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.google.common.base.Preconditions;
  14 import com.typesafe.config.ConfigFactory;
  15 import java.util.HashSet;
  16 import java.util.Set;
  17 import java.util.concurrent.TimeUnit;
  18 import org.opendaylight.controller.cluster.common.actor.AkkaConfigurationReader;
  19 import org.opendaylight.controller.cluster.datastore.config.Configuration;
  20 import org.opendaylight.controller.cluster.datastore.config.ConfigurationImpl;
  21 import org.opendaylight.controller.cluster.datastore.shardstrategy.ShardStrategyFactory;
  22 import org.opendaylight.controller.sal.core.api.model.SchemaService;
  23 import org.osgi.framework.BundleContext;
  24 import org.slf4j.Logger;
  25 import org.slf4j.LoggerFactory;
  26 import scala.concurrent.duration.Duration;
  27
  28 public class DistributedDataStoreFactory {
  29     private static final String ACTOR_SYSTEM_NAME = "opendaylight-cluster-data";
  30     private static final String CONFIGURATION_NAME = "odl-cluster-data";
  31     private static ActorSystem actorSystem = null;
  32     private static final Set<DistributedDataStore> createdInstances = new HashSet<>(2);
  33     private static final Logger LOG = LoggerFactory.getLogger(DistributedDataStoreFactory.class);
  34
  35     public static synchronized DistributedDataStore createInstance(SchemaService schemaService,
  36             DatastoreContext datastoreContext, BundleContext bundleContext) {
  37
  38         LOG.info("Create data store instance of type : {}", datastoreContext.getDataStoreType());
  39
  40         DatastoreContextIntrospector introspector = new DatastoreContextIntrospector(datastoreContext);
  41         DatastoreContextConfigAdminOverlay overlay = new DatastoreContextConfigAdminOverlay(
  42                 introspector, bundleContext);
  43
  44         ActorSystem actorSystem = getActorSystem(bundleContext, datastoreContext.getConfigurationReader());
  45         Configuration config = new ConfigurationImpl("module-shards.conf", "modules.conf");
  46         final DistributedDataStore dataStore = new DistributedDataStore(actorSystem,
  47                 new ClusterWrapperImpl(actorSystem), config, introspector.getContext());
  48
  49         overlay.setListener(dataStore);
  50
  51         ShardStrategyFactory.setConfiguration(config);
  52         schemaService.registerSchemaContextListener(dataStore);
  53
  54         dataStore.setCloseable(overlay);
  55         dataStore.waitTillReady();
  56
  57         createdInstances.add(dataStore);
  58         return dataStore;
  59     }
  60
  61     private static synchronized final ActorSystem getActorSystem(final BundleContext bundleContext,
  62                                                                  AkkaConfigurationReader configurationReader) {
  63         if (actorSystem == null) {
  64             // Create an OSGi bundle classloader for actor system
  65             BundleDelegatingClassLoader classLoader = new BundleDelegatingClassLoader(bundleContext.getBundle(),
  66                 Thread.currentThread().getContextClassLoader());
  67
  68             actorSystem = ActorSystem.create(ACTOR_SYSTEM_NAME,
  69                 ConfigFactory.load(configurationReader.read()).getConfig(CONFIGURATION_NAME), classLoader);
  70             actorSystem.actorOf(Props.create(TerminationMonitor.class), "termination-monitor");
  71         }
  72
  73         return actorSystem;
  74     }
  75
  76     public static synchronized void destroyInstance(DistributedDataStore dataStore){
  77         Preconditions.checkNotNull(dataStore, "dataStore should not be null");
  78
  79         LOG.info("Destroy data store instance of type : {}", dataStore.getActorContext().getDataStoreType());
  80
  81         if(createdInstances.remove(dataStore)){
  82             if(createdInstances.size() == 0){
  83                 if(actorSystem != null) {
  84                     actorSystem.shutdown();
  85                     try {
  86                         actorSystem.awaitTermination(Duration.create(10, TimeUnit.SECONDS));
  87                     } catch (Exception e) {
  88                         LOG.warn("Error awaiting actor termination", e);
  89                     }
  90                     actorSystem = null;
  91                 }
  92             }
  93         }
  94     }
  95
  96 }