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 29f22b28f42f9f05741ac0f2f60601a717d10249..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
@@ -1,50 +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 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.DOMStoreTransaction;
-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 AbstractShardDataTreeTransaction<?> transaction;
 
-    public ShardReadTransaction(DOMStoreReadTransaction transaction, ActorRef shardActor,
-            SchemaContext schemaContext, ShardStats shardStats, String transactionID) {
-        super(shardActor, schemaContext, shardStats, transactionID);
+    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(ReadData.SERIALIZABLE_CLASS.equals(message.getClass())) {
+        if (message instanceof CreateSnapshot) {
+            createSnapshot();
+        } else if(ReadData.isSerializedType(message)) {
             readData(transaction, ReadData.fromSerializable(message));
-        } else if(DataExists.SERIALIZABLE_CLASS.equals(message.getClass())) {
+        } else if(DataExists.isSerializedType(message)) {
             dataExists(transaction, DataExists.fromSerializable(message));
+
         } 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);
+
+        byte[] serialized = SerializationUtils.serializeNormalizedNode(result.get());
+        sender.tell(new CaptureSnapshotReply(serialized), self);
+
+        self.tell(PoisonPill.getInstance(), self);
+    }
+
     @Override
-    protected DOMStoreTransaction getDOMStoreTransaction() {
+    protected AbstractShardDataTreeTransaction<?> getDOMStoreTransaction() {
         return transaction;
     }
+
+    @Override
+    protected boolean returnCloseTransactionReply() {
+        return false;
+    }
 }