aai-core/src/main/java/org/onap/aai/serialization/engines/InMemoryDBEngine.java

   1 /**
   2  * ============LICENSE_START=======================================================
   3  * org.onap.aai
   4  * ================================================================================
   5  * Copyright © 2017-2018 AT&T Intellectual Property. All rights reserved.
   6  * ================================================================================
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * You may obtain a copy of the License at
  10  *
  11  *    http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  * ============LICENSE_END=========================================================
  19  */
  20 package org.onap.aai.serialization.engines;
  21
  22 import org.janusgraph.core.JanusGraph;
  23 import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversalSource;
  24 import org.apache.tinkerpop.gremlin.process.traversal.strategy.verification.ReadOnlyStrategy;
  25 import org.apache.tinkerpop.gremlin.structure.Graph;
  26 import org.apache.tinkerpop.gremlin.structure.Vertex;
  27 import org.apache.tinkerpop.gremlin.structure.VertexProperty;
  28 import org.onap.aai.dbmap.DBConnectionType;
  29 import org.onap.aai.introspection.Loader;
  30 import org.onap.aai.query.builder.*;
  31 import org.onap.aai.serialization.db.InMemoryGraphSingleton;
  32 import org.onap.aai.serialization.engines.query.GraphTraversalQueryEngine;
  33 import org.onap.aai.serialization.engines.query.QueryEngine;
  34
  35 import java.util.ArrayList;
  36 import java.util.Iterator;
  37 import java.util.List;
  38
  39 public class InMemoryDBEngine extends TransactionalGraphEngine {
  40
  41         /**
  42          * Instantiates a new JanusGraph DB engine.
  43          *
  44          * @param style
  45          *            the style
  46          * @param loader
  47          *            the loader
  48          */
  49         private JanusGraph graph = null;
  50
  51         private static final TransactionalGraphEngine.Admin admin = null;
  52
  53         public InMemoryDBEngine(QueryStyle style, DBConnectionType connectionType, Loader loader, JanusGraph graph) {
  54                 super(style, loader, connectionType, InMemoryGraphSingleton.getInstance(graph));
  55                 this.graph = graph;
  56         }
  57
  58         /**
  59          * Instantiates a new JanusGraph DB engine.
  60          *
  61          * @param style
  62          *            the style
  63          * @param loader
  64          *            the loader
  65          * @param connect
  66          *            the connect
  67          */
  68         public InMemoryDBEngine(QueryStyle style, Loader loader, boolean connect, JanusGraph graph) {
  69                 super(style, loader);
  70                 if (connect) {
  71                         this.singleton = InMemoryGraphSingleton.getInstance(graph);
  72                 }
  73                 this.graph = graph;
  74         }
  75
  76         @Override
  77         public QueryEngine getQueryEngine() {
  78
  79                 if (style.equals(QueryStyle.TRAVERSAL) || style.equals(QueryStyle.TRAVERSAL_URI)) {
  80
  81                         GraphTraversalSource traversalSource = graph.traversal();
  82                         return new GraphTraversalQueryEngine(traversalSource);
  83
  84                 } else {
  85                         throw new IllegalArgumentException("Query Engine type not recognized");
  86                 }
  87
  88         }
  89
  90         @Override
  91         public QueryBuilder<Vertex> getQueryBuilder(QueryStyle style, Loader loader) {
  92                 if (style.equals(QueryStyle.GREMLIN_TRAVERSAL)) {
  93                         return new GremlinTraversal<>(loader, graph.traversal());
  94                 } else if (style.equals(QueryStyle.TRAVERSAL)) {
  95                         return new TraversalQuery<>(loader, graph.traversal());
  96                 } else if (style.equals(QueryStyle.TRAVERSAL_URI)) {
  97                         return new TraversalURIOptimizedQuery<>(loader, graph.traversal());
  98                 } else {
  99                         throw new IllegalArgumentException("Query Builder type is Not recognized");
 100                 }
 101
 102         }
 103
 104         /**
 105          * {@inheritDoc}
 106          */
 107         @Override
 108         public boolean setListProperty(Vertex v, String name, List<?> objs) {
 109
 110                 // clear out list full replace style
 111
 112                 Iterator<VertexProperty<Object>> iterator = v.properties(name);
 113                 while (iterator.hasNext()) {
 114                         iterator.next().remove();
 115                 }
 116                 if (objs != null) {
 117                         for (Object obj : objs) {
 118                                 v.property(name, obj);
 119                         }
 120                 }
 121                 return true;
 122         }
 123
 124         /**
 125          * {@inheritDoc}
 126          */
 127         @Override
 128         public List<Object> getListProperty(Vertex v, String name) {
 129
 130                 List<Object> result = new ArrayList<>();
 131
 132                 Iterator<VertexProperty<Object>> iterator = v.properties(name);
 133
 134                 while (iterator.hasNext()) {
 135                         result.add(iterator.next().value());
 136                 }
 137
 138                 if (result.isEmpty()) {
 139                         result = null;
 140                 }
 141
 142                 return result;
 143
 144         }
 145
 146         @Override
 147         public QueryBuilder<Vertex> getQueryBuilder() {
 148                 return getQueryBuilder(this.loader);
 149         }
 150
 151         @Override
 152         public QueryBuilder<Vertex> getQueryBuilder(Loader loader) {
 153                 if (style.equals(QueryStyle.GREMLIN_TRAVERSAL)) {
 154                         return new GremlinTraversal<>(loader, this.asAdmin().getTraversalSource());
 155                 } else if (style.equals(QueryStyle.GREMLIN_UNIQUE)) {
 156                         return new GremlinUnique<>(loader, this.asAdmin().getTraversalSource());
 157                 } else if (style.equals(QueryStyle.TRAVERSAL)) {
 158                         return new TraversalQuery<>(loader, graph.traversal());
 159                 } else if (style.equals(QueryStyle.TRAVERSAL_URI)) {
 160                         return new TraversalURIOptimizedQuery<>(loader, graph.traversal());
 161                 } else {
 162                         throw new IllegalArgumentException("Query Builder type not recognized");
 163                 }
 164
 165         }
 166
 167         @Override
 168         public QueryBuilder<Vertex> getQueryBuilder(Vertex start) {
 169                 return getQueryBuilder(this.loader, start);
 170         }
 171
 172         public GraphTraversalSource getTraversalSource() {
 173                 return graph.traversal();
 174         }
 175
 176         @Override
 177         public QueryBuilder<Vertex> getQueryBuilder(Loader loader, Vertex start) {
 178                 if (style.equals(QueryStyle.GREMLIN_TRAVERSAL)) {
 179                         return new GremlinTraversal<>(loader, graph.traversal(), start);
 180                 } else if (style.equals(QueryStyle.GREMLIN_UNIQUE)) {
 181                         return new GremlinUnique<>(loader, this.asAdmin().getTraversalSource(), start);
 182                 } else if (style.equals(QueryStyle.TRAVERSAL)) {
 183                         return new TraversalQuery<>(loader, graph.traversal(), start);
 184                 } else if (style.equals(QueryStyle.TRAVERSAL_URI)) {
 185                         return new TraversalURIOptimizedQuery<>(loader, graph.traversal(), start);
 186                 } else {
 187                         throw new IllegalArgumentException("Query Builder type not recognized");
 188                 }
 189
 190         }
 191
 192         @Override
 193         public Graph startTransaction() {
 194                 if (this.tx() == null) {
 195                         this.currentTx = graph.newTransaction();
 196                         this.currentTraversal = this.tx().traversal();
 197                         this.readOnlyTraversal = this.tx()
 198                                         .traversal(GraphTraversalSource.build().with(ReadOnlyStrategy.instance()));
 199                 }
 200                 return currentTx;
 201         }
 202
 203
 204
 205 }