opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/DistributedDataStoreFactory.java

   1 /*
   2  * Copyright (c) 2014 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.controller.cluster.datastore;
   9
  10 import akka.actor.ActorSystem;
  11 import akka.actor.Props;
  12 import akka.osgi.BundleDelegatingClassLoader;
  13 import com.typesafe.config.ConfigFactory;
  14 import org.opendaylight.controller.cluster.datastore.config.ConfigurationReader;
  15 import org.opendaylight.controller.cluster.datastore.shardstrategy.ShardStrategyFactory;
  16 import org.opendaylight.controller.sal.core.api.model.SchemaService;
  17 import org.osgi.framework.BundleContext;
  18
  19 public class DistributedDataStoreFactory {
  20     private static final String ACTOR_SYSTEM_NAME = "opendaylight-cluster-data";
  21     private static final String CONFIGURATION_NAME = "odl-cluster-data";
  22
  23     private static volatile ActorSystem persistentActorSystem = null;
  24
  25     public static DistributedDataStore createInstance(SchemaService schemaService,
  26                                                       DatastoreContext datastoreContext, BundleContext bundleContext) {
  27
  28         ActorSystem actorSystem = getOrCreateInstance(bundleContext, datastoreContext.getConfigurationReader());
  29         Configuration config = new ConfigurationImpl("module-shards.conf", "modules.conf");
  30         final DistributedDataStore dataStore =
  31                 new DistributedDataStore(actorSystem, new ClusterWrapperImpl(actorSystem),
  32                         config, datastoreContext);
  33
  34         ShardStrategyFactory.setConfiguration(config);
  35         schemaService.registerSchemaContextListener(dataStore);
  36         return dataStore;
  37     }
  38
  39     private static final ActorSystem getOrCreateInstance(final BundleContext bundleContext, ConfigurationReader configurationReader) {
  40         ActorSystem ret = persistentActorSystem;
  41         if (ret == null) {
  42             synchronized (DistributedDataStoreFactory.class) {
  43                 ret = persistentActorSystem;
  44                 if (ret == null) {
  45                     // Create an OSGi bundle classloader for actor system
  46                     BundleDelegatingClassLoader classLoader = new BundleDelegatingClassLoader(bundleContext.getBundle(),
  47                         Thread.currentThread().getContextClassLoader());
  48
  49                     ret = ActorSystem.create(ACTOR_SYSTEM_NAME,
  50                         ConfigFactory.load(configurationReader.read()).getConfig(CONFIGURATION_NAME), classLoader);
  51                     ret.actorOf(Props.create(TerminationMonitor.class), "termination-monitor");
  52
  53                     persistentActorSystem = ret;
  54                 }
  55             }
  56         }
  57
  58         return ret;
  59     }
  60 }