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         DatastoreContextIntrospector introspector = new DatastoreContextIntrospector(datastoreContext);
  29         DatastoreContextConfigAdminOverlay overlay = new DatastoreContextConfigAdminOverlay(
  30                 introspector, bundleContext);
  31
  32         ActorSystem actorSystem = getOrCreateInstance(bundleContext, datastoreContext.getConfigurationReader());
  33         Configuration config = new ConfigurationImpl("module-shards.conf", "modules.conf");
  34         final DistributedDataStore dataStore = new DistributedDataStore(actorSystem,
  35                 new ClusterWrapperImpl(actorSystem), config, introspector.getContext());
  36
  37         ShardStrategyFactory.setConfiguration(config);
  38         schemaService.registerSchemaContextListener(dataStore);
  39
  40         dataStore.setCloseable(overlay);
  41         return dataStore;
  42     }
  43
  44     private static final ActorSystem getOrCreateInstance(final BundleContext bundleContext, ConfigurationReader configurationReader) {
  45         ActorSystem ret = persistentActorSystem;
  46         if (ret == null) {
  47             synchronized (DistributedDataStoreFactory.class) {
  48                 ret = persistentActorSystem;
  49                 if (ret == null) {
  50                     // Create an OSGi bundle classloader for actor system
  51                     BundleDelegatingClassLoader classLoader = new BundleDelegatingClassLoader(bundleContext.getBundle(),
  52                         Thread.currentThread().getContextClassLoader());
  53
  54                     ret = ActorSystem.create(ACTOR_SYSTEM_NAME,
  55                         ConfigFactory.load(configurationReader.read()).getConfig(CONFIGURATION_NAME), classLoader);
  56                     ret.actorOf(Props.create(TerminationMonitor.class), "termination-monitor");
  57
  58                     persistentActorSystem = ret;
  59                 }
  60             }
  61         }
  62
  63         return ret;
  64     }
  65 }