opendaylight/md-sal/sal-binding-broker/src/main/java/org/opendaylight/controller/sal/binding/impl/GeneratedListenerRegistration.java

   1 /**
   2  * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.controller.sal.binding.impl;
   9
  10 import org.opendaylight.controller.sal.binding.spi.NotificationInvokerFactory.NotificationInvoker;
  11 import org.opendaylight.yangtools.concepts.AbstractObjectRegistration;
  12 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  13 import org.opendaylight.yangtools.yang.binding.NotificationListener;
  14
  15 import com.google.common.base.Preconditions;
  16
  17 class GeneratedListenerRegistration extends AbstractObjectRegistration<NotificationListener> implements ListenerRegistration<NotificationListener> {
  18     private NotificationBrokerImpl notificationBroker;
  19     private final NotificationInvoker invoker;
  20
  21     public GeneratedListenerRegistration(final NotificationListener instance, final NotificationInvoker invoker, final NotificationBrokerImpl broker) {
  22         super(instance);
  23         this.invoker = Preconditions.checkNotNull(invoker);
  24         this.notificationBroker = Preconditions.checkNotNull(broker);
  25     }
  26
  27     public NotificationInvoker getInvoker() {
  28         // There is a race with NotificationBrokerImpl:
  29         // the invoker can be closed here
  30         return invoker;
  31     }
  32
  33     @Override
  34     protected void removeRegistration() {
  35         notificationBroker.unregisterListener(this);
  36         notificationBroker = null;
  37         invoker.close();
  38     }
  39 }