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 java.util.ArrayList;
  23 import java.util.Iterator;
  24 import java.util.List;
  25
  26 import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversalSource;
  27 import org.apache.tinkerpop.gremlin.process.traversal.strategy.verification.ReadOnlyStrategy;
  28 import org.apache.tinkerpop.gremlin.structure.Graph;
  29 import org.apache.tinkerpop.gremlin.structure.Vertex;
  30 import org.apache.tinkerpop.gremlin.structure.VertexProperty;
  31
  32 import org.onap.aai.dbmap.DBConnectionType;
  33 import org.onap.aai.introspection.Loader;
  34 import org.onap.aai.query.builder.GremlinTraversal;
  35 import org.onap.aai.query.builder.GremlinUnique;
  36 import org.onap.aai.query.builder.QueryBuilder;
  37 import org.onap.aai.query.builder.TraversalQuery;
  38 import org.onap.aai.serialization.db.InMemoryGraphSingleton;
  39 import org.onap.aai.serialization.engines.query.GraphTraversalQueryEngine;
  40 import org.onap.aai.serialization.engines.query.QueryEngine;
  41 import org.onap.aai.serialization.engines.TransactionalGraphEngine;
  42
  43 import org.janusgraph.core.JanusGraph;
  44
  45 public class InMemoryDBEngine extends TransactionalGraphEngine {
  46
  47         /**
  48          * Instantiates a new JanusGraph DB engine.
  49          *
  50          * @param style
  51          *            the style
  52          * @param loader
  53          *            the loader
  54          */
  55         private JanusGraph graph = null;
  56
  57         private static final TransactionalGraphEngine.Admin admin = null;
  58
  59         public InMemoryDBEngine(QueryStyle style, DBConnectionType connectionType, Loader loader, JanusGraph graph) {
  60                 super(style, loader, connectionType, InMemoryGraphSingleton.getInstance(graph));
  61                 this.graph = graph;
  62         }
  63
  64         /**
  65          * Instantiates a new JanusGraph DB engine.
  66          *
  67          * @param style
  68          *            the style
  69          * @param loader
  70          *            the loader
  71          * @param connect
  72          *            the connect
  73          */
  74         public InMemoryDBEngine(QueryStyle style, Loader loader, boolean connect, JanusGraph graph) {
  75                 super(style, loader);
  76                 if (connect) {
  77                         this.singleton = InMemoryGraphSingleton.getInstance(graph);
  78                 }
  79                 this.graph = graph;
  80         }
  81
  82         @Override
  83         public QueryEngine getQueryEngine() {
  84
  85                 if (style.equals(QueryStyle.TRAVERSAL)) {
  86
  87                         GraphTraversalSource traversalSource = graph.traversal();
  88                         return new GraphTraversalQueryEngine(traversalSource);
  89
  90                 } else {
  91                         throw new IllegalArgumentException("Query Engine type not recognized");
  92                 }
  93
  94         }
  95
  96         @Override
  97         public QueryBuilder<Vertex> getQueryBuilder(QueryStyle style, Loader loader) {
  98                 if (style.equals(QueryStyle.GREMLIN_TRAVERSAL)) {
  99                         return new GremlinTraversal<>(loader, graph.traversal());
 100                 } else if (style.equals(QueryStyle.TRAVERSAL)) {
 101                         return new TraversalQuery<>(loader, graph.traversal());
 102
 103                 } else {
 104                         throw new IllegalArgumentException("Query Builder type is Not recognized");
 105                 }
 106
 107         }
 108
 109         /**
 110          * {@inheritDoc}
 111          */
 112         @Override
 113         public boolean setListProperty(Vertex v, String name, List<?> objs) {
 114
 115                 // clear out list full replace style
 116
 117                 Iterator<VertexProperty<Object>> iterator = v.properties(name);
 118                 while (iterator.hasNext()) {
 119                         iterator.next().remove();
 120                 }
 121                 if (objs != null) {
 122                         for (Object obj : objs) {
 123                                 v.property(name, obj);
 124                         }
 125                 }
 126                 return true;
 127         }
 128
 129         /**
 130          * {@inheritDoc}
 131          */
 132         @Override
 133         public List<Object> getListProperty(Vertex v, String name) {
 134
 135                 List<Object> result = new ArrayList<>();
 136
 137                 Iterator<VertexProperty<Object>> iterator = v.properties(name);
 138
 139                 while (iterator.hasNext()) {
 140                         result.add(iterator.next().value());
 141                 }
 142
 143                 if (result.isEmpty()) {
 144                         result = null;
 145                 }
 146
 147                 return result;
 148
 149         }
 150
 151         @Override
 152         public QueryBuilder<Vertex> getQueryBuilder() {
 153                 return getQueryBuilder(this.loader);
 154         }
 155
 156         @Override
 157         public QueryBuilder<Vertex> getQueryBuilder(Loader loader) {
 158                 if (style.equals(QueryStyle.GREMLIN_TRAVERSAL)) {
 159                         return new GremlinTraversal<>(loader, this.asAdmin().getTraversalSource());
 160                 } else if (style.equals(QueryStyle.GREMLIN_UNIQUE)) {
 161                         return new GremlinUnique<>(loader, this.asAdmin().getTraversalSource());
 162                 } else if (style.equals(QueryStyle.TRAVERSAL)) {
 163                         return new TraversalQuery<>(loader, graph.traversal());
 164                 } else {
 165                         throw new IllegalArgumentException("Query Builder type not recognized");
 166                 }
 167
 168         }
 169
 170         @Override
 171         public QueryBuilder<Vertex> getQueryBuilder(Vertex start) {
 172                 return getQueryBuilder(this.loader, start);
 173         }
 174
 175         public GraphTraversalSource getTraversalSource() {
 176                 return graph.traversal();
 177         }
 178
 179         @Override
 180         public QueryBuilder<Vertex> getQueryBuilder(Loader loader, Vertex start) {
 181                 if (style.equals(QueryStyle.GREMLIN_TRAVERSAL)) {
 182                         return new GremlinTraversal<>(loader, graph.traversal(), start);
 183                 } else if (style.equals(QueryStyle.GREMLIN_UNIQUE)) {
 184                         return new GremlinUnique<>(loader, this.asAdmin().getTraversalSource(), start);
 185                 } else if (style.equals(QueryStyle.TRAVERSAL)) {
 186                         return new TraversalQuery<>(loader, graph.traversal(), start);
 187                 } else {
 188                         throw new IllegalArgumentException("Query Builder type not recognized");
 189                 }
 190
 191         }
 192
 193         @Override
 194         public Graph startTransaction() {
 195                 if (this.tx() == null) {
 196                         this.currentTx = graph.newTransaction();
 197                         this.currentTraversal = this.tx().traversal();
 198                         this.readOnlyTraversal = this.tx()
 199                                         .traversal(GraphTraversalSource.build().with(ReadOnlyStrategy.instance()));
 200                 }
 201                 return currentTx;
 202         }
 203
 204
 205
 206 }