Merge "Even more unit test and code cleanup"

2 files changed, 499 insertions, 501 deletions

diff --git a/datarouter-prov/src/main/java/org/onap/dmaap/datarouter/provisioning/beans/Parameters.java b/datarouter-prov/src/main/java/org/onap/dmaap/datarouter/provisioning/beans/Parameters.java
index fff10ac7..357444e4 100644
--- a/datarouter-prov/src/main/java/org/onap/dmaap/datarouter/provisioning/beans/Parameters.java
+++ b/datarouter-prov/src/main/java/org/onap/dmaap/datarouter/provisioning/beans/Parameters.java
@@ -57,6 +57,7 @@ public class Parameters extends Syncable {
     public static final String PROV_POKETIMER2 = "PROV_POKETIMER2";

     public static final String PROV_SPECIAL_SUBNET = "PROV_SPECIAL_SUBNET";

     public static final String PROV_LOG_RETENTION = "PROV_LOG_RETENTION";

+    public static final String DEFAULT_LOG_RETENTION = "DEFAULT_LOG_RETENTION";

     public static final String NODES = "NODES";

     public static final String ACTIVE_POD = "ACTIVE_POD";

     public static final String STANDBY_POD = "STANDBY_POD";

diff --git a/datarouter-prov/src/main/java/org/onap/dmaap/datarouter/provisioning/utils/LogfileLoader.java b/datarouter-prov/src/main/java/org/onap/dmaap/datarouter/provisioning/utils/LogfileLoader.java
index 3ba1a151..c78a5b10 100644
--- a/datarouter-prov/src/main/java/org/onap/dmaap/datarouter/provisioning/utils/LogfileLoader.java
+++ b/datarouter-prov/src/main/java/org/onap/dmaap/datarouter/provisioning/utils/LogfileLoader.java
@@ -1,501 +1,498 @@
-/*******************************************************************************

- * ============LICENSE_START==================================================

- * * org.onap.dmaap

- * * ===========================================================================

- * * Copyright © 2017 AT&T Intellectual Property. All rights reserved.

- * * ===========================================================================

- * * 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.

- * * See the License for the specific language governing permissions and

- * * limitations under the License.

- * * ============LICENSE_END====================================================

- * *

- * * ECOMP is a trademark and service mark of AT&T Intellectual Property.

- * *

- ******************************************************************************/

-

-

-package org.onap.dmaap.datarouter.provisioning.utils;

-

-import java.io.File;

-import java.io.FileInputStream;

-import java.io.FileNotFoundException;

-import java.io.FileReader;

-import java.io.FilenameFilter;

-import java.io.IOException;

-import java.io.InputStreamReader;

-import java.io.LineNumberReader;

-import java.io.Reader;

-import java.sql.Connection;

-import java.sql.PreparedStatement;

-import java.sql.ResultSet;

-import java.sql.SQLException;

-import java.sql.Statement;

-import java.text.ParseException;

-import java.util.Date;

-import java.util.HashMap;

-import java.util.Iterator;

-import java.util.Map;

-import java.util.TreeSet;

-import java.util.zip.GZIPInputStream;

-

-import com.att.eelf.configuration.EELFLogger;

-import com.att.eelf.configuration.EELFManager;

-import org.onap.dmaap.datarouter.provisioning.BaseServlet;

-import org.onap.dmaap.datarouter.provisioning.beans.DeliveryExtraRecord;

-import org.onap.dmaap.datarouter.provisioning.beans.DeliveryRecord;

-import org.onap.dmaap.datarouter.provisioning.beans.ExpiryRecord;

-import org.onap.dmaap.datarouter.provisioning.beans.Loadable;

-import org.onap.dmaap.datarouter.provisioning.beans.LogRecord;

-import org.onap.dmaap.datarouter.provisioning.beans.Parameters;

-import org.onap.dmaap.datarouter.provisioning.beans.PubFailRecord;

-import org.onap.dmaap.datarouter.provisioning.beans.PublishRecord;

-

-/**

- * This class provides methods that run in a separate thread, in order to process logfiles uploaded into the spooldir.

- * These logfiles are loaded into the MariaDB LOG_RECORDS table. In a running provisioning server, there should only be

- * two places where records can be loaded into this table; here, and in the method DB.retroFit4() which may be run at

- * startup to load the old (1.0) style log tables into LOG_RECORDS;

- * <p>This method maintains an {@link RLEBitSet} which can be used to easily see what records are presently in the

- * database.

- * This bit set is used to synchronize between provisioning servers.</p>

- *

- * @author Robert Eby

- * @version $Id: LogfileLoader.java,v 1.22 2014/03/12 19:45:41 eby Exp $

- */

-public class LogfileLoader extends Thread {

-    /**

-     * Default number of log records to keep when pruning.  Keep 10M by default.

-     */

-    public static final long DEFAULT_LOG_RETENTION = 10000000L;

-    /**

-     * NOT USED: Percentage of free space required before old records are removed.

-     */

-    public static final int REQUIRED_FREE_PCT = 20;

-

-    /**

-     * This is a singleton -- there is only one LogfileLoader object in the server

-     */

-    private static LogfileLoader logfileLoader;

-

-    /**

-     * Get the singleton LogfileLoader object, and start it if it is not running.

-     *

-     * @return the LogfileLoader

-     */

-    public static synchronized LogfileLoader getLoader() {

-        if (logfileLoader == null)

-            logfileLoader = new LogfileLoader();

-        if (!logfileLoader.isAlive())

-            logfileLoader.start();

-        return logfileLoader;

-    }

-

-    /**

-     * The PreparedStatement which is loaded by a <i>Loadable</i>.

-     */

-    public static final String INSERT_SQL = "insert into LOG_RECORDS values (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)";

-    /**

-     * Each server can assign this many IDs

-     */

-    private static final long SET_SIZE = (1L << 56);

-

-    private final EELFLogger logger;

-    private final DB db;

-    private final String spooldir;

-    private final long set_start;

-    private final long set_end;

-    private RLEBitSet seq_set;

-    private long nextid;

-    private boolean idle;

-

-    private LogfileLoader() {

-        this.logger = EELFManager.getInstance().getLogger("InternalLog");

-        this.db = new DB();

-        this.spooldir = db.getProperties().getProperty("org.onap.dmaap.datarouter.provserver.spooldir");

-        this.set_start = getIdRange();

-        this.set_end = set_start + SET_SIZE - 1;

-        this.seq_set = new RLEBitSet();

-        this.nextid = 0;

-        this.idle = false;

-

-        // This is a potentially lengthy operation, so has been moved to run()

-        //initializeNextid();

-        this.setDaemon(true);

-        this.setName("LogfileLoader");

-    }

-

-    private long getIdRange() {

-        long n;

-        if (BaseServlet.isInitialActivePOD())

-            n = 0;

-        else if (BaseServlet.isInitialStandbyPOD())

-            n = SET_SIZE;

-        else

-            n = SET_SIZE * 2;

-        String r = String.format("[%X .. %X]", n, n + SET_SIZE - 1);

-        logger.debug("This server shall assign RECORD_IDs in the range " + r);

-        return n;

-    }

-

-    /**

-     * Return the bit set representing the record ID's that are loaded in this database.

-     *

-     * @return the bit set

-     */

-    public RLEBitSet getBitSet() {

-        return seq_set;

-    }

-

-    /**

-     * True if the LogfileLoader is currently waiting for work.

-     *

-     * @return true if idle

-     */

-    public boolean isIdle() {

-        return idle;

-    }

-

-    /**

-     * Run continuously to look for new logfiles in the spool directory and import them into the DB.

-     * The spool is checked once per second.  If free space on the MariaDB filesystem falls below

-     * REQUIRED_FREE_PCT (normally 20%) then the oldest logfile entries are removed and the LOG_RECORDS

-     * table is compacted until free space rises above the threshold.

-     */

-    @Override

-    public void run() {

-        initializeNextid();    // moved from the constructor

-        while (true) {

-            try {

-                File dirfile = new File(spooldir);

-                while (true) {

-                    // process IN files

-                    File[] infiles = dirfile.listFiles(new FilenameFilter() {

-                        @Override

-                        public boolean accept(File dir, String name) {

-                            return name.startsWith("IN.");

-                        }

-                    });

-

-                    if (infiles.length == 0) {

-                        idle = true;

-                        try {

-                            Thread.sleep(1000L);

-                        } catch (InterruptedException e) {

-                            Thread.currentThread().interrupt();

-                        }

-                        idle = false;

-                    } else {

-                        // Remove old rows

-                        if (pruneRecords()) {

-                            // Removed at least some entries, recompute the bit map

-                            initializeNextid();

-                        }

-

-                        // Process incoming logfiles

-                        for (File f : infiles) {

-                            if (logger.isDebugEnabled())

-                                logger.debug("PROV8001 Starting " + f + " ...");

-                            long time = System.currentTimeMillis();

-                            int[] n = process(f);

-                            time = System.currentTimeMillis() - time;

-                            logger.info(String

-                                    .format("PROV8000 Processed %s in %d ms; %d of %d records.",

-                                            f.toString(), time, n[0], n[1]));

-                            f.delete();

-                        }

-                    }

-                }

-            } catch (Exception e) {

-                logger.warn("PROV0020: Caught exception in LogfileLoader: " + e);

-            }

-        }

-    }

-

-    boolean pruneRecords() {

-        boolean did1 = false;

-        long count = countRecords();

-        long threshold = DEFAULT_LOG_RETENTION;

-        Parameters param = Parameters.getParameter(Parameters.PROV_LOG_RETENTION);

-        if (param != null) {

-            try {

-                long n = Long.parseLong(param.getValue());

-                // This check is to prevent inadvertent errors from wiping the table out

-                if (n > 1000000L)

-                    threshold = n;

-            } catch (NumberFormatException e) {

-                // ignore

-            }

-        }

-        logger.debug("Pruning LOG_RECORD table: records in DB=" + count + ", threshold=" + threshold);

-        if (count > threshold) {

-            count -= threshold;                        // we need to remove this many records;

-            Map<Long, Long> hist = getHistogram();    // histogram of records per day

-            // Determine the cutoff point to remove the needed number of records

-            long sum = 0;

-            long cutoff = 0;

-            for (Long day : new TreeSet<Long>(hist.keySet())) {

-                sum += hist.get(day);

-                cutoff = day;

-                if (sum >= count)

-                    break;

-            }

-            cutoff++;

-            cutoff *= 86400000L;        // convert day to ms

-            logger.debug("  Pruning records older than=" + (cutoff / 86400000L) + " (" + new Date(cutoff) + ")");

-

-            Connection conn = null;

-            try {

-                // Limit to a million at a time to avoid typing up the DB for too long.

-                conn = db.getConnection();

-                try(PreparedStatement ps = conn.prepareStatement("DELETE from LOG_RECORDS where EVENT_TIME < ? limit 1000000")) {

-                    ps.setLong(1, cutoff);

-                    while (count > 0) {

-                        if (!ps.execute()) {

-                            int dcount = ps.getUpdateCount();

-                            count -= dcount;

-                            logger.debug("  " + dcount + " rows deleted.");

-                            did1 |= (dcount != 0);

-                            if (dcount == 0)

-                                count = 0;    // prevent inf. loops

-                        } else {

-                            count = 0;    // shouldn't happen!

-                        }

-                    }

-                }

-             try(Statement stmt = conn.createStatement()) {

-                 stmt.execute("OPTIMIZE TABLE LOG_RECORDS");

-             }

-            } catch (SQLException e) {

-                System.err.println(e);

-                logger.error(e.toString());

-            } finally {

-                db.release(conn);

-            }

-        }

-        return did1;

-    }

-

-    long countRecords() {

-        long count = 0;

-        Connection conn = null;

-        try {

-            conn = db.getConnection();

-           try(Statement stmt = conn.createStatement()) {

-               try(ResultSet rs = stmt.executeQuery("SELECT COUNT(*) as COUNT from LOG_RECORDS")) {

-                   if (rs.next()) {

-                       count = rs.getLong("COUNT");

-                   }

-               }

-           }

-         } catch (SQLException e) {

-            System.err.println(e);

-            logger.error(e.toString());

-        } finally {

-            db.release(conn);

-        }

-        return count;

-    }

-

-    Map<Long, Long> getHistogram() {

-        Map<Long, Long> map = new HashMap<Long, Long>();

-        Connection conn = null;

-        try {

-            logger.debug("  LOG_RECORD table histogram...");

-            conn = db.getConnection();

-            try(Statement stmt = conn.createStatement()) {

-                try(ResultSet rs = stmt.executeQuery("SELECT FLOOR(EVENT_TIME/86400000) AS DAY, COUNT(*) AS COUNT FROM LOG_RECORDS GROUP BY DAY")) {

-                    while (rs.next()) {

-                        long day = rs.getLong("DAY");

-                        long cnt = rs.getLong("COUNT");

-                        map.put(day, cnt);

-                        logger.debug("  " + day + "  " + cnt);

-                    }

-                }

-            }

-           } catch (SQLException e) {

-            System.err.println(e);

-            logger.error(e.toString());

-        } finally {

-            db.release(conn);

-        }

-        return map;

-    }

-

-    private void initializeNextid() {

-        Connection conn = null;

-        try {

-            conn = db.getConnection();

-            RLEBitSet nbs = new RLEBitSet();

-            try(Statement stmt = conn.createStatement()) {

-                // Build a bitset of all records in the LOG_RECORDS table

-                // We need to run this SELECT in stages, because otherwise we run out of memory!

-                final long stepsize = 6000000L;

-                boolean go_again = true;

-                for (long i = 0; go_again; i += stepsize) {

-                    String sql = String.format("select RECORD_ID from LOG_RECORDS LIMIT %d,%d", i, stepsize);

-                    try (ResultSet rs = stmt.executeQuery(sql)) {

-                        go_again = false;

-                        while (rs.next()) {

-                            long n = rs.getLong("RECORD_ID");

-                            nbs.set(n);

-                            go_again = true;

-                        }

-                    }

-                }

-            }

-            seq_set = nbs;

-            // Compare with the range for this server

-            // Determine the next ID for this set of record IDs

-            RLEBitSet tbs = (RLEBitSet) nbs.clone();

-            RLEBitSet idset = new RLEBitSet();

-            idset.set(set_start, set_start + SET_SIZE);

-            tbs.and(idset);

-            long t = tbs.length();

-            nextid = (t == 0) ? set_start : (t - 1);

-            if (nextid >= set_start + SET_SIZE) {

-                // Handle wraparound, when the IDs reach the end of our "range"

-                Long[] last = null;

-                Iterator<Long[]> li = tbs.getRangeIterator();

-                while (li.hasNext()) {

-                    last = li.next();

-                }

-                if (last != null) {

-                    tbs.clear(last[0], last[1] + 1);

-                    t = tbs.length();

-                    nextid = (t == 0) ? set_start : (t - 1);

-                }

-            }

-            logger.debug(String.format("initializeNextid, next ID is %d (%x)", nextid, nextid));

-        } catch (SQLException e) {

-            System.err.println(e);

-            logger.error(e.toString());

-        } finally {

-            db.release(conn);

-        }

-    }

-

-    @SuppressWarnings("resource")

-    int[] process(File f) {

-        int ok = 0, total = 0;

-        try {

-            Connection conn = db.getConnection();

-            PreparedStatement ps = conn.prepareStatement(INSERT_SQL);

-            Reader r = f.getPath().endsWith(".gz")

-                    ? new InputStreamReader(new GZIPInputStream(new FileInputStream(f)))

-                    : new FileReader(f);

-            try(LineNumberReader in = new LineNumberReader(r)) {

-                String line;

-                while ((line = in.readLine()) != null) {

-                    try {

-                        for (Loadable rec : buildRecords(line)) {

-                            rec.load(ps);

-                            if (rec instanceof LogRecord) {

-                                LogRecord lr = ((LogRecord) rec);

-                                if (!seq_set.get(lr.getRecordId())) {

-                                    ps.executeUpdate();

-                                    seq_set.set(lr.getRecordId());

-                                } else

-                                    logger.debug("Duplicate record ignored: " + lr.getRecordId());

-                            } else {

-                                if (++nextid > set_end)

-                                    nextid = set_start;

-                                ps.setLong(18, nextid);

-                                ps.executeUpdate();

-                                seq_set.set(nextid);

-                            }

-                            ps.clearParameters();

-                            ok++;

-                        }

-                    } catch (SQLException e) {

-                        logger.warn("PROV8003 Invalid value in record: " + line);

-                        logger.debug(e.toString(), e);

-                    } catch (NumberFormatException e) {

-                        logger.warn("PROV8004 Invalid number in record: " + line);

-                        logger.debug(e.toString());

-                    } catch (ParseException e) {

-                        logger.warn("PROV8005 Invalid date in record: " + line);

-                        logger.debug(e.toString());

-                    } catch (Exception e) {

-                        logger.warn("PROV8006 Invalid pattern in record: " + line);

-                        logger.debug(e.toString(), e);

-                    }

-                    total++;

-                }

-            }

-            ps.close();

-            db.release(conn);

-            conn = null;

-        } catch (FileNotFoundException e) {

-            logger.warn("PROV8007 Exception reading " + f + ": " + e);

-        } catch (IOException e) {

-            logger.warn("PROV8007 Exception reading " + f + ": " + e);

-        } catch (SQLException e) {

-            logger.warn("PROV8007 Exception reading " + f + ": " + e);

-        }

-        return new int[]{ok, total};

-    }

-

-    Loadable[] buildRecords(String line) throws ParseException {

-        String[] pp = line.split("\\|");

-        if (pp != null && pp.length >= 7) {

-            String rtype = pp[1].toUpperCase();

-            if (rtype.equals("PUB") && pp.length == 11) {

-                // Fields are: date|PUB|pubid|feedid|requrl|method|ctype|clen|srcip|user|status

-                return new Loadable[]{new PublishRecord(pp)};

-            }

-            if (rtype.equals("DEL") && pp.length == 12) {

-                // Fields are: date|DEL|pubid|feedid|subid|requrl|method|ctype|clen|user|status|xpubid

-                String[] subs = pp[4].split("\\s+");

-                if (subs != null) {

-                    Loadable[] rv = new Loadable[subs.length];

-                    for (int i = 0; i < subs.length; i++) {

-                        // create a new record for each individual sub

-                        pp[4] = subs[i];

-                        rv[i] = new DeliveryRecord(pp);

-                    }

-                    return rv;

-                }

-            }

-            if (rtype.equals("EXP") && pp.length == 11) {

-                // Fields are: date|EXP|pubid|feedid|subid|requrl|method|ctype|clen|reason|attempts

-                ExpiryRecord e = new ExpiryRecord(pp);

-                if (e.getReason().equals("other"))

-                    logger.info("Invalid reason '" + pp[9] + "' changed to 'other' for record: " + e.getPublishId());

-                return new Loadable[]{e};

-            }

-            if (rtype.equals("PBF") && pp.length == 12) {

-                // Fields are: date|PBF|pubid|feedid|requrl|method|ctype|clen-expected|clen-received|srcip|user|error

-                return new Loadable[]{new PubFailRecord(pp)};

-            }

-            if (rtype.equals("DLX") && pp.length == 7) {

-                // Fields are: date|DLX|pubid|feedid|subid|clen-tosend|clen-sent

-                return new Loadable[]{new DeliveryExtraRecord(pp)};

-            }

-            if (rtype.equals("LOG") && (pp.length == 19 || pp.length == 20)) {

-                // Fields are: date|LOG|pubid|feedid|requrl|method|ctype|clen|type|feedFileid|remoteAddr|user|status|subid|fileid|result|attempts|reason|record_id

-                return new Loadable[]{new LogRecord(pp)};

-            }

-        }

-        logger.warn("PROV8002 bad record: " + line);

-        return new Loadable[0];

-    }

-

-    /**

-     * The LogfileLoader can be run stand-alone by invoking the main() method of this class.

-     *

-     * @param a ignored

-     * @throws InterruptedException

-     */

-    public static void main(String[] a) throws InterruptedException {

-        LogfileLoader.getLoader();

-        Thread.sleep(200000L);

-    }

-}

+/*******************************************************************************
+ * ============LICENSE_START==================================================
+ * * org.onap.dmaap
+ * * ===========================================================================
+ * * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
+ * * ===========================================================================
+ * * 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.
+ * * See the License for the specific language governing permissions and
+ * * limitations under the License.
+ * * ============LICENSE_END====================================================
+ * *
+ * * ECOMP is a trademark and service mark of AT&T Intellectual Property.
+ * *
+ ******************************************************************************/
+
+
+package org.onap.dmaap.datarouter.provisioning.utils;
+
+import com.att.eelf.configuration.EELFLogger;
+import com.att.eelf.configuration.EELFManager;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.LineNumberReader;
+import java.io.Reader;
+import java.nio.file.Files;
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Statement;
+import java.text.ParseException;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.Map;
+import java.util.TreeSet;
+import java.util.zip.GZIPInputStream;
+import org.onap.dmaap.datarouter.provisioning.BaseServlet;
+import org.onap.dmaap.datarouter.provisioning.beans.DeliveryExtraRecord;
+import org.onap.dmaap.datarouter.provisioning.beans.DeliveryRecord;
+import org.onap.dmaap.datarouter.provisioning.beans.ExpiryRecord;
+import org.onap.dmaap.datarouter.provisioning.beans.Loadable;
+import org.onap.dmaap.datarouter.provisioning.beans.LogRecord;
+import org.onap.dmaap.datarouter.provisioning.beans.Parameters;
+import org.onap.dmaap.datarouter.provisioning.beans.PubFailRecord;
+import org.onap.dmaap.datarouter.provisioning.beans.PublishRecord;
+
+/**
+ * This class provides methods that run in a separate thread, in order to process logfiles uploaded into the spooldir.
+ * These logfiles are loaded into the MariaDB LOG_RECORDS table. In a running provisioning server, there should only be
+ * two places where records can be loaded into this table; here, and in the method DB.retroFit4() which may be run at
+ * startup to load the old (1.0) style log tables into LOG_RECORDS;
+ * <p>This method maintains an {@link RLEBitSet} which can be used to easily see what records are presently in the
+ * database.
+ * This bit set is used to synchronize between provisioning servers.</p>
+ *
+ * @author Robert Eby
+ * @version $Id: LogfileLoader.java,v 1.22 2014/03/12 19:45:41 eby Exp $
+ */
+public class LogfileLoader extends Thread {
+    /**
+     * NOT USED: Percentage of free space required before old records are removed.
+     */
+    public static final int REQUIRED_FREE_PCT = 20;
+
+    /**
+     * This is a singleton -- there is only one LogfileLoader object in the server.
+     */
+    private static LogfileLoader logfileLoader;
+
+    /**
+     * The PreparedStatement which is loaded by a <i>Loadable</i>.
+     */
+    private static final String INSERT_SQL = "insert into LOG_RECORDS values (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)";
+    /**
+     * Each server can assign this many IDs.
+     */
+    private static final long SET_SIZE = (1L << 56);
+
+    private final EELFLogger logger;
+    private final DB db;
+    private final String spooldir;
+    private final long setStart;
+    private final long setEnd;
+    private RLEBitSet seqSet;
+    private long nextId;
+    private boolean idle;
+
+    /**
+     * Get the singleton LogfileLoader object, and start it if it is not running.
+     *
+     * @return the LogfileLoader
+     */
+    public static synchronized LogfileLoader getLoader() {
+        if (logfileLoader == null) {
+            logfileLoader = new LogfileLoader();
+        }
+        if (!logfileLoader.isAlive()) {
+            logfileLoader.start();
+        }
+        return logfileLoader;
+    }
+
+
+    private LogfileLoader() {
+        this.logger = EELFManager.getInstance().getLogger("InternalLog");
+        this.db = new DB();
+        this.spooldir = db.getProperties().getProperty("org.onap.dmaap.datarouter.provserver.spooldir");
+        this.setStart = getIdRange();
+        this.setEnd = setStart + SET_SIZE - 1;
+        this.seqSet = new RLEBitSet();
+        this.nextId = 0;
+        this.idle = false;
+        this.setDaemon(true);
+        this.setName("LogfileLoader");
+    }
+
+    private long getIdRange() {
+        long n;
+        if (BaseServlet.isInitialActivePOD()) {
+            n = 0;
+        } else if (BaseServlet.isInitialStandbyPOD()) {
+            n = SET_SIZE;
+        } else {
+            n = SET_SIZE * 2;
+        }
+        String r = String.format("[%X .. %X]", n, n + SET_SIZE - 1);
+        logger.debug("This server shall assign RECORD_IDs in the range " + r);
+        return n;
+    }
+
+    /**
+     * Return the bit set representing the record ID's that are loaded in this database.
+     *
+     * @return the bit set
+     */
+    public RLEBitSet getBitSet() {
+        return seqSet;
+    }
+
+    /**
+     * True if the LogfileLoader is currently waiting for work.
+     *
+     * @return true if idle
+     */
+    public boolean isIdle() {
+        return idle;
+    }
+
+    /**
+     * Run continuously to look for new logfiles in the spool directory and import them into the DB.
+     * The spool is checked once per second.  If free space on the MariaDB filesystem falls below
+     * REQUIRED_FREE_PCT (normally 20%) then the oldest logfile entries are removed and the LOG_RECORDS
+     * table is compacted until free space rises above the threshold.
+     */
+    @Override
+    public void run() {
+        initializeNextid();
+        while (true) {
+            try {
+                File dirfile = new File(spooldir);
+                while (true) {
+                    runLogFileLoad(dirfile);
+                }
+            } catch (Exception e) {
+                logger.warn("PROV0020: Caught exception in LogfileLoader: " + e);
+            }
+        }
+    }
+
+    private void runLogFileLoad(File filesDir) {
+        File[] inFiles = filesDir.listFiles((dir, name) -> name.startsWith("IN."));
+        if (inFiles != null) {
+            if (inFiles.length == 0) {
+                idle = true;
+                try {
+                    Thread.sleep(1000L);
+                } catch (InterruptedException e) {
+                    Thread.currentThread().interrupt();
+                }
+                idle = false;
+            } else {
+                // Remove old rows
+                if (pruneRecords()) {
+                    // Removed at least some entries, recompute the bit map
+                    initializeNextid();
+                }
+                for (File file : inFiles) {
+                    processFile(file);
+                }
+            }
+        }
+    }
+
+    private void processFile(File infile) {
+        if (logger.isDebugEnabled()) {
+            logger.debug("PROV8001 Starting " + infile + " ...");
+        }
+        long time = System.currentTimeMillis();
+        int[] n = process(infile);
+        time = System.currentTimeMillis() - time;
+        logger.info(String.format("PROV8000 Processed %s in %d ms; %d of %d records.",
+                infile.toString(), time, n[0], n[1]));
+        try {
+            Files.delete(infile.toPath());
+        } catch (IOException e) {
+            logger.info("PROV8001 failed to delete file " + infile.getName(), e);
+        }
+    }
+
+    boolean pruneRecords() {
+        boolean did1 = false;
+        long count = countRecords();
+        Parameters defaultLogRetention = Parameters.getParameter(Parameters.DEFAULT_LOG_RETENTION);
+        long threshold = (defaultLogRetention != null) ? Long.parseLong(defaultLogRetention.getValue()) : 1000000L;
+        Parameters provLogRetention = Parameters.getParameter(Parameters.PROV_LOG_RETENTION);
+        if (provLogRetention != null) {
+            try {
+                long n = Long.parseLong(provLogRetention.getValue());
+                // This check is to prevent inadvertent errors from wiping the table out
+                if (n > 1000000L) {
+                    threshold = n;
+                }
+            } catch (NumberFormatException e) {
+                // ignore
+            }
+        }
+        logger.debug("Pruning LOG_RECORD table: records in DB=" + count + ", threshold=" + threshold);
+        if (count > threshold) {
+            // we need to remove this many records
+            count -= threshold;
+            // histogram of records per day
+            Map<Long, Long> hist = getHistogram();
+            // Determine the cutoff point to remove the needed number of records
+            long sum = 0;
+            long cutoff = 0;
+            for (Long day : new TreeSet<>(hist.keySet())) {
+                sum += hist.get(day);
+                cutoff = day;
+                if (sum >= count) {
+                    break;
+                }
+            }
+            cutoff++;
+            // convert day to ms
+            cutoff *= 86400000L;
+            logger.debug("  Pruning records older than=" + (cutoff / 86400000L) + " (" + new Date(cutoff) + ")");
+
+            Connection conn = null;
+            try {
+                // Limit to a million at a time to avoid typing up the DB for too long.
+                conn = db.getConnection();
+                try (PreparedStatement ps = conn.prepareStatement("DELETE from LOG_RECORDS where EVENT_TIME < ? limit 1000000")) {
+                    ps.setLong(1, cutoff);
+                    while (count > 0) {
+                        if (!ps.execute()) {
+                            int dcount = ps.getUpdateCount();
+                            count -= dcount;
+                            logger.debug("  " + dcount + " rows deleted.");
+                            did1 |= (dcount != 0);
+                            if (dcount == 0) {
+                                count = 0;    // prevent inf. loops
+                            }
+                        } else {
+                            count = 0;    // shouldn't happen!
+                        }
+                    }
+                }
+                try (Statement stmt = conn.createStatement()) {
+                    stmt.execute("OPTIMIZE TABLE LOG_RECORDS");
+                }
+            } catch (SQLException e) {
+                logger.error(e.toString());
+            } finally {
+                db.release(conn);
+            }
+        }
+        return did1;
+    }
+
+    long countRecords() {
+        long count = 0;
+        Connection conn = null;
+        try {
+            conn = db.getConnection();
+            try (Statement stmt = conn.createStatement()) {
+                try (ResultSet rs = stmt.executeQuery("SELECT COUNT(*) as COUNT from LOG_RECORDS")) {
+                    if (rs.next()) {
+                        count = rs.getLong("COUNT");
+                    }
+                }
+            }
+        } catch (SQLException e) {
+            logger.error(e.toString());
+        } finally {
+            db.release(conn);
+        }
+        return count;
+    }
+
+    Map<Long, Long> getHistogram() {
+        Map<Long, Long> map = new HashMap<>();
+        Connection conn = null;
+        try {
+            logger.debug("  LOG_RECORD table histogram...");
+            conn = db.getConnection();
+            try (Statement stmt = conn.createStatement()) {
+                try (ResultSet rs = stmt.executeQuery("SELECT FLOOR(EVENT_TIME/86400000) AS DAY, COUNT(*) AS COUNT FROM LOG_RECORDS GROUP BY DAY")) {
+                    while (rs.next()) {
+                        long day = rs.getLong("DAY");
+                        long cnt = rs.getLong("COUNT");
+                        map.put(day, cnt);
+                        logger.debug("  " + day + "  " + cnt);
+                    }
+                }
+            }
+        } catch (SQLException e) {
+            logger.error(e.toString());
+        } finally {
+            db.release(conn);
+        }
+        return map;
+    }
+
+    private void initializeNextid() {
+        Connection conn = null;
+        try {
+            conn = db.getConnection();
+            RLEBitSet nbs = new RLEBitSet();
+            try (Statement stmt = conn.createStatement()) {
+                // Build a bitset of all records in the LOG_RECORDS table
+                // We need to run this SELECT in stages, because otherwise we run out of memory!
+                final long stepsize = 6000000L;
+                boolean goAgain = true;
+                for (long i = 0; goAgain; i += stepsize) {
+                    String sql = String.format("select RECORD_ID from LOG_RECORDS LIMIT %d,%d", i, stepsize);
+                    try (ResultSet rs = stmt.executeQuery(sql)) {
+                        goAgain = false;
+                        while (rs.next()) {
+                            long n = rs.getLong("RECORD_ID");
+                            nbs.set(n);
+                            goAgain = true;
+                        }
+                    }
+                }
+            }
+            seqSet = nbs;
+            // Compare with the range for this server
+            // Determine the next ID for this set of record IDs
+            RLEBitSet tbs = (RLEBitSet) nbs.clone();
+            RLEBitSet idset = new RLEBitSet();
+            idset.set(setStart, setStart + SET_SIZE);
+            tbs.and(idset);
+            long t = tbs.length();
+            nextId = (t == 0) ? setStart : (t - 1);
+            if (nextId >= setStart + SET_SIZE) {
+                // Handle wraparound, when the IDs reach the end of our "range"
+                Long[] last = null;
+                Iterator<Long[]> li = tbs.getRangeIterator();
+                while (li.hasNext()) {
+                    last = li.next();
+                }
+                if (last != null) {
+                    tbs.clear(last[0], last[1] + 1);
+                    t = tbs.length();
+                    nextId = (t == 0) ? setStart : (t - 1);
+                }
+            }
+            logger.debug(String.format("initializeNextid, next ID is %d (%x)", nextId, nextId));
+        } catch (SQLException e) {
+            logger.error(e.toString());
+        } finally {
+            db.release(conn);
+        }
+    }
+
+    @SuppressWarnings("resource")
+    int[] process(File f) {
+        int ok = 0;
+        int total = 0;
+        try {
+            Connection conn = db.getConnection();
+            PreparedStatement ps = conn.prepareStatement(INSERT_SQL);
+            Reader r = f.getPath().endsWith(".gz")
+                               ? new InputStreamReader(new GZIPInputStream(new FileInputStream(f)))
+                               : new FileReader(f);
+            try (LineNumberReader in = new LineNumberReader(r)) {
+                String line;
+                while ((line = in.readLine()) != null) {
+                    try {
+                        for (Loadable rec : buildRecords(line)) {
+                            rec.load(ps);
+                            if (rec instanceof LogRecord) {
+                                LogRecord lr = ((LogRecord) rec);
+                                if (!seqSet.get(lr.getRecordId())) {
+                                    ps.executeUpdate();
+                                    seqSet.set(lr.getRecordId());
+                                } else {
+                                    logger.debug("Duplicate record ignored: " + lr.getRecordId());
+                                }
+                            } else {
+                                if (++nextId > setEnd) {
+                                    nextId = setStart;
+                                }
+                                ps.setLong(18, nextId);
+                                ps.executeUpdate();
+                                seqSet.set(nextId);
+                            }
+                            ps.clearParameters();
+                            ok++;
+                        }
+                    } catch (SQLException e) {
+                        logger.warn("PROV8003 Invalid value in record: " + line, e);
+                    } catch (NumberFormatException e) {
+                        logger.warn("PROV8004 Invalid number in record: " + line, e);
+                    } catch (ParseException e) {
+                        logger.warn("PROV8005 Invalid date in record: " + line, e);
+                    } catch (Exception e) {
+                        logger.warn("PROV8006 Invalid pattern in record: " + line, e);
+                    }
+                    total++;
+                }
+            }
+            ps.close();
+            db.release(conn);
+        } catch (SQLException | IOException e) {
+            logger.warn("PROV8007 Exception reading " + f + ": " + e);
+        }
+        return new int[]{ok, total};
+    }
+
+    Loadable[] buildRecords(String line) throws ParseException {
+        String[] pp = line.split("\\|");
+        if (pp != null && pp.length >= 7) {
+            String rtype = pp[1].toUpperCase();
+            if ("PUB".equals(rtype) && pp.length == 11) {
+                // Fields are: date|PUB|pubid|feedid|requrl|method|ctype|clen|srcip|user|status
+                return new Loadable[]{new PublishRecord(pp)};
+            }
+            if ("DEL".equals(rtype) && pp.length == 12) {
+                // Fields are: date|DEL|pubid|feedid|subid|requrl|method|ctype|clen|user|status|xpubid
+                String[] subs = pp[4].split("\\s+");
+                if (subs != null) {
+                    Loadable[] rv = new Loadable[subs.length];
+                    for (int i = 0; i < subs.length; i++) {
+                        // create a new record for each individual sub
+                        pp[4] = subs[i];
+                        rv[i] = new DeliveryRecord(pp);
+                    }
+                    return rv;
+                }
+            }
+            if ("EXP".equals(rtype) && pp.length == 11) {
+                // Fields are: date|EXP|pubid|feedid|subid|requrl|method|ctype|clen|reason|attempts
+                ExpiryRecord e = new ExpiryRecord(pp);
+                if ("other".equals(e.getReason())) {
+                    logger.info("Invalid reason '" + pp[9] + "' changed to 'other' for record: " + e.getPublishId());
+                }
+                return new Loadable[]{e};
+            }
+            if ("PBF".equals(rtype) && pp.length == 12) {
+                // Fields are: date|PBF|pubid|feedid|requrl|method|ctype|clen-expected|clen-received|srcip|user|error
+                return new Loadable[]{new PubFailRecord(pp)};
+            }
+            if ("DLX".equals(rtype) && pp.length == 7) {
+                // Fields are: date|DLX|pubid|feedid|subid|clen-tosend|clen-sent
+                return new Loadable[]{new DeliveryExtraRecord(pp)};
+            }
+            if ("LOG".equals(rtype) && (pp.length == 19 || pp.length == 20)) {
+                // Fields are: date|LOG|pubid|feedid|requrl|method|ctype|clen|type|feedFileid|remoteAddr|user|status|subid|fileid|result|attempts|reason|record_id
+                return new Loadable[]{new LogRecord(pp)};
+            }
+        }
+        logger.warn("PROV8002 bad record: " + line);
+        return new Loadable[0];
+    }
+
+    /**
+     * The LogfileLoader can be run stand-alone by invoking the main() method of this class.
+     *
+     * @param a ignored
+     */
+    public static void main(String[] a) throws InterruptedException {
+        LogfileLoader.getLoader();
+        Thread.sleep(200000L);
+    }
+}