aai-core/src/main/java/org/onap/aai/dbmap/InMemoryGraph.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
  21 package org.onap.aai.dbmap;
  22
  23 import com.att.eelf.configuration.EELFLogger;
  24 import com.att.eelf.configuration.EELFManager;
  25 import java.io.FileInputStream;
  26 import java.io.IOException;
  27 import java.io.InputStream;
  28 import java.util.Properties;
  29 import org.apache.tinkerpop.gremlin.structure.io.IoCore;
  30 import org.janusgraph.core.JanusGraph;
  31 import org.janusgraph.core.JanusGraphFactory;
  32 import org.janusgraph.core.JanusGraphTransaction;
  33 import org.janusgraph.core.schema.JanusGraphManagement;
  34 import org.onap.aai.dbgen.GraphSONPartialIO;
  35 import org.onap.aai.dbgen.SchemaGenerator;
  36
  37 public class InMemoryGraph {
  38
  39     private static final EELFLogger LOGGER = EELFManager.getInstance().getLogger(InMemoryGraph.class);
  40     private JanusGraph graph = null;
  41
  42     public InMemoryGraph(final Builder builder) throws IOException {
  43         /*
  44          * Create a In-memory graph
  45          */
  46         try (final InputStream is = new FileInputStream(builder.propertyFile);) {
  47             graph = JanusGraphFactory.open(builder.propertyFile);
  48
  49             final Properties graphProps = new Properties();
  50             graphProps.load(is);
  51             final JanusGraphManagement graphMgt = graph.openManagement();
  52             if (builder.isSchemaEnabled) {
  53                 LOGGER.info("Schema Enabled");
  54                 SchemaGenerator.loadSchemaIntoJanusGraph(graph, graphMgt, graphProps.getProperty("storage.backend"));
  55             }
  56             try (final JanusGraphTransaction transaction = graph.newTransaction();) {
  57                 LOGGER.info("Loading snapshot");
  58                 if (builder.isPartialGraph) {
  59                     if ((builder.graphsonLocation != null) && (builder.graphsonLocation.length() > 0)) {
  60                         transaction.io(GraphSONPartialIO.build()).readGraph(builder.graphsonLocation);
  61                     } else {
  62                         transaction.io(GraphSONPartialIO.build()).reader().create().readGraph(builder.seqInputStream,
  63                             graph);
  64                     }
  65                 } else {
  66                     if ((builder.graphsonLocation != null) && (builder.graphsonLocation.length() > 0)) {
  67                         transaction.io(IoCore.graphson()).readGraph(builder.graphsonLocation);
  68                     } else {
  69                         transaction.io(IoCore.graphson()).reader().create().readGraph(builder.seqInputStream, graph);
  70                     }
  71                 }
  72                 transaction.commit();
  73             } catch (final IOException e) {
  74                 LOGGER.error("ERROR: Could not load datasnapshot to in memory graph. \n", e);
  75                 throw new IllegalStateException("Could not load datasnapshot to in memory graph");
  76             }
  77
  78         } catch (final IOException e) {
  79             LOGGER.error("ERROR: Could not load datasnapshot to in memory graph. \n", e);
  80             throw new IllegalStateException("Could not load datasnapshot to in memory graph");
  81         }
  82     }
  83
  84     public static class Builder {
  85         private String graphsonLocation = "";
  86         private String propertyFile = "";
  87         private boolean isSchemaEnabled = false;
  88         private InputStream seqInputStream = null;
  89         private boolean isPartialGraph = false;
  90
  91         /*
  92          * Builder constructor doesnt do anything
  93          */
  94         public Builder() {
  95             // Do nothing
  96         }
  97
  98         public InMemoryGraph build(String graphsonFile, String propertyFile, boolean isSchemaEnabled)
  99                 throws IOException {
 100             this.graphsonLocation = graphsonFile;
 101             this.propertyFile = propertyFile;
 102             this.isSchemaEnabled = isSchemaEnabled;
 103             return new InMemoryGraph(this);
 104         }
 105
 106         public InMemoryGraph build(InputStream sis, String propertyFile, boolean isSchemaEnabled) throws IOException {
 107             this.graphsonLocation = null;
 108             this.propertyFile = propertyFile;
 109             this.isSchemaEnabled = isSchemaEnabled;
 110             this.seqInputStream = sis;
 111             return new InMemoryGraph(this);
 112         }
 113
 114         public InMemoryGraph build(String graphsonFile, String propertyFile, boolean isSchemaEnabled,
 115                 boolean isPartialGraph) throws IOException {
 116             this.graphsonLocation = graphsonFile;
 117             this.propertyFile = propertyFile;
 118             this.isSchemaEnabled = isSchemaEnabled;
 119             this.isPartialGraph = isPartialGraph;
 120             return new InMemoryGraph(this);
 121         }
 122
 123         public InMemoryGraph build(InputStream sis, String propertyFile, boolean isSchemaEnabled,
 124                 boolean isPartialGraph) throws IOException {
 125             this.graphsonLocation = null;
 126             this.propertyFile = propertyFile;
 127             this.isSchemaEnabled = isSchemaEnabled;
 128             this.seqInputStream = sis;
 129             this.isPartialGraph = isPartialGraph;
 130             return new InMemoryGraph(this);
 131         }
 132     }
 133
 134     public JanusGraph getGraph() {
 135         return graph;
 136     }
 137
 138 }