Upgrade parents to 2.5.4-SNAPSHOT

Code changes as a result of changes induced by ODL Chlorine SR1

Issue-ID: CCSDK-3856
Signed-off-by: Ravi Pendurty <ravi.pendurty@highstreet-technologies.com>
Change-Id: Ic08786f050e58bdb8371c8f8c25fb0db9f258cd4
Signed-off-by: Ravi Pendurty <ravi.pendurty@highstreet-technologies.com>

23 files changed, 317 insertions, 671 deletions

diff --git a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/elasticsearch/EsDataObjectReaderWriter2.java b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/elasticsearch/EsDataObjectReaderWriter2.java
index a10864c96..dbb73bdad 100644
--- a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/elasticsearch/EsDataObjectReaderWriter2.java
+++ b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/elasticsearch/EsDataObjectReaderWriter2.java
@@ -28,7 +28,6 @@ import java.lang.reflect.InvocationTargetException;
 import java.util.List;
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
-import org.eclipse.jdt.annotation.NonNull;
 import org.onap.ccsdk.features.sdnr.wt.common.database.DatabaseClient;
 import org.onap.ccsdk.features.sdnr.wt.common.database.SearchHit;
 import org.onap.ccsdk.features.sdnr.wt.common.database.SearchResult;
@@ -36,7 +35,6 @@ import org.onap.ccsdk.features.sdnr.wt.common.database.queries.QueryBuilder;
 import org.onap.ccsdk.features.sdnr.wt.yang.mapper.YangToolsMapper2;
 import org.onap.ccsdk.features.sdnr.wt.yang.mapper.YangToolsMapperHelper;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.Entity;
-import org.opendaylight.yangtools.concepts.Builder;
 import org.opendaylight.yangtools.yang.binding.DataObject;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -60,7 +58,7 @@ public class EsDataObjectReaderWriter2<T extends DataObject> {
     private String dataTypeName;
 
     /** Elasticsearch Database client to be used **/
-    private DatabaseClient db;
+    protected DatabaseClient db;
 
     /** Mapper with configuration to use opendaylight yang-tools builder pattern for object creation **/
     private YangToolsMapper2<T> yangtoolsMapper;
diff --git a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/elasticsearch/data/acessor/DataObjectAcessor.java b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/elasticsearch/data/acessor/DataObjectAcessor.java
index ec467eab1..8319d5d4f 100644
--- a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/elasticsearch/data/acessor/DataObjectAcessor.java
+++ b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/elasticsearch/data/acessor/DataObjectAcessor.java
@@ -57,4 +57,5 @@ public class DataObjectAcessor<T extends DataObject> extends EsDataObjectReaderW
         SearchResult<T> result = doReadAll(queryBuilder, ignoreException);
         return new QueryResult<>(queryByFilter, result);
     }
+
 }
diff --git a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/elasticsearch/data/acessor/DataObjectAcessorInventory.java b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/elasticsearch/data/acessor/DataObjectAcessorInventory.java
new file mode 100644
index 000000000..622333403
--- /dev/null
+++ b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/elasticsearch/data/acessor/DataObjectAcessorInventory.java
@@ -0,0 +1,81 @@
+/*
+ * ============LICENSE_START=======================================================
+ * ONAP : ccsdk features
+ * ================================================================================
+ * Copyright (C) 2019 highstreet technologies GmbH 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=========================================================
+ *
+ */
+package org.onap.ccsdk.features.sdnr.wt.dataprovider.database.elasticsearch.data.acessor;
+
+import java.io.IOException;
+import org.onap.ccsdk.features.sdnr.wt.common.database.ExtRestClient;
+import org.onap.ccsdk.features.sdnr.wt.common.database.HtDatabaseClient;
+import org.onap.ccsdk.features.sdnr.wt.common.database.SearchResult;
+import org.onap.ccsdk.features.sdnr.wt.common.database.requests.SearchRequest;
+import org.onap.ccsdk.features.sdnr.wt.common.database.responses.AggregationEntries;
+import org.onap.ccsdk.features.sdnr.wt.common.database.responses.SearchResponse;
+import org.onap.ccsdk.features.sdnr.wt.dataprovider.database.elasticsearch.data.rpctypehelper.QueryByFilter;
+import org.onap.ccsdk.features.sdnr.wt.dataprovider.database.elasticsearch.data.rpctypehelper.QueryResult;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.Entity;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.EntityInput;
+import org.opendaylight.yangtools.yang.binding.DataObject;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class DataObjectAcessorInventory<T extends DataObject> extends DataObjectAcessorWithId<T> {
+
+    private final Logger LOG = LoggerFactory.getLogger(DataObjectAcessorInventory.class);
+
+    private static final String KEY = "node-id";
+
+    private ExtRestClient dbClient;
+
+    public DataObjectAcessorInventory(HtDatabaseClient dbClient, Entity entity, Class<T> clazz,
+                                      boolean doFullsizeRequest) throws ClassNotFoundException {
+        super(dbClient, entity, clazz, doFullsizeRequest);
+        LOG.info("Create DataObjectAcessorInventory");
+        this.dbClient = dbClient;
+    }
+
+
+    /**
+     * get aggregated devices list
+     *
+     * @param input filter should be empty/no filter handled, only sortorder for KEY ('node-name')
+     * @return
+     * @throws IOException
+     */
+    public QueryResult<String> getDataDeviceList(EntityInput input) {
+
+        QueryByFilter queryByFilter = new QueryByFilter(input);
+        SearchRequest request =
+                queryByFilter.getSearchRequestAggregated(KEY,this.getDataTypeName(), this.getDataTypeName(), this.doFullsizeRequest);
+        try {
+            SearchResponse response = this.dbClient.search(request);
+            AggregationEntries aggs = response.getAggregations(KEY);
+            String[] uuids =
+                    aggs.getKeysAsPagedStringList(queryByFilter.getPageSize(), queryByFilter.getPageStartIndex());
+            long totalSize = aggs.size();
+            return new QueryResult<String>(queryByFilter.getPage(), queryByFilter.getPageSize(),
+                    new SearchResult<String>(uuids, totalSize));
+        } catch (IOException e) {
+            throw new RuntimeException("problem reading nodes for req=" + request, e);
+        }
+
+    }
+
+}
diff --git a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/elasticsearch/data/acessor/DataObjectAcessorPm.java b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/elasticsearch/data/acessor/DataObjectAcessorPm.java
index 04849004f..8e04db07b 100644
--- a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/elasticsearch/data/acessor/DataObjectAcessorPm.java
+++ b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/elasticsearch/data/acessor/DataObjectAcessorPm.java
@@ -72,7 +72,7 @@ public class DataObjectAcessorPm<T extends DataObject> extends DataObjectAcessor
     public DataObjectAcessorPm(HtDatabaseClient dbClient, Intervall mode, Entity entity, Class<T> clazz,
             boolean doFullsizeRequest) throws ClassNotFoundException {
         super(dbClient, entity, clazz, doFullsizeRequest);
-        LOG.info("DataObjectAcessorPm");
+        LOG.info("Create DataObjectAcessorPm");
         this.dbClient = dbClient;
         this.mode = mode;
     }
@@ -113,7 +113,7 @@ public class DataObjectAcessorPm<T extends DataObject> extends DataObjectAcessor
 
         QueryByFilter queryByFilter = new QueryByFilter(input);
         SearchRequest request =
-                queryByFilter.getSearchRequestBySortOrder(NODE_KEY, UUID_KEY, mode.getIndex(), mode.getType(), this.doFullsizeRequest);
+                queryByFilter.getSearchRequestAggregated(NODE_KEY, mode.getIndex(), mode.getType(), this.doFullsizeRequest);
         try {
             SearchResponse response = this.dbClient.search(request);
             AggregationEntries aggs = response.getAggregations(KEY);
diff --git a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/elasticsearch/data/entity/FaultEntityManager.java b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/elasticsearch/data/entity/FaultEntityManager.java
index 64156dc07..708467d0d 100644
--- a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/elasticsearch/data/entity/FaultEntityManager.java
+++ b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/elasticsearch/data/entity/FaultEntityManager.java
@@ -21,8 +21,6 @@
  */
 package org.onap.ccsdk.features.sdnr.wt.dataprovider.database.elasticsearch.data.entity;
 
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
 import javax.annotation.Nonnull;
 import org.onap.ccsdk.features.sdnr.wt.dataprovider.database.sqldb.data.entity.DatabaseIdGenerator;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.Fault;
@@ -38,7 +36,7 @@ public class FaultEntityManager {
 
     /**
      * Specific problems are not moving into current problem list
-     * 
+     *
      * @param problemName to be verified
      * @return true if problem is current
      */
@@ -52,7 +50,7 @@ public class FaultEntityManager {
 
     /**
      * Specific problems are not moving into current problem list
-     * 
+     *
      * @param fault to be verified
      * @return true if cleared indication
      */
@@ -62,7 +60,7 @@ public class FaultEntityManager {
 
     /**
      * Create a specific ES id for the current log.
-     * 
+     *
      * @return a string with the generated ES Id
      */
     public static String genSpecificEsId(String nodeName, String objectId, String problemName) {
@@ -80,7 +78,7 @@ public class FaultEntityManager {
 
     /**
      * Create Es id
-     * 
+     *
      * @param fault used to create uuid for faultcurrent
      * @return String with Id
      */
diff --git a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/elasticsearch/data/entity/HtDatabaseEventsService.java b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/elasticsearch/data/entity/HtDatabaseEventsService.java
index 9cfe4e50d..8367a87d3 100644
--- a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/elasticsearch/data/entity/HtDatabaseEventsService.java
+++ b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/elasticsearch/data/entity/HtDatabaseEventsService.java
@@ -38,7 +38,6 @@ import org.onap.ccsdk.features.sdnr.wt.common.database.queries.BoolQueryBuilder;
 import org.onap.ccsdk.features.sdnr.wt.common.database.queries.QueryBuilder;
 import org.onap.ccsdk.features.sdnr.wt.common.database.queries.QueryBuilders;
 import org.onap.ccsdk.features.sdnr.wt.common.database.queries.RangeQueryBuilder;
-import org.onap.ccsdk.features.sdnr.wt.dataprovider.database.DatabaseDataProvider;
 import org.onap.ccsdk.features.sdnr.wt.dataprovider.database.elasticsearch.EsDataObjectReaderWriter2;
 import org.onap.ccsdk.features.sdnr.wt.dataprovider.model.ArchiveCleanProvider;
 import org.onap.ccsdk.features.sdnr.wt.dataprovider.model.DataInconsistencyException;
@@ -97,16 +96,11 @@ public class HtDatabaseEventsService implements ArchiveCleanProvider, DataProvid
     private final EsDataObjectReaderWriter2<GuicutthroughEntity> guiCutThroughDB;
     private final EsDataObjectReaderWriter2<PmdataEntity> pmData15mDB;
     private final EsDataObjectReaderWriter2<PmdataEntity> pmData24hDB;
-
-    @SuppressWarnings("unused")
-    private final DatabaseDataProvider dataProvider;
     // --- Construct and initialize
 
-    public HtDatabaseEventsService(HtDatabaseClient client, DatabaseDataProvider elasticSearchDataProvider)
-            throws Exception {
+    public HtDatabaseEventsService(HtDatabaseClient client) throws Exception {
 
         LOG.info("Create {} start", HtDatabaseEventsService.class);
-        this.dataProvider = elasticSearchDataProvider;
 
         try {
             // Create control structure
@@ -124,8 +118,8 @@ public class HtDatabaseEventsService implements ArchiveCleanProvider, DataProvid
             eventRWFaultLogDB = new EsDataObjectReaderWriter2<>(client, Entity.Faultlog, FaultlogEntity.class,
                     FaultlogBuilder.class);
 
-            eventRWFCMLogDB = new EsDataObjectReaderWriter2<>(client, Entity.Cmlog, CmlogEntity.class,
-                CmlogBuilder.class);
+            eventRWFCMLogDB =
+                    new EsDataObjectReaderWriter2<>(client, Entity.Cmlog, CmlogEntity.class, CmlogBuilder.class);
 
             eventRWConnectionLogDB = new EsDataObjectReaderWriter2<>(client, Entity.Connectionlog,
                     ConnectionlogEntity.class, ConnectionlogBuilder.class);
@@ -460,7 +454,7 @@ public class HtDatabaseEventsService implements ArchiveCleanProvider, DataProvid
     @Override
     public boolean updateNetworkConnection22(NetworkElementConnectionEntity networkElementConnectionEntitiy,
             String nodeId) {
-        LOG.info("update networkelement-connection for {} with data {}", nodeId, networkElementConnectionEntitiy);
+        LOG.debug("update networkelement-connection for {} with data {}", nodeId, networkElementConnectionEntitiy);
         return this.networkelementConnectionDB.updateOrCreate(networkElementConnectionEntitiy, nodeId,
                 Arrays.asList("is-required", "username", "password")) != null;
         // NetworkElementConnectionEntity e =
@@ -530,7 +524,7 @@ public class HtDatabaseEventsService implements ArchiveCleanProvider, DataProvid
         QueryBuilder queryFaultLog = EsFaultLogDevicemanager.getQueryForTimeStamp(netconfTimeStamp);
         numberOfElements += eventRWFaultLogDB.doReadAll(queryFaultLog).getTotal();
 
-       QueryBuilder queryCMLog = EsCMLogDevicemanager.getQueryForTimeStamp(netconfTimeStamp);
+        QueryBuilder queryCMLog = EsCMLogDevicemanager.getQueryForTimeStamp(netconfTimeStamp);
         numberOfElements += eventRWFCMLogDB.doReadAll(queryCMLog).getTotal();
 
         return numberOfElements;
diff --git a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/elasticsearch/data/entity/HtDatabaseMaintenanceService.java b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/elasticsearch/data/entity/HtDatabaseMaintenanceService.java
index 9f4c0f399..c280f4fb3 100644
--- a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/elasticsearch/data/entity/HtDatabaseMaintenanceService.java
+++ b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/elasticsearch/data/entity/HtDatabaseMaintenanceService.java
@@ -80,7 +80,7 @@ public class HtDatabaseMaintenanceService implements HtDatabaseMaintenance {
             if (maintenanceRW.write(m, m.getNodeId()) == null) {
                 throw new IllegalArgumentException("Problem writing to database: " + m.getId());
             }
-            LOG.info("Wrote maintenance object {}", m.toString());
+            LOG.debug("Wrote maintenance object {}", m.toString());
         }
         return m;
     }
diff --git a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/elasticsearch/data/rpctypehelper/QueryByFilter.java b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/elasticsearch/data/rpctypehelper/QueryByFilter.java
index 69f9bcc29..51584484b 100644
--- a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/elasticsearch/data/rpctypehelper/QueryByFilter.java
+++ b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/elasticsearch/data/rpctypehelper/QueryByFilter.java
@@ -130,16 +130,16 @@ public class QueryByFilter {
         }
     }
 
-    public SearchRequest getSearchRequestBySortOrder(String nodeKey, String uuidKey, String index, String dataType,
-            boolean doFullsizeRequest) {
-        Sortorder soNode = getSortOrder(sortOrder, nodeKey);
+    public SearchRequest getSearchRequestAggregated(String aggregationKey, String index, String dataType,
+                                                    boolean doFullsizeRequest) {
+        Sortorder soNode = getSortOrder(sortOrder, aggregationKey);
         SearchRequest request = new SearchRequest(index, dataType);
         QueryBuilder query = null;
         if (soNode != null) {
             query = QueryBuilders.matchAllQuery().setFullsizeRequest(doFullsizeRequest)
-                    .aggregations(nodeKey, convert(soNode.getSortorder())).size(0);
+                    .aggregations(aggregationKey, convert(soNode.getSortorder())).size(0);
         } else {
-            query = QueryBuilders.matchAllQuery().setFullsizeRequest(doFullsizeRequest).aggregations(nodeKey).size(0);
+            query = QueryBuilders.matchAllQuery().setFullsizeRequest(doFullsizeRequest).aggregations(aggregationKey).size(0);
         }
         request.setQuery(query);
         return request;
diff --git a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/elasticsearch/impl/ElasticSearchDataProvider.java b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/elasticsearch/impl/ElasticSearchDataProvider.java
index 753930cdd..71372275a 100644
--- a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/elasticsearch/impl/ElasticSearchDataProvider.java
+++ b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/elasticsearch/impl/ElasticSearchDataProvider.java
@@ -29,8 +29,8 @@ import java.util.List;
 import java.util.concurrent.TimeUnit;
 import org.onap.ccsdk.features.sdnr.wt.common.database.HtDatabaseClient;
 import org.onap.ccsdk.features.sdnr.wt.common.database.config.HostInfo;
-import org.onap.ccsdk.features.sdnr.wt.dataprovider.database.DatabaseDataProvider;
 import org.onap.ccsdk.features.sdnr.wt.dataprovider.database.elasticsearch.EsConfig;
+import org.onap.ccsdk.features.sdnr.wt.dataprovider.database.elasticsearch.data.acessor.DataObjectAcessorInventory;
 import org.onap.ccsdk.features.sdnr.wt.dataprovider.database.elasticsearch.data.acessor.DataObjectAcessorPm;
 import org.onap.ccsdk.features.sdnr.wt.dataprovider.database.elasticsearch.data.acessor.DataObjectAcessorPm.Intervall;
 import org.onap.ccsdk.features.sdnr.wt.dataprovider.database.elasticsearch.data.acessor.DataObjectAcessorStatus;
@@ -38,10 +38,13 @@ import org.onap.ccsdk.features.sdnr.wt.dataprovider.database.elasticsearch.data.
 import org.onap.ccsdk.features.sdnr.wt.dataprovider.database.elasticsearch.data.entity.HtDatabaseEventsService;
 import org.onap.ccsdk.features.sdnr.wt.dataprovider.database.elasticsearch.data.entity.HtDatabaseMaintenanceService;
 import org.onap.ccsdk.features.sdnr.wt.dataprovider.database.elasticsearch.data.rpctypehelper.QueryResult;
+import org.onap.ccsdk.features.sdnr.wt.dataprovider.impl.DataTreeProviderImpl;
 import org.onap.ccsdk.features.sdnr.wt.dataprovider.model.DataProvider;
+import org.onap.ccsdk.features.sdnr.wt.dataprovider.model.DatabaseDataProvider;
 import org.onap.ccsdk.features.sdnr.wt.dataprovider.model.HtDatabaseMaintenance;
 import org.onap.ccsdk.features.sdnr.wt.dataprovider.model.HtDatabaseMediatorserver;
 import org.onap.ccsdk.features.sdnr.wt.dataprovider.model.HtUserdataManager;
+import org.onap.ccsdk.features.sdnr.wt.dataprovider.model.InventoryTreeProvider;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.CreateMaintenanceInput;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.CreateMaintenanceOutputBuilder;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.CreateMediatorServerInput;
@@ -65,6 +68,7 @@ import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.pro
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.ReadFaultcurrentListOutputBuilder;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.ReadFaultlogListOutputBuilder;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.ReadGuiCutThroughEntryOutputBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.ReadInventoryDeviceListOutputBuilder;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.ReadInventoryListOutputBuilder;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.ReadMaintenanceListOutputBuilder;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.ReadMediatorServerListOutputBuilder;
@@ -82,6 +86,7 @@ import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.pro
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.UpdateMediatorServerOutputBuilder;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.UpdateNetworkElementConnectionInput;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.UpdateNetworkElementConnectionOutputBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.read.inventory.list.output.Data;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -100,7 +105,7 @@ public class ElasticSearchDataProvider implements DatabaseDataProvider {
     private final DataObjectAcessorWithId<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.read.mediator.server.list.output.Data> mediatorserverRW;
     private final DataObjectAcessorWithId<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.read.maintenance.list.output.Data> maintenanceRW;
     private final DataObjectAcessorWithId<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.read.gui.cut.through.entry.output.Data> guicutthroughRW;
-    private final DataObjectAcessorWithId<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.read.inventory.list.output.Data> equipmentRW;
+    private final DataObjectAcessorInventory<Data> equipmentRW;
     private final DataObjectAcessorWithId<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.read.connectionlog.list.output.Data> connnectionlogRW;
     private final DataObjectAcessorWithId<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.read.eventlog.list.output.Data> eventlogRW;
     private final DataObjectAcessorWithId<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.read.network.element.connection.list.output.Data> networkelementConnectionRW;
@@ -111,6 +116,7 @@ public class ElasticSearchDataProvider implements DatabaseDataProvider {
     private final HtDatabaseEventsService databaseService;
     private final HtDatabaseMaintenanceService databaseMaintenanceService;
     private final HtUserdataManager usermanager;
+    private final InventoryTreeProvider inventoryTreeProvider;
 
     private final HtDatabaseMediatorserver dbMediatorServerService = new HtDatabaseMediatorserver() {
 
@@ -158,7 +164,7 @@ public class ElasticSearchDataProvider implements DatabaseDataProvider {
                 doFullsizeRequests);
         this.guicutthroughRW.setWriteInterface(Guicutthrough.class);
 
-        this.equipmentRW = new DataObjectAcessorWithId<>(dbClient, Entity.Inventoryequipment,
+        this.equipmentRW = new DataObjectAcessorInventory<>(dbClient, Entity.Inventoryequipment,
                 org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.read.inventory.list.output.Data.class,
                 doFullsizeRequests);
 
@@ -197,9 +203,10 @@ public class ElasticSearchDataProvider implements DatabaseDataProvider {
 
         this.readStatus = new DataObjectAcessorStatus(dbClient, Entity.Faultcurrent, doFullsizeRequests);
 
-        this.databaseService = new HtDatabaseEventsService(dbClient, this);
+        this.databaseService = new HtDatabaseEventsService(dbClient);
         this.databaseMaintenanceService = new HtDatabaseMaintenanceService(dbClient);
         this.usermanager = new HtUserdataManagerImpl(this.dbClient);
+        this.inventoryTreeProvider = new DataTreeProviderImpl(this.dbClient);
     }
 
     /*-------------------------
@@ -297,6 +304,17 @@ public class ElasticSearchDataProvider implements DatabaseDataProvider {
     }
 
     @Override
+    public ReadInventoryDeviceListOutputBuilder readInventoryDeviceList(EntityInput input) {
+        ReadInventoryDeviceListOutputBuilder outputBuilder = new ReadInventoryDeviceListOutputBuilder();
+        QueryResult<String> result = equipmentRW.getDataDeviceList(input);
+        outputBuilder.setPagination(
+                new org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.read.inventory.device.list.output.PaginationBuilder(
+                        result.getPagination()).build());
+        outputBuilder.setData(result.getResult().getHitSets());
+        return outputBuilder;
+    }
+
+    @Override
     public ReadConnectionlogListOutputBuilder readConnectionlogList(EntityInput input) {
         ReadConnectionlogListOutputBuilder outputBuilder = new ReadConnectionlogListOutputBuilder();
         QueryResult<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.read.connectionlog.list.output.Data> result =
@@ -547,5 +565,9 @@ public class ElasticSearchDataProvider implements DatabaseDataProvider {
         return this.usermanager;
     }
 
+    @Override
+    public InventoryTreeProvider getInventoryTreeProvider() {
+        return this.inventoryTreeProvider;
+    }
 
 }
diff --git a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/nodb/NoDbDatabaseDataProvider.java b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/nodb/NoDbDatabaseDataProvider.java
index 54cf32ce0..02b58bf72 100644
--- a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/nodb/NoDbDatabaseDataProvider.java
+++ b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/nodb/NoDbDatabaseDataProvider.java
@@ -24,11 +24,12 @@ package org.onap.ccsdk.features.sdnr.wt.dataprovider.database.nodb;
 import java.io.IOException;
 import java.util.concurrent.TimeUnit;
 import org.onap.ccsdk.features.sdnr.wt.common.database.HtDatabaseClient;
-import org.onap.ccsdk.features.sdnr.wt.dataprovider.database.DatabaseDataProvider;
 import org.onap.ccsdk.features.sdnr.wt.dataprovider.model.DataProvider;
+import org.onap.ccsdk.features.sdnr.wt.dataprovider.model.DatabaseDataProvider;
 import org.onap.ccsdk.features.sdnr.wt.dataprovider.model.HtDatabaseMaintenance;
 import org.onap.ccsdk.features.sdnr.wt.dataprovider.model.HtDatabaseMediatorserver;
 import org.onap.ccsdk.features.sdnr.wt.dataprovider.model.HtUserdataManager;
+import org.onap.ccsdk.features.sdnr.wt.dataprovider.model.InventoryTreeProvider;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.CreateMaintenanceInput;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.CreateMaintenanceOutputBuilder;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.CreateMediatorServerInput;
@@ -48,6 +49,7 @@ import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.pro
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.ReadFaultcurrentListOutputBuilder;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.ReadFaultlogListOutputBuilder;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.ReadGuiCutThroughEntryOutputBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.ReadInventoryDeviceListOutputBuilder;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.ReadInventoryListOutputBuilder;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.ReadMaintenanceListOutputBuilder;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.ReadMediatorServerListOutputBuilder;
@@ -72,12 +74,14 @@ public class NoDbDatabaseDataProvider implements DatabaseDataProvider {
     private final HtDatabaseMediatorserver mediatorserver;
     private final HtDatabaseMaintenance maintenance;
     private final DataProvider dataprovider;
+    private final InventoryTreeProvider inventoryTreeProvider;
 
     public NoDbDatabaseDataProvider() {
         this.usermanger = new NoDbHtUserdataManager();
         this.mediatorserver = new NoDbHtDatabaseMediatorserver();
         this.maintenance = new NoDbHtDatabaseMaintenance();
         this.dataprovider = new NoDbDataProvider();
+        this.inventoryTreeProvider = new NoDbInventoryTreeProvider();
     }
     @Override
     public HtDatabaseClient getRawClient() {
@@ -241,4 +245,14 @@ public class NoDbDatabaseDataProvider implements DatabaseDataProvider {
     public HtUserdataManager getUserManager() {
         return this.usermanger;
     }
+
+    @Override
+    public InventoryTreeProvider getInventoryTreeProvider() {
+        return this.inventoryTreeProvider;
+    }
+
+    @Override
+    public ReadInventoryDeviceListOutputBuilder readInventoryDeviceList(EntityInput input) {
+        return new ReadInventoryDeviceListOutputBuilder();
+    }
 }
diff --git a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/nodb/NoDbInventoryTreeProvider.java b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/nodb/NoDbInventoryTreeProvider.java
new file mode 100644
index 000000000..ad2960f64
--- /dev/null
+++ b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/database/nodb/NoDbInventoryTreeProvider.java
@@ -0,0 +1,35 @@
+/*
+ * ============LICENSE_START=======================================================
+ * ONAP : ccsdk features
+ * ================================================================================
+ * Copyright (C) 2023 highstreet technologies GmbH 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=========================================================
+ *
+ */
+package org.onap.ccsdk.features.sdnr.wt.dataprovider.database.nodb;
+
+import org.onap.ccsdk.features.sdnr.wt.dataprovider.model.InventoryTreeProvider;
+import org.onap.ccsdk.features.sdnr.wt.dataprovider.model.types.DataTreeObject;
+
+import java.io.IOException;
+import java.util.List;
+
+public class NoDbInventoryTreeProvider implements InventoryTreeProvider {
+    @Override
+    public DataTreeObject readInventoryTree(List<String> tree, String filter) throws IOException {
+        return new DataTreeObject("","");
+    }
+}
diff --git a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/http/DataTreeChildObject.java b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/http/DataTreeChildObject.java
deleted file mode 100644
index 05e6d2f13..000000000
--- a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/http/DataTreeChildObject.java
+++ /dev/null
@@ -1,187 +0,0 @@
-/*
- * ============LICENSE_START=======================================================
- * ONAP : ccsdk features
- * ================================================================================
- * Copyright (C) 2020 highstreet technologies GmbH 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=========================================================
- *
- */
-package org.onap.ccsdk.features.sdnr.wt.dataprovider.http;
-
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.Map.Entry;
-import org.json.JSONObject;
-
-public class DataTreeChildObject {
-
-    private final String label;
-//    private final String ownSeverity;
-//    private final String childrenSeveritySummary;
-    private final boolean isMatch;
-    private final Map<String, DataTreeChildObject> children;
-    private final Map<String, Object> properties;
-
-    public boolean isMatch() {
-        return this.isMatch;
-    }
-
-    public DataTreeChildObject(String label, boolean isMatch, Map<String, DataTreeChildObject> children,
-            String ownSeverity, String childrenSeveritySummary) {
-        this.label = label;
-        this.isMatch = isMatch;
-        this.children = children;
-//        this.ownSeverity = ownSeverity;
-//        this.childrenSeveritySummary = childrenSeveritySummary;
-        this.properties = new HashMap<>();
-    }
-
-    public DataTreeChildObject setProperty(String key, Object value) {
-        this.properties.put(key, value);
-        return this;
-    }
-
-    public Object getProperty(String key, Object defaultValue) {
-        return this.properties.getOrDefault(key, defaultValue);
-    }
-
-    /**
-     * @param string
-     * @param b
-     */
-    public DataTreeChildObject(String label, boolean isMatch) {
-        this(label, isMatch, new HashMap<>(), null, null);
-    }
-
-    /**
-     * @param treeLevel
-     * @param id
-     * @param data
-     * @param childKey
-     * @param parentKey
-     * @return
-     */
-    public boolean putChild(long treeLevel, String id, DataTreeChildObject data, String parentKey, String childKey) {
-        Object itemValue;
-        Object itemValueToMatch = data.getProperty(parentKey, null);
-        if (itemValueToMatch == null) {
-            return false;
-        }
-        if (treeLevel > 0) {
-            if (this.children != null) {
-                for (DataTreeChildObject child : this.children.values()) {
-                    if (child.putChild(treeLevel - 1, id, data, parentKey, childKey)) {
-                        return true;
-                    }
-                }
-            }
-        } else {
-            itemValue = this.getProperty(childKey, null);
-            if (itemValue != null && itemValue.equals(itemValueToMatch)) {
-                this.children.put(id, data);
-                return true;
-            }
-        }
-        return false;
-    }
-
-    /**
-     * @param treeLevel
-     * @param id
-     * @param data
-     * @param parentKey
-     * @param childKey
-     * @return
-     */
-    public boolean putChildIfNotExists(long treeLevel, String id, DataTreeChildObject data, String parentKey,
-            String childKey) {
-        Object itemValue;
-        Object itemValueToMatch = data.getProperty(parentKey, null);
-        if (itemValueToMatch == null) {
-            return false;
-        }
-        if (treeLevel > 0) {
-            if (this.children != null) {
-                for (DataTreeChildObject child : this.children.values()) {
-                    if (child.putChildIfNotExists(treeLevel - 1, id, data, parentKey, childKey)) {
-                        return true;
-                    }
-                }
-            }
-        } else {
-            itemValue = this.getProperty(childKey, null);
-            if (itemValue != null && itemValue.equals(itemValueToMatch)) {
-                if (!this.children.containsKey(id)) {
-                    this.children.put(id, data);
-                }
-            }
-        }
-        return false;
-    }
-
-    /**
-     * @return
-     */
-    public JSONObject toJSONObject() {
-        JSONObject o = new JSONObject();
-        o.put("label", this.label);
-        o.put("isMatch", this.isMatch);
-        JSONObject c = new JSONObject();
-        if (this.children != null) {
-            for (Entry<String, DataTreeChildObject> entry : this.children.entrySet()) {
-                c.put(entry.getKey(), entry.getValue().toJSONObject());
-            }
-        }
-        o.put("children", c);
-        //o.put("ownSeverity", null);
-        //o.put("childrenSeveritySummary", null);
-        return o;
-    }
-
-    public boolean hasChildMatching() {
-        boolean match = false;
-        for (DataTreeChildObject child : this.children.values()) {
-            match = match || child.hasChildMatching() || this.isMatch;
-            if (match) {
-                break;
-            }
-        }
-        return match;
-    }
-
-    /**
-     *
-     */
-    public void removeUnmatchedPaths() {
-        List<String> toRemove = new ArrayList<>();
-        for (Entry<String, DataTreeChildObject> entry : this.children.entrySet()) {
-            if (!(entry.getValue().hasChildMatching() || entry.getValue().isMatch)) {
-                toRemove.add(entry.getKey());
-            } else {
-                entry.getValue().removeUnmatchedPaths();
-            }
-        }
-        for (String key : toRemove) {
-            this.children.remove(key);
-        }
-    }
-
-    public boolean hasChildren() {
-        return this.children!=null && !this.children.isEmpty();
-    }
-}
diff --git a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/http/DataTreeHttpServlet.java b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/http/DataTreeHttpServlet.java
index 3c4a7621b..2f7b9e3fc 100644
--- a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/http/DataTreeHttpServlet.java
+++ b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/http/DataTreeHttpServlet.java
@@ -32,14 +32,18 @@ import java.util.List;
 import java.util.Optional;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
+import javax.servlet.Servlet;
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import org.json.JSONObject;
-import org.onap.ccsdk.features.sdnr.wt.common.database.HtDatabaseClient;
-import org.onap.ccsdk.features.sdnr.wt.dataprovider.impl.DataTreeProviderImpl;
+import org.onap.ccsdk.features.sdnr.wt.dataprovider.model.InventoryTreeProvider;
+import org.onap.ccsdk.features.sdnr.wt.dataprovider.model.types.DataTreeObject;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.Entity;
+import org.osgi.service.component.annotations.Component;
+import org.osgi.service.http.whiteboard.propertytypes.HttpWhiteboardServletName;
+import org.osgi.service.http.whiteboard.propertytypes.HttpWhiteboardServletPattern;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -47,22 +51,22 @@ import org.slf4j.LoggerFactory;
  * @author Michael Dürre
  *
  */
+
+@HttpWhiteboardServletPattern("/tree/*")
+@HttpWhiteboardServletName("DataTreeHttpServlet")
+@Component(service = Servlet.class)
 public class DataTreeHttpServlet extends HttpServlet {
 
     private static final long serialVersionUID = 1L;
-    private final DataTreeProviderImpl dataTreeProvider;
+    private InventoryTreeProvider dataTreeProvider;
     private static final Logger LOG = LoggerFactory.getLogger(DataTreeHttpServlet.class);
 
     public DataTreeHttpServlet() {
         super();
-        this.dataTreeProvider = new DataTreeProviderImpl();
     }
 
-    /**
-     * @param client
-     */
-    public void setDatabaseClient(HtDatabaseClient client) {
-        this.dataTreeProvider.setDatabaseClient(client);
+    public void setInventoryTreeProvider(InventoryTreeProvider provider) {
+        this.dataTreeProvider = provider;
 
     }
 
@@ -109,7 +113,7 @@ public class DataTreeHttpServlet extends HttpServlet {
         LOG.debug("GET request for {}", uri);
         final EntityWithTree e = getEntity(uri);
         if (e != null) {
-            LOG.info("GET request for {} to e={} with tree={}", uri, e.entity, e.tree);
+            LOG.debug("GET request for {} to e={} with tree={}", uri, e.entity, e.tree);
             switch (e.entity) {
                 case Inventoryequipment:
                     DataTreeObject o = this.dataTreeProvider.readInventoryTree(e.tree, null);
@@ -170,7 +174,7 @@ public class DataTreeHttpServlet extends HttpServlet {
         final Matcher matcher = pattern.matcher(uri);
         if (matcher.find() && matcher.groupCount() > 0) {
             try {
-                Optional<Entity> oe = Entity.forName(matcher.group(1));
+                Optional<Entity> oe = Optional.ofNullable(Entity.forName(matcher.group(1)));
                 if (oe.isPresent()) {
                     return new EntityWithTree(oe.get(), matcher.groupCount() > 1 ? matcher.group(2) : null);
                 } else {
diff --git a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/http/DataTreeObject.java b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/http/DataTreeObject.java
deleted file mode 100644
index f12ff3deb..000000000
--- a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/http/DataTreeObject.java
+++ /dev/null
@@ -1,148 +0,0 @@
-/*
- * ============LICENSE_START=======================================================
- * ONAP : ccsdk features
- * ================================================================================
- * Copyright (C) 2020 highstreet technologies GmbH 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=========================================================
- *
- */
-package org.onap.ccsdk.features.sdnr.wt.dataprovider.http;
-
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import org.json.JSONObject;
-
-public class DataTreeObject extends HashMap<String, DataTreeChildObject> {
-
-    private static final long serialVersionUID = 1L;
-    private final String parentKey;
-    private final String childKey;
-
-    public DataTreeObject createTreeByPath(String[] pathFilter) {
-
-        if (pathFilter != null && pathFilter.length > 0) {
-            for (String key : this.keySet()) {
-                if (key.equals(pathFilter[0])) {
-                    DataTreeChildObject o = this.getChildElemByPath(this.get(key), slice(pathFilter, 1));
-                    DataTreeObject r = new DataTreeObject(this.parentKey, this.childKey);
-                    r.put(key, o);
-                    return r;
-                }
-            }
-        }
-
-        return null;
-
-    }
-
-    private DataTreeChildObject getChildElemByPath(DataTreeChildObject source, String[] pathFilter) {
-
-        if (pathFilter != null && pathFilter.length > 0) {
-            //			for(String key:source..keySet()) {
-            //				if(key.equals(pathFilter[0])){
-            //					DataTreeChildObject o= this.getChildElemByPath(this.get(key),slice(pathFilter,1));
-            //				}
-            //			}
-        }
-
-        return null;
-    }
-
-    public DataTreeObject(String parentKey, String childKey) {
-        this.parentKey = parentKey;
-        this.childKey = childKey;
-    }
-
-    /**
-     * @param treeLevel
-     * @param id
-     * @param data
-     */
-    public void put(long treeLevel, String id, DataTreeChildObject data) {
-        for (DataTreeChildObject entry : this.values()) {
-            if (entry.putChild(treeLevel, id, data, this.parentKey, this.childKey)) {
-                break;
-            }
-        }
-
-    }
-
-    /**
-     *
-     */
-    public String toJSON() {
-        JSONObject o = new JSONObject();
-        for (Entry<String, DataTreeChildObject> entry : this.entrySet()) {
-            o.put(entry.getKey(), entry.getValue().toJSONObject());
-        }
-        return o.toString();
-    }
-
-    /**
-     *
-     */
-    public void removeUnmatchedPaths() {
-        List<String> toRemove = new ArrayList<>();
-         for (Entry<String,DataTreeChildObject> entry : this.entrySet()) {
-            entry.getValue().removeUnmatchedPaths();
-            if(!entry.getValue().isMatch() && !entry.getValue().hasChildren()) {
-                toRemove.add(entry.getKey());
-            }
-        }
-        for(String toRemoveKey:toRemove) {
-            this.remove(toRemoveKey);
-        }
-
-    }
-
-    /**
-     * @param treeLevel
-     * @param id
-     * @param setProperty
-     */
-    public void putIfNotExists(long treeLevel, String id, DataTreeChildObject data) {
-        for (DataTreeChildObject entry : this.values()) {
-            if (entry.putChildIfNotExists(treeLevel, id, data, this.parentKey, this.childKey)) {
-                break;
-            }
-        }
-    }
-
-    /**
-     * @param id
-     * @param data
-     */
-    public void putIfNotExists(String id, DataTreeChildObject data) {
-        if (!this.containsKey(id)) {
-            this.put(id, data);
-        }
-    }
-
-    /**
-     * @param source
-     * @param i
-     * @return
-     */
-    public static String[] slice(String[] source, int start) {
-        String[] r = new String[source.length - start];
-        for (int i = 0; i < r.length; i++) {
-            r[i] = source[i + start];
-        }
-        return r;
-
-    }
-}
diff --git a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/http/MsServlet.java b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/http/MsServlet.java
index 103dec70d..85658d439 100644
--- a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/http/MsServlet.java
+++ b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/http/MsServlet.java
@@ -22,15 +22,22 @@
 package org.onap.ccsdk.features.sdnr.wt.dataprovider.http;
 
 import java.io.IOException;
+import javax.servlet.Servlet;
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import org.onap.ccsdk.features.sdnr.wt.common.http.BaseServlet;
 import org.onap.ccsdk.features.sdnr.wt.dataprovider.impl.MediatorServerDataProvider;
 import org.onap.ccsdk.features.sdnr.wt.dataprovider.model.HtDatabaseMediatorserver;
+import org.osgi.service.component.annotations.Component;
+import org.osgi.service.http.whiteboard.propertytypes.HttpWhiteboardServletName;
+import org.osgi.service.http.whiteboard.propertytypes.HttpWhiteboardServletPattern;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+@HttpWhiteboardServletPattern("/ms/*")
+@HttpWhiteboardServletName("MsServlet")
+@Component(service = Servlet.class)
 public class MsServlet extends BaseServlet {
 
     /**
diff --git a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/http/UserdataHttpServlet.java b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/http/UserdataHttpServlet.java
index b51d2a6df..92bccce6f 100644
--- a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/http/UserdataHttpServlet.java
+++ b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/http/UserdataHttpServlet.java
@@ -26,6 +26,7 @@ import java.nio.charset.StandardCharsets;
 import java.util.Base64;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
+import javax.servlet.Servlet;
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
@@ -33,9 +34,15 @@ import javax.servlet.http.HttpServletResponse;
 import org.json.JSONObject;
 import org.onap.ccsdk.features.sdnr.wt.common.http.BaseHTTPClient;
 import org.onap.ccsdk.features.sdnr.wt.dataprovider.model.HtUserdataManager;
+import org.osgi.service.component.annotations.Component;
+import org.osgi.service.http.whiteboard.propertytypes.HttpWhiteboardServletName;
+import org.osgi.service.http.whiteboard.propertytypes.HttpWhiteboardServletPattern;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+@HttpWhiteboardServletPattern({"/userdata","/userdata/*"})
+@HttpWhiteboardServletName("UserdataHttpServlet")
+@Component(service = Servlet.class)
 public class UserdataHttpServlet extends HttpServlet {
 
     private static final long serialVersionUID = 1L;
@@ -50,10 +57,10 @@ public class UserdataHttpServlet extends HttpServlet {
         final String uri = req.getRequestURI();
         final Matcher matcher = PATTERN.matcher(uri);
         if (matcher.find()) {
-            LOG.info("GET found match");
+            LOG.debug("GET found match");
             this.handleGetRequest(req, resp, matcher.groupCount() > 0 ? matcher.group(1) : null);
         } else {
-            LOG.info("no valid request");
+            LOG.debug("no valid request");
             super.doGet(req, resp);
         }
     }
@@ -63,11 +70,11 @@ public class UserdataHttpServlet extends HttpServlet {
         final String uri = req.getRequestURI();
         final Matcher matcher = PATTERN.matcher(uri);
         if (matcher.find()) {
-            LOG.info("PUT found match");
+            LOG.debug("PUT found match");
             final String payload = getPayload(req);
             this.handlePutRequest(req, resp, payload, matcher.groupCount() > 0 ? matcher.group(1) : null);
         } else {
-            LOG.info("no valid request");
+            LOG.debug("no valid request");
             super.doPut(req, resp);
         }
     }
@@ -81,10 +88,10 @@ public class UserdataHttpServlet extends HttpServlet {
         final String uri = req.getRequestURI();
         final Matcher matcher = PATTERN.matcher(uri);
         if (matcher.find()) {
-            LOG.info("DELETE found match");
+            LOG.debug("DELETE found match");
             this.handleDeleteRequest(req, resp, matcher.groupCount() > 0 ? matcher.group(1) : null);
         } else {
-            LOG.info("no valid request");
+            LOG.debug("no valid request");
             super.doPut(req, resp);
         }
     }
diff --git a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/http/about/AboutHttpServlet.java b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/http/about/AboutHttpServlet.java
index 40a46e6fb..45bd80cd6 100644
--- a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/http/about/AboutHttpServlet.java
+++ b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/http/about/AboutHttpServlet.java
@@ -29,6 +29,7 @@ import java.util.Map;
 import java.util.Map.Entry;
 import java.util.jar.Attributes;
 import java.util.jar.Manifest;
+import javax.servlet.Servlet;
 import javax.servlet.ServletException;
 import javax.servlet.ServletOutputStream;
 import javax.servlet.http.HttpServlet;
@@ -41,9 +42,16 @@ import org.onap.ccsdk.features.sdnr.wt.dataprovider.model.types.NetconfTimeStamp
 import org.osgi.framework.Bundle;
 import org.osgi.framework.BundleContext;
 import org.osgi.framework.FrameworkUtil;
+import org.osgi.service.component.annotations.Component;
+import org.osgi.service.component.annotations.ServiceScope;
+import org.osgi.service.http.whiteboard.propertytypes.HttpWhiteboardServletName;
+import org.osgi.service.http.whiteboard.propertytypes.HttpWhiteboardServletPattern;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+@HttpWhiteboardServletPattern("/about")
+@HttpWhiteboardServletName("AboutHttpServlet")
+@Component(service = Servlet.class)
 public class AboutHttpServlet extends HttpServlet {
 
     /**
@@ -98,7 +106,6 @@ public class AboutHttpServlet extends HttpServlet {
         this.BUNDLESTATE_LUT.put(Bundle.STARTING, "starting");
         this.BUNDLESTATE_LUT.put(Bundle.STOPPING, "stopping");
         this.BUNDLESTATE_LUT.put(Bundle.ACTIVE, "active");
-
     }
 
     protected String getGroupIdOrDefault(String def) {
diff --git a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/http/about/ODLVersionLUT.java b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/http/about/ODLVersionLUT.java
index 868bf7ec6..c623d9955 100644
--- a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/http/about/ODLVersionLUT.java
+++ b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/http/about/ODLVersionLUT.java
@@ -72,6 +72,8 @@ public class ODLVersionLUT {
         }
         if(odlMdsalVersionLUT==null) {
             odlMdsalVersionLUT = new HashMap<>();
+            odlMdsalVersionLUT.put("10.0.2","chlorine-SR0 (0.17.0)");
+            odlMdsalVersionLUT.put("9.0.5","sulfur-SR2 (0.16.2)");
             odlMdsalVersionLUT.put("9.0.4","sulfur-SR1 (0.16.1)");
             odlMdsalVersionLUT.put("9.0.2","sulfur-SR0 (0.16.0)");
             odlMdsalVersionLUT.put("8.0.11","phosphorus-SR2 (0.15.2)");
diff --git a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/http/yangschema/YangSchemaHttpServlet.java b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/http/yangschema/YangSchemaHttpServlet.java
index 86f67b1de..f9fa2e931 100644
--- a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/http/yangschema/YangSchemaHttpServlet.java
+++ b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/http/yangschema/YangSchemaHttpServlet.java
@@ -23,13 +23,21 @@ package org.onap.ccsdk.features.sdnr.wt.dataprovider.http.yangschema;
 
 import java.io.IOException;
 import java.text.ParseException;
+import javax.servlet.Servlet;
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
+
+import org.osgi.service.component.annotations.Component;
+import org.osgi.service.http.whiteboard.propertytypes.HttpWhiteboardServletName;
+import org.osgi.service.http.whiteboard.propertytypes.HttpWhiteboardServletPattern;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+@HttpWhiteboardServletPattern("/yang-schema/*")
+@HttpWhiteboardServletName("YangSchemaHttpServlet")
+@Component(service = Servlet.class)
 public class YangSchemaHttpServlet extends HttpServlet {
     /**
      *
diff --git a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/impl/DataProviderImpl.java b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/impl/DataProviderImpl.java
index e06a1a9a2..66ffdf8b3 100644
--- a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/impl/DataProviderImpl.java
+++ b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/impl/DataProviderImpl.java
@@ -87,7 +87,7 @@ public class DataProviderImpl implements IEntityDataProvider, AutoCloseable {
         try {
             // Start RPC Service
             this.rpcApiService = new DataProviderServiceImpl(rpcProviderService, this.mediatorServerServlet, this.dataBroker);
-            this.treeServlet.setDatabaseClient(this.rpcApiService.getRawClient());
+            this.treeServlet.setInventoryTreeProvider(this.rpcApiService.getInventoryTreeProvider());
             this.userdataServlet.setDatabaseClient(this.rpcApiService.getHtDatabaseUserManager());
             LOG.info("Session Initiated end. Initialization done");
         } catch (Exception e) {
@@ -109,7 +109,7 @@ public class DataProviderImpl implements IEntityDataProvider, AutoCloseable {
     /**
      * Used to close all Services, that should support AutoCloseable Pattern
      *
-     * @param toClose
+     * @param toCloseList
      * @throws Exception
      */
     private void close(AutoCloseable... toCloseList) throws Exception {
diff --git a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/impl/DataProviderServiceImpl.java b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/impl/DataProviderServiceImpl.java
index b75108ab2..d21d50f83 100644
--- a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/impl/DataProviderServiceImpl.java
+++ b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/impl/DataProviderServiceImpl.java
@@ -27,9 +27,6 @@ import com.google.common.util.concurrent.ListenableFuture;
 import java.io.IOException;
 import java.io.PrintWriter;
 import java.io.StringWriter;
-import java.lang.reflect.InvocationTargetException;
-import java.lang.reflect.Method;
-import java.util.Arrays;
 import java.util.Map;
 import java.util.Optional;
 import java.util.Set;
@@ -39,15 +36,16 @@ import java.util.stream.Collectors;
 import org.eclipse.jdt.annotation.NonNull;
 import org.onap.ccsdk.features.sdnr.wt.common.configuration.ConfigurationFileRepresentation;
 import org.onap.ccsdk.features.sdnr.wt.common.database.HtDatabaseClient;
-import org.onap.ccsdk.features.sdnr.wt.dataprovider.database.DatabaseDataProvider;
 import org.onap.ccsdk.features.sdnr.wt.dataprovider.database.elasticsearch.impl.ElasticSearchDataProvider;
 import org.onap.ccsdk.features.sdnr.wt.dataprovider.database.nodb.NoDbDatabaseDataProvider;
 import org.onap.ccsdk.features.sdnr.wt.dataprovider.database.sqldb.data.SqlDBDataProvider;
 import org.onap.ccsdk.features.sdnr.wt.dataprovider.http.MsServlet;
 import org.onap.ccsdk.features.sdnr.wt.dataprovider.model.DataProvider;
+import org.onap.ccsdk.features.sdnr.wt.dataprovider.model.DatabaseDataProvider;
 import org.onap.ccsdk.features.sdnr.wt.dataprovider.model.HtDatabaseMaintenance;
 import org.onap.ccsdk.features.sdnr.wt.dataprovider.model.HtUserdataManager;
 import org.onap.ccsdk.features.sdnr.wt.dataprovider.model.IEsConfig;
+import org.onap.ccsdk.features.sdnr.wt.dataprovider.model.InventoryTreeProvider;
 import org.onap.ccsdk.features.sdnr.wt.dataprovider.model.SdnrDbType;
 import org.onap.ccsdk.features.sdnr.wt.yang.mapper.YangToolsMapperHelper;
 import org.opendaylight.mdsal.binding.api.DataBroker;
@@ -82,6 +80,8 @@ import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.pro
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.ReadFaultlogListOutput;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.ReadGuiCutThroughEntryInput;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.ReadGuiCutThroughEntryOutput;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.ReadInventoryDeviceListInput;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.ReadInventoryDeviceListOutput;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.ReadInventoryListInput;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.ReadInventoryListOutput;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.ReadMaintenanceListInput;
@@ -141,7 +141,6 @@ public class DataProviderServiceImpl implements DataProviderService, AutoCloseab
     private final DatabaseDataProvider dataProvider;
     private final ConfigurationFileRepresentation configuration;
     private final DataProviderConfig dbConfig;
-    private final HtUserdataManager dbUserManager;
     private final DataBroker dataBroker;
     private final MsServlet mediatorServerServlet;
 
@@ -161,7 +160,6 @@ public class DataProviderServiceImpl implements DataProviderService, AutoCloseab
         else {
             this.dataProvider = new NoDbDatabaseDataProvider();
         }
-        this.dbUserManager = this.dataProvider.getUserManager();
         this.dataProvider.waitForYellowDatabaseStatus(DATABASE_TIMEOUT_MS, TimeUnit.MILLISECONDS);
         mediatorServerServlet.setDataProvider(this.dataProvider.getHtDatabaseMediatorServer());
         // Register ourselves as the REST API RPC implementation
@@ -296,6 +294,15 @@ public class DataProviderServiceImpl implements DataProviderService, AutoCloseab
     }
 
     @Override
+    public ListenableFuture<RpcResult<ReadInventoryDeviceListOutput>> readInventoryDeviceList(
+            ReadInventoryDeviceListInput input) {
+        LOG.debug("RPC Request: readInventoryDeviceList with input {}", input);
+        RpcResultBuilder<ReadInventoryDeviceListOutput> result =
+                read(() -> DataProviderServiceImpl.this.dataProvider.readInventoryDeviceList(input));
+        return result.buildFuture();
+    }
+
+    @Override
     public ListenableFuture<RpcResult<ReadPmdata15mLtpListOutput>> readPmdata15mLtpList(
             ReadPmdata15mLtpListInput input) {
         LOG.debug("RPC Request: readPmdata15mLtpList with input {}", input);
@@ -495,6 +502,10 @@ public class DataProviderServiceImpl implements DataProviderService, AutoCloseab
         return buf.toString();
     }
 
+    public InventoryTreeProvider getInventoryTreeProvider() {
+        return this.dataProvider.getInventoryTreeProvider();
+    }
+
     private interface GetEntityInput<O extends DataObject,B> {
         B get() throws IOException;
     }
@@ -515,7 +526,7 @@ public class DataProviderServiceImpl implements DataProviderService, AutoCloseab
 
     
     public HtUserdataManager getHtDatabaseUserManager() {
-        return this.dbUserManager;
+        return this.dataProvider.getUserManager();
     }
 
 
diff --git a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/impl/DataTreeProviderImpl.java b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/impl/DataTreeProviderImpl.java
index cb62e3326..f5f1e4583 100644
--- a/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/impl/DataTreeProviderImpl.java
+++ b/sdnr/wt/data-provider/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/dataprovider/impl/DataTreeProviderImpl.java
@@ -21,294 +21,114 @@
  */
 package org.onap.ccsdk.features.sdnr.wt.dataprovider.impl;
 
-import java.io.IOException;
-import java.util.ArrayList;
-import java.util.List;
-import org.json.JSONObject;
 import org.onap.ccsdk.features.sdnr.wt.common.database.HtDatabaseClient;
-import org.onap.ccsdk.features.sdnr.wt.common.database.SearchHit;
+import org.onap.ccsdk.features.sdnr.wt.common.database.SearchResult;
 import org.onap.ccsdk.features.sdnr.wt.common.database.queries.BoolQueryBuilder;
 import org.onap.ccsdk.features.sdnr.wt.common.database.queries.QueryBuilder;
 import org.onap.ccsdk.features.sdnr.wt.common.database.queries.QueryBuilders;
 import org.onap.ccsdk.features.sdnr.wt.common.database.queries.SortOrder;
-import org.onap.ccsdk.features.sdnr.wt.common.database.requests.Search7Request;
 import org.onap.ccsdk.features.sdnr.wt.common.database.requests.SearchRequest;
 import org.onap.ccsdk.features.sdnr.wt.common.database.responses.AggregationEntries;
 import org.onap.ccsdk.features.sdnr.wt.common.database.responses.SearchResponse;
-import org.onap.ccsdk.features.sdnr.wt.dataprovider.http.DataTreeChildObject;
-import org.onap.ccsdk.features.sdnr.wt.dataprovider.http.DataTreeObject;
+import org.onap.ccsdk.features.sdnr.wt.dataprovider.database.elasticsearch.data.acessor.DataObjectAcessorWithId;
+import org.onap.ccsdk.features.sdnr.wt.dataprovider.model.BaseInventoryTreeProvider;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.Entity;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.Inventory;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.InventoryEntity;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
 
 /**
  * @author Michael Dürre
- *
  */
-public class DataTreeProviderImpl {
+public class DataTreeProviderImpl extends BaseInventoryTreeProvider {
 
+    private static final Logger LOG = LoggerFactory.getLogger(DataTreeProviderImpl.class);
     private static final long MAXSIZE_PERSEARCH = 10;
-    private HtDatabaseClient dbClient;
-    private static final String INVENTORY_PROPERTY_TREELEVEL = "tree-level";
-    private static final String INVENTORY_PROPERTY_NODEID = "node-id";
-    private static final String INVENTORY_PROPERTY_UUID = "uuid";
-    private static final String INVENTORY_PROPERTY_PARENTUUID = "parent-uuid";
-    private static final String INVENTORY_PROPERTY_FOR_LABEL_CHILD = "uuid";
-    private static final String INVENTORY_PROPERTY_FOR_LABEL = "uuid";
-
-    private List<SearchHit> search(Entity e, String filter, String propTreeLevel) throws IOException {
-        return this.search(e, filter, null, null, null, null, null, null, propTreeLevel);
-    }
-
-    private List<SearchHit> search(Entity e, String filter, String nodeKey, String nodeId, String parentKey,
-            String parentValue, String childKey, String childValue, String propTreeLevel) throws IOException {
-        QueryBuilder query =
-                filter == null ? QueryBuilders.matchAllQuery() : QueryBuilders.searchAllFieldsQuery(filter);
-        if ((nodeId != null && nodeKey != null) || (parentKey != null && parentValue != null)) {
-            BoolQueryBuilder bquery = new BoolQueryBuilder();
-            if (filter != null) {
-                bquery.must(query);
-            }
-            if (nodeId != null) {
-                bquery.must(QueryBuilders.matchQuery(nodeKey, nodeId));
-            }
-            query = bquery;
-
+    private final HtDatabaseClient dbClient;
+    private final DataObjectAcessorWithId<Inventory> dbReader;
+
+    public DataTreeProviderImpl(HtDatabaseClient dbClient) {
+        this.dbClient = dbClient;
+        try {
+            this.dbReader = new DataObjectAcessorWithId<>(dbClient,Entity.Inventoryequipment,Inventory.class,true);
+        } catch (ClassNotFoundException e) {
+            throw new RuntimeException(e);
         }
-        return this.search(e, query, propTreeLevel);
     }
 
-    private List<SearchHit> search(Entity e, QueryBuilder query, String propTreeLevel) throws IOException {
-        List<SearchHit> list = new ArrayList<SearchHit>();
-        query.sort(propTreeLevel, SortOrder.ASCENDING);
-        SearchRequest request = new Search7Request(Entity.Inventoryequipment.getName());
+    private List<InventoryEntity> search(QueryBuilder query)  {
+
         query.size(MAXSIZE_PERSEARCH);
-        request.setQuery(query);
-        SearchResponse response = this.dbClient.search(request);
-        SearchHit[] matches = response.getHits();
-        for (SearchHit hit : matches) {
-            list.add(hit);
-        }
+        SearchResult<Inventory> response = null;
+        response = this.dbReader.doReadAll(query);
+        List<Inventory> matches = response.getHits();
+        List<InventoryEntity> list = new ArrayList<>();
+       list.addAll(matches);
         if (response.getTotal() > MAXSIZE_PERSEARCH) {
             long todo = response.getTotal();
             long from = MAXSIZE_PERSEARCH;
             while (todo > from) {
-                request.setQuery(query.from(from));
+                query.from(from);
                 from += MAXSIZE_PERSEARCH;
                 //merge into list
-                response = this.dbClient.search(request);
+                response = this.dbReader.doReadAll(query);
                 matches = response.getHits();
-                for (SearchHit hit : matches) {
-                    list.add(hit);
-                }
+                list.addAll(matches);
             }
         }
         return list;
     }
 
-    /**
-     * @param iNVENTORY_PROPERTY_NODEID2
-     * @return
-     * @throws IOException
-     */
-    private AggregationEntries searchAggregated(Entity e, String key) throws IOException {
-        QueryBuilder query = QueryBuilders.matchAllQuery().aggregations(key).size(MAXSIZE_PERSEARCH);
-        SearchRequest request = new Search7Request(e.getName());
-        request.setQuery(query);
-        SearchResponse response = this.dbClient.search(request);
-        return response.getAggregations(key);
-    }
-
-    /**
-     *
-     * @param tree
-     * @param filter
-     * @param
-     * @return
-     * @throws IOException
-     */
-    public DataTreeObject readInventoryTree(List<String> tree, String filter) throws IOException {
 
-        //root nodes will be node-information -> below inventory
-        if (tree == null || tree.size() <= 0) {
-            return this.readInventoryTreeWithNode(filter);
-        }
-        //root node will be inventory on tree-level if sliced treePath
-        else {
-            return this.readInventoryTreeForNode(tree.get(0), tree.subList(0, tree.size() - 1), filter);
+    @Override
+    protected List<String> getAllNodeIds() {
+        QueryBuilder query = QueryBuilders.matchAllQuery().setFullsizeRequest(true).aggregations(INVENTORY_PROPERTY_NODEID).size(0);
+        SearchRequest request = new SearchRequest(Entity.Inventoryequipment.getName(),Entity.Inventoryequipment.getName());
+        request.setQuery(query);
+        try {
+            SearchResponse response = this.dbClient.search(request);
+            AggregationEntries aggs = response.getAggregations(INVENTORY_PROPERTY_NODEID);
+            return new ArrayList<>(aggs.keySet());
+        } catch (IOException e) {
+            LOG.warn("problem reading nodes of inventory: ", e);
         }
-
+        return List.of();
     }
 
-    /**
-     * @param string
-     * @param slice
-     * @param filter
-     * @param mode
-     * @return
-     */
-    private DataTreeObject readInventoryTreeForNode(String nodeId, List<String> list, String filter)
-            throws IOException {
-        DataTreeObject tree = new DataTreeObject(INVENTORY_PROPERTY_PARENTUUID, INVENTORY_PROPERTY_UUID);
-        final String parentUuid = list.size() > 1 ? list.get(list.size() - 2) : null;
-        final String uuid = list.size() > 0 ? list.get(list.size() - 1) : null;
-        List<SearchHit> matches = this.search(Entity.Inventoryequipment, filter, INVENTORY_PROPERTY_NODEID, nodeId,
-                INVENTORY_PROPERTY_PARENTUUID, parentUuid, INVENTORY_PROPERTY_UUID, uuid, INVENTORY_PROPERTY_TREELEVEL);
-
-        //tree.a(subtreePath);
-        List<SearchHit> others = this.search(Entity.Inventoryequipment, (String) null, INVENTORY_PROPERTY_NODEID, nodeId,
-                null, null, null, null, INVENTORY_PROPERTY_TREELEVEL);
-        if (matches.size() > 0) {
-            int treeLevelToStart = (list == null || list.size() <= 0) ? 0 : list.size() - 1;
-            //build tree
-            JSONObject hitData;
-            //fill root elems
-            for (SearchHit hit : matches) {
-                hitData = hit.getSource();
-                if (hitData.getLong(INVENTORY_PROPERTY_TREELEVEL) == treeLevelToStart) {
-                    tree.put(hit.getId(),
-                            new DataTreeChildObject(hitData.getString(INVENTORY_PROPERTY_FOR_LABEL), true)
-                                    .setProperty(INVENTORY_PROPERTY_UUID, hitData.getString(INVENTORY_PROPERTY_UUID))
-                                    .setProperty(INVENTORY_PROPERTY_PARENTUUID,
-                                            hitData.getString(INVENTORY_PROPERTY_PARENTUUID)));
-                }
-            }
-            for (SearchHit hit : others) {
-                hitData = hit.getSource();
-                if (hitData.getLong(INVENTORY_PROPERTY_TREELEVEL) == treeLevelToStart) {
-                    tree.putIfNotExists(hit.getId(),
-                            new DataTreeChildObject(hitData.getString(INVENTORY_PROPERTY_FOR_LABEL), false)
-                                    .setProperty(INVENTORY_PROPERTY_UUID, hitData.getString(INVENTORY_PROPERTY_UUID))
-                                    .setProperty(INVENTORY_PROPERTY_PARENTUUID,
-                                            hitData.getString(INVENTORY_PROPERTY_PARENTUUID)));
-                }
-            }
-            //fill child elems
-            for (SearchHit hit : matches) {
-                hitData = hit.getSource();
-                if (hitData.getLong(INVENTORY_PROPERTY_TREELEVEL) > treeLevelToStart) {
-                    tree.put(hitData.getLong(INVENTORY_PROPERTY_TREELEVEL) - treeLevelToStart - 1, hit.getId(),
-                            new DataTreeChildObject(hitData.getString(INVENTORY_PROPERTY_FOR_LABEL), true)
-                                    .setProperty(INVENTORY_PROPERTY_UUID, hitData.getString(INVENTORY_PROPERTY_UUID))
-                                    .setProperty(INVENTORY_PROPERTY_PARENTUUID,
-                                            hitData.getString(INVENTORY_PROPERTY_PARENTUUID)));
-                }
-            }
-            for (SearchHit hit : others) {
-                hitData = hit.getSource();
-                if (hitData.getLong(INVENTORY_PROPERTY_TREELEVEL) > treeLevelToStart) {
-                    tree.putIfNotExists(hitData.getLong(INVENTORY_PROPERTY_TREELEVEL) - treeLevelToStart - 1, hit.getId(),
-                            new DataTreeChildObject(hitData.getString(INVENTORY_PROPERTY_FOR_LABEL), false)
-                                    .setProperty(INVENTORY_PROPERTY_UUID, hitData.getString(INVENTORY_PROPERTY_UUID))
-                                    .setProperty(INVENTORY_PROPERTY_PARENTUUID,
-                                            hitData.getString(INVENTORY_PROPERTY_PARENTUUID)));
-                }
-            }
-            tree.removeUnmatchedPaths();
-        }
-        return tree;
+    @Override
+    protected List<InventoryEntity> search(String filter, String sortOrderProperty, SortOrder sortOrder) {
+        return this.search(filter, null, null, null, sortOrderProperty, sortOrder);
     }
 
-    /**
-     * node will be root elements inventory information below from level-1
-     *
-     * @param filter
-     * @return
-     * @throws IOException
-     */
-    private DataTreeObject readInventoryTreeWithNode(String filter) throws IOException {
-        DataTreeObject tree = new DataTreeObject(INVENTORY_PROPERTY_PARENTUUID, INVENTORY_PROPERTY_UUID);
-
-        List<SearchHit> matches = this.search(Entity.Inventoryequipment, filter, INVENTORY_PROPERTY_TREELEVEL);
-        List<SearchHit> others = null;
-        if (matches.size() > 0) {
+    @Override
+    protected List<InventoryEntity> search(String filter, String nodeId, String parentUuid, String uuid, String sortOrderProperty, SortOrder sortOrder) {
+        QueryBuilder query =
+                filter == null ? QueryBuilders.matchAllQuery() : QueryBuilders.searchAllFieldsQuery(filter);
+        if ((nodeId != null) || (parentUuid != null)) {
+            BoolQueryBuilder bquery = new BoolQueryBuilder();
             if (filter != null) {
-                //find all parents up to tree-level 0
-                String nodeId = "";
-                List<String> alreadyInList = new ArrayList<>();
-                BoolQueryBuilder query2 = QueryBuilders.boolQuery();
-                for (SearchHit hit : matches) {
-                    nodeId = hit.getSource().getString(INVENTORY_PROPERTY_NODEID);
-                    if (alreadyInList.contains(nodeId)) {
-                        continue;
-                    }
-                    query2.should(QueryBuilders.matchQuery(INVENTORY_PROPERTY_NODEID, nodeId));
-                    alreadyInList.add(nodeId);
-                    tree.put(nodeId,
-                            new DataTreeChildObject(nodeId, false).setProperty(INVENTORY_PROPERTY_UUID, nodeId));
-
-                }
-                others = this.search(Entity.Inventoryequipment, query2, INVENTORY_PROPERTY_TREELEVEL);
-            } else {
-                AggregationEntries nodes = this.searchAggregated(Entity.Inventoryequipment, INVENTORY_PROPERTY_NODEID);
-                for (String node : nodes.keySet()) {
-                    tree.put(node, new DataTreeChildObject(node, false).setProperty(INVENTORY_PROPERTY_UUID, node));
-                }
-            }
-
-            //build tree
-            JSONObject hitData;
-            //fill root elems
-            for (SearchHit hit : matches) {
-                hitData = hit.getSource();
-                if (hitData.getLong(INVENTORY_PROPERTY_TREELEVEL) == 0) {
-                    tree.put(0, hit.getId(),
-                            new DataTreeChildObject(hitData.getString(INVENTORY_PROPERTY_FOR_LABEL), true)
-                                    .setProperty(INVENTORY_PROPERTY_UUID, hitData.getString(INVENTORY_PROPERTY_UUID))
-                                    .setProperty(INVENTORY_PROPERTY_PARENTUUID,
-                                            hitData.getString(INVENTORY_PROPERTY_NODEID)));
-                }
-            }
-            if (others != null) {
-                for (SearchHit hit : others) {
-                    hitData = hit.getSource();
-                    if (hitData.getLong(INVENTORY_PROPERTY_TREELEVEL) == 0) {
-                        tree.putIfNotExists(0, hit.getId(),
-                                new DataTreeChildObject(hitData.getString(INVENTORY_PROPERTY_FOR_LABEL), false)
-                                        .setProperty(INVENTORY_PROPERTY_UUID,
-                                                hitData.getString(INVENTORY_PROPERTY_UUID))
-                                        .setProperty(INVENTORY_PROPERTY_PARENTUUID,
-                                                hitData.getString(INVENTORY_PROPERTY_NODEID)));
-                    }
-                }
-            }
-            //fill child elements
-            for (SearchHit hit : matches) {
-                hitData = hit.getSource();
-                long treeLevel = hitData.getLong(INVENTORY_PROPERTY_TREELEVEL);
-                if (treeLevel > 0) {
-                    tree.put(treeLevel, hit.getId(),
-                            new DataTreeChildObject(hitData.getString(INVENTORY_PROPERTY_FOR_LABEL_CHILD), true)
-                                    .setProperty(INVENTORY_PROPERTY_UUID, hitData.getString(INVENTORY_PROPERTY_UUID))
-                                    .setProperty(INVENTORY_PROPERTY_PARENTUUID,
-                                            hitData.getString(INVENTORY_PROPERTY_PARENTUUID)));
-                }
+                bquery.must(query);
             }
-            if (others != null) {
-                for (SearchHit hit : others) {
-                    hitData = hit.getSource();
-                    long treeLevel = hitData.getLong(INVENTORY_PROPERTY_TREELEVEL);
-                    if (hitData.getLong(INVENTORY_PROPERTY_TREELEVEL) > 0) {
-                        tree.putIfNotExists(treeLevel, hit.getId(),
-                                new DataTreeChildObject(hitData.getString(INVENTORY_PROPERTY_FOR_LABEL_CHILD), false)
-                                        .setProperty(INVENTORY_PROPERTY_UUID,
-                                                hitData.getString(INVENTORY_PROPERTY_UUID))
-                                        .setProperty(INVENTORY_PROPERTY_PARENTUUID,
-                                                hitData.getString(INVENTORY_PROPERTY_PARENTUUID)));
-                    }
-                }
+            if (nodeId != null) {
+                bquery.must(QueryBuilders.matchQuery(INVENTORY_PROPERTY_NODEID, nodeId));
             }
-            tree.removeUnmatchedPaths();
+            query = bquery;
 
         }
-        return tree;
+        query.sort(sortOrderProperty, sortOrder);
+        return this.search(query);
     }
 
-
-
-    /**
-     * @param client
-     */
-    public void setDatabaseClient(HtDatabaseClient client) {
-        this.dbClient = client;
-
+    @Override
+    protected List<InventoryEntity> getItemsForNodes(List<String> nodeIds, String sortOrderProperty, SortOrder sortOrder) {
+        BoolQueryBuilder query = QueryBuilders.boolQuery();
+        nodeIds.forEach(e->query.should(QueryBuilders.matchQuery(INVENTORY_PROPERTY_NODEID,e)));
+        return this.search(query);
     }
+
 }
diff --git a/sdnr/wt/data-provider/provider/src/main/resources/org/opendaylight/blueprint/impl-blueprint.xml b/sdnr/wt/data-provider/provider/src/main/resources/org/opendaylight/blueprint/impl-blueprint.xml
index d5f8a991a..5a681d76f 100644
--- a/sdnr/wt/data-provider/provider/src/main/resources/org/opendaylight/blueprint/impl-blueprint.xml
+++ b/sdnr/wt/data-provider/provider/src/main/resources/org/opendaylight/blueprint/impl-blueprint.xml
@@ -29,42 +29,20 @@
     <reference id="rpcProviderService"
                interface="org.opendaylight.mdsal.binding.api.RpcProviderService"/>
     <reference id="dataBroker" interface="org.opendaylight.mdsal.binding.api.DataBroker"/>
- 
-    <bean id="aboutServlet"
-          class="org.onap.ccsdk.features.sdnr.wt.dataprovider.http.about.AboutHttpServlet">
-    </bean>
-    <service interface="javax.servlet.http.HttpServlet"
-             ref="aboutServlet">
-        <service-properties>
-            <entry key="alias" value="/about"/>
-        </service-properties>
-    </service>
+
+    <bean id="aboutServlet" class="org.onap.ccsdk.features.sdnr.wt.dataprovider.http.about.AboutHttpServlet" />
 
     <bean id="msServlet"
           class="org.onap.ccsdk.features.sdnr.wt.dataprovider.http.MsServlet">
     </bean>
-    <service interface="javax.servlet.http.HttpServlet" ref="msServlet">
-        <service-properties>
-            <entry key="alias" value="/ms"/>
-        </service-properties>
-    </service>
+
     <bean id="treeServlet"
           class="org.onap.ccsdk.features.sdnr.wt.dataprovider.http.DataTreeHttpServlet">
     </bean>
-    <service interface="javax.servlet.http.HttpServlet" ref="treeServlet">
-        <service-properties>
-            <entry key="alias" value="/tree"/>
-        </service-properties>
-    </service>
 
     <bean id="userdataServlet"
           class="org.onap.ccsdk.features.sdnr.wt.dataprovider.http.UserdataHttpServlet">
     </bean>
-    <service interface="javax.servlet.http.HttpServlet" ref="userdataServlet">
-        <service-properties>
-            <entry key="alias" value="/userdata"/>
-        </service-properties>
-    </service>
 
     <bean id="provider"
           class="org.onap.ccsdk.features.sdnr.wt.dataprovider.impl.DataProviderImpl"
@@ -80,12 +58,6 @@
     <bean id="yangServlet"
           class="org.onap.ccsdk.features.sdnr.wt.dataprovider.http.yangschema.YangSchemaHttpServlet">
     </bean>
-    <service interface="javax.servlet.http.HttpServlet"
-             ref="yangServlet">
-        <service-properties>
-            <entry key="alias" value="/yang-schema"/>
-        </service-properties>
-    </service>
 
     <service ref="provider"
              interface="org.onap.ccsdk.features.sdnr.wt.dataprovider.model.IEntityDataProvider"/>