aai-core/src/main/java/org/openecomp/aai/dbmap/AAIGraph.java

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  * org.openecomp.aai
   4  * ================================================================================
   5  * Copyright (C) 2017 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.openecomp.aai.dbmap;
  22
  23 import java.io.FileInputStream;
  24 import java.io.FileNotFoundException;
  25 import java.io.IOException;
  26 import java.io.InputStream;
  27 import java.util.HashMap;
  28 import java.util.Map;
  29 import java.util.Properties;
  30
  31 import org.apache.commons.lang.exception.ExceptionUtils;
  32 import org.apache.tinkerpop.gremlin.structure.io.IoCore;
  33
  34 import org.openecomp.aai.dbgen.SchemaGenerator;
  35 import org.openecomp.aai.exceptions.AAIException;
  36 import org.openecomp.aai.util.AAIConstants;
  37 import com.att.eelf.configuration.EELFLogger;
  38 import com.att.eelf.configuration.EELFManager;
  39 import com.thinkaurelius.titan.core.TitanFactory;
  40 import com.thinkaurelius.titan.core.TitanGraph;
  41 import com.thinkaurelius.titan.core.TitanTransaction;
  42 import com.thinkaurelius.titan.core.schema.TitanManagement;
  43
  44 /**
  45  * Database Mapping class which acts as the middle man between the REST
  46  * interface objects and Titan DB objects. This class provides methods to commit
  47  * the objects received on the REST interface into the Titan graph database as
  48  * vertices and edges. Transactions are also managed here by using a TitanGraph
  49  * object to load, commit/rollback and shutdown for each request. The data model
  50  * rules such as keys/required properties are handled by calling DBMeth methods
  51  * which are driven by a specification file in json.
  52  *
  53
  54  */
  55 public class AAIGraph {
  56
  57         protected Map<String, TitanGraph> graphs = new HashMap<>();
  58         protected static final String COMPONENT = "aaidbmap";
  59         private final String REALTIME_DB = "realtime";
  60         private final String CACHED_DB = "cached";
  61         private final EELFLogger logger = EELFManager.getInstance().getLogger(this.getClass().getSimpleName());
  62
  63
  64         /**
  65          * Instantiates a new AAI graph.
  66          */
  67         private AAIGraph() {
  68                 try {
  69                         String rtConfig = System.getProperty("realtime.db.config");
  70                         String cachedConfig = System.getProperty("cached.db.config");
  71                         if (rtConfig == null) {
  72                                 rtConfig = AAIConstants.REALTIME_DB_CONFIG;
  73                         }
  74                         if (cachedConfig == null) {
  75                                 cachedConfig = AAIConstants.CACHED_DB_CONFIG;
  76                         }
  77                         this.loadGraph(REALTIME_DB, rtConfig);
  78                         this.loadGraph(CACHED_DB, cachedConfig);
  79                 } catch (Exception e) {
  80                         throw new RuntimeException("Failed to instantiate graphs", e);
  81                 }
  82         }
  83
  84         private static class Helper {
  85                 private static final AAIGraph INSTANCE = new AAIGraph();
  86         }
  87
  88         /**
  89          * Gets the single instance of AAIGraph.
  90          *
  91          * @return single instance of AAIGraph
  92          */
  93         public static AAIGraph getInstance() {
  94                 return Helper.INSTANCE;
  95         }
  96
  97         private void loadGraph(String name, String configPath) throws AAIException {
  98                 try {
  99                         final TitanGraph graph = TitanFactory.open(configPath);
 100                         InputStream is = new FileInputStream(configPath);
 101                 Properties graphProps = new Properties();
 102                 graphProps.load(is);
 103
 104                         if (graphProps.get("storage.backend").equals("inmemory")) {
 105                                 // Load the propertyKeys, indexes and edge-Labels into the DB
 106                                 loadSchema(graph);
 107                                 if (graphProps.containsKey("load.snapshot.file")) {
 108                                         String value = graphProps.getProperty("load.snapshot.file");
 109                                         if ("true".equals(value)) {
 110                                                 try {
 111                                                         String location = System.getProperty("snapshot.location");
 112                                                         logAndPrint(logger, "Loading snapshot to inmemory graph.");
 113                                                         TitanTransaction transaction = graph.newTransaction();
 114                                                         transaction.io(IoCore.graphson()).readGraph(location);
 115                                                         transaction.commit();
 116                                                         logAndPrint(logger, "Snapshot loaded to inmemory graph.");
 117                                                 } catch (IOException e) {
 118                                                         graph.close();
 119                                                         logAndPrint(logger, "ERROR: Could not load datasnapshot to in memory graph. \n" + ExceptionUtils.getFullStackTrace(e));
 120                                                         System.exit(0);
 121                                                 }
 122                                         }
 123                                 }
 124                         }
 125
 126                         if (graph == null) {
 127                                 throw new AAIException("AAI_5102");
 128                         }
 129
 130                         graphs.put(name, graph);
 131                 } catch (FileNotFoundException fnfe) {
 132                         throw new AAIException("AAI_4001");
 133             } catch (IOException e) {
 134                         throw new AAIException("AAI_4002");
 135
 136             }
 137         }
 138
 139         private void loadSchema(TitanGraph graph) {
 140                 // Load the propertyKeys, indexes and edge-Labels into the DB
 141                 TitanManagement graphMgt = graph.openManagement();
 142
 143                 System.out.println("-- loading schema into Titan");
 144                 SchemaGenerator.loadSchemaIntoTitan( graph, graphMgt );
 145         }
 146
 147         /**
 148          * Graph shutdown.
 149          */
 150         public void graphShutdown() {
 151                 graphs.get(REALTIME_DB).close();
 152         }
 153
 154         /**
 155          * Gets the graph.
 156          *
 157          * @return the graph
 158          */
 159         public TitanGraph getGraph() {
 160                 return graphs.get(REALTIME_DB);
 161         }
 162
 163         public void graphShutdown(DBConnectionType connectionType) {
 164
 165                 graphs.get(this.getGraphName(connectionType)).close();
 166         }
 167
 168         public TitanGraph getGraph(DBConnectionType connectionType) {
 169                 return graphs.get(this.getGraphName(connectionType));
 170         }
 171
 172         private String getGraphName(DBConnectionType connectionType) {
 173                 String graphName = "";
 174                 if (DBConnectionType.CACHED.equals(connectionType)) {
 175                         graphName = this.CACHED_DB;
 176                 } else if (DBConnectionType.REALTIME.equals(connectionType)) {
 177                         graphName = this.REALTIME_DB;
 178                 }
 179
 180                 return graphName;
 181         }
 182
 183         private void logAndPrint(EELFLogger logger, String msg) {
 184                 System.out.println(msg);
 185                 logger.info(msg);
 186         }
 187 }