Use YangInstanceIdentifier.EMPTY

[controller.git] / opendaylight / md-sal / sal-distributed-datastore / src / main / java / org / opendaylight / controller / cluster / datastore / ShardReadTransaction.java

diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/ShardReadTransaction.java b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/ShardReadTransaction.java
index 1328d466f34b6fff82a91b98379cd815b488155c..8ece2593f53f4e191653fa3b93094d6e4cf091cf 100644 (file)
--- a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/ShardReadTransaction.java
+++ b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/ShardReadTransaction.java
@@ -1,66 +1,75 @@
 /*
+ * Copyright (c) 2014 Cisco Systems, Inc. and others.  All rights reserved.
  *
- *  Copyright (c) 2014 Cisco Systems, Inc. and others.  All rights reserved.
- *
- *  This program and the accompanying materials are made available under the
- *  terms of the Eclipse Public License v1.0 which accompanies this distribution,
- *  and is available at http://www.eclipse.org/legal/epl-v10.html
- *
+ * This program and the accompanying materials are made available under the
+ * 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.ActorRef;
 import akka.actor.PoisonPill;
-import akka.event.Logging;
-import akka.event.LoggingAdapter;
-import org.opendaylight.controller.cluster.datastore.messages.CloseTransaction;
-import org.opendaylight.controller.cluster.datastore.messages.CloseTransactionReply;
+import com.google.common.base.Optional;
+import org.opendaylight.controller.cluster.datastore.jmx.mbeans.shard.ShardStats;
+import org.opendaylight.controller.cluster.datastore.messages.CreateSnapshot;
 import org.opendaylight.controller.cluster.datastore.messages.DataExists;
 import org.opendaylight.controller.cluster.datastore.messages.ReadData;
-import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadTransaction;
-import org.opendaylight.controller.sal.core.spi.data.DOMStoreTransactionChain;
-import org.opendaylight.yangtools.yang.model.api.SchemaContext;
+import org.opendaylight.controller.cluster.datastore.utils.SerializationUtils;
+import org.opendaylight.controller.cluster.raft.base.messages.CaptureSnapshotReply;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
+import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
 
 /**
  * @author: syedbahm
  * Date: 8/6/14
  */
 public class ShardReadTransaction extends ShardTransaction {
-  private final DOMStoreReadTransaction transaction;
-  private final LoggingAdapter log =
-      Logging.getLogger(getContext().system(), this);
+    private final AbstractShardDataTreeTransaction<?> transaction;
+
+    public ShardReadTransaction(AbstractShardDataTreeTransaction<?> transaction, ActorRef shardActor,
+            ShardStats shardStats, String transactionID) {
+        super(shardActor, shardStats, transactionID);
+        this.transaction = transaction;
+    }
+
+    @Override
+    public void handleReceive(Object message) throws Exception {
+        if (message instanceof CreateSnapshot) {
+            createSnapshot();
+        } else if(ReadData.isSerializedType(message)) {
+            readData(transaction, ReadData.fromSerializable(message));
+        } else if(DataExists.isSerializedType(message)) {
+            dataExists(transaction, DataExists.fromSerializable(message));
 
-  public ShardReadTransaction(DOMStoreReadTransaction transaction, ActorRef shardActor, SchemaContext schemaContext) {
-    super(shardActor, schemaContext);
-    this.transaction = transaction;
+        } else {
+            super.handleReceive(message);
+        }
+    }
+
+    private void createSnapshot() {
+
+        // This is a special message sent by the shard to send back a serialized snapshot of the whole
+        // data store tree. This transaction was created for that purpose only so we can
+        // self-destruct after sending the reply.
 
-  }
+        final ActorRef sender = getSender();
+        final ActorRef self = getSelf();
+        final Optional<NormalizedNode<?, ?>> result = transaction.getSnapshot().readNode(YangInstanceIdentifier.EMPTY);
 
-  public ShardReadTransaction(DOMStoreTransactionChain transactionChain, DOMStoreReadTransaction transaction, ActorRef shardActor, SchemaContext schemaContext) {
-    super(transactionChain, shardActor, schemaContext);
-    this.transaction = transaction;
-  }
+        byte[] serialized = SerializationUtils.serializeNormalizedNode(result.get());
+        sender.tell(new CaptureSnapshotReply(serialized), self);
 
-  @Override
-  public void handleReceive(Object message) throws Exception {
-    if (ReadData.SERIALIZABLE_CLASS.equals(message.getClass())) {
-        readData(transaction, ReadData.fromSerializable(message));
-    } else if(DataExists.SERIALIZABLE_CLASS.equals(message.getClass())) {
-        dataExists(transaction, DataExists.fromSerializable(message));
-    } else {
-      super.handleReceive(message);
+        self.tell(PoisonPill.getInstance(), self);
     }
-  }
-  protected void closeTransaction(CloseTransaction message) {
-    transaction.close();
-    getSender().tell(new CloseTransactionReply().toSerializable(), getSelf());
-    getSelf().tell(PoisonPill.getInstance(), getSelf());
-  }
 
-  //default scope test method to check if we get correct exception
-  void forUnitTestOnlyExplicitTransactionClose(){
-      transaction.close();
-  }
+    @Override
+    protected AbstractShardDataTreeTransaction<?> getDOMStoreTransaction() {
+        return transaction;
+    }
 
+    @Override
+    protected boolean returnCloseTransactionReply() {
+        return false;
+    }
 }