BUG 1735 Registering a data change listener should be asynchronous

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

diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/DataChangeListener.java b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/DataChangeListener.java
index cdf04dd093e95676b6ce9d635125abc8aa2b602e..f1c0df4c3ad2a336a6aa8edc7282aa399f160c13 100644 (file)
--- a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/DataChangeListener.java
+++ b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/DataChangeListener.java
@@ -10,6 +10,10 @@ package org.opendaylight.controller.cluster.datastore;
 
 import akka.actor.Props;
 import akka.japi.Creator;
+
+import com.google.common.base.Preconditions;
+import org.opendaylight.controller.cluster.common.actor.AbstractUntypedActor;
+
 import org.opendaylight.controller.cluster.datastore.messages.DataChanged;
 import org.opendaylight.controller.cluster.datastore.messages.DataChangedReply;
 import org.opendaylight.controller.cluster.datastore.messages.EnableNotification;
@@ -17,19 +21,14 @@ import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeEvent;
 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeListener;
 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;
 
 public class DataChangeListener extends AbstractUntypedActor {
     private final AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>> listener;
-    private final SchemaContext schemaContext;
-    private final YangInstanceIdentifier pathId;
-    private boolean notificationsEnabled = false;
-
-    public DataChangeListener(SchemaContext schemaContext,
-                              AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>> listener, YangInstanceIdentifier pathId) {
-        this.listener = listener;
-        this.schemaContext = schemaContext;
-        this.pathId  = pathId;
+    private volatile boolean notificationsEnabled = false;
+
+    public DataChangeListener(AsyncDataChangeListener<YangInstanceIdentifier,
+                                                      NormalizedNode<?, ?>> listener) {
+        this.listener = Preconditions.checkNotNull(listener, "listener should not be null");
     }
 
     @Override public void handleReceive(Object message) throws Exception {
@@ -44,7 +43,7 @@ public class DataChangeListener extends AbstractUntypedActor {
         notificationsEnabled = message.isEnabled();
     }
 
-    public void dataChanged(Object message) {
+    private void dataChanged(Object message) {
 
         // Do nothing if notifications are not enabled
         if(!notificationsEnabled){
@@ -61,14 +60,24 @@ public class DataChangeListener extends AbstractUntypedActor {
         }
     }
 
-    public static Props props(final SchemaContext schemaContext, final AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>> listener, final YangInstanceIdentifier pathId) {
-        return Props.create(new Creator<DataChangeListener>() {
-            @Override
-            public DataChangeListener create() throws Exception {
-                return new DataChangeListener(schemaContext,listener,pathId );
-            }
+    public static Props props(final AsyncDataChangeListener<YangInstanceIdentifier,
+                                                            NormalizedNode<?, ?>> listener) {
+        return Props.create(new DataChangeListenerCreator(listener));
+    }
+
+    private static class DataChangeListenerCreator implements Creator<DataChangeListener> {
+        private static final long serialVersionUID = 1L;
+
+        final AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>> listener;
 
-        });
+        DataChangeListenerCreator(
+                AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>> listener) {
+            this.listener = listener;
+        }
 
+        @Override
+        public DataChangeListener create() throws Exception {
+            return new DataChangeListener(listener);
+        }
     }
 }