CDS: Implement front-end support for local transactions
[controller.git] / opendaylight / md-sal / sal-distributed-datastore / src / main / java / org / opendaylight / controller / cluster / datastore / DistributedDataStoreFactory.java
index 004faf2..ee8ac61 100644 (file)
@@ -5,62 +5,90 @@
  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
  * and is available at http://www.eclipse.org/legal/epl-v10.html
  */
-
 package org.opendaylight.controller.cluster.datastore;
 
 import akka.actor.ActorSystem;
 import akka.actor.Props;
 import akka.osgi.BundleDelegatingClassLoader;
+import com.google.common.base.Preconditions;
 import com.typesafe.config.ConfigFactory;
+import java.util.HashSet;
+import java.util.Set;
+import java.util.concurrent.TimeUnit;
 import org.opendaylight.controller.cluster.datastore.config.ConfigurationReader;
 import org.opendaylight.controller.cluster.datastore.shardstrategy.ShardStrategyFactory;
 import org.opendaylight.controller.sal.core.api.model.SchemaService;
 import org.osgi.framework.BundleContext;
-
-import java.util.concurrent.atomic.AtomicReference;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import scala.concurrent.duration.Duration;
 
 public class DistributedDataStoreFactory {
+    private static final String ACTOR_SYSTEM_NAME = "opendaylight-cluster-data";
+    private static final String CONFIGURATION_NAME = "odl-cluster-data";
+    private static ActorSystem actorSystem = null;
+    private static final Set<DistributedDataStore> createdInstances = new HashSet<>(2);
+    private static final Logger LOG = LoggerFactory.getLogger(DistributedDataStoreFactory.class);
 
-    public static final String ACTOR_SYSTEM_NAME = "opendaylight-cluster-data";
-
-    public static final String CONFIGURATION_NAME = "odl-cluster-data";
+    public static synchronized DistributedDataStore createInstance(SchemaService schemaService,
+            DatastoreContext datastoreContext, BundleContext bundleContext) {
 
-    private static AtomicReference<ActorSystem> persistentActorSystem = new AtomicReference<>();
+        LOG.info("Create data store instance of type : {}", datastoreContext.getDataStoreType());
 
-    public static DistributedDataStore createInstance(String name, SchemaService schemaService,
-                                                      DatastoreContext datastoreContext, BundleContext bundleContext) {
+        DatastoreContextIntrospector introspector = new DatastoreContextIntrospector(datastoreContext);
+        DatastoreContextConfigAdminOverlay overlay = new DatastoreContextConfigAdminOverlay(
+                introspector, bundleContext);
 
-        ActorSystem actorSystem = getOrCreateInstance(bundleContext, datastoreContext.getConfigurationReader());
+        ActorSystem actorSystem = getActorSystem(bundleContext, datastoreContext.getConfigurationReader());
         Configuration config = new ConfigurationImpl("module-shards.conf", "modules.conf");
-        final DistributedDataStore dataStore =
-                new DistributedDataStore(actorSystem, name, new ClusterWrapperImpl(actorSystem),
-                        config, datastoreContext);
+        final DistributedDataStore dataStore = new DistributedDataStore(actorSystem,
+                new ClusterWrapperImpl(actorSystem), config, introspector.getContext());
+
+        overlay.setListener(dataStore);
 
         ShardStrategyFactory.setConfiguration(config);
         schemaService.registerSchemaContextListener(dataStore);
+
+        dataStore.setCloseable(overlay);
+        dataStore.waitTillReady();
+
+        createdInstances.add(dataStore);
         return dataStore;
     }
 
-    synchronized private static final ActorSystem getOrCreateInstance(final BundleContext bundleContext, ConfigurationReader configurationReader) {
-
-        AtomicReference<ActorSystem> actorSystemReference = persistentActorSystem;
-        String configurationName = CONFIGURATION_NAME;
-        String actorSystemName = ACTOR_SYSTEM_NAME;
+    private static synchronized final ActorSystem getActorSystem(final BundleContext bundleContext,
+                                                                 ConfigurationReader configurationReader) {
+        if (actorSystem == null) {
+            // Create an OSGi bundle classloader for actor system
+            BundleDelegatingClassLoader classLoader = new BundleDelegatingClassLoader(bundleContext.getBundle(),
+                Thread.currentThread().getContextClassLoader());
 
-        if (actorSystemReference.get() != null){
-            return actorSystemReference.get();
+            actorSystem = ActorSystem.create(ACTOR_SYSTEM_NAME,
+                ConfigFactory.load(configurationReader.read()).getConfig(CONFIGURATION_NAME), classLoader);
+            actorSystem.actorOf(Props.create(TerminationMonitor.class), "termination-monitor");
         }
 
-        // Create an OSGi bundle classloader for actor system
-        BundleDelegatingClassLoader classLoader = new BundleDelegatingClassLoader(bundleContext.getBundle(),
-                Thread.currentThread().getContextClassLoader());
-
-        ActorSystem system = ActorSystem.create(actorSystemName,
-                ConfigFactory.load(configurationReader.read()).getConfig(configurationName), classLoader);
-        system.actorOf(Props.create(TerminationMonitor.class), "termination-monitor");
+        return actorSystem;
+    }
 
-        actorSystemReference.set(system);
-        return system;
+    public static synchronized void destroyInstance(DistributedDataStore dataStore){
+        Preconditions.checkNotNull(dataStore, "dataStore should not be null");
+
+        LOG.info("Destroy data store instance of type : {}", dataStore.getActorContext().getDataStoreType());
+
+        if(createdInstances.remove(dataStore)){
+            if(createdInstances.size() == 0){
+                if(actorSystem != null) {
+                    actorSystem.shutdown();
+                    try {
+                        actorSystem.awaitTermination(Duration.create(10, TimeUnit.SECONDS));
+                    } catch (Exception e) {
+                        LOG.warn("Error awaiting actor termination", e);
+                    }
+                    actorSystem = null;
+                }
+            }
+        }
     }
 
 }

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