BUG-2673: make CDS implement DOMDataTreeChangeListener

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

diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/DataTreeChangeListenerRegistrationActor.java b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/DataTreeChangeListenerRegistrationActor.java
new file mode 100644 (file)
index 0000000..7d0117f
--- /dev/null
+++ b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/DataTreeChangeListenerRegistrationActor.java
@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2015 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
+ */
+package org.opendaylight.controller.cluster.datastore;
+
+import akka.actor.PoisonPill;
+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.CloseDataTreeChangeListenerRegistration;
+import org.opendaylight.controller.cluster.datastore.messages.CloseDataTreeChangeListenerRegistrationReply;
+import org.opendaylight.controller.md.sal.dom.api.DOMDataTreeChangeListener;
+import org.opendaylight.yangtools.concepts.ListenerRegistration;
+
+/**
+ * Actor co-located with a shard. It exists only to terminate the registration when
+ * asked to do so via {@link CloseDataTreeChangeListenerRegistration}.
+ */
+public final class DataTreeChangeListenerRegistrationActor extends AbstractUntypedActor {
+    private final ListenerRegistration<DOMDataTreeChangeListener> registration;
+
+    public DataTreeChangeListenerRegistrationActor(final ListenerRegistration<DOMDataTreeChangeListener> registration) {
+        this.registration = Preconditions.checkNotNull(registration);
+    }
+
+    @Override
+    protected void handleReceive(Object message) throws Exception {
+        if (message instanceof CloseDataTreeChangeListenerRegistration) {
+            registration.close();
+            getSender().tell(CloseDataTreeChangeListenerRegistrationReply.getInstance(), getSelf());
+            getSelf().tell(PoisonPill.getInstance(), getSelf());
+        }
+    }
+
+    public static Props props(final ListenerRegistration<DOMDataTreeChangeListener> registration) {
+        return Props.create(new DataTreeChangeListenerRegistrationCreator(registration));
+    }
+
+    private static final class DataTreeChangeListenerRegistrationCreator implements Creator<DataTreeChangeListenerRegistrationActor> {
+        private static final long serialVersionUID = 1L;
+        final ListenerRegistration<DOMDataTreeChangeListener> registration;
+
+        DataTreeChangeListenerRegistrationCreator(ListenerRegistration<DOMDataTreeChangeListener> registration) {
+            this.registration = Preconditions.checkNotNull(registration);
+        }
+
+        @Override
+        public DataTreeChangeListenerRegistrationActor create() {
+            return new DataTreeChangeListenerRegistrationActor(registration);
+        }
+    }
+}