String nm = e.getClass().getName();
 			logger.warn("executeQuery: exception "+nm);
 			if (!nm.startsWith(DATASTAX_PREFIX))
 				throw e;
+		} catch (MDBCServiceException e) {
+		    throw new SQLException(e.getMessage());
 		}
+
 		return r;
 	}
 
@@ -104,11 +107,13 @@ public class ProxyStatement implements CallableStatement {
 			n = stmt.executeUpdate(sql);
 			mConn.postStatementHook(sql);
 			synchronizeTables(sql);
-		} catch (Exception e) {
+		} catch (SQLException e) {
 			String nm = e.getClass().getName();
 			logger.warn("executeUpdate: exception "+nm);
 			if (!nm.startsWith(DATASTAX_PREFIX))
 				throw e;
+        } catch (MDBCServiceException e) {
+		    throw new SQLException(e.getMessage());
 		}
 		return n;
 	}
@@ -182,7 +187,7 @@ public class ProxyStatement implements CallableStatement {
 			b = stmt.execute(sql);
 			mConn.postStatementHook(sql);
 			synchronizeTables(sql);
-		} catch (Exception e) {
+		} catch (SQLException e) {
 			String nm = e.getClass().getName();
 			// Note: this seems to be the only call Camunda uses, so it is the only one I am fixing for now.
 			boolean ignore = nm.startsWith(DATASTAX_PREFIX);
@@ -193,6 +198,8 @@ public class ProxyStatement implements CallableStatement {
 				logger.warn("execute: exception "+nm);
 				throw e;
 			}
+        } catch (MDBCServiceException e) {
+		    throw new SQLException(e.getMessage());
 		}
 		return b;
 	}
@@ -256,16 +263,18 @@ public class ProxyStatement implements CallableStatement {
 	public int[] executeBatch() throws SQLException {
 		logger.debug("executeBatch");
 		int[] n = null;
+		//\TODO check if this is still invalid in Metric
 		try {
 			logger.warn("executeBatch() is not supported by MDBC; your results may be incorrect as a result.");
 			n = stmt.executeBatch();
 			synchronizeTables(null);
-		} catch (Exception e) {
+		} catch (SQLException e) {
 			String nm = e.getClass().getName();
 			logger.warn("executeBatch: exception "+nm);
 			if (!nm.startsWith(DATASTAX_PREFIX))
 				throw e;
-		}
+        }
+
 		return n;
 	}
 
@@ -293,11 +302,13 @@ public class ProxyStatement implements CallableStatement {
 			n = stmt.executeUpdate(sql, autoGeneratedKeys);
 			mConn.postStatementHook(sql);
 			synchronizeTables(sql);
-		} catch (Exception e) {
+		} catch (SQLException e) {
 			String nm = e.getClass().getName();
 			logger.warn("executeUpdate: exception "+nm);
 			if (!nm.startsWith(DATASTAX_PREFIX))
 				throw e;
+		}catch (MDBCServiceException e) {
+		    throw new SQLException(e.getMessage());
 		}
 		return n;
 	}
@@ -311,11 +322,13 @@ public class ProxyStatement implements CallableStatement {
 			n = stmt.executeUpdate(sql, columnIndexes);
 			mConn.postStatementHook(sql);
 			synchronizeTables(sql);
-		} catch (Exception e) {
+		} catch (SQLException e) {
 			String nm = e.getClass().getName();
 			logger.warn("executeUpdate: exception "+nm);
 			if (!nm.startsWith(DATASTAX_PREFIX))
 				throw e;
+		}catch (MDBCServiceException e) {
+		    throw new SQLException(e.getMessage());
 		}
 		return n;
 	}
@@ -329,11 +342,13 @@ public class ProxyStatement implements CallableStatement {
 			n = stmt.executeUpdate(sql, columnNames);
 			mConn.postStatementHook(sql);
 			synchronizeTables(sql);
-		} catch (Exception e) {
+		} catch (SQLException e) {
 			String nm = e.getClass().getName();
 			logger.warn("executeUpdate: exception "+nm);
 			if (!nm.startsWith(DATASTAX_PREFIX))
 				throw e;
+		}catch (MDBCServiceException e) {
+		    throw new SQLException(e.getMessage());
 		}
 		return n;
 	}
@@ -347,11 +362,13 @@ public class ProxyStatement implements CallableStatement {
 			b = stmt.execute(sql, autoGeneratedKeys);
 			mConn.postStatementHook(sql);
 			synchronizeTables(sql);
-		} catch (Exception e) {
+		} catch (SQLException e) {
 			String nm = e.getClass().getName();
 			logger.warn("execute: exception "+nm);
 			if (!nm.startsWith(DATASTAX_PREFIX))
 				throw e;
+		}catch (MDBCServiceException e) {
+		    throw new SQLException(e.getMessage());
 		}
 		return b;
 	}
@@ -365,11 +382,13 @@ public class ProxyStatement implements CallableStatement {
 			b = stmt.execute(sql, columnIndexes);
 			mConn.postStatementHook(sql);
 			synchronizeTables(sql);
-		} catch (Exception e) {
+		} catch (SQLException e) {
 			String nm = e.getClass().getName();
 			logger.warn("execute: exception "+nm);
 			if (!nm.startsWith(DATASTAX_PREFIX))
 				throw e;
+		}catch (MDBCServiceException e) {
+		    throw new SQLException(e.getMessage());
 		}
 		return b;
 	}
@@ -383,11 +402,13 @@ public class ProxyStatement implements CallableStatement {
 			b = stmt.execute(sql, columnNames);
 			mConn.postStatementHook(sql);
 			synchronizeTables(sql);
-		} catch (Exception e) {
+		} catch (SQLException e) {
 			String nm = e.getClass().getName();
 			logger.warn("execute: exception "+nm);
 			if (!nm.startsWith(DATASTAX_PREFIX))
 				throw e;
+		}catch (MDBCServiceException e) {
+		    throw new SQLException(e.getMessage());
 		}
 		return b;
 	}
diff --git a/mdbc-server/src/main/java/org/onap/music/mdbc/Range.java b/mdbc-server/src/main/java/org/onap/music/mdbc/Range.java
index e182368..4bccbba 100755
--- a/mdbc-server/src/main/java/org/onap/music/mdbc/Range.java
+++ b/mdbc-server/src/main/java/org/onap/music/mdbc/Range.java
@@ -29,11 +29,11 @@ import java.util.Objects;
  * In the future we may decide to partition ranges differently
  * @author Enrique Saurez 
  */
-public class Range implements Serializable {
+public class Range implements Serializable, Cloneable{
 
 	private static final long serialVersionUID = 1610744496930800088L;
 
-	final public String table;
+	public String table;
 
 	public Range(String table) {
 		this.table = table;
@@ -58,8 +58,22 @@ public class Range implements Serializable {
 	public int hashCode(){
 		return Objects.hash(table);
 	}
-	
+
+	@Override
+    protected Range clone() {
+	    Range newRange = null;
+	    try{
+            newRange = (Range) super.clone();
+            newRange.table = this.table;
+        }
+        catch(CloneNotSupportedException cns){
+	        //\TODO add logging
+        }
+        return newRange;
+
+    }
 	public boolean overlaps(Range other) {
-		return table == other.table;
+		return table.equals(other.table);
 	}
+
 }
diff --git a/mdbc-server/src/main/java/org/onap/music/mdbc/StateManager.java b/mdbc-server/src/main/java/org/onap/music/mdbc/StateManager.java
index c13fe16..f281548 100755
--- a/mdbc-server/src/main/java/org/onap/music/mdbc/StateManager.java
+++ b/mdbc-server/src/main/java/org/onap/music/mdbc/StateManager.java
@@ -19,8 +19,9 @@
  */
 package org.onap.music.mdbc;
 
+import java.util.ArrayList;
+import java.util.List;
 import org.onap.music.exceptions.MDBCServiceException;
-import org.onap.music.exceptions.MusicServiceException;
 import org.onap.music.logging.EELFLoggerDelegate;
 import org.onap.music.logging.format.AppMessages;
 import org.onap.music.logging.format.ErrorSeverity;
@@ -71,16 +72,16 @@ public class StateManager {
     
     /** Identifier for this server instance */
     private String mdbcServerName;
+    private Map<String,DatabasePartition> connectionRanges;//Each connection owns its own database partition
     
-    @SuppressWarnings("unused")
-	private DatabasePartition ranges;
 
-	public StateManager(String sqlDBUrl, Properties info, DatabasePartition ranges, String mdbcServerName, String sqlDBName) throws MDBCServiceException {
+	public StateManager(String sqlDBUrl, Properties info, String mdbcServerName, String sqlDBName) throws MDBCServiceException {
         this.sqlDBName = sqlDBName;
-        this.ranges = ranges;
         this.sqlDBUrl = sqlDBUrl;
         this.info = info;
         this.mdbcServerName = mdbcServerName;
+    
+        this.connectionRanges = new HashMap<>();
         this.transactionInfo = new TxCommitProgress();
         //\fixme this might not be used, delete?
         try {
@@ -102,9 +103,7 @@ public class StateManager {
     }
 
     /**
-     * Initialize the connections to music, set up any necessary tables in music
-     * @param mixin
-     * @param cassandraUrl
+     * Initialize all the  interfaces and datastructures
      * @throws MDBCServiceException
      */
     protected void initMusic() throws MDBCServiceException {
@@ -118,7 +117,8 @@ public class StateManager {
             Class.forName("org.mariadb.jdbc.Driver");
         }
         catch (ClassNotFoundException e) {
-            logger.error(EELFLoggerDelegate.errorLogger, e.getMessage(),AppMessages.UNKNOWNERROR, ErrorSeverity.CRITICAL, ErrorTypes.GENERALSERVICEERROR);
+            logger.error(EELFLoggerDelegate.errorLogger, e.getMessage(),AppMessages.UNKNOWNERROR, ErrorSeverity.CRITICAL,
+                    ErrorTypes.GENERALSERVICEERROR);
             return;
         }
         try {
@@ -129,7 +129,8 @@ public class StateManager {
             Statement stmt = sqlConnection.createStatement();
             stmt.execute(sql.toString());
         } catch (SQLException e) {
-            logger.error(EELFLoggerDelegate.errorLogger, e.getMessage(),AppMessages.UNKNOWNERROR, ErrorSeverity.CRITICAL, ErrorTypes.GENERALSERVICEERROR);
+            logger.error(EELFLoggerDelegate.errorLogger, e.getMessage(),AppMessages.UNKNOWNERROR, ErrorSeverity.CRITICAL,
+                    ErrorTypes.GENERALSERVICEERROR);
             throw new MDBCServiceException(e.getMessage());
         }
     }
@@ -138,15 +139,11 @@ public class StateManager {
     	return this.musicInterface;
     }
     
-    public DatabasePartition getRanges() {
-		return ranges;
+    public List<DatabasePartition> getRanges() {
+        return new ArrayList<>(connectionRanges.values());
 	}
 
-	public void setRanges(DatabasePartition ranges) {
-		this.ranges = ranges;
-	}
-    
-    
+
     public void closeConnection(String connectionId){
         //\TODO check if there is a race condition
         if(mdbcConnections.containsKey(connectionId)) {
@@ -156,10 +153,15 @@ public class StateManager {
                 if(conn!=null)
                     conn.close();
             } catch (SQLException e) {
-                logger.error(EELFLoggerDelegate.errorLogger, e.getMessage(),AppMessages.UNKNOWNERROR, ErrorSeverity.CRITICAL, ErrorTypes.GENERALSERVICEERROR);
+                logger.error(EELFLoggerDelegate.errorLogger, e.getMessage(),AppMessages.UNKNOWNERROR, ErrorSeverity.CRITICAL,
+                        ErrorTypes.GENERALSERVICEERROR);
             }
             mdbcConnections.remove(connectionId);
         }
+        if(connectionRanges.containsKey(connectionId)){
+            //TODO release lock?
+            connectionRanges.remove(connectionId);
+        }
     }
 
     /**
@@ -179,20 +181,34 @@ public class StateManager {
            }
            catch (ClassNotFoundException e) {
                // TODO Auto-generated catch block
-               logger.error(EELFLoggerDelegate.errorLogger, e.getMessage(),AppMessages.UNKNOWNERROR, ErrorSeverity.CRITICAL, ErrorTypes.GENERALSERVICEERROR);
+               logger.error(EELFLoggerDelegate.errorLogger, e.getMessage(),AppMessages.UNKNOWNERROR, ErrorSeverity.CRITICAL,
+                            ErrorTypes.GENERALSERVICEERROR);
                return;
            }
            try {
                sqlConnection = DriverManager.getConnection(this.sqlDBUrl+"/"+this.sqlDBName, this.info);
            } catch (SQLException e) {
-               logger.error(EELFLoggerDelegate.errorLogger, e.getMessage(),AppMessages.QUERYERROR, ErrorSeverity.CRITICAL, ErrorTypes.QUERYERROR);
+               logger.error(EELFLoggerDelegate.errorLogger, e.getMessage(),AppMessages.QUERYERROR, ErrorSeverity.CRITICAL,
+                       ErrorTypes.QUERYERROR);
                sqlConnection = null;
            }
+           //check if a range was already created for this connection
+           //TODO: later we could try to match it to some more sticky client id
+           DatabasePartition ranges;
+           if(connectionRanges.containsKey(id)){
+              ranges=connectionRanges.get(id);
+           }
+           else{
+              ranges=new DatabasePartition();
+              connectionRanges.put(id,ranges);
+           }
            //Create MDBC connection
            try {
-               newConnection = new MdbcConnection(id, this.sqlDBUrl+"/"+this.sqlDBName, sqlConnection, info, this.musicInterface, transactionInfo,ranges);
+               newConnection = new MdbcConnection(id, this.sqlDBUrl+"/"+this.sqlDBName, sqlConnection, info, this.musicInterface,
+                   transactionInfo,ranges);
            } catch (MDBCServiceException e) {
-               logger.error(EELFLoggerDelegate.errorLogger, e.getMessage(),AppMessages.UNKNOWNERROR, ErrorSeverity.CRITICAL, ErrorTypes.QUERYERROR);
+               logger.error(EELFLoggerDelegate.errorLogger, e.getMessage(),AppMessages.UNKNOWNERROR, ErrorSeverity.CRITICAL,
+                       ErrorTypes.QUERYERROR);
                newConnection = null;
                return;
            }
@@ -227,7 +243,8 @@ public class StateManager {
         }
         catch (ClassNotFoundException e) {
             // TODO Auto-generated catch block
-            logger.error(EELFLoggerDelegate.errorLogger, e.getMessage(),AppMessages.QUERYERROR, ErrorSeverity.CRITICAL, ErrorTypes.QUERYERROR);
+            logger.error(EELFLoggerDelegate.errorLogger, e.getMessage(),AppMessages.QUERYERROR, ErrorSeverity.CRITICAL,
+                    ErrorTypes.QUERYERROR);
         }
 
         //Create connection to local SQL DB
@@ -235,14 +252,27 @@ public class StateManager {
 			sqlConnection = DriverManager.getConnection(this.sqlDBUrl+"/"+this.sqlDBName, this.info);
 		} catch (SQLException e) {
 		    logger.error("sql connection was not created correctly");
-			logger.error(EELFLoggerDelegate.errorLogger, e.getMessage(),AppMessages.QUERYERROR, ErrorSeverity.CRITICAL, ErrorTypes.QUERYERROR);
+			logger.error(EELFLoggerDelegate.errorLogger, e.getMessage(),AppMessages.QUERYERROR, ErrorSeverity.CRITICAL,
+                    ErrorTypes.QUERYERROR);
 			sqlConnection = null;
 		}
+		//check if a range was already created for this connection
+        //TODO: later we could try to match it to some more sticky client id
+        DatabasePartition ranges;
+        if(connectionRanges.containsKey(id)){
+            ranges=connectionRanges.get(id);
+        }
+        else{
+            ranges=new DatabasePartition();
+            connectionRanges.put(id,ranges);
+        }
 		//Create MDBC connection
     	try {
-			newConnection = new MdbcConnection(id,this.sqlDBUrl+"/"+this.sqlDBName, sqlConnection, info, this.musicInterface, transactionInfo,ranges);
+			newConnection = new MdbcConnection(id,this.sqlDBUrl+"/"+this.sqlDBName, sqlConnection, info, this.musicInterface,
+                transactionInfo,ranges);
 		} catch (MDBCServiceException e) {
-			logger.error(EELFLoggerDelegate.errorLogger, e.getMessage(),AppMessages.UNKNOWNERROR, ErrorSeverity.CRITICAL, ErrorTypes.QUERYERROR);
+			logger.error(EELFLoggerDelegate.errorLogger, e.getMessage(),AppMessages.UNKNOWNERROR, ErrorSeverity.CRITICAL,
+                    ErrorTypes.QUERYERROR);
 			newConnection = null;
 		}
 		logger.info(EELFLoggerDelegate.applicationLogger,"Connection created for connection: "+id);
diff --git a/mdbc-server/src/main/java/org/onap/music/mdbc/mixins/DBInterface.java b/mdbc-server/src/main/java/org/onap/music/mdbc/mixins/DBInterface.java
index 73622b1..383b4b3 100755
--- a/mdbc-server/src/main/java/org/onap/music/mdbc/mixins/DBInterface.java
+++ b/mdbc-server/src/main/java/org/onap/music/mdbc/mixins/DBInterface.java
@@ -111,11 +111,13 @@ public interface DBInterface {
 	List<String> getReservedTblNames();
 	
 	String getPrimaryKey(String sql, String tableName);
-	
+
+	String applyDigest(Map<Range,StagingTable> digest);
+
 	/**
 	 * Replay a given TxDigest into the local DB
 	 * @param digest
 	 * @throws SQLException if replay cannot occur correctly
 	 */
-	public void replayTransaction(HashMap<Range,StagingTable> digest) throws SQLException;
+	void replayTransaction(HashMap<Range,StagingTable> digest) throws SQLException;
 }
diff --git a/mdbc-server/src/main/java/org/onap/music/mdbc/mixins/MusicInterface.java b/mdbc-server/src/main/java/org/onap/music/mdbc/mixins/MusicInterface.java
index f4231d8..64e9253 100755
--- a/mdbc-server/src/main/java/org/onap/music/mdbc/mixins/MusicInterface.java
+++ b/mdbc-server/src/main/java/org/onap/music/mdbc/mixins/MusicInterface.java
@@ -28,12 +28,12 @@ import org.json.JSONObject;
 
 import org.onap.music.exceptions.MDBCServiceException;
 import org.onap.music.exceptions.MusicServiceException;
+import org.onap.music.exceptions.MusicLockingException;
 import org.onap.music.mdbc.DatabasePartition;
 import org.onap.music.mdbc.Range;
 import org.onap.music.mdbc.TableInfo;
 import org.onap.music.mdbc.tables.MusicTxDigestId;
 import org.onap.music.mdbc.tables.StagingTable;
-import org.onap.music.mdbc.tables.MriReference;
 import org.onap.music.mdbc.tables.MusicRangeInformationRow;
 import org.onap.music.mdbc.tables.TxCommitProgress;
 
@@ -42,7 +42,26 @@ import org.onap.music.mdbc.tables.TxCommitProgress;
  *
  * @author Robert P. Eby
  */
-public interface MusicInterface {	
+public interface MusicInterface {
+	class OwnershipReturn{
+		private final String ownerId;
+		private final UUID rangeId;
+		private List<UUID> oldIds;
+		public OwnershipReturn(String ownerId, UUID rangeId, List<UUID> oldIds){
+			this.ownerId=ownerId;
+			this.rangeId=rangeId;
+			this.oldIds=oldIds;
+		}
+		public String getOwnerId(){
+		    return ownerId;
+        }
+        public UUID getRangeId(){
+		    return rangeId;
+        }
+        public List<UUID> getOldIRangeds(){
+            return oldIds;
+        }
+	}
 	/**
 	 * Get the name of this MusicInterface mixin object.
 	 * @return the name
@@ -57,7 +76,7 @@ public interface MusicInterface {
 	 * generates a key or placeholder for what is required for a primary key
 	 * @return a primary key
 	 */
-	String generateUniqueKey();
+	UUID generateUniqueKey();
 
 	/**
 	 * Find the key used with Music for a table that was created without a primary index
@@ -68,7 +87,8 @@ public interface MusicInterface {
 	 * @param dbRow row obtained from the SQL layer
 	 * @return key associated with the row
 	 */
-	String getMusicKeyFromRowWithoutPrimaryIndexes(TableInfo ti, String table, JSONObject dbRow);
+	String getMusicKeyFromRowWithoutPrimaryIndexes(TableInfo ti, String table, JSONObject dbRow)
+	;
 	/**
 	 * Do what is needed to close down the MUSIC connection.
 	 */
@@ -157,30 +177,98 @@ public interface MusicInterface {
 	/**
 	 * Commits the corresponding REDO-log into MUSIC
 	 *
-	 * @param partition
-	 * @param transactionDigest digest of the transaction that is being committed into the Redo log in music. It has to be a HashMap, because it is required to be serializable
+	 * @param partition information related to ownership of partitions, used to verify ownership when commiting the Tx
+	 * @param transactionDigest digest of the transaction that is being committed into the Redo log in music. It has to
+     * be a HashMap, because it is required to be serializable
 	 * @param txId id associated with the log being send
 	 * @param progressKeeper data structure that is used to handle to detect failures, and know what to do
 	 * @throws MDBCServiceException
 	 */
 	void commitLog(DatabasePartition partition, HashMap<Range,StagingTable> transactionDigest, String txId,TxCommitProgress progressKeeper) throws MDBCServiceException;
 	
+
+    /**
+     * This function is used to obtain the information related to a specific row in the MRI table
+     * @param partitionIndex index of the row that is going to be retrieved
+     * @return all the information related to the table
+     * @throws MDBCServiceException
+     */
 	MusicRangeInformationRow getMusicRangeInformation(UUID partitionIndex) throws MDBCServiceException;
 
+    /**
+     * This function is used to create a new row in the MRI table
+     * @param info the information used to create the row
+     * @return the new partition object that contain the new information used to create the row
+     * @throws MDBCServiceException
+     */
 	DatabasePartition createMusicRangeInformation(MusicRangeInformationRow info) throws MDBCServiceException;
-	
+
+    /**
+     * This function is used to append an index to the redo log in a MRI row
+     * @param mriRowId mri row index to which we are going to append the index to the redo log
+     * @param partition information related to ownership of partitions, used to verify ownership
+     * @param newRecord index of the new record to be appended to the redo log
+     * @throws MDBCServiceException
+     */
 	void appendToRedoLog(UUID mriRowId, DatabasePartition partition, MusicTxDigestId newRecord) throws MDBCServiceException;
-	
+
+    /**
+     * This functions adds the tx digest to
+     * @param newId id used as index in the MTD table
+     * @param transactionDigest digest that contains all the changes performed in the transaction
+     * @throws MDBCServiceException
+     */
 	void addTxDigest(MusicTxDigestId newId, String transactionDigest) throws MDBCServiceException;
 
+    /**
+     * Function used to retrieve a given transaction digest and deserialize it
+     * @param id of the transaction digest to be retrieved
+     * @return the deserialize transaction digest that can be applied to the local SQL database
+     * @throws MDBCServiceException
+     */
 	HashMap<Range,StagingTable> getTxDigest(MusicTxDigestId id) throws MDBCServiceException;
-	
-	void own(List<Range> ranges);
 
-	void appendRange(String rangeId, List<Range> ranges);
+    /**
+     * Use this functions to verify ownership, and own new ranges
+     * @param ranges the ranges that should be own after calling this function
+     * @param partition current information of the ownership in the system
+     * @return an object indicating the status of the own function result
+     * @throws MDBCServiceException
+     */
+	OwnershipReturn own(List<Range> ranges, DatabasePartition partition) throws MDBCServiceException;
+
+    /**
+     * This function relinquish ownership, if it is time to do it, it should be used at the end of a commit operation
+     * @param partition information of the partition that is currently being owned
+     * @throws MDBCServiceException
+     */
+	void relinquishIfRequired(DatabasePartition partition) throws MDBCServiceException;
+
+    /**
+     * This function is in charge of owning all the ranges requested and creating a new row that show the ownership of all
+     * those ranges.
+     * @param rangeId new id to be used in the new row
+     * @param ranges ranges to be owned by the end of the function called
+     * @param partition current ownership status
+     * @return
+     * @throws MDBCServiceException
+     */
+	OwnershipReturn appendRange(String rangeId, List<Range> ranges, DatabasePartition partition) throws MDBCServiceException;
+
+    /**
+     * This functions relinquishes a range
+     * @param ownerId id of the current ownerh
+     * @param rangeId id of the range to be relinquished
+     * @throws MusicLockingException
+     */
+	void relinquish(String ownerId, String rangeId) throws MDBCServiceException;
 
-	void relinquish(String ownerId, String rangeId);
-	public List<UUID> getPartitionIndexes();
+    /**
+     * This function return all the range indexes that are currently hold by any of the connections in the system
+     * @return list of ids of rows in MRI
+     */
+	List<UUID> getPartitionIndexes() throws MDBCServiceException;
 
+	void replayTransaction(HashMap<Range,StagingTable> digest) throws MDBCServiceException;
 }
 
diff --git a/mdbc-server/src/main/java/org/onap/music/mdbc/mixins/MusicMixin.java b/mdbc-server/src/main/java/org/onap/music/mdbc/mixins/MusicMixin.java
index 8ffb6af..7228b55 100755
--- a/mdbc-server/src/main/java/org/onap/music/mdbc/mixins/MusicMixin.java
+++ b/mdbc-server/src/main/java/org/onap/music/mdbc/mixins/MusicMixin.java
@@ -7,9 +7,9 @@
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
- * 
+ *
  *      http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -27,19 +27,21 @@ import java.util.ArrayList;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.HashSet;
+import java.util.Iterator;
+import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 import java.util.Properties;
+import java.util.Random;
 import java.util.Set;
 import java.util.TreeSet;
 import java.util.UUID;
 
+import org.apache.commons.lang.NotImplementedException;
 import org.onap.music.mdbc.*;
 import org.onap.music.mdbc.tables.MusicTxDigestId;
 import org.onap.music.mdbc.tables.StagingTable;
-import org.onap.music.mdbc.tables.MriReference;
 import org.onap.music.mdbc.tables.MusicRangeInformationRow;
-import org.onap.music.mdbc.tables.MusicTxDigest;
 import org.onap.music.mdbc.tables.TxCommitProgress;
 
 import org.json.JSONObject;
@@ -49,7 +51,6 @@ import org.onap.music.exceptions.MusicLockingException;
 import org.onap.music.exceptions.MusicQueryException;
 import org.onap.music.exceptions.MusicServiceException;
 import org.onap.music.main.MusicCore;
-import org.onap.music.main.MusicCore.Condition;
 import org.onap.music.main.ResultType;
 import org.onap.music.main.ReturnType;
 
@@ -84,104 +85,131 @@ import com.datastax.driver.core.TupleValue;
  * @author Robert P. Eby
  */
 public class MusicMixin implements MusicInterface {
-	/** The property name to use to identify this replica to MusicSqlManager */
-	public static final String KEY_MY_ID              = "myid";
-	/** The property name to use for the comma-separated list of replica IDs. */
-	public static final String KEY_REPLICAS           = "replica_ids";
-	/** The property name to use to identify the IP address for Cassandra. */
-	public static final String KEY_MUSIC_ADDRESS      = "cassandra.host";
-	/** The property name to use to provide the replication factor for Cassandra. */
-	public static final String KEY_MUSIC_RFACTOR      = "music_rfactor";
-	/** The property name to use to provide the replication factor for Cassandra. */
-	public static final String KEY_MUSIC_NAMESPACE = "music_namespace";
-	/** Namespace for the tables in MUSIC (Cassandra) */
-	public static final String DEFAULT_MUSIC_NAMESPACE = "namespace";
-	/** The default property value to use for the Cassandra IP address. */
-	public static final String DEFAULT_MUSIC_ADDRESS  = "localhost";
-	/** The default property value to use for the Cassandra replication factor. */
-	public static final int    DEFAULT_MUSIC_RFACTOR  = 1;
-	/** The default primary string column, if none is provided. */
-	public static final String MDBC_PRIMARYKEY_NAME = "mdbc_cuid";
-	/** Type of the primary key, if none is defined by the user */
-	public static final String MDBC_PRIMARYKEY_TYPE = "uuid";
-	
-	
-	//\TODO Add logic to change the names when required and create the tables when necessary
+    /** The property name to use to identify this replica to MusicSqlManager */
+    public static final String KEY_MY_ID              = "myid";
+    /** The property name to use for the comma-separated list of replica IDs. */
+    public static final String KEY_REPLICAS           = "replica_ids";
+    /** The property name to use to identify the IP address for Cassandra. */
+    public static final String KEY_MUSIC_ADDRESS      = "cassandra.host";
+    /** The property name to use to provide the replication factor for Cassandra. */
+    public static final String KEY_MUSIC_RFACTOR      = "music_rfactor";
+    /** The property name to use to provide the replication factor for Cassandra. */
+    public static final String KEY_MUSIC_NAMESPACE = "music_namespace";
+    /** Namespace for the tables in MUSIC (Cassandra) */
+    public static final String DEFAULT_MUSIC_NAMESPACE = "namespace";
+    /** The default property value to use for the Cassandra IP address. */
+    public static final String DEFAULT_MUSIC_ADDRESS  = "localhost";
+    /** The default property value to use for the Cassandra replication factor. */
+    public static final int    DEFAULT_MUSIC_RFACTOR  = 1;
+    /** The default primary string column, if none is provided. */
+    public static final String MDBC_PRIMARYKEY_NAME = "mdbc_cuid";
+    /** Type of the primary key, if none is defined by the user */
+    public static final String MDBC_PRIMARYKEY_TYPE = "uuid";
+
+
+    //\TODO Add logic to change the names when required and create the tables when necessary
     private String musicTxDigestTableName = "musictxdigest";
-	private String musicRangeInformationTableName = "musicrangeinformation";
-
-	private EELFLoggerDelegate logger = EELFLoggerDelegate.getLogger(MusicMixin.class);
-	
-	private static final Map<Integer, String> typemap         = new HashMap<>();
-	static {
-		// We only support the following type mappings currently (from DB -> Cassandra).
-		// Anything else will likely cause a NullPointerException
-		typemap.put(Types.BIGINT,    "BIGINT");	// aka. IDENTITY
-		typemap.put(Types.BLOB,      "VARCHAR");
-		typemap.put(Types.BOOLEAN,   "BOOLEAN");
-		typemap.put(Types.CLOB,      "BLOB");
-		typemap.put(Types.DATE,      "VARCHAR");
-		typemap.put(Types.DOUBLE,    "DOUBLE");
-		typemap.put(Types.DECIMAL,   "DECIMAL");
-		typemap.put(Types.INTEGER,   "INT");
-		//typemap.put(Types.TIMESTAMP, "TIMESTAMP");
-		typemap.put(Types.SMALLINT, "SMALLINT");
-		typemap.put(Types.TIMESTAMP, "VARCHAR");
-		typemap.put(Types.VARBINARY, "BLOB");
-		typemap.put(Types.VARCHAR,   "VARCHAR");
-		typemap.put(Types.CHAR,   	 "VARCHAR");
-		//The "Hacks", these don't have a direct mapping
-		//typemap.put(Types.DATE,   	 "VARCHAR");
-		//typemap.put(Types.DATE,   	 "TIMESTAMP");
-	}
-
-	protected final String music_ns;
-	protected final String myId;
-	protected final String[] allReplicaIds;
-	private final String musicAddress;
-	private final int    music_rfactor;
-	private MusicConnector mCon        = null;
-	private Session musicSession       = null;
-	private boolean keyspace_created   = false;
-	private Map<String, PreparedStatement> ps_cache = new HashMap<>();
-	private Set<String> in_progress    = Collections.synchronizedSet(new HashSet<String>());
-
-	public MusicMixin() {
-		//this.logger         = null;
-		this.musicAddress   = null;
-		this.music_ns       = null;
-		this.music_rfactor  = 0;
-		this.myId           = null;
-		this.allReplicaIds  = null;
-    }
-
-	public MusicMixin(String mdbcServerName, Properties info) throws MDBCServiceException {
-		// Default values -- should be overridden in the Properties
-		// Default to using the host_ids of the various peers as the replica IDs (this is probably preferred)
-		this.musicAddress   = info.getProperty(KEY_MUSIC_ADDRESS, DEFAULT_MUSIC_ADDRESS);
-		logger.info(EELFLoggerDelegate.applicationLogger,"MusicSqlManager: musicAddress="+musicAddress);
-
-		String s            = info.getProperty(KEY_MUSIC_RFACTOR);
-		this.music_rfactor  = (s == null) ? DEFAULT_MUSIC_RFACTOR : Integer.parseInt(s);
-		
-		this.myId           = info.getProperty(KEY_MY_ID,    getMyHostId());
-		logger.info(EELFLoggerDelegate.applicationLogger,"MusicSqlManager: myId="+myId);
+    private String musicRangeInformationTableName = "musicrangeinformation";
+
+    private EELFLoggerDelegate logger = EELFLoggerDelegate.getLogger(MusicMixin.class);
+
+    private class LockResult{
+        private final UUID musicRangeInformationIndex;
+        private final String ownerId;
+        private final boolean newLock;
+        public LockResult(UUID rowId, String ownerId, boolean newLock){
+            this.musicRangeInformationIndex = rowId;
+            this.ownerId=ownerId;
+            this.newLock=newLock;
+        }
+        public String getOwnerId(){
+            return ownerId;
+        }
+        public boolean getNewLock(){
+            return newLock;
+        }
+        public UUID getIndex() {return musicRangeInformationIndex;}
+    }
 
-		
-		this.allReplicaIds  = info.getProperty(KEY_REPLICAS, getAllHostIds()).split(",");
-		logger.info(EELFLoggerDelegate.applicationLogger,"MusicSqlManager: allReplicaIds="+info.getProperty(KEY_REPLICAS, this.myId));
 
-		this.music_ns       = info.getProperty(KEY_MUSIC_NAMESPACE,DEFAULT_MUSIC_NAMESPACE);
-		logger.info(EELFLoggerDelegate.applicationLogger,"MusicSqlManager: music_ns="+music_ns);
-		
-		initializeMetricTables();
+    private static final Map<Integer, String> typemap         = new HashMap<>();
+    static {
+        // We only support the following type mappings currently (from DB -> Cassandra).
+        // Anything else will likely cause a NullPointerException
+        typemap.put(Types.BIGINT,    "BIGINT");	// aka. IDENTITY
+        typemap.put(Types.BLOB,      "VARCHAR");
+        typemap.put(Types.BOOLEAN,   "BOOLEAN");
+        typemap.put(Types.CLOB,      "BLOB");
+        typemap.put(Types.DATE,      "VARCHAR");
+        typemap.put(Types.DOUBLE,    "DOUBLE");
+        typemap.put(Types.DECIMAL,   "DECIMAL");
+        typemap.put(Types.INTEGER,   "INT");
+        //typemap.put(Types.TIMESTAMP, "TIMESTAMP");
+        typemap.put(Types.SMALLINT, "SMALLINT");
+        typemap.put(Types.TIMESTAMP, "VARCHAR");
+        typemap.put(Types.VARBINARY, "BLOB");
+        typemap.put(Types.VARCHAR,   "VARCHAR");
+        typemap.put(Types.CHAR,   	 "VARCHAR");
+        //The "Hacks", these don't have a direct mapping
+        //typemap.put(Types.DATE,   	 "VARCHAR");
+        //typemap.put(Types.DATE,   	 "TIMESTAMP");
+    }
+
+    protected final String music_ns;
+    protected final String myId;
+    protected final String[] allReplicaIds;
+    private final String musicAddress;
+    private final int    music_rfactor;
+    private MusicConnector mCon        = null;
+    private Session musicSession       = null;
+    private boolean keyspace_created   = false;
+    private Map<String, PreparedStatement> ps_cache = new HashMap<>();
+    private Set<String> in_progress    = Collections.synchronizedSet(new HashSet<String>());
+
+    public MusicMixin() {
+        //this.logger         = null;
+        this.musicAddress   = null;
+        this.music_ns       = null;
+        this.music_rfactor  = 0;
+        this.myId           = null;
+        this.allReplicaIds  = null;
+    }
+
+    public MusicMixin(String mdbcServerName, Properties info) throws MDBCServiceException {
+        // Default values -- should be overridden in the Properties
+        // Default to using the host_ids of the various peers as the replica IDs (this is probably preferred)
+        this.musicAddress   = info.getProperty(KEY_MUSIC_ADDRESS, DEFAULT_MUSIC_ADDRESS);
+        logger.info(EELFLoggerDelegate.applicationLogger,"MusicSqlManager: musicAddress="+musicAddress);
+
+        String s            = info.getProperty(KEY_MUSIC_RFACTOR);
+        this.music_rfactor  = (s == null) ? DEFAULT_MUSIC_RFACTOR : Integer.parseInt(s);
+
+        this.myId           = info.getProperty(KEY_MY_ID,    getMyHostId());
+        logger.info(EELFLoggerDelegate.applicationLogger,"MusicSqlManager: myId="+myId);
+
+
+        this.allReplicaIds  = info.getProperty(KEY_REPLICAS, getAllHostIds()).split(",");
+        logger.info(EELFLoggerDelegate.applicationLogger,"MusicSqlManager: allReplicaIds="+info.getProperty(KEY_REPLICAS, this.myId));
+
+        this.music_ns       = info.getProperty(KEY_MUSIC_NAMESPACE,DEFAULT_MUSIC_NAMESPACE);
+        logger.info(EELFLoggerDelegate.applicationLogger,"MusicSqlManager: music_ns="+music_ns);
+
+        initializeMetricTables();
+    }
+
+    public String getMusicTxDigestTableName(){
+        return musicTxDigestTableName;
     }
 
-	/**
-	 * This method creates a keyspace in Music/Cassandra to store the data corresponding to the SQL tables.
-	 * The keyspace name comes from the initialization properties passed to the JDBC driver.
-	 */
-	@Override
+    public String getMusicRangeInformationTableName(){
+        return musicRangeInformationTableName;
+    }
+
+    /**
+     * This method creates a keyspace in Music/Cassandra to store the data corresponding to the SQL tables.
+     * The keyspace name comes from the initialization properties passed to the JDBC driver.
+     */
+    @Override
     public void createKeyspace() throws MDBCServiceException {
 
         Map<String,Object> replicationInfo = new HashMap<>();
@@ -190,202 +218,213 @@ public class MusicMixin implements MusicInterface {
 
         PreparedQueryObject queryObject = new PreparedQueryObject();
         queryObject.appendQueryString(
-                "CREATE KEYSPACE IF NOT EXISTS " + this.music_ns + 
+            "CREATE KEYSPACE IF NOT EXISTS " + this.music_ns +
                 " WITH REPLICATION = " + replicationInfo.toString().replaceAll("=", ":"));
 
         try {
             MusicCore.nonKeyRelatedPut(queryObject, "eventual");
-        } catch (MusicServiceException e) {       	
+        } catch (MusicServiceException e) {
             if (!e.getMessage().equals("Keyspace "+music_ns+" already exists")) {
-            	throw new MDBCServiceException("Error creating namespace: "+music_ns+". Internal error:"+e.getErrorMessage());
+                throw new MDBCServiceException("Error creating namespace: "+music_ns+". Internal error:"+e.getErrorMessage());
+            }
+        }
+    }
+
+    private String getMyHostId() {
+        ResultSet rs = null;
+        try {
+            rs = executeMusicRead("SELECT HOST_ID FROM SYSTEM.LOCAL");
+        } catch (MDBCServiceException e) {
+            return "UNKNOWN";
+        }
+        Row row = rs.one();
+        return (row == null) ? "UNKNOWN" : row.getUUID("HOST_ID").toString();
+    }
+    private String getAllHostIds() {
+        ResultSet results = null;
+        try {
+            results = executeMusicRead("SELECT HOST_ID FROM SYSTEM.PEERS");
+        } catch (MDBCServiceException e) {
+        }
+        StringBuilder sb = new StringBuilder(myId);
+        if(results!=null) {
+            for (Row row : results) {
+                sb.append(",");
+                sb.append(row.getUUID("HOST_ID").toString());
             }
         }
+        return sb.toString();
+    }
+
+    /**
+     * Get the name of this MusicInterface mixin object.
+     * @return the name
+     */
+    @Override
+    public String getMixinName() {
+        return "cassandra";
+    }
+    /**
+     * Do what is needed to close down the MUSIC connection.
+     */
+    @Override
+    public void close() {
+        if (musicSession != null) {
+            musicSession.close();
+            musicSession = null;
+        }
     }
 
-	private String getMyHostId() {
-		ResultSet rs = executeMusicRead("SELECT HOST_ID FROM SYSTEM.LOCAL");
-		Row row = rs.one();
-		return (row == null) ? "UNKNOWN" : row.getUUID("HOST_ID").toString();
-	}
-	private String getAllHostIds() {
-		ResultSet results = executeMusicRead("SELECT HOST_ID FROM SYSTEM.PEERS");
-		StringBuilder sb = new StringBuilder(myId);
-		for (Row row : results) {
-			sb.append(",");
-			sb.append(row.getUUID("HOST_ID").toString());
-		}
-		return sb.toString();
-	}
-
-	/**
-	 * Get the name of this MusicInterface mixin object.
-	 * @return the name
-	 */
-	@Override
-	public String getMixinName() {
-		return "cassandra";
-	}
-	/**
-	 * Do what is needed to close down the MUSIC connection.
-	 */
-	@Override
-	public void close() {
-		if (musicSession != null) {
-			musicSession.close();
-			musicSession = null;
-		}
-	}
-	
-	/**
-	 * This function is used to created all the required data structures, both local  
-	 */
-	private void initializeMetricTables() throws MDBCServiceException {
-		createKeyspace();
-	    try {
+    /**
+     * This function is used to created all the required data structures, both local
+     */
+    private void initializeMetricTables() throws MDBCServiceException {
+        createKeyspace();
+        try {
             createMusicTxDigest();//\TODO If we start partitioning the data base, we would need to use the redotable number
- 			createMusicRangeInformationTable();
-		}
-		catch(MDBCServiceException e){
+            createMusicRangeInformationTable();
+        }
+        catch(MDBCServiceException e){
             logger.error(EELFLoggerDelegate.errorLogger,"Error creating tables in MUSIC");
         }
-	}
-
-	/**
-	 * This method performs all necessary initialization in Music/Cassandra to store the table <i>tableName</i>.
-	 * @param tableName the table to initialize MUSIC for
-	 */
-	@Override
-	public void initializeMusicForTable(TableInfo ti, String tableName) {
-		/**
-		 * This code creates two tables for every table in SQL:
-		 * (i) a table with the exact same name as the SQL table storing the SQL data.
-		 * (ii) a "dirty bits" table that stores the keys in the Cassandra table that are yet to be
-		 * updated in the SQL table (they were written by some other node).
-		 */
-		StringBuilder fields = new StringBuilder();
-		StringBuilder prikey = new StringBuilder();
-		String pfx = "", pfx2 = "";
-		for (int i = 0; i < ti.columns.size(); i++) {
-			fields.append(pfx)
-			      .append(ti.columns.get(i))
-			      .append(" ")
-			      .append(typemap.get(ti.coltype.get(i)));
-			if (ti.iskey.get(i)) {
-				// Primary key column
-				prikey.append(pfx2).append(ti.columns.get(i));
-				pfx2 = ", ";
-			}
-			pfx = ", ";
-		}
-		if (prikey.length()==0) {
-			fields.append(pfx).append(MDBC_PRIMARYKEY_NAME)
-								.append(" ")
-								.append(MDBC_PRIMARYKEY_TYPE);
-			prikey.append(MDBC_PRIMARYKEY_NAME);
-		}
-		String cql = String.format("CREATE TABLE IF NOT EXISTS %s.%s (%s, PRIMARY KEY (%s));", music_ns, tableName, fields.toString(), prikey.toString());
-		executeMusicWriteQuery(cql);
-	}
-
-	// **************************************************
-	// Dirty Tables (in MUSIC) methods
-	// **************************************************
-
-	/**
-	 * Create a <i>dirty row</i> table for the real table <i>tableName</i>.  The primary keys columns from the real table are recreated in
-	 * the dirty table, along with a "REPLICA__" column that names the replica that should update it's internal state from MUSIC.
-	 * @param tableName the table to create a "dirty" table for
-	 */
-	@Override
-	public void createDirtyRowTable(TableInfo ti, String tableName) {
-		// create dirtybitsTable at all replicas
+    }
+
+    /**
+     * This method performs all necessary initialization in Music/Cassandra to store the table <i>tableName</i>.
+     * @param tableName the table to initialize MUSIC for
+     */
+    @Override
+    public void initializeMusicForTable(TableInfo ti, String tableName) {
+        /**
+         * This code creates two tables for every table in SQL:
+         * (i) a table with the exact same name as the SQL table storing the SQL data.
+         * (ii) a "dirty bits" table that stores the keys in the Cassandra table that are yet to be
+         * updated in the SQL table (they were written by some other node).
+         */
+        StringBuilder fields = new StringBuilder();
+        StringBuilder prikey = new StringBuilder();
+        String pfx = "", pfx2 = "";
+        for (int i = 0; i < ti.columns.size(); i++) {
+            fields.append(pfx)
+                .append(ti.columns.get(i))
+                .append(" ")
+                .append(typemap.get(ti.coltype.get(i)));
+            if (ti.iskey.get(i)) {
+                // Primary key column
+                prikey.append(pfx2).append(ti.columns.get(i));
+                pfx2 = ", ";
+            }
+            pfx = ", ";
+        }
+        if (prikey.length()==0) {
+            fields.append(pfx).append(MDBC_PRIMARYKEY_NAME)
+                .append(" ")
+                .append(MDBC_PRIMARYKEY_TYPE);
+            prikey.append(MDBC_PRIMARYKEY_NAME);
+        }
+        String cql = String.format("CREATE TABLE IF NOT EXISTS %s.%s (%s, PRIMARY KEY (%s));", music_ns, tableName, fields.toString(), prikey.toString());
+        executeMusicWriteQuery(cql);
+    }
+
+    // **************************************************
+    // Dirty Tables (in MUSIC) methods
+    // **************************************************
+
+    /**
+     * Create a <i>dirty row</i> table for the real table <i>tableName</i>.  The primary keys columns from the real table are recreated in
+     * the dirty table, along with a "REPLICA__" column that names the replica that should update it's internal state from MUSIC.
+     * @param tableName the table to create a "dirty" table for
+     */
+    @Override
+    public void createDirtyRowTable(TableInfo ti, String tableName) {
+        // create dirtybitsTable at all replicas
 //		for (String repl : allReplicaIds) {
 ////			String dirtyRowsTableName = "dirty_"+tableName+"_"+allReplicaIds[i];
 ////			String dirtyTableQuery = "CREATE TABLE IF NOT EXISTS "+music_ns+"."+ dirtyRowsTableName+" (dirtyRowKeys text PRIMARY KEY);";
 //			cql = String.format("CREATE TABLE IF NOT EXISTS %s.DIRTY_%s_%s (dirtyRowKeys TEXT PRIMARY KEY);", music_ns, tableName, repl);
 //			executeMusicWriteQuery(cql);
 //		}
-		StringBuilder ddl = new StringBuilder("REPLICA__ TEXT");
-		StringBuilder cols = new StringBuilder("REPLICA__");
-		for (int i = 0; i < ti.columns.size(); i++) {
-			if (ti.iskey.get(i)) {
-				// Only use the primary keys columns in the "Dirty" table
-				ddl.append(", ")
-				   .append(ti.columns.get(i))
-				   .append(" ")
-				   .append(typemap.get(ti.coltype.get(i)));
-				cols.append(", ").append(ti.columns.get(i));
-			}
-		}
-		if(cols.length()==0) {
-			//fixme
-			System.err.println("Create dirty row table found no primary key");
-		}
-		ddl.append(", PRIMARY KEY(").append(cols).append(")");
-		String cql = String.format("CREATE TABLE IF NOT EXISTS %s.DIRTY_%s (%s);", music_ns, tableName, ddl.toString());
-		executeMusicWriteQuery(cql);
-	}
-	/**
-	 * Drop the dirty row table for <i>tableName</i> from MUSIC.
-	 * @param tableName the table being dropped
-	 */
-	@Override
-	public void dropDirtyRowTable(String tableName) {
-		String cql = String.format("DROP TABLE %s.DIRTY_%s;", music_ns, tableName);
-		executeMusicWriteQuery(cql);
-	}
-	/**
-	 * Mark rows as "dirty" in the dirty rows table for <i>tableName</i>.  Rows are marked for all replicas but
-	 * this one (this replica already has the up to date data).
-	 * @param tableName the table we are marking dirty
-	 * @param keys an ordered list of the values being put into the table.  The values that correspond to the tables'
-	 * primary key are copied into the dirty row table.
-	 */
-	@Override
-	public void markDirtyRow(TableInfo ti, String tableName, JSONObject keys) {
-		Object[] keyObj = getObjects(ti,tableName, keys);
-		StringBuilder cols = new StringBuilder("REPLICA__");
-		PreparedQueryObject pQueryObject = null;
-		StringBuilder vals = new StringBuilder("?");
-		List<Object> vallist = new ArrayList<Object>();
-		vallist.add(""); // placeholder for replica
-		for (int i = 0; i < ti.columns.size(); i++) {
-			if (ti.iskey.get(i)) {
-				cols.append(", ").append(ti.columns.get(i));
-				vals.append(", ").append("?");
-				vallist.add(keyObj[i]);
-			}
-		}
-		if(cols.length()==0) {
-			//FIXME
-			System.err.println("markDIrtyRow need to fix primary key");
-		}
-		String cql = String.format("INSERT INTO %s.DIRTY_%s (%s) VALUES (%s);", music_ns, tableName, cols.toString(), vals.toString());
+        StringBuilder ddl = new StringBuilder("REPLICA__ TEXT");
+        StringBuilder cols = new StringBuilder("REPLICA__");
+        for (int i = 0; i < ti.columns.size(); i++) {
+            if (ti.iskey.get(i)) {
+                // Only use the primary keys columns in the "Dirty" table
+                ddl.append(", ")
+                    .append(ti.columns.get(i))
+                    .append(" ")
+                    .append(typemap.get(ti.coltype.get(i)));
+                cols.append(", ").append(ti.columns.get(i));
+            }
+        }
+        if(cols.length()==0) {
+            //fixme
+            System.err.println("Create dirty row table found no primary key");
+        }
+        ddl.append(", PRIMARY KEY(").append(cols).append(")");
+        String cql = String.format("CREATE TABLE IF NOT EXISTS %s.DIRTY_%s (%s);", music_ns, tableName, ddl.toString());
+        executeMusicWriteQuery(cql);
+    }
+    /**
+     * Drop the dirty row table for <i>tableName</i> from MUSIC.
+     * @param tableName the table being dropped
+     */
+    @Override
+    public void dropDirtyRowTable(String tableName) {
+        String cql = String.format("DROP TABLE %s.DIRTY_%s;", music_ns, tableName);
+        executeMusicWriteQuery(cql);
+    }
+    /**
+     * Mark rows as "dirty" in the dirty rows table for <i>tableName</i>.  Rows are marked for all replicas but
+     * this one (this replica already has the up to date data).
+     * @param tableName the table we are marking dirty
+     * @param keys an ordered list of the values being put into the table.  The values that correspond to the tables'
+     * primary key are copied into the dirty row table.
+     */
+    @Override
+    public void markDirtyRow(TableInfo ti, String tableName, JSONObject keys) {
+        Object[] keyObj = getObjects(ti,tableName, keys);
+        StringBuilder cols = new StringBuilder("REPLICA__");
+        PreparedQueryObject pQueryObject = null;
+        StringBuilder vals = new StringBuilder("?");
+        List<Object> vallist = new ArrayList<Object>();
+        vallist.add(""); // placeholder for replica
+        for (int i = 0; i < ti.columns.size(); i++) {
+            if (ti.iskey.get(i)) {
+                cols.append(", ").append(ti.columns.get(i));
+                vals.append(", ").append("?");
+                vallist.add(keyObj[i]);
+            }
+        }
+        if(cols.length()==0) {
+            //FIXME
+            System.err.println("markDIrtyRow need to fix primary key");
+        }
+        String cql = String.format("INSERT INTO %s.DIRTY_%s (%s) VALUES (%s);", music_ns, tableName, cols.toString(), vals.toString());
 		/*Session sess = getMusicSession();
 		PreparedStatement ps = getPreparedStatementFromCache(cql);*/
-		String primaryKey;
-		if(ti.hasKey()) {
-			primaryKey = getMusicKeyFromRow(ti,tableName, keys);
-		}
-		else {
-			primaryKey = getMusicKeyFromRowWithoutPrimaryIndexes(ti,tableName, keys);
-		}
-		System.out.println("markDirtyRow: PK value: "+primaryKey);
-		
-		Object pkObj = null;
-		for (int i = 0; i < ti.columns.size(); i++) {
-			if (ti.iskey.get(i)) {
-				pkObj = keyObj[i];
-			}
-		}
-		for (String repl : allReplicaIds) {
-			pQueryObject = new PreparedQueryObject();
-			pQueryObject.appendQueryString(cql);
-			pQueryObject.addValue(tableName);
-			pQueryObject.addValue(repl);
-			pQueryObject.addValue(pkObj);
-			updateMusicDB(tableName, primaryKey, pQueryObject);
-			//if (!repl.equals(myId)) {
+        String primaryKey;
+        if(ti.hasKey()) {
+            primaryKey = getMusicKeyFromRow(ti,tableName, keys);
+        }
+        else {
+            primaryKey = getMusicKeyFromRowWithoutPrimaryIndexes(ti,tableName, keys);
+        }
+        System.out.println("markDirtyRow: PK value: "+primaryKey);
+
+        Object pkObj = null;
+        for (int i = 0; i < ti.columns.size(); i++) {
+            if (ti.iskey.get(i)) {
+                pkObj = keyObj[i];
+            }
+        }
+        for (String repl : allReplicaIds) {
+            pQueryObject = new PreparedQueryObject();
+            pQueryObject.appendQueryString(cql);
+            pQueryObject.addValue(tableName);
+            pQueryObject.addValue(repl);
+            pQueryObject.addValue(pkObj);
+            updateMusicDB(tableName, primaryKey, pQueryObject);
+            //if (!repl.equals(myId)) {
 				/*logger.info(EELFLoggerDelegate.applicationLogger,"Executing MUSIC write:"+ cql);
 				vallist.set(0, repl);
 				BoundStatement bound = ps.bind(vallist.toArray());
@@ -393,37 +432,37 @@ public class MusicMixin implements MusicInterface {
 				synchronized (sess) {
 					sess.execute(bound);
 				}*/
-			//}
-			
-		}
-	}
-	/**
-	 * Remove the entries from the dirty row (for this replica) that correspond to a set of primary keys
-	 * @param tableName the table we are removing dirty entries from
-	 * @param keys the primary key values to use in the DELETE.  Note: this is *only* the primary keys, not a full table row.
-	 */
-	@Override
-	public void cleanDirtyRow(TableInfo ti, String tableName, JSONObject keys) {
-		Object[] keysObjects = getObjects(ti,tableName,keys);
-		PreparedQueryObject pQueryObject = new PreparedQueryObject();
-		StringBuilder cols = new StringBuilder("REPLICA__=?");
-		List<Object> vallist = new ArrayList<Object>();
-		vallist.add(myId);
-		int n = 0;
-		for (int i = 0; i < ti.columns.size(); i++) {
-			if (ti.iskey.get(i)) {
-				cols.append(" AND ").append(ti.columns.get(i)).append("=?");
-				vallist.add(keysObjects[n++]);
-				pQueryObject.addValue(keysObjects[n++]);
-			}
-		}
-		String cql = String.format("DELETE FROM %s.DIRTY_%s WHERE %s;", music_ns, tableName, cols.toString());
-		logger.debug(EELFLoggerDelegate.applicationLogger,"Executing MUSIC write:"+ cql);
-		pQueryObject.appendQueryString(cql);
+            //}
+
+        }
+    }
+    /**
+     * Remove the entries from the dirty row (for this replica) that correspond to a set of primary keys
+     * @param tableName the table we are removing dirty entries from
+     * @param keys the primary key values to use in the DELETE.  Note: this is *only* the primary keys, not a full table row.
+     */
+    @Override
+    public void cleanDirtyRow(TableInfo ti, String tableName, JSONObject keys) {
+        Object[] keysObjects = getObjects(ti,tableName,keys);
+        PreparedQueryObject pQueryObject = new PreparedQueryObject();
+        StringBuilder cols = new StringBuilder("REPLICA__=?");
+        List<Object> vallist = new ArrayList<Object>();
+        vallist.add(myId);
+        int n = 0;
+        for (int i = 0; i < ti.columns.size(); i++) {
+            if (ti.iskey.get(i)) {
+                cols.append(" AND ").append(ti.columns.get(i)).append("=?");
+                vallist.add(keysObjects[n++]);
+                pQueryObject.addValue(keysObjects[n++]);
+            }
+        }
+        String cql = String.format("DELETE FROM %s.DIRTY_%s WHERE %s;", music_ns, tableName, cols.toString());
+        logger.debug(EELFLoggerDelegate.applicationLogger,"Executing MUSIC write:"+ cql);
+        pQueryObject.appendQueryString(cql);
         ReturnType rt = MusicCore.eventualPut(pQueryObject);
-		if(rt.getResult().getResult().toLowerCase().equals("failure")) {
-			System.out.println("Failure while cleanDirtyRow..."+rt.getMessage());
-		}
+        if(rt.getResult().getResult().toLowerCase().equals("failure")) {
+            System.out.println("Failure while cleanDirtyRow..."+rt.getMessage());
+        }
 		/*Session sess = getMusicSession();
 		PreparedStatement ps = getPreparedStatementFromCache(cql);
 		BoundStatement bound = ps.bind(vallist.toArray());
@@ -431,18 +470,18 @@ public class MusicMixin implements MusicInterface {
 		synchronized (sess) {
 			sess.execute(bound);
 		}*/
-	}
-	/**
-	 * Get a list of "dirty rows" for a table.  The dirty rows returned apply only to this replica,
-	 * and consist of a Map of primary key column names and values.
-	 * @param tableName the table we are querying for
-	 * @return a list of maps; each list item is a map of the primary key names and values for that "dirty row".
-	 */
-	@Override
-	public List<Map<String,Object>> getDirtyRows(TableInfo ti, String tableName) {
-		String cql = String.format("SELECT * FROM %s.DIRTY_%s WHERE REPLICA__=?;", music_ns, tableName);
-		ResultSet results = null;
-		logger.debug(EELFLoggerDelegate.applicationLogger,"Executing MUSIC write:"+ cql);
+    }
+    /**
+     * Get a list of "dirty rows" for a table.  The dirty rows returned apply only to this replica,
+     * and consist of a Map of primary key column names and values.
+     * @param tableName the table we are querying for
+     * @return a list of maps; each list item is a map of the primary key names and values for that "dirty row".
+     */
+    @Override
+    public List<Map<String,Object>> getDirtyRows(TableInfo ti, String tableName) {
+        String cql = String.format("SELECT * FROM %s.DIRTY_%s WHERE REPLICA__=?;", music_ns, tableName);
+        ResultSet results = null;
+        logger.debug(EELFLoggerDelegate.applicationLogger,"Executing MUSIC write:"+ cql);
 		
 		/*Session sess = getMusicSession();
 		PreparedStatement ps = getPreparedStatementFromCache(cql);
@@ -451,111 +490,111 @@ public class MusicMixin implements MusicInterface {
 		synchronized (sess) {
 			results = sess.execute(bound);
 		}*/
-		PreparedQueryObject pQueryObject = new PreparedQueryObject();
-		pQueryObject.appendQueryString(cql);
-		try {
-			results = MusicCore.get(pQueryObject);
-		} catch (MusicServiceException e) {
-			
-			e.printStackTrace();
-		}
-		
-		ColumnDefinitions cdef = results.getColumnDefinitions();
-		List<Map<String,Object>> list = new ArrayList<Map<String,Object>>();
-		for (Row row : results) {
-			Map<String,Object> objs = new HashMap<String,Object>();
-			for (int i = 0; i < cdef.size(); i++) {
-				String colname = cdef.getName(i).toUpperCase();
-				String coltype = cdef.getType(i).getName().toString().toUpperCase();
-				if (!colname.equals("REPLICA__")) {
-					switch (coltype) {
-					case "BIGINT":
-						objs.put(colname, row.getLong(colname));
-						break;
-					case "BOOLEAN":
-						objs.put(colname, row.getBool(colname));
-						break;
-					case "BLOB":
-						objs.put(colname, row.getString(colname));
-						break;
-					case "DATE":
-						objs.put(colname, row.getString(colname));
-						break;
-					case "DOUBLE":
-						objs.put(colname, row.getDouble(colname));
-						break;
-					case "DECIMAL":
-						objs.put(colname, row.getDecimal(colname));
-						break;
-					case "INT":
-						objs.put(colname, row.getInt(colname));
-						break;
-					case "TIMESTAMP":
-						objs.put(colname, row.getTimestamp(colname));
-						break;
-					case "VARCHAR":
-					default:
-						objs.put(colname, row.getString(colname));
-						break;
-					}
-				}
-			}
-			list.add(objs);
-		}
-		return list;
-	}
-
-	/**
-	 * Drops the named table and its dirty row table (for all replicas) from MUSIC.  The dirty row table is dropped first.
-	 * @param tableName This is the table that has been dropped
-	 */
-	@Override
-	public void clearMusicForTable(String tableName) {
-		dropDirtyRowTable(tableName);
-		String cql = String.format("DROP TABLE %s.%s;", music_ns, tableName);
-		executeMusicWriteQuery(cql);
-	}
-	/**
-	 * This function is called whenever there is a DELETE to a row on a local SQL table, wherein it updates the
-	 * MUSIC/Cassandra tables (both dirty bits and actual data) corresponding to the SQL write. MUSIC propagates
-	 * it to the other replicas.
-	 *
-	 * @param tableName This is the table that has changed.
-	 * @param oldRow This is a copy of the old row being deleted
-	 */
-	@Override
-	public void deleteFromEntityTableInMusic(TableInfo ti, String tableName, JSONObject oldRow) {
-		Object[] objects = getObjects(ti,tableName,oldRow);
-		PreparedQueryObject pQueryObject = new PreparedQueryObject();
-		if (ti.hasKey()) {
-			assert(ti.columns.size() == objects.length);
-		} else {
-			assert(ti.columns.size()+1 == objects.length);
-		}
-
-		StringBuilder where = new StringBuilder();
-		List<Object> vallist = new ArrayList<Object>();
-		String pfx = "";
-		for (int i = 0; i < ti.columns.size(); i++) {
-			if (ti.iskey.get(i)) {
-				where.append(pfx)
-				     .append(ti.columns.get(i))
-				     .append("=?");
-				vallist.add(objects[i]);
-				pQueryObject.addValue(objects[i]);
-				pfx = " AND ";
-			}
-		}
-		if (!ti.hasKey()) {
-			where.append(MDBC_PRIMARYKEY_NAME + "=?");
-			//\FIXME this is wrong, old row is not going to contain the UUID, this needs to be fixed 
-			vallist.add(UUID.fromString((String) objects[0]));
-			pQueryObject.addValue(UUID.fromString((String) objects[0]));
-		}
-
-		String cql = String.format("DELETE FROM %s.%s WHERE %s;", music_ns, tableName, where.toString());
-		logger.error(EELFLoggerDelegate.errorLogger,"Executing MUSIC write:"+ cql);
-		pQueryObject.appendQueryString(cql);
+        PreparedQueryObject pQueryObject = new PreparedQueryObject();
+        pQueryObject.appendQueryString(cql);
+        try {
+            results = MusicCore.get(pQueryObject);
+        } catch (MusicServiceException e) {
+
+            e.printStackTrace();
+        }
+
+        ColumnDefinitions cdef = results.getColumnDefinitions();
+        List<Map<String,Object>> list = new ArrayList<Map<String,Object>>();
+        for (Row row : results) {
+            Map<String,Object> objs = new HashMap<String,Object>();
+            for (int i = 0; i < cdef.size(); i++) {
+                String colname = cdef.getName(i).toUpperCase();
+                String coltype = cdef.getType(i).getName().toString().toUpperCase();
+                if (!colname.equals("REPLICA__")) {
+                    switch (coltype) {
+                        case "BIGINT":
+                            objs.put(colname, row.getLong(colname));
+                            break;
+                        case "BOOLEAN":
+                            objs.put(colname, row.getBool(colname));
+                            break;
+                        case "BLOB":
+                            objs.put(colname, row.getString(colname));
+                            break;
+                        case "DATE":
+                            objs.put(colname, row.getString(colname));
+                            break;
+                        case "DOUBLE":
+                            objs.put(colname, row.getDouble(colname));
+                            break;
+                        case "DECIMAL":
+                            objs.put(colname, row.getDecimal(colname));
+                            break;
+                        case "INT":
+                            objs.put(colname, row.getInt(colname));
+                            break;
+                        case "TIMESTAMP":
+                            objs.put(colname, row.getTimestamp(colname));
+                            break;
+                        case "VARCHAR":
+                        default:
+                            objs.put(colname, row.getString(colname));
+                            break;
+                    }
+                }
+            }
+            list.add(objs);
+        }
+        return list;
+    }
+
+    /**
+     * Drops the named table and its dirty row table (for all replicas) from MUSIC.  The dirty row table is dropped first.
+     * @param tableName This is the table that has been dropped
+     */
+    @Override
+    public void clearMusicForTable(String tableName) {
+        dropDirtyRowTable(tableName);
+        String cql = String.format("DROP TABLE %s.%s;", music_ns, tableName);
+        executeMusicWriteQuery(cql);
+    }
+    /**
+     * This function is called whenever there is a DELETE to a row on a local SQL table, wherein it updates the
+     * MUSIC/Cassandra tables (both dirty bits and actual data) corresponding to the SQL write. MUSIC propagates
+     * it to the other replicas.
+     *
+     * @param tableName This is the table that has changed.
+     * @param oldRow This is a copy of the old row being deleted
+     */
+    @Override
+    public void deleteFromEntityTableInMusic(TableInfo ti, String tableName, JSONObject oldRow) {
+        Object[] objects = getObjects(ti,tableName,oldRow);
+        PreparedQueryObject pQueryObject = new PreparedQueryObject();
+        if (ti.hasKey()) {
+            assert(ti.columns.size() == objects.length);
+        } else {
+            assert(ti.columns.size()+1 == objects.length);
+        }
+
+        StringBuilder where = new StringBuilder();
+        List<Object> vallist = new ArrayList<Object>();
+        String pfx = "";
+        for (int i = 0; i < ti.columns.size(); i++) {
+            if (ti.iskey.get(i)) {
+                where.append(pfx)
+                    .append(ti.columns.get(i))
+                    .append("=?");
+                vallist.add(objects[i]);
+                pQueryObject.addValue(objects[i]);
+                pfx = " AND ";
+            }
+        }
+        if (!ti.hasKey()) {
+            where.append(MDBC_PRIMARYKEY_NAME + "=?");
+            //\FIXME this is wrong, old row is not going to contain the UUID, this needs to be fixed
+            vallist.add(UUID.fromString((String) objects[0]));
+            pQueryObject.addValue(UUID.fromString((String) objects[0]));
+        }
+
+        String cql = String.format("DELETE FROM %s.%s WHERE %s;", music_ns, tableName, where.toString());
+        logger.error(EELFLoggerDelegate.errorLogger,"Executing MUSIC write:"+ cql);
+        pQueryObject.appendQueryString(cql);
 		
 		/*PreparedStatement ps = getPreparedStatementFromCache(cql);
 		BoundStatement bound = ps.bind(vallist.toArray());
@@ -564,61 +603,68 @@ public class MusicMixin implements MusicInterface {
 		synchronized (sess) {
 			sess.execute(bound);
 		}*/
-		String primaryKey = getMusicKeyFromRow(ti,tableName, oldRow);
+        String primaryKey = getMusicKeyFromRow(ti,tableName, oldRow);
 
         updateMusicDB(tableName, primaryKey, pQueryObject);
 
-		// Mark the dirty rows in music for all the replicas but us
-		markDirtyRow(ti,tableName, oldRow);
-	}
-
-	public Set<String> getMusicTableSet(String ns) {
-		Set<String> set = new TreeSet<String>();
-		String cql = String.format("SELECT TABLE_NAME FROM SYSTEM_SCHEMA.TABLES WHERE KEYSPACE_NAME = '%s'", ns);
-		ResultSet rs = executeMusicRead(cql);
-		for (Row row : rs) {
-			set.add(row.getString("TABLE_NAME").toUpperCase());
-		}
-		return set;
-	}
-	/**
-	 * This method is called whenever there is a SELECT on a local SQL table, wherein it first checks the local
-	 * dirty bits table to see if there are any keys in Cassandra whose value has not yet been sent to SQL
-	 * @param tableName This is the table on which the select is being performed
-	 */
-	@Override
-	public void readDirtyRowsAndUpdateDb(DBInterface dbi, String tableName) {
-		// Read dirty rows of this table from Music
-		TableInfo ti = dbi.getTableInfo(tableName);
-		List<Map<String,Object>> objlist = getDirtyRows(ti,tableName);
-		PreparedQueryObject pQueryObject = null;
-		String pre_cql = String.format("SELECT * FROM %s.%s WHERE ", music_ns, tableName);
-		List<Object> vallist = new ArrayList<Object>();
-		StringBuilder sb = new StringBuilder();
-		//\TODO Perform a batch operation instead of each row at a time
-		for (Map<String,Object> map : objlist) {
-			pQueryObject = new PreparedQueryObject();
-			sb.setLength(0);
-			vallist.clear();
-			String pfx = "";
-			for (String key : map.keySet()) {
-				sb.append(pfx).append(key).append("=?");
-				vallist.add(map.get(key));
-				pQueryObject.addValue(map.get(key));
-				pfx = " AND ";
-			}
-			
-			String cql = pre_cql + sb.toString();
-			System.out.println("readDirtyRowsAndUpdateDb: cql: "+cql);
-			pQueryObject.appendQueryString(cql);
-			ResultSet dirtyRows = null;
-			try {
-				//\TODO Why is this an eventual put?, this should be an atomic
-				dirtyRows = MusicCore.get(pQueryObject);
-			} catch (MusicServiceException e) {
-				
-				e.printStackTrace();
-			}
+        // Mark the dirty rows in music for all the replicas but us
+        markDirtyRow(ti,tableName, oldRow);
+    }
+
+    public Set<String> getMusicTableSet(String ns) {
+        Set<String> set = new TreeSet<String>();
+        String cql = String.format("SELECT TABLE_NAME FROM SYSTEM_SCHEMA.TABLES WHERE KEYSPACE_NAME = '%s'", ns);
+        ResultSet rs = null;
+        try {
+            rs = executeMusicRead(cql);
+        } catch (MDBCServiceException e) {
+            e.printStackTrace();
+        }
+        if(rs!=null) {
+            for (Row row : rs) {
+                set.add(row.getString("TABLE_NAME").toUpperCase());
+            }
+        }
+        return set;
+    }
+    /**
+     * This method is called whenever there is a SELECT on a local SQL table, wherein it first checks the local
+     * dirty bits table to see if there are any keys in Cassandra whose value has not yet been sent to SQL
+     * @param tableName This is the table on which the select is being performed
+     */
+    @Override
+    public void readDirtyRowsAndUpdateDb(DBInterface dbi, String tableName) {
+        // Read dirty rows of this table from Music
+        TableInfo ti = dbi.getTableInfo(tableName);
+        List<Map<String,Object>> objlist = getDirtyRows(ti,tableName);
+        PreparedQueryObject pQueryObject = null;
+        String pre_cql = String.format("SELECT * FROM %s.%s WHERE ", music_ns, tableName);
+        List<Object> vallist = new ArrayList<Object>();
+        StringBuilder sb = new StringBuilder();
+        //\TODO Perform a batch operation instead of each row at a time
+        for (Map<String,Object> map : objlist) {
+            pQueryObject = new PreparedQueryObject();
+            sb.setLength(0);
+            vallist.clear();
+            String pfx = "";
+            for (String key : map.keySet()) {
+                sb.append(pfx).append(key).append("=?");
+                vallist.add(map.get(key));
+                pQueryObject.addValue(map.get(key));
+                pfx = " AND ";
+            }
+
+            String cql = pre_cql + sb.toString();
+            System.out.println("readDirtyRowsAndUpdateDb: cql: "+cql);
+            pQueryObject.appendQueryString(cql);
+            ResultSet dirtyRows = null;
+            try {
+                //\TODO Why is this an eventual put?, this should be an atomic
+                dirtyRows = MusicCore.get(pQueryObject);
+            } catch (MusicServiceException e) {
+
+                e.printStackTrace();
+            }
 			/*
 			Session sess = getMusicSession();
 			PreparedStatement ps = getPreparedStatementFromCache(cql);
@@ -628,58 +674,58 @@ public class MusicMixin implements MusicInterface {
 			synchronized (sess) {
 				dirtyRows = sess.execute(bound);
 			}*/
-			List<Row> rows = dirtyRows.all();
-			if (rows.isEmpty()) {
-				// No rows, the row must have been deleted
-				deleteRowFromSqlDb(dbi,tableName, map);
-			} else {
-				for (Row row : rows) {
-					writeMusicRowToSQLDb(dbi,tableName, row);
-				}
-			}
-		}
-	}
-
-	private void deleteRowFromSqlDb(DBInterface dbi, String tableName, Map<String, Object> map) {
-		dbi.deleteRowFromSqlDb(tableName, map);
-		TableInfo ti = dbi.getTableInfo(tableName);
-		List<Object> vallist = new ArrayList<Object>();
-		for (int i = 0; i < ti.columns.size(); i++) {
-			if (ti.iskey.get(i)) {
-				String col = ti.columns.get(i);
-				Object val = map.get(col);
-				vallist.add(val);
-			}
-		}
-		cleanDirtyRow(ti, tableName, new JSONObject(vallist));
-	}
-	/**
-	 * This functions copies the contents of a row in Music into the corresponding row in the SQL table
-	 * @param tableName This is the name of the table in both Music and swl
-	 * @param musicRow This is the row in Music that is being copied into SQL
-	 */
-	private void writeMusicRowToSQLDb(DBInterface dbi, String tableName, Row musicRow) {
-		// First construct the map of columns and their values
-		TableInfo ti = dbi.getTableInfo(tableName);
-		Map<String, Object> map = new HashMap<String, Object>();
-		List<Object> vallist = new ArrayList<Object>();
-		String rowid = tableName;
-		for (String col : ti.columns) {
-			Object val = getValue(musicRow, col);
-			map.put(col, val);
-			if (ti.iskey(col)) {
-				vallist.add(val);
-				rowid += "_" + val.toString();
-			}
-		}
-
-		logger.debug("Blocking rowid: "+rowid);
-		in_progress.add(rowid);			// Block propagation of the following INSERT/UPDATE
-
-		dbi.insertRowIntoSqlDb(tableName, map);
-
-		logger.debug("Unblocking rowid: "+rowid);
-		in_progress.remove(rowid);		// Unblock propagation
+            List<Row> rows = dirtyRows.all();
+            if (rows.isEmpty()) {
+                // No rows, the row must have been deleted
+                deleteRowFromSqlDb(dbi,tableName, map);
+            } else {
+                for (Row row : rows) {
+                    writeMusicRowToSQLDb(dbi,tableName, row);
+                }
+            }
+        }
+    }
+
+    private void deleteRowFromSqlDb(DBInterface dbi, String tableName, Map<String, Object> map) {
+        dbi.deleteRowFromSqlDb(tableName, map);
+        TableInfo ti = dbi.getTableInfo(tableName);
+        List<Object> vallist = new ArrayList<Object>();
+        for (int i = 0; i < ti.columns.size(); i++) {
+            if (ti.iskey.get(i)) {
+                String col = ti.columns.get(i);
+                Object val = map.get(col);
+                vallist.add(val);
+            }
+        }
+        cleanDirtyRow(ti, tableName, new JSONObject(vallist));
+    }
+    /**
+     * This functions copies the contents of a row in Music into the corresponding row in the SQL table
+     * @param tableName This is the name of the table in both Music and swl
+     * @param musicRow This is the row in Music that is being copied into SQL
+     */
+    private void writeMusicRowToSQLDb(DBInterface dbi, String tableName, Row musicRow) {
+        // First construct the map of columns and their values
+        TableInfo ti = dbi.getTableInfo(tableName);
+        Map<String, Object> map = new HashMap<String, Object>();
+        List<Object> vallist = new ArrayList<Object>();
+        String rowid = tableName;
+        for (String col : ti.columns) {
+            Object val = getValue(musicRow, col);
+            map.put(col, val);
+            if (ti.iskey(col)) {
+                vallist.add(val);
+                rowid += "_" + val.toString();
+            }
+        }
+
+        logger.debug("Blocking rowid: "+rowid);
+        in_progress.add(rowid);			// Block propagation of the following INSERT/UPDATE
+
+        dbi.insertRowIntoSqlDb(tableName, map);
+
+        logger.debug("Unblocking rowid: "+rowid);
+        in_progress.remove(rowid);		// Unblock propagation
 
 //		try {
 //			String sql = String.format("INSERT INTO %s (%s) VALUES (%s);", tableName, fields.toString(), values.toString());
@@ -695,8 +741,8 @@ public class MusicMixin implements MusicInterface {
 //			}
 //		}
 
-		ti = dbi.getTableInfo(tableName);
-		cleanDirtyRow(ti, tableName, new JSONObject(vallist));
+        ti = dbi.getTableInfo(tableName);
+        cleanDirtyRow(ti, tableName, new JSONObject(vallist));
 
 //		String selectQuery = "select "+ primaryKeyName+" FROM "+tableName+" WHERE "+primaryKeyName+"="+primaryKeyValue+";";
 //		java.sql.ResultSet rs = executeSQLRead(selectQuery);
@@ -712,111 +758,111 @@ public class MusicMixin implements MusicInterface {
 //			e.printStackTrace();
 //		}
 
-		//clean the music dirty bits table
+        //clean the music dirty bits table
 //		String dirtyRowIdsTableName = music_ns+".DIRTY_"+tableName+"_"+myId;
 //		String deleteQuery = "DELETE FROM "+dirtyRowIdsTableName+" WHERE dirtyRowKeys=$$"+primaryKeyValue+"$$;";
 //		executeMusicWriteQuery(deleteQuery);
-	}
-	private Object getValue(Row musicRow, String colname) {
-		ColumnDefinitions cdef = musicRow.getColumnDefinitions();
-		DataType colType;
-		try {
-			colType= cdef.getType(colname);
-		}
-		catch(IllegalArgumentException e) {
-			logger.warn("Colname is not part of table metadata: "+e);
-			throw e;
-		}
-		String typeStr = colType.getName().toString().toUpperCase();
-		switch (typeStr) {
-		case "BIGINT":
-			return musicRow.getLong(colname);
-		case "BOOLEAN":
-			return musicRow.getBool(colname);
-		case "BLOB":
-			return musicRow.getString(colname);
-		case "DATE":
-			return musicRow.getString(colname);
-		case "DECIMAL":
-			return musicRow.getDecimal(colname);
-		case "DOUBLE":
-			return musicRow.getDouble(colname);
-		case "SMALLINT":
-		case "INT":
-			return musicRow.getInt(colname);
-		case "TIMESTAMP":
-			return musicRow.getTimestamp(colname);
-		case "UUID":
-			return musicRow.getUUID(colname);
-		default:
-			logger.error(EELFLoggerDelegate.errorLogger, "UNEXPECTED COLUMN TYPE: columname="+colname+", columntype="+typeStr);
-			// fall thru
-		case "VARCHAR":
-			return musicRow.getString(colname);
-		}
-	}
-
-	/**
-	 * This method is called whenever there is an INSERT or UPDATE to a local SQL table, wherein it updates the
-	 * MUSIC/Cassandra tables (both dirty bits and actual data) corresponding to the SQL write. Music propagates
-	 * it to the other replicas.
-	 *
-	 * @param tableName This is the table that has changed.
-	 * @param changedRow This is information about the row that has changed
-	 */
-	@Override
-	public void updateDirtyRowAndEntityTableInMusic(TableInfo ti, String tableName, JSONObject changedRow) {
-		// Build the CQL command
-		Object[] objects = getObjects(ti,tableName,changedRow);
-		StringBuilder fields = new StringBuilder();
-		StringBuilder values = new StringBuilder();
-		String rowid = tableName;
-		Object[] newrow = new Object[objects.length];
-		PreparedQueryObject pQueryObject = new PreparedQueryObject();
-		String pfx = "";
-		int keyoffset=0;
-		for (int i = 0; i < objects.length; i++) {
-			if (!ti.hasKey() && i==0) {
-				//We need to tack on cassandra's uid in place of a primary key
-				fields.append(MDBC_PRIMARYKEY_NAME);
-				values.append("?");
-				newrow[i] = UUID.fromString((String) objects[i]);
-				pQueryObject.addValue(newrow[i]);
-				keyoffset=-1;
-				pfx = ", ";
-				continue;
-			}
-			fields.append(pfx).append(ti.columns.get(i+keyoffset));
-			values.append(pfx).append("?");
-			pfx = ", ";
-			if (objects[i] instanceof byte[]) {
-				// Cassandra doesn't seem to have a Codec to translate a byte[] to a ByteBuffer
-				newrow[i] = ByteBuffer.wrap((byte[]) objects[i]);
-				pQueryObject.addValue(newrow[i]);
-			} else if (objects[i] instanceof Reader) {
-				// Cassandra doesn't seem to have a Codec to translate a Reader to a ByteBuffer either...
-				newrow[i] = ByteBuffer.wrap(readBytesFromReader((Reader) objects[i]));
-				pQueryObject.addValue(newrow[i]);
-			} else {
-				newrow[i] = objects[i];
-				pQueryObject.addValue(newrow[i]);
-			}
-			if (i+keyoffset>=0 && ti.iskey.get(i+keyoffset)) {
-				rowid += "_" + newrow[i].toString();
-			}
-		}
-
-		if (in_progress.contains(rowid)) {
-			// This call to updateDirtyRowAndEntityTableInMusic() was called as a result of a Cassandra -> H2 update; ignore
-			logger.debug(EELFLoggerDelegate.applicationLogger, "updateDirtyRowAndEntityTableInMusic: bypassing MUSIC update on "+rowid);
-			
-		} else {
-			// Update local MUSIC node. Note: in Cassandra you can insert again on an existing key..it becomes an update
-			String cql = String.format("INSERT INTO %s.%s (%s) VALUES (%s);", music_ns, tableName, fields.toString(), values.toString());
-			
-			pQueryObject.appendQueryString(cql);
-			String primaryKey = getMusicKeyFromRow(ti,tableName, changedRow);
-			updateMusicDB(tableName, primaryKey, pQueryObject);
+    }
+    private Object getValue(Row musicRow, String colname) {
+        ColumnDefinitions cdef = musicRow.getColumnDefinitions();
+        DataType colType;
+        try {
+            colType= cdef.getType(colname);
+        }
+        catch(IllegalArgumentException e) {
+            logger.warn("Colname is not part of table metadata: "+e);
+            throw e;
+        }
+        String typeStr = colType.getName().toString().toUpperCase();
+        switch (typeStr) {
+            case "BIGINT":
+                return musicRow.getLong(colname);
+            case "BOOLEAN":
+                return musicRow.getBool(colname);
+            case "BLOB":
+                return musicRow.getString(colname);
+            case "DATE":
+                return musicRow.getString(colname);
+            case "DECIMAL":
+                return musicRow.getDecimal(colname);
+            case "DOUBLE":
+                return musicRow.getDouble(colname);
+            case "SMALLINT":
+            case "INT":
+                return musicRow.getInt(colname);
+            case "TIMESTAMP":
+                return musicRow.getTimestamp(colname);
+            case "UUID":
+                return musicRow.getUUID(colname);
+            default:
+                logger.error(EELFLoggerDelegate.errorLogger, "UNEXPECTED COLUMN TYPE: columname="+colname+", columntype="+typeStr);
+                // fall thru
+            case "VARCHAR":
+                return musicRow.getString(colname);
+        }
+    }
+
+    /**
+     * This method is called whenever there is an INSERT or UPDATE to a local SQL table, wherein it updates the
+     * MUSIC/Cassandra tables (both dirty bits and actual data) corresponding to the SQL write. Music propagates
+     * it to the other replicas.
+     *
+     * @param tableName This is the table that has changed.
+     * @param changedRow This is information about the row that has changed
+     */
+    @Override
+    public void updateDirtyRowAndEntityTableInMusic(TableInfo ti, String tableName, JSONObject changedRow) {
+        // Build the CQL command
+        Object[] objects = getObjects(ti,tableName,changedRow);
+        StringBuilder fields = new StringBuilder();
+        StringBuilder values = new StringBuilder();
+        String rowid = tableName;
+        Object[] newrow = new Object[objects.length];
+        PreparedQueryObject pQueryObject = new PreparedQueryObject();
+        String pfx = "";
+        int keyoffset=0;
+        for (int i = 0; i < objects.length; i++) {
+            if (!ti.hasKey() && i==0) {
+                //We need to tack on cassandra's uid in place of a primary key
+                fields.append(MDBC_PRIMARYKEY_NAME);
+                values.append("?");
+                newrow[i] = UUID.fromString((String) objects[i]);
+                pQueryObject.addValue(newrow[i]);
+                keyoffset=-1;
+                pfx = ", ";
+                continue;
+            }
+            fields.append(pfx).append(ti.columns.get(i+keyoffset));
+            values.append(pfx).append("?");
+            pfx = ", ";
+            if (objects[i] instanceof byte[]) {
+                // Cassandra doesn't seem to have a Codec to translate a byte[] to a ByteBuffer
+                newrow[i] = ByteBuffer.wrap((byte[]) objects[i]);
+                pQueryObject.addValue(newrow[i]);
+            } else if (objects[i] instanceof Reader) {
+                // Cassandra doesn't seem to have a Codec to translate a Reader to a ByteBuffer either...
+                newrow[i] = ByteBuffer.wrap(readBytesFromReader((Reader) objects[i]));
+                pQueryObject.addValue(newrow[i]);
+            } else {
+                newrow[i] = objects[i];
+                pQueryObject.addValue(newrow[i]);
+            }
+            if (i+keyoffset>=0 && ti.iskey.get(i+keyoffset)) {
+                rowid += "_" + newrow[i].toString();
+            }
+        }
+
+        if (in_progress.contains(rowid)) {
+            // This call to updateDirtyRowAndEntityTableInMusic() was called as a result of a Cassandra -> H2 update; ignore
+            logger.debug(EELFLoggerDelegate.applicationLogger, "updateDirtyRowAndEntityTableInMusic: bypassing MUSIC update on "+rowid);
+
+        } else {
+            // Update local MUSIC node. Note: in Cassandra you can insert again on an existing key..it becomes an update
+            String cql = String.format("INSERT INTO %s.%s (%s) VALUES (%s);", music_ns, tableName, fields.toString(), values.toString());
+
+            pQueryObject.appendQueryString(cql);
+            String primaryKey = getMusicKeyFromRow(ti,tableName, changedRow);
+            updateMusicDB(tableName, primaryKey, pQueryObject);
 			
 			/*PreparedStatement ps = getPreparedStatementFromCache(cql);
 			BoundStatement bound = ps.bind(newrow);
@@ -825,208 +871,207 @@ public class MusicMixin implements MusicInterface {
 			synchronized (sess) {
 				sess.execute(bound);
 			}*/
-			// Mark the dirty rows in music for all the replicas but us
-			markDirtyRow(ti,tableName, changedRow);
-		}
-	}
-	
-
-
-	private byte[] readBytesFromReader(Reader rdr) {
-		StringBuilder sb = new StringBuilder();
-		try {
-			int ch;
-			while ((ch = rdr.read()) >= 0) {
-				sb.append((char)ch);
-			}
-		} catch (IOException e) {
-			logger.warn("readBytesFromReader: "+e);
-		}
-		return sb.toString().getBytes();
-	}
-
-	protected PreparedStatement getPreparedStatementFromCache(String cql) {
-		// Note: have to hope that the Session never changes!
-		if (!ps_cache.containsKey(cql)) {
-			Session sess = getMusicSession();
-			PreparedStatement ps = sess.prepare(cql);
-			ps_cache.put(cql, ps);
-		}
-		return ps_cache.get(cql);
-	}
-
-	/**
-	 * This method gets a connection to Music
-	 * @return the Cassandra Session to use
-	 */
-	protected Session getMusicSession() {
-		// create cassandra session
-		if (musicSession == null) {
-			logger.info(EELFLoggerDelegate.applicationLogger, "Creating New Music Session");
-			mCon = new MusicConnector(musicAddress);
-			musicSession = mCon.getSession();
-		}
-		return musicSession;
-	}
-
-	/**
-	 * This method executes a write query in Music
-	 * @param cql the CQL to be sent to Cassandra
-	 */
-	protected void executeMusicWriteQuery(String cql) {
-		logger.debug(EELFLoggerDelegate.applicationLogger, "Executing MUSIC write:"+ cql);
-		PreparedQueryObject pQueryObject = new PreparedQueryObject();
-		pQueryObject.appendQueryString(cql);
-		ReturnType rt = MusicCore.eventualPut(pQueryObject);
-		if(rt.getResult().getResult().toLowerCase().equals("failure")) {
-			logger.error(EELFLoggerDelegate.errorLogger, "Failure while eventualPut...: "+rt.getMessage());
-		}
+            // Mark the dirty rows in music for all the replicas but us
+            markDirtyRow(ti,tableName, changedRow);
+        }
+    }
+
+
+
+    private byte[] readBytesFromReader(Reader rdr) {
+        StringBuilder sb = new StringBuilder();
+        try {
+            int ch;
+            while ((ch = rdr.read()) >= 0) {
+                sb.append((char)ch);
+            }
+        } catch (IOException e) {
+            logger.warn("readBytesFromReader: "+e);
+        }
+        return sb.toString().getBytes();
+    }
+
+    protected PreparedStatement getPreparedStatementFromCache(String cql) {
+        // Note: have to hope that the Session never changes!
+        if (!ps_cache.containsKey(cql)) {
+            Session sess = getMusicSession();
+            PreparedStatement ps = sess.prepare(cql);
+            ps_cache.put(cql, ps);
+        }
+        return ps_cache.get(cql);
+    }
+
+    /**
+     * This method gets a connection to Music
+     * @return the Cassandra Session to use
+     */
+    protected Session getMusicSession() {
+        // create cassandra session
+        if (musicSession == null) {
+            logger.info(EELFLoggerDelegate.applicationLogger, "Creating New Music Session");
+            mCon = new MusicConnector(musicAddress);
+            musicSession = mCon.getSession();
+        }
+        return musicSession;
+    }
+
+    /**
+     * This method executes a write query in Music
+     * @param cql the CQL to be sent to Cassandra
+     */
+    protected void executeMusicWriteQuery(String cql) {
+        logger.debug(EELFLoggerDelegate.applicationLogger, "Executing MUSIC write:"+ cql);
+        PreparedQueryObject pQueryObject = new PreparedQueryObject();
+        pQueryObject.appendQueryString(cql);
+        ReturnType rt = MusicCore.eventualPut(pQueryObject);
+        if(rt.getResult().getResult().toLowerCase().equals("failure")) {
+            logger.error(EELFLoggerDelegate.errorLogger, "Failure while eventualPut...: "+rt.getMessage());
+        }
 		/*Session sess = getMusicSession();
 		SimpleStatement s = new SimpleStatement(cql);
 		s.setReadTimeoutMillis(60000);
 		synchronized (sess) {
 			sess.execute(s);
 		}*/
-	}
-
-	/**
-	 * This method executes a read query in Music
-	 * @param cql the CQL to be sent to Cassandra
-	 * @return a ResultSet containing the rows returned from the query
-	 */
-	protected ResultSet executeMusicRead(String cql) {
-		logger.debug(EELFLoggerDelegate.applicationLogger, "Executing MUSIC write:"+ cql);
-		PreparedQueryObject pQueryObject = new PreparedQueryObject();
-		pQueryObject.appendQueryString(cql);
-		ResultSet results = null;
-		try {
-			results = MusicCore.get(pQueryObject);
-		} catch (MusicServiceException e) {
-			
-			e.printStackTrace();
-		}
-		return results;
-		/*Session sess = getMusicSession();
-		synchronized (sess) {
-			return sess.execute(cql);
-		}*/
-	}
-
-	/**
-	 * Returns the default primary key name that this mixin uses
-	 */
-	public String getMusicDefaultPrimaryKeyName() {
-		return MDBC_PRIMARYKEY_NAME;
-	}
-
-	/**
-	 * Return the function for cassandra's primary key generation
-	 */
-	public String generateUniqueKey() {
-		return MDBCUtils.generateUniqueKey().toString();
-	}
-	
-	@Override
-	public String getMusicKeyFromRowWithoutPrimaryIndexes(TableInfo ti, String table, JSONObject dbRow) {
-		//\TODO this operation is super expensive to perform, both latency and BW 
-		// it is better to add additional where clauses, and have the primary key
-		// to be composed of known columns of the table
-		// Adding this primary indexes would be an additional burden to the developers, which spanner
-		// also does, but otherwise performance is really bad
-		// At least it should have a set of columns that are guaranteed to be unique
-		StringBuilder cqlOperation = new StringBuilder();
-		cqlOperation.append("SELECT * FROM ")
-					.append(music_ns)
-					.append(".")
-					.append(table);
-		ResultSet musicResults = executeMusicRead(cqlOperation.toString());
-		Object[] dbRowObjects = getObjects(ti,table,dbRow);
-		while (!musicResults.isExhausted()) {
-			Row musicRow = musicResults.one();
-			if (rowIs(ti, musicRow, dbRowObjects)) {
-				return ((UUID)getValue(musicRow, MDBC_PRIMARYKEY_NAME)).toString();
-			}
-		}
-		//should never reach here
-		return null;
-	}
-	
-	/**
-	 * Checks to see if this row is in list of database entries
-	 * @param ti
-	 * @param musicRow
-	 * @param dbRow
-	 * @return
-	 */
-	private boolean rowIs(TableInfo ti, Row musicRow, Object[] dbRow) {
-		//System.out.println("Comparing " + musicRow.toString());
-		boolean sameRow=true;
-		for (int i=0; i<ti.columns.size(); i++) {
-			Object val = getValue(musicRow, ti.columns.get(i));
-			if (!dbRow[i].equals(val)) {
-				sameRow=false;
-				break;
-			}
-		}
-		return sameRow;
-	}
-
-	@Override
-	public String getMusicKeyFromRow(TableInfo ti, String tableName, JSONObject row) {
-		List<String> keyCols = ti.getKeyColumns();
-		if(keyCols.isEmpty()){
-			throw new IllegalArgumentException("Table doesn't have defined primary indexes ");
-		}
-		StringBuilder key = new StringBuilder();
-		String pfx = "";
-		for(String keyCol: keyCols) {
-			key.append(pfx);
-			key.append(row.get(keyCol));
-			pfx = ",";
-		}
-		String keyStr = key.toString();
-		return keyStr;
-	}
-
-	public void updateMusicDB(String tableName, String primaryKey, PreparedQueryObject pQObject) {
-		ReturnType rt = MusicCore.eventualPut(pQObject);
-		if(rt.getResult().getResult().toLowerCase().equals("failure")) {
-			System.out.println("Failure while critical put..."+rt.getMessage());
-		}
-	}
-
-	/**
-	 * Build a preparedQueryObject that appends a transaction to the mriTable
-	 * @param mriTable
-	 * @param uuid
-	 * @param table
-	 * @param redoUuid
-	 * @return
-	 */
-	private PreparedQueryObject createAppendMtxdIndexToMriQuery(String mriTable, UUID uuid, String table, UUID redoUuid){
+    }
+
+    /**
+     * This method executes a read query in Music
+     * @param cql the CQL to be sent to Cassandra
+     * @return a ResultSet containing the rows returned from the query
+     */
+    protected ResultSet executeMusicRead(String cql) throws MDBCServiceException {
+        logger.debug(EELFLoggerDelegate.applicationLogger, "Executing MUSIC write:"+ cql);
+        PreparedQueryObject pQueryObject = new PreparedQueryObject();
+        pQueryObject.appendQueryString(cql);
+        ResultSet results = null;
+        try {
+            results = MusicCore.get(pQueryObject);
+        } catch (MusicServiceException e) {
+            logger.error("Error executing music get operation for query: ["+cql+"]");
+            throw new MDBCServiceException("Error executing get: "+e.getMessage());
+        }
+        return results;
+    }
+
+    /**
+     * Returns the default primary key name that this mixin uses
+     */
+    public String getMusicDefaultPrimaryKeyName() {
+        return MDBC_PRIMARYKEY_NAME;
+    }
+
+    /**
+     * Return the function for cassandra's primary key generation
+     */
+    @Override
+    public UUID generateUniqueKey() {
+        return MDBCUtils.generateUniqueKey();
+    }
+
+    @Override
+    public String getMusicKeyFromRowWithoutPrimaryIndexes(TableInfo ti, String table, JSONObject dbRow) {
+        //\TODO this operation is super expensive to perform, both latency and BW
+        // it is better to add additional where clauses, and have the primary key
+        // to be composed of known columns of the table
+        // Adding this primary indexes would be an additional burden to the developers, which spanner
+        // also does, but otherwise performance is really bad
+        // At least it should have a set of columns that are guaranteed to be unique
+        StringBuilder cqlOperation = new StringBuilder();
+        cqlOperation.append("SELECT * FROM ")
+            .append(music_ns)
+            .append(".")
+            .append(table);
+        ResultSet musicResults = null;
+        try {
+            musicResults = executeMusicRead(cqlOperation.toString());
+        } catch (MDBCServiceException e) {
+            return null;
+        }
+        Object[] dbRowObjects = getObjects(ti,table,dbRow);
+        while (!musicResults.isExhausted()) {
+            Row musicRow = musicResults.one();
+            if (rowIs(ti, musicRow, dbRowObjects)) {
+                return ((UUID)getValue(musicRow, MDBC_PRIMARYKEY_NAME)).toString();
+            }
+        }
+        //should never reach here
+        return null;
+    }
+
+    /**
+     * Checks to see if this row is in list of database entries
+     * @param ti
+     * @param musicRow
+     * @param dbRow
+     * @return
+     */
+    private boolean rowIs(TableInfo ti, Row musicRow, Object[] dbRow) {
+        //System.out.println("Comparing " + musicRow.toString());
+        boolean sameRow=true;
+        for (int i=0; i<ti.columns.size(); i++) {
+            Object val = getValue(musicRow, ti.columns.get(i));
+            if (!dbRow[i].equals(val)) {
+                sameRow=false;
+                break;
+            }
+        }
+        return sameRow;
+    }
+
+    @Override
+    public String getMusicKeyFromRow(TableInfo ti, String tableName, JSONObject row) {
+        List<String> keyCols = ti.getKeyColumns();
+        if(keyCols.isEmpty()){
+            throw new IllegalArgumentException("Table doesn't have defined primary indexes ");
+        }
+        StringBuilder key = new StringBuilder();
+        String pfx = "";
+        for(String keyCol: keyCols) {
+            key.append(pfx);
+            key.append(row.get(keyCol));
+            pfx = ",";
+        }
+        String keyStr = key.toString();
+        return keyStr;
+    }
+
+    public void updateMusicDB(String tableName, String primaryKey, PreparedQueryObject pQObject) {
+        ReturnType rt = MusicCore.eventualPut(pQObject);
+        if(rt.getResult().getResult().toLowerCase().equals("failure")) {
+            System.out.println("Failure while critical put..."+rt.getMessage());
+        }
+    }
+
+    /**
+     * Build a preparedQueryObject that appends a transaction to the mriTable
+     * @param mriTable
+     * @param uuid
+     * @param table
+     * @param redoUuid
+     * @return
+     */
+    private PreparedQueryObject createAppendMtxdIndexToMriQuery(String mriTable, UUID uuid, String table, UUID redoUuid){
         PreparedQueryObject query = new PreparedQueryObject();
         StringBuilder appendBuilder = new StringBuilder();
         appendBuilder.append("UPDATE ")
-                .append(music_ns)
-                .append(".")
-                .append(mriTable)
-                .append(" SET txredolog = txredolog +[('")
-                .append(table)
-                .append("',")
-                .append(redoUuid)
-                .append(")] WHERE rangeid = ")
-                .append(uuid)
-                .append(";");
+            .append(music_ns)
+            .append(".")
+            .append(mriTable)
+            .append(" SET txredolog = txredolog +[('")
+            .append(table)
+            .append("',")
+            .append(redoUuid)
+            .append(")] WHERE rangeid = ")
+            .append(uuid)
+            .append(";");
         query.appendQueryString(appendBuilder.toString());
         return query;
     }
 
-    protected String createAndAssignLock(String fullyQualifiedKey, DatabasePartition partition) throws MDBCServiceException {
-        UUID mriIndex = partition.getMusicRangeInformationIndex();
-	    String lockId;
-        lockId = MusicCore.createLockReference(fullyQualifiedKey);
-        //\TODO Handle better failures to acquire locks
+    protected ReturnType acquireLock(String fullyQualifiedKey, String lockId) throws MDBCServiceException{
         ReturnType lockReturn;
+        //\TODO Handle better failures to acquire locks
         try {
             lockReturn = MusicCore.acquireLock(fullyQualifiedKey,lockId);
         } catch (MusicLockingException e) {
@@ -1039,40 +1084,46 @@ public class MusicMixin implements MusicInterface {
             logger.error(EELFLoggerDelegate.errorLogger, "Error in executing query music, when locking key: "+fullyQualifiedKey);
             throw new MDBCServiceException("Error in executing query music, when locking: "+fullyQualifiedKey);
         }
-        //\TODO this is wrong, we should have a better way to obtain a lock forcefully, clean the queue and obtain the lock
+        return lockReturn;
+    }
+
+    protected List<LockResult> waitForLock(String fullyQualifiedKey, DatabasePartition partition) throws MDBCServiceException {
+        List<LockResult> result = new ArrayList<>();
+        String lockId;
+        lockId = MusicCore.createLockReference(fullyQualifiedKey);
+        ReturnType lockReturn = acquireLock(fullyQualifiedKey,lockId);
         if(lockReturn.getResult().compareTo(ResultType.SUCCESS) != 0 ) {
-            try {
-            	MusicCore.forciblyReleaseLock(fullyQualifiedKey,lockId);
-                CassaLockStore lockingServiceHandle = MusicCore.getLockingServiceHandle();
-                CassaLockStore.LockObject lockOwner = lockingServiceHandle.peekLockQueue(music_ns,
-                		this.musicRangeInformationTableName, mriIndex.toString());
-                while(lockOwner.lockRef != lockId) {
-                	MusicCore.forciblyReleaseLock(fullyQualifiedKey, lockOwner.lockRef);
-                	try {
-                        lockOwner = lockingServiceHandle.peekLockQueue(music_ns,
-                        		this.musicRangeInformationTableName, mriIndex.toString());
-                    } catch(NullPointerException e){
-                       //Ignore null pointer exception
-                        lockId = MusicCore.createLockReference(fullyQualifiedKey);
-                        break;
-                    }
+            //\TODO Improve the exponential backoff
+            int n = 1;
+            int low = 1;
+            int high = 1000;
+            Random r = new Random();
+            while(MusicCore.whoseTurnIsIt(fullyQualifiedKey)!=lockId){
+                try {
+                    Thread.sleep(((int) Math.round(Math.pow(2, n)) * 1000)
+                        + (r.nextInt(high - low) + low));
+                } catch (InterruptedException e) {
+                    continue;
+                }
+                if(n++==20){
+                    throw new MDBCServiceException("Lock was impossible to obtain, waited for 20 exponential backoffs!") ;
                 }
-                lockReturn = MusicCore.acquireLock(fullyQualifiedKey,lockId);
-
-            } catch (MusicLockingException e) {
-                throw new MDBCServiceException("Could not lock the corresponding lock");
-            } catch (MusicServiceException e) {
-                logger.error(EELFLoggerDelegate.errorLogger, "Error in music, when locking key: "+fullyQualifiedKey);
-                throw new MDBCServiceException("Error in music, when locking: "+fullyQualifiedKey);
-            } catch (MusicQueryException e) {
-                logger.error(EELFLoggerDelegate.errorLogger, "Error in executing query music, when locking key: "+fullyQualifiedKey);
-                throw new MDBCServiceException("Error in executing query music, when locking: "+fullyQualifiedKey);
             }
         }
+        partition.setLockId(lockId);
+        result.add(new LockResult(partition.getMusicRangeInformationIndex(),lockId,true));
+        return result;
+    }
+
+    protected String createAndAssignLock(String fullyQualifiedKey, DatabasePartition partition) throws MDBCServiceException {
+        UUID mriIndex = partition.getMusicRangeInformationIndex();
+        String lockId;
+        lockId = MusicCore.createLockReference(fullyQualifiedKey);
+        ReturnType lockReturn = acquireLock(fullyQualifiedKey,lockId);
+        //\TODO this is wrong, we should have a better way to obtain a lock forcefully, clean the queue and obtain the lock
         if(lockReturn.getResult().compareTo(ResultType.SUCCESS) != 0 ) {
-            throw new MDBCServiceException("Could not lock the corresponding lock");
+            return null;
         }
-        //TODO: Java newbie here, verify that this lockId is actually assigned to the global DatabasePartition in the StateManager instance
         partition.setLockId(lockId);
         return lockId;
     }
@@ -1092,28 +1143,21 @@ public class MusicMixin implements MusicInterface {
      * Writes the transaction information to metric's txDigest and musicRangeInformation table
      * This officially commits the transaction globally
      */
-	@Override
-	public void commitLog(DatabasePartition partition,
-			HashMap<Range,StagingTable> transactionDigest, String txId ,
-			TxCommitProgress progressKeeper) throws MDBCServiceException {
-		if (transactionDigest==null || transactionDigest.size()==0) {
-			return;
-		}
-		logger.info("Commiting lock for " + partition.getMusicRangeInformationIndex() + ", txID=" + txId);
-		UUID mriIndex = partition.getMusicRangeInformationIndex();
-		if(mriIndex==null) {
-			//\TODO Fetch MriIndex from the Range Information Table
-			throw new MDBCServiceException("TIT Index retrieval not yet implemented");
-		}
+    @Override
+    public void commitLog(DatabasePartition partition, HashMap<Range,StagingTable> transactionDigest, String txId ,TxCommitProgress progressKeeper) throws MDBCServiceException{
+        UUID mriIndex = partition.getMusicRangeInformationIndex();
+        if(mriIndex==null) {
+            own(partition.getSnapshot(),partition);
+        }
         String fullyQualifiedMriKey = music_ns+"."+ this.musicRangeInformationTableName+"."+mriIndex.toString();
-		//0. See if reference to lock was already created
-		String lockId = partition.getLockId();
-		if(lockId == null || lockId.isEmpty()) {
-            lockId = createAndAssignLock(fullyQualifiedMriKey,partition);
-		}
-
-		UUID commitId;
-		//Generate a local commit id
+        //0. See if reference to lock was already created
+        String lockId = partition.getLockId();
+        if(lockId == null || lockId.isEmpty()) {
+            waitForLock(fullyQualifiedMriKey,partition);
+        }
+
+        UUID commitId;
+        //Generate a local commit id
         if(progressKeeper.containsTx(txId)) {
             commitId = progressKeeper.getCommitId(txId);
         }
@@ -1123,7 +1167,7 @@ public class MusicMixin implements MusicInterface {
         }
         //Add creation type of transaction digest
 
-		//1. Push new row to RRT and obtain its index
+        //1. Push new row to RRT and obtain its index
         String serializedTransactionDigest;
         try {
             serializedTransactionDigest = MDBCUtils.toString(transactionDigest);
@@ -1133,11 +1177,11 @@ public class MusicMixin implements MusicInterface {
         MusicTxDigestId digestId = new MusicTxDigestId(commitId);
         addTxDigest(digestId, serializedTransactionDigest);
         //2. Save RRT index to RQ
-		if(progressKeeper!= null) {
-			progressKeeper.setRecordId(txId,digestId);
-		}
-		//3. Append RRT index into the corresponding TIT row array
-		appendToRedoLog(mriIndex,partition,digestId);
+        if(progressKeeper!= null) {
+            progressKeeper.setRecordId(txId,digestId);
+        }
+        //3. Append RRT index into the corresponding TIT row array
+        appendToRedoLog(mriIndex,partition,digestId);
     }
 
     /**
@@ -1146,91 +1190,104 @@ public class MusicMixin implements MusicInterface {
      * @param rowValues
      * @return
      */
-	@SuppressWarnings("unused")
-	private String getUid(String tableName, String string, Object[] rowValues) {
-		// 
-		// Update local MUSIC node. Note: in Cassandra you can insert again on an existing key..it becomes an update
-		String cql = String.format("SELECT * FROM %s.%s;", music_ns, tableName);
-		PreparedStatement ps = getPreparedStatementFromCache(cql);
-		BoundStatement bound = ps.bind();
-		bound.setReadTimeoutMillis(60000);
-		Session sess = getMusicSession();
-		ResultSet rs;
-		synchronized (sess) {
-			rs = sess.execute(bound);
-		}
-
-		//should never reach here
-		logger.error(EELFLoggerDelegate.errorLogger, "Could not find the row in the primary key");
-		return null;
-	}
-
-	@Override
-	public Object[] getObjects(TableInfo ti, String tableName, JSONObject row) {
-		// \FIXME: we may need to add the primary key of the row if it was autogenerated by MUSIC
-		List<String> cols = ti.columns;
-		int size = cols.size();
-		boolean hasDefault = false;
-		if(row.has(getMusicDefaultPrimaryKeyName())) {
-			size++;
-			hasDefault = true;
-		}
-
-		Object[] objects = new Object[size];
-		int idx = 0;
-		if(hasDefault) {
-			objects[idx++] = row.getString(getMusicDefaultPrimaryKeyName());
-		}
-		for(String col : ti.columns) {
-			objects[idx]=row.get(col);
-		}
-		return objects;
-	}
-	
-	@Override
-    public List<UUID> getPartitionIndexes() {
-    	ArrayList<UUID> partitions = new ArrayList<UUID>();
-    	String cql = String.format("SELECT rangeid FROM %s.%s", music_ns, musicRangeInformationTableName);
-    	ResultSet rs = executeMusicRead(cql);
-    	for (Row r: rs) {
-    		partitions.add(r.getUUID("rangeid"));
-    	}
-    	return partitions;
-    }
-	
+    @SuppressWarnings("unused")
+    private String getUid(String tableName, String string, Object[] rowValues) {
+        //
+        // Update local MUSIC node. Note: in Cassandra you can insert again on an existing key..it becomes an update
+        String cql = String.format("SELECT * FROM %s.%s;", music_ns, tableName);
+        PreparedStatement ps = getPreparedStatementFromCache(cql);
+        BoundStatement bound = ps.bind();
+        bound.setReadTimeoutMillis(60000);
+        Session sess = getMusicSession();
+        ResultSet rs;
+        synchronized (sess) {
+            rs = sess.execute(bound);
+        }
+
+        //should never reach here
+        logger.error(EELFLoggerDelegate.errorLogger, "Could not find the row in the primary key");
+        return null;
+    }
+
+    public Object[] getObjects(TableInfo ti, String tableName, JSONObject row) {
+        // \FIXME: we may need to add the primary key of the row if it was autogenerated by MUSIC
+        List<String> cols = ti.columns;
+        int size = cols.size();
+        boolean hasDefault = false;
+        if(row.has(getMusicDefaultPrimaryKeyName())) {
+            size++;
+            hasDefault = true;
+        }
+
+        Object[] objects = new Object[size];
+        int idx = 0;
+        if(hasDefault) {
+            objects[idx++] = row.getString(getMusicDefaultPrimaryKeyName());
+        }
+        for(String col : ti.columns) {
+            objects[idx]=row.get(col);
+        }
+        return objects;
+    }
+
+    @Override
+    public List<UUID> getPartitionIndexes() throws MDBCServiceException {
+        ArrayList<UUID> partitions = new ArrayList<UUID>();
+        String cql = String.format("SELECT rangeid FROM %s.%s", music_ns, musicRangeInformationTableName);
+        ResultSet rs = executeMusicRead(cql);
+        for (Row r: rs) {
+            partitions.add(r.getUUID("rangeid"));
+        }
+        return partitions;
+    }
+
+    List<Range> getRanges(Row newRow){
+        List<Range> partitions = new ArrayList<>();
+        Set<String> tables = newRow.getSet("keys",String.class);
+        for (String table:tables){
+            partitions.add(new Range(table));
+        }
+        return partitions;
+    }
+
+    MusicRangeInformationRow getMRIRowFromCassandraRow(Row newRow){
+        UUID partitionIndex = newRow.getUUID("rangeid");
+        List<TupleValue> log = newRow.getList("txredolog",TupleValue.class);
+        List<MusicTxDigestId> digestIds = new ArrayList<>();
+        for(TupleValue t: log){
+            //final String tableName = t.getString(0);
+            final UUID index = t.getUUID(1);
+            digestIds.add(new MusicTxDigestId(index));
+        }
+        List<Range> partitions = new ArrayList<>();
+        Set<String> tables = newRow.getSet("keys",String.class);
+        for (String table:tables){
+            partitions.add(new Range(table));
+        }
+        return new MusicRangeInformationRow(new DatabasePartition(partitions, partitionIndex, ""),
+            digestIds, newRow.getString("ownerid"),newRow.getString("metricprocessid"));
+    }
+
     @Override
     public MusicRangeInformationRow getMusicRangeInformation(UUID partitionIndex) throws MDBCServiceException {
-	    //TODO: verify that lock id is valid before calling the database operations function
+        //TODO: verify that lock id is valid before calling the database operations function
         //UUID id = partition.getMusicRangeInformationIndex();
 
         String cql = String.format("SELECT * FROM %s.%s WHERE rangeid = ?;", music_ns, musicRangeInformationTableName);
-    	PreparedQueryObject pQueryObject = new PreparedQueryObject();
-    	pQueryObject.appendQueryString(cql);
-    	pQueryObject.addValue(partitionIndex);
-    	Row newRow;
-    	try {
-    		newRow = executeMusicUnlockedQuorumGet(pQueryObject);
-    	} catch (MDBCServiceException e) {
-    		logger.error("Get operationt error: Failure to get row from MRI "+musicRangeInformationTableName);
-    		throw new MDBCServiceException("Initialization error:Failure to add new row to transaction information");
-    	}
-
-    	List<TupleValue> log = newRow.getList("txredolog",TupleValue.class);
-    	List<MusicTxDigestId> digestIds = new ArrayList<>();
-    	for(TupleValue t: log){
-    		//final String tableName = t.getString(0);
-    		final UUID index = t.getUUID(1);
-    		digestIds.add(new MusicTxDigestId(index));
-    	}
-    	List<Range> partitions = new ArrayList<>();
-    	Set<String> tables = newRow.getSet("keys",String.class);
-    	for (String table:tables){
-    		partitions.add(new Range(table));
-    	}
-    	return new MusicRangeInformationRow(new DatabasePartition(partitions, partitionIndex, ""),
-    			digestIds, newRow.getString("ownerid"),newRow.getString("metricprocessid"));
-    }
-    
+        PreparedQueryObject pQueryObject = new PreparedQueryObject();
+        pQueryObject.appendQueryString(cql);
+        pQueryObject.addValue(partitionIndex);
+        Row newRow;
+        try {
+            newRow = executeMusicUnlockedQuorumGet(pQueryObject);
+        } catch (MDBCServiceException e) {
+            logger.error("Get operationt error: Failure to get row from MRI "+musicRangeInformationTableName);
+            throw new MDBCServiceException("Initialization error:Failure to add new row to transaction information");
+        }
+
+    	return getMRIRowFromCassandraRow(newRow);
+    }
+
 
     /**
      * This function creates the TransactionInformation table. It contain information related
@@ -1254,7 +1311,7 @@ public class MusicMixin implements MusicInterface {
         //TODO: Frozen is only needed for old versions of cassandra, please update correspondingly
         fields.append("txredolog list<frozen<tuple<text,uuid>>> ");
         String cql = String.format("CREATE TABLE IF NOT EXISTS %s.%s (%s, PRIMARY KEY (%s));",
-        		this.music_ns, tableName, fields, priKey);
+            this.music_ns, tableName, fields, priKey);
         try {
             executeMusicWriteQuery(this.music_ns,tableName,cql);
         } catch (MDBCServiceException e) {
@@ -1262,251 +1319,437 @@ public class MusicMixin implements MusicInterface {
             throw(e);
         }
     }
-    
-    
+
+
     @Override
     public DatabasePartition createMusicRangeInformation(MusicRangeInformationRow info) throws MDBCServiceException {
-	    DatabasePartition newPartition = info.getDBPartition();
+        DatabasePartition newPartition = info.getDBPartition();
+
         String fullyQualifiedMriKey = music_ns+"."+ musicRangeInformationTableName+"."+newPartition.getMusicRangeInformationIndex().toString();
         String lockId = createAndAssignLock(fullyQualifiedMriKey,newPartition);
-        createEmptyMriRow(info.getMetricProcessId(),lockId,new ArrayList<Range>());
-        throw new UnsupportedOperationException();
+        if(lockId == null || lockId.isEmpty()){
+            throw new MDBCServiceException("Error initializing music range information, error creating a lock for a new row") ;
+        }
+        createEmptyMriRow(newPartition.getMusicRangeInformationIndex(),info.getMetricProcessId(),lockId,newPartition.getSnapshot());
+        return newPartition;
     }
-    
+
     /**
      * Creates a new empty MRI row
      * @param processId id of the process that is going to own initially this.
      * @return uuid associated to the new row
      */
     private UUID createEmptyMriRow(String processId, String lockId, List<Range> ranges)
-    		throws MDBCServiceException {
+        throws MDBCServiceException {
         UUID id = MDBCUtils.generateUniqueKey();
         return createEmptyMriRow(id,processId,lockId,ranges);
     }
-    
+
     /**
      * Creates a new empty MRI row
      * @param processId id of the process that is going to own initially this.
      * @return uuid associated to the new row
      */
     private UUID createEmptyMriRow(UUID id, String processId, String lockId, List<Range> ranges)
-    		throws MDBCServiceException{
-    	StringBuilder insert = new StringBuilder("INSERT INTO ")
-    			.append(this.music_ns)
-    			.append('.')
-    			.append(this.musicRangeInformationTableName)
-    			.append(" (rangeid,keys,ownerid,metricprocessid,txredolog) VALUES ")
-    			.append("(")
-    			.append(id)
-    			.append(",{");
-    	boolean first=true;
-    	for(Range r: ranges){
-    		if(first){ first=false; }
-    		else {
-    			insert.append(',');
-    		}
-    		insert.append("'").append(r.toString()).append("'");
-    	}
-    	insert.append("},'")
-    	.append((lockId==null)?"":lockId)
-    	.append("','")
-    	.append(processId)
-    	.append("',[]);");
-    	PreparedQueryObject query = new PreparedQueryObject();
-    	query.appendQueryString(insert.toString());
-    	try {
-    		executeMusicLockedPut(this.music_ns,this.musicRangeInformationTableName,id.toString(),query,lockId,null);
-    	} catch (MDBCServiceException e) {
-    		logger.error("Initialization error: Failure to add new row to transaction information");
-    		throw new MDBCServiceException("Initialization error:Failure to add new row to transaction information");
-    	}
-    	return id;
+        throws MDBCServiceException{
+        StringBuilder insert = new StringBuilder("INSERT INTO ")
+            .append(this.music_ns)
+            .append('.')
+            .append(this.musicRangeInformationTableName)
+            .append(" (rangeid,keys,ownerid,metricprocessid,txredolog) VALUES ")
+            .append("(")
+            .append(id)
+            .append(",{");
+        boolean first=true;
+        for(Range r: ranges){
+            if(first){ first=false; }
+            else {
+                insert.append(',');
+            }
+            insert.append("'").append(r.toString()).append("'");
+        }
+        insert.append("},'")
+            .append((lockId==null)?"":lockId)
+            .append("','")
+            .append(processId)
+            .append("',[]);");
+        PreparedQueryObject query = new PreparedQueryObject();
+        query.appendQueryString(insert.toString());
+        try {
+            executeMusicLockedPut(this.music_ns,this.musicRangeInformationTableName,id.toString(),query,lockId,null);
+        } catch (MDBCServiceException e) {
+            logger.error("Initialization error: Failure to add new row to transaction information");
+            throw new MDBCServiceException("Initialization error:Failure to add new row to transaction information");
+        }
+        return id;
     }
 
     @Override
     public void appendToRedoLog(UUID mriRowId, DatabasePartition partition, MusicTxDigestId newRecord) throws MDBCServiceException {
-		logger.info("Appending to redo log for partition " + partition.getMusicRangeInformationIndex() + " txId=" + newRecord.txId);
-    	PreparedQueryObject appendQuery = createAppendMtxdIndexToMriQuery(musicRangeInformationTableName, mriRowId, musicTxDigestTableName, newRecord.txId);
-		ReturnType returnType = MusicCore.criticalPut(music_ns, musicRangeInformationTableName, mriRowId.toString(), appendQuery, partition.getLockId(), null);
-		if(returnType.getResult().compareTo(ResultType.SUCCESS) != 0 ){
-			logger.error(EELFLoggerDelegate.errorLogger, "Error when executing append operation with return type: "+returnType.getMessage());
-			throw new MDBCServiceException("Error when executing append operation with return type: "+returnType.getMessage());
-		}
-    }
-    
+        logger.info("Appending to redo log for partition " + partition.getMusicRangeInformationIndex() + " txId=" + newRecord.txId);
+        PreparedQueryObject appendQuery = createAppendMtxdIndexToMriQuery(musicRangeInformationTableName, mriRowId, musicTxDigestTableName, newRecord.txId);
+        ReturnType returnType = MusicCore.criticalPut(music_ns, musicRangeInformationTableName, mriRowId.toString(), appendQuery, partition.getLockId(), null);
+        if(returnType.getResult().compareTo(ResultType.SUCCESS) != 0 ){
+            logger.error(EELFLoggerDelegate.errorLogger, "Error when executing append operation with return type: "+returnType.getMessage());
+            throw new MDBCServiceException("Error when executing append operation with return type: "+returnType.getMessage());
+        }
+    }
+
     public void createMusicTxDigest() throws MDBCServiceException {
-	    createMusicTxDigest(-1);
-	}
-    
-    
-	/**
-	 * This function creates the MusicTxDigest table. It contain information related to each transaction committed
-	 * 	* LeaseId: id associated with the lease, text
-	 * 	* LeaseCounter: transaction number under this lease, bigint \TODO this may need to be a varint later
-	 *  * TransactionDigest: text that contains all the changes in the transaction
-	 */
-	private void createMusicTxDigest(int musicTxDigestTableNumber) throws MDBCServiceException {
-	    String tableName = this.musicTxDigestTableName;
-	    if(musicTxDigestTableNumber >= 0) {
-	        tableName = tableName +
-	                "-" +
-	                Integer.toString(musicTxDigestTableNumber);
-	    }
-	    String priKey = "txid";
-	    StringBuilder fields = new StringBuilder();
-	    fields.append("txid uuid, ");
-	    fields.append("transactiondigest text ");//notice lack of ','
-	    String cql = String.format("CREATE TABLE IF NOT EXISTS %s.%s (%s, PRIMARY KEY (%s));", this.music_ns, tableName, fields, priKey);
-	    try {
-	        executeMusicWriteQuery(this.music_ns,tableName,cql);
-	    } catch (MDBCServiceException e) {
-	        logger.error("Initialization error: Failure to create redo records table");
-	        throw(e);
-	    }
-	}
-    
-    
-	/**
-	 * Writes the transaction history to the txDigest
-	 */
+        createMusicTxDigest(-1);
+    }
+
+
+    /**
+     * This function creates the MusicTxDigest table. It contain information related to each transaction committed
+     * 	* LeaseId: id associated with the lease, text
+     * 	* LeaseCounter: transaction number under this lease, bigint \TODO this may need to be a varint later
+     *  * TransactionDigest: text that contains all the changes in the transaction
+     */
+    private void createMusicTxDigest(int musicTxDigestTableNumber) throws MDBCServiceException {
+        String tableName = this.musicTxDigestTableName;
+        if(musicTxDigestTableNumber >= 0) {
+            tableName = tableName +
+                "-" +
+                Integer.toString(musicTxDigestTableNumber);
+        }
+        String priKey = "txid";
+        StringBuilder fields = new StringBuilder();
+        fields.append("txid uuid, ");
+        fields.append("transactiondigest text ");//notice lack of ','
+        String cql = String.format("CREATE TABLE IF NOT EXISTS %s.%s (%s, PRIMARY KEY (%s));", this.music_ns, tableName, fields, priKey);
+        try {
+            executeMusicWriteQuery(this.music_ns,tableName,cql);
+        } catch (MDBCServiceException e) {
+            logger.error("Initialization error: Failure to create redo records table");
+            throw(e);
+        }
+    }
+
+
+    /**
+     * Writes the transaction history to the txDigest
+     */
     @Override
     public void addTxDigest(MusicTxDigestId newId, String transactionDigest) throws MDBCServiceException {
-	    //createTxDigestRow(music_ns,musicTxDigestTable,newId,transactionDigest);
-	    PreparedQueryObject query = new PreparedQueryObject();
-	    String cqlQuery = "INSERT INTO " +
-	            this.music_ns +
-	            '.' +
-	            this.musicTxDigestTableName +
-	            " (txid,transactiondigest) " +
-	            "VALUES (" +
-	            newId.txId + ",'" +
-	            transactionDigest +
-	            "');";
-	    query.appendQueryString(cqlQuery);
-	    //\TODO check if I am not shooting on my own foot
-	    try {
-	        MusicCore.nonKeyRelatedPut(query,"critical");
-	    } catch (MusicServiceException e) {
-	        logger.error(EELFLoggerDelegate.errorLogger, "Transaction Digest serialization was invalid for commit "+newId.txId.toString()+ "with error "+e.getErrorMessage());
-	        throw new MDBCServiceException("Transaction Digest serialization for commit "+newId.txId.toString());
-	    }
-    }
-    
+        //createTxDigestRow(music_ns,musicTxDigestTable,newId,transactionDigest);
+        PreparedQueryObject query = new PreparedQueryObject();
+        String cqlQuery = "INSERT INTO " +
+            this.music_ns +
+            '.' +
+            this.musicTxDigestTableName +
+            " (txid,transactiondigest) " +
+            "VALUES (" +
+            newId.txId + ",'" +
+            transactionDigest +
+            "');";
+        query.appendQueryString(cqlQuery);
+        //\TODO check if I am not shooting on my own foot
+        try {
+            MusicCore.nonKeyRelatedPut(query,"critical");
+        } catch (MusicServiceException e) {
+            logger.error(EELFLoggerDelegate.errorLogger, "Transaction Digest serialization was invalid for commit "+newId.txId.toString()+ "with error "+e.getErrorMessage());
+            throw new MDBCServiceException("Transaction Digest serialization for commit "+newId.txId.toString());
+        }
+    }
 
+    @Override
+    public HashMap<Range,StagingTable> getTxDigest(MusicTxDigestId id) throws MDBCServiceException {
+        String cql = String.format("SELECT * FROM %s.%s WHERE txid = ?;", music_ns, musicTxDigestTableName);
+        PreparedQueryObject pQueryObject = new PreparedQueryObject();
+        pQueryObject.appendQueryString(cql);
+        pQueryObject.addValue(id.txId);
+        Row newRow;
+        try {
+            newRow = executeMusicUnlockedQuorumGet(pQueryObject);
+        } catch (MDBCServiceException e) {
+            logger.error("Get operation error: Failure to get row from txdigesttable with id:"+id.txId);
+            throw new MDBCServiceException("Initialization error:Failure to add new row to transaction information");
+        }
+        String digest = newRow.getString("transactiondigest");
+        HashMap<Range,StagingTable> changes;
+        try {
+            changes = (HashMap<Range, StagingTable>) MDBCUtils.fromString(digest);
+        } catch (IOException e) {
+            logger.error("IOException when deserializing digest failed with an invalid class for id:"+id.txId);
+            throw new MDBCServiceException("Deserializng digest failed with ioexception");
+        } catch (ClassNotFoundException e) {
+            logger.error("Deserializng digest failed with an invalid class for id:"+id.txId);
+            throw new MDBCServiceException("Deserializng digest failed with an invalid class");
+        }
+        return changes;
+    }
+
+    /**
+     * This function is used to find all the related uuids associated with the required ranges
+     * @param ranges ranges to be find
+     * @return a map that associated each MRI row to the corresponding ranges
+     */
+    private Map<UUID,List<Range>> findRangeRows(List<Range> ranges) throws MDBCServiceException {
+            /* \TODO this function needs to be improved, by creating an additional index, or at least keeping a local cache
+         Additionally, we should at least used pagination and the token function, to avoid retrieving the whole table at
+         once, this can become problematic if we have too many connections in the overall METRIC system */
+        Map<UUID,List<Range>> result = new HashMap<>();
+        List<Range> rangesCopy = new LinkedList<>(ranges);
+        int counter=0;
+        StringBuilder cqlOperation = new StringBuilder();
+        cqlOperation.append("SELECT * FROM ")
+            .append(music_ns)
+            .append(".")
+            .append(musicRangeInformationTableName);
+        ResultSet musicResults = executeMusicRead(cqlOperation.toString());
+        while (!musicResults.isExhausted()) {
+            Row musicRow = musicResults.one();
+            UUID mriIndex = musicRow.getUUID("rangeid");
+            final List<Range> musicRanges = getRanges(musicRow);
+            for(Range retrievedRange : musicRanges) {
+                for (Iterator<Range> iterator = rangesCopy.iterator(); iterator.hasNext(); ) {
+                    Range range = iterator.next();
+                    if (retrievedRange.overlaps(range)) {
+                        // Remove the current element from the iterator and the list.
+                        if(!result.containsKey(mriIndex)){
+                            result.put(mriIndex,new ArrayList<>());
+                        }
+                        List<Range> foundRanges = result.get(mriIndex);
+                        foundRanges.add(range);
+                        iterator.remove();
+                    }
+                }
+            }
+        }
+        if(!rangesCopy.isEmpty()){
+            StringBuilder tables = new StringBuilder();
+            for(Range range: rangesCopy){
+               tables.append(range.toString()).append(',');
+            }
+            logger.error("Row in MRI doesn't exist for tables [ "+tables.toString()+"]");
+            throw new MDBCServiceException("MRI row doesn't exist for tables "+tables.toString());
+        }
+        return result;
+    }
+
+    private List<LockResult> lockRow(UUID rowId, List<Range> ranges, DatabasePartition partition)
+        throws MDBCServiceException {
+        List<LockResult> result = new ArrayList<>();
+        if(partition.getMusicRangeInformationIndex()==rowId){
+            result.add(new LockResult(rowId,partition.getLockId(),false));
+            return result;
+        }
+        //\TODO: this function needs to be improved, to track possible changes in the owner of a set of ranges
+        String fullyQualifiedMriKey = music_ns+"."+ this.musicRangeInformationTableName+"."+rowId.toString();
+        //return List<Range> knownRanges, UUID mriIndex, String lockId
+        DatabasePartition newPartition = new DatabasePartition(ranges,rowId,null);
+        return waitForLock(fullyQualifiedMriKey,newPartition);
+    }
+
+    @Override
+    public OwnershipReturn own(List<Range> ranges, DatabasePartition partition) throws MDBCServiceException {
+        UUID newId = generateUniqueKey();
+        return appendRange(newId.toString(),ranges,partition);
+    }
+
+    /**
+     * This function is used to check if we need to create a new row in MRI, beacause one of the new ranges is not contained
+     * @param ranges ranges that should be contained in the partition
+     * @param partition currently own partition
+     * @return
+     */
+    public boolean isAppendRequired(List<Range> ranges, DatabasePartition partition){
+        for(Range r: ranges){
+            if(!partition.isContained(r)){
+                return true;
+            }
+        }
+        return false;
+    }
+
+    private List<UUID> mergeMriRows(String newId, Map<UUID,LockResult> lock, DatabasePartition partition)
+        throws MDBCServiceException {
+        List<UUID> oldIds = new ArrayList<>();
+        List<Range> newRanges = new ArrayList<>();
+        for (Map.Entry<UUID,LockResult> entry : lock.entrySet()) {
+            oldIds.add(entry.getKey());
+            final MusicRangeInformationRow mriRow = getMusicRangeInformation(entry.getKey());
+            final DatabasePartition dbPartition = mriRow.getDBPartition();
+            newRanges.addAll(dbPartition.getSnapshot());
+        }
+        DatabasePartition newPartition = new DatabasePartition(newRanges,UUID.fromString(newId),null);
+        String fullyQualifiedMriKey = music_ns+"."+ this.musicRangeInformationTableName+"."+newId;
+        final List<LockResult> lockResults = waitForLock(fullyQualifiedMriKey, newPartition);
+        if(lockResults.size()!=1||!lockResults.get(0).newLock){
+            logger.error("When merging rows, lock returned an invalid error");
+            throw new MDBCServiceException("When merging MRI rows, lock returned an invalid error");
+        }
+        final LockResult lockResult = lockResults.get(0);
+        partition.updateDatabasePartition(newPartition);
+        createEmptyMriRow(partition.getMusicRangeInformationIndex(),myId,lockResult.ownerId,partition.getSnapshot());
+        return oldIds;
+    }
 
     @Override
-    public HashMap<Range,StagingTable> getTxDigest(MusicTxDigestId id) throws MDBCServiceException {    
-	    String cql = String.format("SELECT * FROM %s.%s WHERE txid = ?;", music_ns, musicTxDigestTableName);
-		PreparedQueryObject pQueryObject = new PreparedQueryObject();
-		pQueryObject.appendQueryString(cql);
-		pQueryObject.addValue(id.txId);
-		Row newRow;
-	    try {
-	        newRow = executeMusicUnlockedQuorumGet(pQueryObject);
-	    } catch (MDBCServiceException e) {
-	        logger.error("Get operation error: Failure to get row from txdigesttable with id:"+id.txId);
-	        throw new MDBCServiceException("Initialization error:Failure to add new row to transaction information");
-	    }
-	    String digest = newRow.getString("transactiondigest");
-	    HashMap<Range,StagingTable> changes;
-	    try {
-	        changes = (HashMap<Range, StagingTable>) MDBCUtils.fromString(digest);
-	    } catch (IOException e) {
-	        logger.error("IOException when deserializing digest failed with an invalid class for id:"+id.txId);
-	        throw new MDBCServiceException("Deserializng digest failed with ioexception");
-	    } catch (ClassNotFoundException e) {
-	        logger.error("Deserializng digest failed with an invalid class for id:"+id.txId);
-	        throw new MDBCServiceException("Deserializng digest failed with an invalid class");
-	    }
-	    return changes;
+    public OwnershipReturn appendRange(String rangeId, List<Range> ranges, DatabasePartition partition)
+        throws MDBCServiceException {
+        if(!isAppendRequired(ranges,partition)){
+            return new OwnershipReturn(partition.getLockId(),UUID.fromString(rangeId),null);
+        }
+        Map<UUID,List<Range>> rows = findRangeRows(ranges);
+        HashMap<UUID,LockResult> rowLock=new HashMap<>();
+        boolean newLock = false;
+        //\TODO: perform this operations in parallel
+        for(Map.Entry<UUID,List<Range>> row : rows.entrySet()){
+            List<LockResult> locks;
+            try {
+                locks = lockRow(row.getKey(),row.getValue(), partition);
+            } catch (MDBCServiceException e) {
+                //TODO: Make a decision if retry or just fail?
+                logger.error("Error locking row");
+                throw e;
+            }
+            for(LockResult l : locks){
+                newLock = newLock || l.getNewLock();
+                rowLock.put(l.getIndex(),l);
+            }
+        }
+        String lockId;
+        List<UUID> oldIds = null;
+        if(rowLock.size()!=1){
+            oldIds = mergeMriRows(rangeId, rowLock, partition);
+            lockId = partition.getLockId();
+        }
+        else{
+            List<LockResult> list = new ArrayList<>(rowLock.values());
+            LockResult lockResult = list.get(0);
+            lockId = lockResult.getOwnerId();
+        }
+
+        return new OwnershipReturn(lockId,UUID.fromString(rangeId),oldIds);
     }
 
     @Override
-    public void own(List<Range> ranges){
-        throw new UnsupportedOperationException();
+    public void relinquish(String ownerId, String rangeId) throws MDBCServiceException{
+        String fullyQualifiedMriKey = music_ns+"."+ musicRangeInformationTableName+"."+rangeId;
+        try {
+            MusicCore.voluntaryReleaseLock(fullyQualifiedMriKey,ownerId);
+        } catch (MusicLockingException e) {
+            throw new MDBCServiceException(e.getMessage());
+        }
+    }
+
+    /**
+     * This function is used to rate the number of times we relinquish at the end of a transaction
+     * @return true if we should try to relinquish, else should avoid relinquishing in this iteration
+     */
+    private boolean canTryRelinquishing(){
+        return true;
     }
 
     @Override
-    public void appendRange(String rangeId, List<Range> ranges){
-        throw new UnsupportedOperationException();
+    public void relinquishIfRequired(DatabasePartition partition) throws MDBCServiceException {
+        if(!canTryRelinquishing() || !partition.isLocked()){
+            return;
+        }
+        CassaLockStore lsHandle;
+        try {
+            lsHandle = MusicCore.getLockingServiceHandle();
+        } catch (MusicLockingException e) {
+            logger.error("Error obtaining the locking service handle when checking if relinquish was required");
+            throw new MDBCServiceException("Error obtaining locking service"+e.getMessage());
+        }
+        long lockQueueSize;
+        try {
+            lockQueueSize = lsHandle.getLockQueueSize(music_ns, this.musicRangeInformationTableName, partition.getMusicRangeInformationIndex().toString());
+        } catch (MusicServiceException|MusicQueryException e) {
+            logger.error("Error obtaining the lock queue size");
+            throw new MDBCServiceException("Error obtaining lock queue size: "+e.getMessage());
+        }
+        if(lockQueueSize> 1){
+            //If there is any other node waiting, we just relinquish ownership
+            try {
+                relinquish(partition.getLockId(),partition.getMusicRangeInformationIndex().toString());
+            } catch (MDBCServiceException e) {
+                logger.error("Error relinquishing lock, will use timeout to solve");
+            }
+            partition.setLockId("");
+        }
     }
 
+    /**
+     * This method executes a write query in Music
+     * @param cql the CQL to be sent to Cassandra
+     */
+    private static void executeMusicWriteQuery(String keyspace, String table, String cql)
+        throws MDBCServiceException {
+        PreparedQueryObject pQueryObject = new PreparedQueryObject();
+        pQueryObject.appendQueryString(cql);
+        ResultType rt = null;
+        try {
+            rt = MusicCore.createTable(keyspace,table,pQueryObject,"critical");
+        } catch (MusicServiceException e) {
+            //\TODO: handle better, at least transform into an MDBCServiceException
+            e.printStackTrace();
+        }
+        String result = rt.getResult();
+        if (result==null || result.toLowerCase().equals("failure")) {
+            throw new MDBCServiceException("Music eventual put failed");
+        }
+    }
+
+    private static Row executeMusicLockedGet(String keyspace, String table, PreparedQueryObject cqlObject, String primaryKey,
+                                             String lock)
+        throws MDBCServiceException{
+        ResultSet result;
+        try {
+            result = MusicCore.criticalGet(keyspace,table,primaryKey,cqlObject,lock);
+        } catch(MusicServiceException e){
+            //\TODO: handle better, at least transform into an MDBCServiceException
+            e.printStackTrace();
+            throw new MDBCServiceException("Error executing critical get");
+        }
+        if(result.isExhausted()){
+            throw new MDBCServiceException("There is not a row that matches the id "+primaryKey);
+        }
+        return result.one();
+    }
+
+    private static Row executeMusicUnlockedQuorumGet(PreparedQueryObject cqlObject)
+        throws MDBCServiceException{
+        ResultSet result = MusicCore.quorumGet(cqlObject);
+        //\TODO: handle better, at least transform into an MDBCServiceException
+        if(result.isExhausted()){
+            throw new MDBCServiceException("There is not a row that matches the query: ["+cqlObject.getQuery()+"]");
+        }
+        return result.one();
+    }
+
+    private void executeMusicLockedPut(String namespace, String tableName,
+                                       String primaryKeyWithoutDomain, PreparedQueryObject queryObject, String lockId,
+                                       MusicCore.Condition conditionInfo) throws MDBCServiceException {
+        ReturnType rt ;
+        if(lockId==null) {
+            try {
+                rt = MusicCore.atomicPut(namespace, tableName, primaryKeyWithoutDomain, queryObject, conditionInfo);
+            } catch (MusicLockingException e) {
+                logger.error("Music locked put failed");
+                throw new MDBCServiceException("Music locked put failed");
+            } catch (MusicServiceException e) {
+                logger.error("Music service fail: Music locked put failed");
+                throw new MDBCServiceException("Music service fail: Music locked put failed");
+            } catch (MusicQueryException e) {
+                logger.error("Music query fail: locked put failed");
+                throw new MDBCServiceException("Music query fail: Music locked put failed");
+            }
+        }
+        else {
+            rt = MusicCore.criticalPut(namespace, tableName, primaryKeyWithoutDomain, queryObject, lockId, conditionInfo);
+        }
+        if (rt.getResult().getResult().toLowerCase().equals("failure")) {
+            throw new MDBCServiceException("Music locked put failed");
+        }
+    }
+
+
     @Override
-    public void relinquish(String ownerId, String rangeId){
-        throw new UnsupportedOperationException();
-    }
-
-	/**
-	 * This method executes a write query in Music
-	 * @param cql the CQL to be sent to Cassandra
-	 */
-	private static void executeMusicWriteQuery(String keyspace, String table, String cql)
-			throws MDBCServiceException {
-	    PreparedQueryObject pQueryObject = new PreparedQueryObject();
-	    pQueryObject.appendQueryString(cql);
-	    ResultType rt = null;
-	    try {
-	        rt = MusicCore.createTable(keyspace,table,pQueryObject,"critical");
-	    } catch (MusicServiceException e) {
-	        //\TODO: handle better, at least transform into an MDBCServiceException
-	        e.printStackTrace();
-	    }
-	    String result = rt.getResult();
-	    if (result==null || result.toLowerCase().equals("failure")) {
-	        throw new MDBCServiceException("Music eventual put failed");
-	    }
-	}
-
-	private static Row executeMusicLockedGet(String keyspace, String table, PreparedQueryObject cqlObject, String primaryKey,
-	                                       String lock)
-	    throws MDBCServiceException{
-	    ResultSet result;
-	    try {
-	        result = MusicCore.criticalGet(keyspace,table,primaryKey,cqlObject,lock);
-	    } catch(MusicServiceException e){
-	        //\TODO: handle better, at least transform into an MDBCServiceException
-	        e.printStackTrace();
-	        throw new MDBCServiceException("Error executing critical get");
-	    }
-	    if(result.isExhausted()){
-	        throw new MDBCServiceException("There is not a row that matches the id "+primaryKey);
-	    }
-	    return result.one();
-	}
-
-	private static Row executeMusicUnlockedQuorumGet(PreparedQueryObject cqlObject)
-	    throws MDBCServiceException{
-	    ResultSet result = MusicCore.quorumGet(cqlObject);
-	        //\TODO: handle better, at least transform into an MDBCServiceException
-	    if(result.isExhausted()){
-	        throw new MDBCServiceException("There is not a row that matches the query: ["+cqlObject.getQuery()+"]");
-	    }
-	    return result.one();
-	}
-
-	private void executeMusicLockedPut(String namespace, String tableName,
-	                                       String primaryKeyWithoutDomain, PreparedQueryObject queryObject, String lockId,
-	                                       MusicCore.Condition conditionInfo) throws MDBCServiceException {
-	    ReturnType rt ;
-	    if(lockId==null) {
-	        try {
-	            rt = MusicCore.atomicPut(namespace, tableName, primaryKeyWithoutDomain, queryObject, conditionInfo);
-	        } catch (MusicLockingException e) {
-	            logger.error("Music locked put failed");
-	            throw new MDBCServiceException("Music locked put failed");
-	        } catch (MusicServiceException e) {
-	            logger.error("Music service fail: Music locked put failed");
-	            throw new MDBCServiceException("Music service fail: Music locked put failed");
-	        } catch (MusicQueryException e) {
-	            logger.error("Music query fail: locked put failed");
-	            throw new MDBCServiceException("Music query fail: Music locked put failed");
-	        }
-	    }
-	    else {
-	        rt = MusicCore.criticalPut(namespace, tableName, primaryKeyWithoutDomain, queryObject, lockId, conditionInfo);
-	    }
-	    if (rt.getResult().getResult().toLowerCase().equals("failure")) {
-	        throw new MDBCServiceException("Music locked put failed");
-	    }
-	}
+    public void replayTransaction(HashMap<Range,StagingTable> digest) throws MDBCServiceException{
+        throw new NotImplementedException("Error, replay transaction in music mixin needs to be implemented");
+    }
 }
diff --git a/mdbc-server/src/main/java/org/onap/music/mdbc/mixins/MySQLMixin.java b/mdbc-server/src/main/java/org/onap/music/mdbc/mixins/MySQLMixin.java
index 15384ad..9a8f543 100755
--- a/mdbc-server/src/main/java/org/onap/music/mdbc/mixins/MySQLMixin.java
+++ b/mdbc-server/src/main/java/org/onap/music/mdbc/mixins/MySQLMixin.java
@@ -38,6 +38,7 @@ import org.json.JSONObject;
 import org.json.JSONTokener;
 
 import org.onap.music.logging.EELFLoggerDelegate;
+import org.onap.music.mdbc.MDBCUtils;
 import org.onap.music.mdbc.Range;
 import org.onap.music.mdbc.TableInfo;
 import org.onap.music.mdbc.tables.Operation;
@@ -49,6 +50,7 @@ import net.sf.jsqlparser.parser.CCJSqlParserUtil;
 import net.sf.jsqlparser.statement.delete.Delete;
 import net.sf.jsqlparser.statement.insert.Insert;
 import net.sf.jsqlparser.statement.update.Update;
+import sun.reflect.generics.reflectiveObjects.NotImplementedException;
 
 /**
  * This class provides the methods that MDBC needs in order to mirror data to/from a
@@ -586,7 +588,7 @@ NEW.field refers to the new value
 						// the actual columns, otherwise performance when doing range queries are going 
 						// to be even worse (see the else bracket down)
                         //
-						String musicKey = mi.generateUniqueKey();
+						String musicKey = MDBCUtils.generateUniqueKey().toString();
 					/*} else {
 						//get key from data
 						musicKey = msm.getMusicKeyFromRowWithoutPrimaryIndexes(tbl,newRow);
@@ -647,7 +649,7 @@ NEW.field refers to the new value
 				 
 				JSONObject jo = new JSONObject();
 				if (!getTableInfo(tableName).hasKey()) {
-						String musicKey = mi.generateUniqueKey();
+						String musicKey = MDBCUtils.generateUniqueKey().toString();
 						jo.put(mi.getMusicDefaultPrimaryKeyName(), musicKey);	
 				}
 					
@@ -690,7 +692,12 @@ NEW.field refers to the new value
 		// 
 		return null;
 	}
-	
+
+
+	public String applyDigest(Map<Range, StagingTable> digest){
+		throw new NotImplementedException();
+	}
+
 	@SuppressWarnings("unused")
 	@Deprecated
 	private ArrayList<String> getMusicKey(String sql) {
@@ -807,7 +814,6 @@ NEW.field refers to the new value
 	/**
 	 * Parse the transaction digest into individual events
 	 * @param transaction - base 64 encoded, serialized digest
-	 * @param dbi 
 	 */
 	public void replayTransaction(HashMap<Range,StagingTable> transaction) throws SQLException {
 		boolean autocommit = jdbcConn.getAutoCommit();
@@ -840,7 +846,7 @@ NEW.field refers to the new value
 	
 	/**
 	 * Replays operation into database, usually from txDigest
-	 * @param stmt
+	 * @param jdbcStmt
 	 * @param r
 	 * @param op
 	 * @throws SQLException 
diff --git a/mdbc-server/src/main/java/org/onap/music/mdbc/query/QueryProcessor.java b/mdbc-server/src/main/java/org/onap/music/mdbc/query/QueryProcessor.java
index bc9a8fc..c14d5c9 100644
--- a/mdbc-server/src/main/java/org/onap/music/mdbc/query/QueryProcessor.java
+++ b/mdbc-server/src/main/java/org/onap/music/mdbc/query/QueryProcessor.java
@@ -21,22 +21,17 @@
 package org.onap.music.mdbc.query;
 
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
 import org.apache.calcite.avatica.util.Casing;
 import org.apache.calcite.avatica.util.Quoting;
-import org.apache.calcite.config.Lex;
 import org.apache.calcite.sql.SqlCall;
-import org.apache.calcite.sql.SqlDialect;
-import org.apache.calcite.sql.SqlIdentifier;
 import org.apache.calcite.sql.SqlInsert;
 import org.apache.calcite.sql.SqlNode;
 import org.apache.calcite.sql.SqlNodeList;
 import org.apache.calcite.sql.SqlSelect;
-import org.apache.calcite.sql.SqlSetOption;
 import org.apache.calcite.sql.SqlUpdate;
 import org.apache.calcite.sql.fun.SqlInOperator;
 import org.apache.calcite.sql.parser.SqlParseException;
@@ -44,7 +39,6 @@ import org.apache.calcite.sql.parser.SqlParser;
 import org.apache.calcite.sql.parser.SqlParserImplFactory;
 import org.apache.calcite.sql.parser.impl.SqlParserImpl;
 import org.apache.calcite.sql.util.SqlBasicVisitor;
-import org.apache.calcite.sql.util.SqlShuttle;
 import org.apache.calcite.sql.validate.SqlConformance;
 import org.apache.calcite.sql.validate.SqlConformanceEnum;
 import org.apache.calcite.util.Util;
diff --git a/mdbc-server/src/main/java/org/onap/music/mdbc/tables/MusicTxDigest.java b/mdbc-server/src/main/java/org/onap/music/mdbc/tables/MusicTxDigest.java
index 7057172..8784a76 100644
--- a/mdbc-server/src/main/java/org/onap/music/mdbc/tables/MusicTxDigest.java
+++ b/mdbc-server/src/main/java/org/onap/music/mdbc/tables/MusicTxDigest.java
@@ -71,25 +71,34 @@ public class MusicTxDigest {
 		DBInterface dbi = ((MdbcConnection) stateManager.getConnection("daemon")).getDBInterface();
 
 		while (true) {
+			Thread.sleep(TimeUnit.SECONDS.toMillis(daemonSleepTimeS));
 			//update
 			logger.info(String.format("[%s] Background MusicTxDigest daemon updating local db",
 					new Timestamp(System.currentTimeMillis())));
 			
 			//1) get all other partitions from musicrangeinformation
-			List<UUID> partitions = mi.getPartitionIndexes();
+			List<UUID> partitions = null;
+			try {
+				partitions = mi.getPartitionIndexes();
+			} catch (MDBCServiceException e) {
+			    logger.error("Error obtainting partition indexes, trying again next iteration");
+			    continue;
+			}
 			//2) for each partition I don't own
-			DatabasePartition myPartition = stateManager.getRanges();
-			for (UUID partition: partitions) {
-				if (!partition.equals(myPartition.getMusicRangeInformationIndex())){
-					try {
-						replayDigestForPartition(mi, partition, dbi);
-					} catch (MDBCServiceException e) {
-						logger.error("Unable to update for partition : " + partition + ". " + e.getMessage());
-						continue;
+			List<DatabasePartition> ranges = stateManager.getRanges();
+			if(ranges.size()!=0) {
+				DatabasePartition myPartition = ranges.get(0);
+				for (UUID partition : partitions) {
+					if (!partition.equals(myPartition.getMusicRangeInformationIndex())) {
+						try {
+							replayDigestForPartition(mi, partition, dbi);
+						} catch (MDBCServiceException e) {
+							logger.error("Unable to update for partition : " + partition + ". " + e.getMessage());
+							continue;
+						}
 					}
 				}
 			}
-			Thread.sleep(TimeUnit.SECONDS.toMillis(daemonSleepTimeS));
 		}
 	}
 	
@@ -100,7 +109,7 @@ public class MusicTxDigest {
 	 * @param dbi interface to the database that will replay the operations
 	 * @throws MDBCServiceException
 	 */
-	public void replayDigestForPartition(MusicInterface mi, UUID partitionId, DBInterface dbi) throws MDBCServiceException {
+	public static void replayDigestForPartition(MusicInterface mi, UUID partitionId, DBInterface dbi) throws MDBCServiceException {
 		List<MusicTxDigestId> partitionsRedoLogTxIds = mi.getMusicRangeInformation(partitionId).getRedoLog();
 		for (MusicTxDigestId txId: partitionsRedoLogTxIds) {
 			HashMap<Range, StagingTable> transaction = mi.getTxDigest(txId);
diff --git a/mdbc-server/src/main/java/org/onap/music/mdbc/tables/Operation.java b/mdbc-server/src/main/java/org/onap/music/mdbc/tables/Operation.java
index 0870be9..dc1bcce 100755
--- a/mdbc-server/src/main/java/org/onap/music/mdbc/tables/Operation.java
+++ b/mdbc-server/src/main/java/org/onap/music/mdbc/tables/Operation.java
@@ -24,6 +24,8 @@ import java.io.Serializable;
 import org.json.JSONObject;
 import org.json.JSONTokener;
 
+import static java.util.Objects.hash;
+
 public final class Operation implements Serializable{
 
 	private static final long serialVersionUID = -1215301985078183104L;
@@ -53,6 +55,11 @@ public final class Operation implements Serializable{
     }
 
     @Override
+    public int hashCode(){
+        return hash(TYPE,NEW_VAL);
+    }
+
+    @Override
     public boolean equals(Object o){
         if (this == o) return true;
         if (o == null || getClass() != o.getClass()) return false;
diff --git a/mdbc-server/src/main/java/org/onap/music/mdbc/tests/MAIN.java b/mdbc-server/src/main/java/org/onap/music/mdbc/tests/MAIN.java
index 348d891..3de4b7a 100755
--- a/mdbc-server/src/main/java/org/onap/music/mdbc/tests/MAIN.java
+++ b/mdbc-server/src/main/java/org/onap/music/mdbc/tests/MAIN.java
@@ -25,10 +25,10 @@ import java.lang.reflect.Constructor;
 import java.util.ArrayList;
 import java.util.List;
 
-import org.apache.log4j.Logger;
 import org.json.JSONArray;
 import org.json.JSONObject;
 import org.json.JSONTokener;
+import org.onap.music.logging.EELFLoggerDelegate;
 
 /**
  * Run all the tests against all the configurations specified in /tests.json.
@@ -86,7 +86,8 @@ public class MAIN {
 		}
 	}
 	public void run() {
-		Logger logger = Logger.getLogger(this.getClass());
+
+		EELFLoggerDelegate logger = EELFLoggerDelegate.getLogger(this.getClass());
 		for (int ix = 0; ix < configs.length(); ix++) {
 			JSONObject config = configs.getJSONObject(ix);
 			int succ = 0, fail = 0;
diff --git a/mdbc-server/src/test/java/org/onap/music/mdbc/MdbcConnectionTest.java b/mdbc-server/src/test/java/org/onap/music/mdbc/MdbcConnectionTest.java
new file mode 100644
index 0000000..776a06e
--- /dev/null
+++ b/mdbc-server/src/test/java/org/onap/music/mdbc/MdbcConnectionTest.java
@@ -0,0 +1,16 @@
+package org.onap.music.mdbc;
+
+import static org.junit.Assert.*;
+
+import org.junit.Test;
+
+public class MdbcConnectionTest {
+
+    @Test
+    public void own() {
+    }
+
+    @Test
+    public void relinquishIfRequired() {
+    }
+}
\ No newline at end of file
diff --git a/mdbc-server/src/test/java/org/onap/music/mdbc/TestUtils.java b/mdbc-server/src/test/java/org/onap/music/mdbc/TestUtils.java
index 3f8bd65..4d32b83 100755
--- a/mdbc-server/src/test/java/org/onap/music/mdbc/TestUtils.java
+++ b/mdbc-server/src/test/java/org/onap/music/mdbc/TestUtils.java
@@ -19,14 +19,124 @@
  */
 package org.onap.music.mdbc;
 
+import com.datastax.driver.core.*;
+import com.datastax.driver.core.exceptions.QueryExecutionException;
+import com.datastax.driver.core.exceptions.SyntaxError;
+import org.onap.music.datastore.CassaDataStore;
+import org.onap.music.logging.EELFLoggerDelegate;
 import org.onap.music.main.MusicUtil;
 
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.Properties;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.*;
+
+import static junit.framework.TestCase.assertNotNull;
+import static junit.framework.TestCase.fail;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
 
 public class TestUtils {
 
+    private static EELFLoggerDelegate logger = EELFLoggerDelegate.getLogger(TestUtils.class);
+
+    public static void createKeyspace(String keyspace, Session session) {
+        String queryOp = "CREATE KEYSPACE " +
+                keyspace +
+                " WITH REPLICATION " +
+                "= {'class':'SimpleStrategy', 'replication_factor':1}; ";
+        ResultSet res=null;
+        try {
+            res = session.execute(queryOp);
+        }
+        catch(QueryExecutionException e){
+            fail("Failure executing creation of keyspace with error: " + e.getMessage());
+        } catch(SyntaxError e){
+            fail("Failure executing creation of keyspace with syntax error: " + e.getMessage());
+        }
+        assertTrue("Keyspace "+keyspace+" is already being used, please change it to avoid loosing data",res.wasApplied());
+    }
+
+    public static void deleteKeyspace(String keyspace, Session session){
+        String queryBuilder = "DROP KEYSPACE " +
+                keyspace +
+                ";";
+        ResultSet res = session.execute(queryBuilder);
+        assertTrue("Keyspace "+keyspace+" doesn't exist and it should",res.wasApplied());
+    }
+
+    public static HashSet<String> getMriColNames(){
+        return new HashSet<>(
+                Arrays.asList("rangeid","keys","txredolog","ownerid","metricprocessid")
+        );
+    }
+
+    public static HashSet<String> getMtdColNames(){
+        return new HashSet<>(
+                Arrays.asList("txid","transactiondigest")
+        );
+    }
+
+    public static HashMap<String, DataType> getMriColTypes(Cluster cluster){
+        HashMap<String, DataType> expectedTypes = new HashMap<>();
+        expectedTypes.put("rangeid",DataType.uuid());
+        expectedTypes.put("keys",DataType.set(DataType.text()));
+        ProtocolVersion currentVer =  cluster.getConfiguration().getProtocolOptions().getProtocolVersion();
+        assertNotNull("Protocol version for cluster is invalid", currentVer);
+        CodecRegistry registry = cluster.getConfiguration().getCodecRegistry();
+        assertNotNull("Codec registry for cluster is invalid", registry);
+        expectedTypes.put("txredolog",DataType.list(TupleType.of(currentVer,registry,DataType.text(),DataType.uuid())));
+        expectedTypes.put("ownerid",DataType.text());
+        expectedTypes.put("metricprocessid",DataType.text());
+        return expectedTypes;
+    }
+
+    public static HashMap<String, DataType> getMtdColTypes(){
+        HashMap<String,DataType> expectedTypes = new HashMap<>();
+        expectedTypes.put("txid",DataType.uuid());
+        expectedTypes.put("transactiondigest",DataType.text());
+        return expectedTypes;
+    }
+
+
+    public static void checkRowsInTable(String keyspace, String tableName, CassaDataStore ds,
+                                        HashSet<String> expectedColumns, HashMap<String,DataType> expectedTypes){
+        TableMetadata table = ds.returnColumnMetadata(keyspace,tableName);
+        assertNotNull("Error obtaining metadata of table, there may be an error with its creation", table);
+        List<ColumnMetadata> columnsMeta = table.getColumns();
+        checkDataTypeForTable(columnsMeta,expectedColumns,expectedTypes);
+    }
+
+    public static void checkDataTypeForTable(List<ColumnMetadata> columnsMeta, HashSet<String> expectedColumns,
+                               HashMap<String,DataType> expectedTypes){
+        for(ColumnMetadata cMeta : columnsMeta){
+            String columnName = cMeta.getName();
+            DataType type = cMeta.getType();
+            assertTrue("Invalid column name: "+columnName,expectedColumns.contains(columnName));
+            assertTrue("Fix the contents of expectedtypes for column: "+columnName,
+                    expectedTypes.containsKey(columnName));
+            assertEquals("Invalid type for column: "+columnName,
+                    expectedTypes.get(columnName),type);
+        }
+    }
+
+    public static void readPropertiesFile(Properties prop) {
+        try {
+            String fileLocation = MusicUtil.getMusicPropertiesFilePath();
+            InputStream fstream = new FileInputStream(fileLocation);
+            prop.load(fstream);
+            fstream.close();
+        } catch (FileNotFoundException e) {
+            logger.error("Configuration file not found");
+
+        } catch (IOException e) {
+            // TODO Auto-generated catch block
+            logger.error("Exception when reading file: "+e.toString());
+        }
+    }
+
+
     public static void populateMusicUtilsWithProperties(Properties prop){
         //TODO: Learn how to do this properly within music
         String[] propKeys = MusicUtil.getPropkeys();
diff --git a/mdbc-server/src/test/java/org/onap/music/mdbc/mixins/MusicMixinTest.java b/mdbc-server/src/test/java/org/onap/music/mdbc/mixins/MusicMixinTest.java
new file mode 100644
index 0000000..7e0e4c8
--- /dev/null
+++ b/mdbc-server/src/test/java/org/onap/music/mdbc/mixins/MusicMixinTest.java
@@ -0,0 +1,193 @@
+package org.onap.music.mdbc.mixins;
+
+import static org.junit.Assert.*;
+
+import com.datastax.driver.core.Cluster;
+import com.datastax.driver.core.Session;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Properties;
+import java.util.UUID;
+import org.cassandraunit.utils.EmbeddedCassandraServerHelper;
+
+
+import org.junit.AfterClass;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.onap.music.datastore.CassaDataStore;
+import org.onap.music.datastore.MusicLockState;
+import org.onap.music.exceptions.MDBCServiceException;
+import org.onap.music.exceptions.MusicLockingException;
+import org.onap.music.exceptions.MusicQueryException;
+import org.onap.music.exceptions.MusicServiceException;
+import org.onap.music.main.MusicCore;
+import org.onap.music.mdbc.DatabasePartition;
+import org.onap.music.mdbc.Range;
+import org.onap.music.mdbc.tables.MusicRangeInformationRow;
+import org.onap.music.mdbc.tables.MusicTxDigestId;
+
+public class MusicMixinTest {
+
+    final private static String keyspace="metricmusictest";
+    final private static String mriTableName = "musicrangeinformation";
+    final private static String mtdTableName = "musictxdigest";
+    final private static String mdbcServerName = "name";
+
+    //Properties used to connect to music
+    private static Cluster cluster;
+    private static Session session;
+    private static String cassaHost = "localhost";
+    private static MusicMixin mixin = null;
+
+    @BeforeClass
+    public static void init() throws MusicServiceException {
+        try {
+            EmbeddedCassandraServerHelper.startEmbeddedCassandra();
+        } catch (Exception e) {
+            System.out.println(e);
+        }
+
+        cluster = new Cluster.Builder().addContactPoint(cassaHost).withPort(9142).build();
+        cluster.getConfiguration().getSocketOptions().setReadTimeoutMillis(20000);
+        assertNotNull("Invalid configuration for cassandra", cluster);
+        session = cluster.connect();
+        assertNotNull("Invalid configuration for cassandra", session);
+        CassaDataStore store = new CassaDataStore(cluster, session);
+        assertNotNull("Invalid configuration for music", store);
+        MusicCore.mDstoreHandle = store;
+        try {
+            Properties properties = new Properties();
+            properties.setProperty(MusicMixin.KEY_MUSIC_NAMESPACE,keyspace);
+            properties.setProperty(MusicMixin.KEY_MY_ID,mdbcServerName);
+            mixin=new MusicMixin(mdbcServerName,properties);
+        } catch (MDBCServiceException e) {
+            fail("error creating music mixin");
+        }
+    }
+
+    @AfterClass
+    public static void close() throws MusicServiceException, MusicQueryException {
+        //TODO: shutdown cassandra
+        session.close();
+        cluster.close();
+    }
+
+    @Test
+    public void own() {
+        final UUID uuid = mixin.generateUniqueKey();
+        List<Range> ranges = new ArrayList<>();
+        ranges.add(new Range("table1"));
+        DatabasePartition dbPartition = new DatabasePartition(ranges,uuid,null);
+        MusicRangeInformationRow newRow = new MusicRangeInformationRow(dbPartition, new ArrayList<>(), "", mdbcServerName);
+        DatabasePartition partition=null;
+        try {
+            partition = mixin.createMusicRangeInformation(newRow);
+        } catch (MDBCServiceException e) {
+            fail("failure when creating new row");
+        }
+        String fullyQualifiedMriKey = keyspace+"."+ mriTableName+"."+partition.getMusicRangeInformationIndex().toString();
+        try {
+            MusicLockState musicLockState = MusicCore.voluntaryReleaseLock(fullyQualifiedMriKey, partition.getLockId());
+        } catch (MusicLockingException e) {
+            fail("failure when releasing lock");
+        }
+        DatabasePartition newPartition = new DatabasePartition();
+        try {
+            mixin.own(ranges,newPartition);
+        } catch (MDBCServiceException e) {
+            fail("failure when running own function");
+        }
+    }
+
+    @Test
+    public void own2() {
+        final UUID uuid = mixin.generateUniqueKey();
+        final UUID uuid2 = mixin.generateUniqueKey();
+        List<Range> ranges = new ArrayList<>();
+        List<Range> ranges2 = new ArrayList<>();
+        ranges.add(new Range("table1"));
+        ranges2.add(new Range("table2"));
+        DatabasePartition dbPartition = new DatabasePartition(ranges,uuid,null);
+        DatabasePartition dbPartition2 = new DatabasePartition(ranges2,uuid2,null);
+        MusicRangeInformationRow newRow = new MusicRangeInformationRow(dbPartition, new ArrayList<>(), "", mdbcServerName);
+        MusicRangeInformationRow newRow2 = new MusicRangeInformationRow(dbPartition2, new ArrayList<>(), "", mdbcServerName);
+        DatabasePartition partition=null;
+        DatabasePartition partition2=null;
+        try {
+            partition = mixin.createMusicRangeInformation(newRow);
+            partition2 = mixin.createMusicRangeInformation(newRow2);
+        } catch (MDBCServiceException e) {
+            fail("failure when creating new row");
+        }
+        String fullyQualifiedMriKey = keyspace+"."+ mriTableName+"."+partition.getMusicRangeInformationIndex().toString();
+        String fullyQualifiedMriKey2 = keyspace+"."+ mriTableName+"."+partition2.getMusicRangeInformationIndex().toString();
+        try {
+            MusicLockState musicLockState = MusicCore.voluntaryReleaseLock(fullyQualifiedMriKey, partition.getLockId());
+            MusicLockState musicLockState2 = MusicCore.voluntaryReleaseLock(fullyQualifiedMriKey2, partition2.getLockId());
+        } catch (MusicLockingException e) {
+            fail("failure when releasing lock");
+        }
+        DatabasePartition newPartition = new DatabasePartition();
+        MusicInterface.OwnershipReturn ownershipReturn=null;
+        try {
+            List<Range> ownRanges = new ArrayList<>();
+            ownRanges.add(new Range("table1"));
+            ownRanges.add(new Range("table2"));
+            ownershipReturn  = mixin.own(ownRanges, newPartition);
+        } catch (MDBCServiceException e) {
+            fail("failure when running own function");
+        }
+        assertEquals(2,ownershipReturn.getOldIRangeds().size());
+        assertEquals(ownershipReturn.getOwnerId(),newPartition.getLockId());
+        assertTrue(ownershipReturn.getOldIRangeds().get(0).equals(partition.getMusicRangeInformationIndex())||
+            ownershipReturn.getOldIRangeds().get(1).equals(partition.getMusicRangeInformationIndex()));
+        assertTrue(ownershipReturn.getOldIRangeds().get(0).equals(partition2.getMusicRangeInformationIndex())||
+            ownershipReturn.getOldIRangeds().get(1).equals(partition2.getMusicRangeInformationIndex()));
+        String finalfullyQualifiedMriKey = keyspace+"."+ mriTableName+"."+newPartition.getMusicRangeInformationIndex().toString();
+        try {
+            List<String> lockQueue = MusicCore.getLockingServiceHandle().getLockQueue(keyspace, mriTableName,
+                newPartition.getMusicRangeInformationIndex().toString());
+            assertEquals(1,lockQueue.size());
+            assertEquals(lockQueue.get(0),newPartition.getLockId());
+        } catch (MusicServiceException|MusicQueryException|MusicLockingException e) {
+            fail("failure on getting queue");
+        }
+        MusicRangeInformationRow musicRangeInformation=null;
+        try {
+             musicRangeInformation= mixin.getMusicRangeInformation(newPartition.getMusicRangeInformationIndex());
+        } catch (MDBCServiceException e) {
+            fail("fail to retrieve row");
+        }
+        assertEquals(2,musicRangeInformation.getDBPartition().getSnapshot().size());
+        assertEquals(0,musicRangeInformation.getRedoLog().size());
+        assertEquals(newPartition.getLockId(),musicRangeInformation.getOwnerId());
+        assertEquals(mdbcServerName,musicRangeInformation.getMetricProcessId());
+        List<Range> snapshot = musicRangeInformation.getDBPartition().getSnapshot();
+        boolean containsTable1=false;
+        Range table1Range = new Range("table1");
+        for(Range r:snapshot){
+            if(r.overlaps(table1Range)){
+                containsTable1=true;
+                break;
+            }
+        }
+        assertTrue(containsTable1);
+        boolean containsTable2=false;
+        Range table2Range = new Range("table2");
+        for(Range r:snapshot){
+            if(r.overlaps(table2Range)){
+                containsTable2=true;
+                break;
+            }
+        }
+        assertTrue(containsTable2);
+    }
+
+    @Test
+    public void relinquish() {
+    }
+
+    @Test
+    public void relinquishIfRequired() {
+    }
+}
\ No newline at end of file