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