Bug 1534: Changed blocking calls to async in dist data store
[controller.git] / opendaylight / md-sal / sal-distributed-datastore / src / main / java / org / opendaylight / controller / cluster / datastore / DistributedDataStore.java
index 29fc259bb75935d25f13dcb8f7a0865f74f145cd..404a4e02033ea1c89f9fada4135cfe0e4b6a935e 100644 (file)
 package org.opendaylight.controller.cluster.datastore;
 
 import akka.actor.ActorRef;
-import akka.actor.ActorSelection;
 import akka.actor.ActorSystem;
-import akka.util.Timeout;
-import org.opendaylight.controller.cluster.datastore.messages.FindPrimary;
-import org.opendaylight.controller.cluster.datastore.messages.PrimaryFound;
+
+import com.google.common.base.Preconditions;
+import org.opendaylight.controller.cluster.datastore.identifiers.ShardManagerIdentifier;
 import org.opendaylight.controller.cluster.datastore.messages.RegisterChangeListener;
 import org.opendaylight.controller.cluster.datastore.messages.RegisterChangeListenerReply;
 import org.opendaylight.controller.cluster.datastore.messages.UpdateSchemaContext;
+import org.opendaylight.controller.cluster.datastore.shardstrategy.ShardStrategyFactory;
+import org.opendaylight.controller.cluster.datastore.utils.ActorContext;
 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataBroker;
 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeListener;
+import org.opendaylight.controller.md.sal.dom.store.impl.InMemoryDOMDataStoreConfigProperties;
 import org.opendaylight.controller.sal.core.spi.data.DOMStore;
 import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadTransaction;
 import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadWriteTransaction;
 import org.opendaylight.controller.sal.core.spi.data.DOMStoreTransactionChain;
 import org.opendaylight.controller.sal.core.spi.data.DOMStoreWriteTransaction;
 import org.opendaylight.yangtools.concepts.ListenerRegistration;
-import org.opendaylight.yangtools.yang.data.api.InstanceIdentifier;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
 import org.opendaylight.yangtools.yang.model.api.SchemaContextListener;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-import scala.concurrent.Await;
-import scala.concurrent.Future;
-import scala.concurrent.duration.Duration;
-import scala.concurrent.duration.FiniteDuration;
-
-import java.util.concurrent.TimeUnit;
-
-import static akka.pattern.Patterns.ask;
 
 /**
  *
  */
-public class DistributedDataStore implements DOMStore, SchemaContextListener {
+public class DistributedDataStore implements DOMStore, SchemaContextListener, AutoCloseable {
 
-    private static final Logger
-        LOG = LoggerFactory.getLogger(DistributedDataStore.class);
+    private static final Logger LOG = LoggerFactory.getLogger(DistributedDataStore.class);
 
-    final FiniteDuration ASK_DURATION = Duration.create(5, TimeUnit.SECONDS);
-    final Duration AWAIT_DURATION = Duration.create(5, TimeUnit.SECONDS);
+    private final ActorContext actorContext;
 
-    private final ActorRef shardManager;
-    private final ActorSystem actorSystem;
-    private final String type;
+    private SchemaContext schemaContext;
 
+    public DistributedDataStore(ActorSystem actorSystem, String type, ClusterWrapper cluster,
+            Configuration configuration, InMemoryDOMDataStoreConfigProperties dataStoreProperties) {
+        Preconditions.checkNotNull(actorSystem, "actorSystem should not be null");
+        Preconditions.checkNotNull(type, "type should not be null");
+        Preconditions.checkNotNull(cluster, "cluster should not be null");
+        Preconditions.checkNotNull(configuration, "configuration should not be null");
 
-    public DistributedDataStore(ActorSystem actorSystem, String type) {
-        this.actorSystem = actorSystem;
-        this.type = type;
-        shardManager = actorSystem.actorOf(ShardManager.props(type));
-    }
 
-    @Override
-    public <L extends AsyncDataChangeListener<InstanceIdentifier, NormalizedNode<?, ?>>> ListenerRegistration<L> registerChangeListener(
-        InstanceIdentifier path, L listener,
-        AsyncDataBroker.DataChangeScope scope) {
+        String shardManagerId = ShardManagerIdentifier.builder().type(type).build().toString();
 
-        ActorSelection primary = findPrimary();
+        LOG.info("Creating ShardManager : {}", shardManagerId);
 
-        ActorRef dataChangeListenerActor = actorSystem.actorOf(DataChangeListener.props());
-
-        Object result =
-            getResult(primary, new RegisterChangeListener(path, dataChangeListenerActor.path(),
-                AsyncDataBroker.DataChangeScope.BASE), ASK_DURATION);
+        this.actorContext = new ActorContext(actorSystem, actorSystem
+            .actorOf(ShardManager.props(type, cluster, configuration, dataStoreProperties),
+                shardManagerId ), cluster, configuration);
+    }
 
-        RegisterChangeListenerReply reply = (RegisterChangeListenerReply) result;
-        return new ListenerRegistrationProxy(reply.getListenerRegistrationPath());
+    public DistributedDataStore(ActorContext actorContext) {
+        this.actorContext = Preconditions.checkNotNull(actorContext, "actorContext should not be null");
     }
 
-    private ActorSelection findPrimary() {
-        Object result = getResult(shardManager, new FindPrimary(Shard.DEFAULT_NAME), ASK_DURATION);
 
-        if(result instanceof PrimaryFound){
-            PrimaryFound found = (PrimaryFound) result;
-            LOG.error("Primary found {}", found.getPrimaryPath());
+    @SuppressWarnings("unchecked")
+    @Override
+    public <L extends AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>>>
+                                              ListenerRegistration<L> registerChangeListener(
+        YangInstanceIdentifier path, L listener,
+        AsyncDataBroker.DataChangeScope scope) {
 
-            return actorSystem.actorSelection(found.getPrimaryPath());
-        }
-        throw new RuntimeException("primary was not found");
-    }
+        Preconditions.checkNotNull(path, "path should not be null");
+        Preconditions.checkNotNull(listener, "listener should not be null");
 
-    private Object getResult(ActorRef actor, Object message, FiniteDuration duration){
-        Future<Object> future =
-            ask(actor, message, new Timeout(duration));
+        LOG.debug("Registering listener: {} for path: {} scope: {}", listener, path, scope);
 
-        try {
-            return Await.result(future, AWAIT_DURATION);
-        } catch (Exception e) {
-            throw new RuntimeException(e);
-        }
-    }
+        ActorRef dataChangeListenerActor = actorContext.getActorSystem().actorOf(
+            DataChangeListener.props(schemaContext,listener,path ));
 
-    private Object getResult(ActorSelection actor, Object message, FiniteDuration duration){
-        Future<Object> future =
-            ask(actor, message, new Timeout(duration));
+        String shardName = ShardStrategyFactory.getStrategy(path).findShard(path);
 
-        try {
-            return Await.result(future, AWAIT_DURATION);
-        } catch (Exception e) {
-            throw new RuntimeException(e);
+        Object result = actorContext.executeLocalShardOperation(shardName,
+            new RegisterChangeListener(path, dataChangeListenerActor.path(), scope),
+            ActorContext.ASK_DURATION);
+
+        if (result != null) {
+            RegisterChangeListenerReply reply = (RegisterChangeListenerReply) result;
+            return new DataChangeListenerRegistrationProxy(actorContext
+                .actorSelection(reply.getListenerRegistrationPath()), listener,
+                dataChangeListenerActor);
         }
-    }
 
+        LOG.debug(
+            "No local shard for shardName {} was found so returning a noop registration",
+            shardName);
+
+        return new NoOpDataChangeListenerRegistration(listener);
+    }
 
     @Override
     public DOMStoreTransactionChain createTransactionChain() {
-        return new TransactionChainProxy();
+        return new TransactionChainProxy(actorContext, schemaContext);
     }
 
     @Override
     public DOMStoreReadTransaction newReadOnlyTransaction() {
-        return new TransactionProxy();
+        return new TransactionProxy(actorContext, TransactionProxy.TransactionType.READ_ONLY,
+            schemaContext);
     }
 
     @Override
     public DOMStoreWriteTransaction newWriteOnlyTransaction() {
-        return new TransactionProxy();
+        return new TransactionProxy(actorContext, TransactionProxy.TransactionType.WRITE_ONLY,
+            schemaContext);
     }
 
     @Override
     public DOMStoreReadWriteTransaction newReadWriteTransaction() {
-        return new TransactionProxy();
+        return new TransactionProxy(actorContext, TransactionProxy.TransactionType.READ_WRITE,
+            schemaContext);
     }
 
     @Override public void onGlobalContextUpdated(SchemaContext schemaContext) {
-        shardManager.tell(new UpdateSchemaContext(schemaContext), null);
+        this.schemaContext = schemaContext;
+        actorContext.getShardManager().tell(
+            new UpdateSchemaContext(schemaContext), null);
+    }
+
+    @Override public void close() throws Exception {
+        actorContext.shutdown();
+
     }
 }