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 package org.onap.aai.dbmap;
  21
  22 import java.io.FileInputStream;
  23 import java.io.IOException;
  24 import java.io.InputStream;
  25
  26 import java.util.Properties;
  27
  28 import org.apache.commons.lang.exception.ExceptionUtils;
  29 import org.apache.tinkerpop.gremlin.structure.io.IoCore;
  30 import org.onap.aai.dbgen.SchemaGenerator;
  31 import org.onap.aai.logging.LogFormatTools;
  32
  33 import org.janusgraph.core.JanusGraphFactory;
  34 import org.janusgraph.core.JanusGraph;
  35 import org.janusgraph.core.JanusGraphTransaction;
  36 import org.janusgraph.core.schema.JanusGraphManagement;
  37
  38 import com.att.eelf.configuration.EELFLogger;
  39 import com.att.eelf.configuration.EELFManager;
  40
  41 public class InMemoryGraph {
  42
  43         private static final EELFLogger LOGGER = EELFManager.getInstance().getLogger(InMemoryGraph.class);
  44         private JanusGraph graph = null;
  45
  46
  47         public InMemoryGraph(Builder builder) throws IOException  {
  48                 /*
  49                  * Create a In-memory graph
  50                  */
  51                 InputStream is = new FileInputStream(builder.propertyFile);
  52                 try {
  53                         graph = JanusGraphFactory.open(builder.propertyFile);
  54
  55                         Properties graphProps = new Properties();
  56                         graphProps.load(is);
  57                         JanusGraphManagement graphMgt = graph.openManagement();
  58             if(builder.isSchemaEnabled){
  59                 LOGGER.info("Schema Enabled");
  60                 SchemaGenerator.loadSchemaIntoJanusGraph(graph, graphMgt);
  61             }
  62                         JanusGraphTransaction transaction = graph.newTransaction();
  63                         LOGGER.info("Loading snapshot");
  64                         transaction.io(IoCore.graphson()).readGraph(builder.graphsonLocation);
  65                         transaction.commit();
  66
  67                 } catch (Exception e) {
  68                         // TODO : Changesysout to logger
  69                         LOGGER.error(
  70                                         "ERROR: Could not load datasnapshot to in memory graph. \n" + LogFormatTools.getStackTop(e));
  71                         throw new IllegalStateException("Could not load datasnapshot to in memory graph");
  72
  73                 }
  74                 finally{
  75                         is.close();
  76                 }
  77
  78         }
  79
  80         public static class Builder {
  81                 private String graphsonLocation = "";
  82                 private String propertyFile = "";
  83                 private boolean isSchemaEnabled = false;
  84
  85                 /*
  86                  * Builder constructor doesnt do anything
  87                  */
  88                 public Builder() {
  89                         //Do nothing
  90                 }
  91
  92                 public InMemoryGraph build(String graphsonFile, String propertyFile, boolean isSchemaEnabled) throws IOException {
  93                         this.graphsonLocation = graphsonFile;
  94                         this.propertyFile = propertyFile;
  95                         this.isSchemaEnabled = isSchemaEnabled;
  96                         return new InMemoryGraph(this);
  97                 }
  98         }
  99
 100         public JanusGraph getGraph() {
 101                 return graph;
 102         }
 103
 104 }