opendaylight/config/threadpool-config-impl/src/main/java/org/opendaylight/controller/config/threadpool/util/CloseableEventBus.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
   9 package org.opendaylight.controller.config.threadpool.util;
  10
  11 import java.io.Closeable;
  12
  13 import org.opendaylight.controller.config.yang.threadpool.impl.EventBusRuntimeMXBean;
  14 import org.opendaylight.controller.config.yang.threadpool.impl.EventBusRuntimeRegistration;
  15 import org.opendaylight.controller.config.yang.threadpool.impl.EventBusRuntimeRegistrator;
  16
  17 import com.google.common.eventbus.DeadEvent;
  18 import com.google.common.eventbus.EventBus;
  19 import com.google.common.eventbus.Subscribe;
  20
  21 /**
  22  * Closeable {@link EventBus}.
  23  */
  24 public class CloseableEventBus extends EventBus implements Closeable {
  25
  26     private final EventBusRuntimeRegistration rootRegistration;
  27
  28     public CloseableEventBus(String identifier, EventBusRuntimeRegistrator rootRegistrator) {
  29         super(identifier);
  30         rootRegistration = rootRegistrator.register(new EventBusRuntimeMXBean() {
  31             private long deadEventsCounter = 0;
  32
  33             @Subscribe
  34             public void increaseDeadEvents(DeadEvent deadEvent) {
  35                 deadEventsCounter++;
  36             }
  37
  38             @Override
  39             public Long countDeadEvents() {
  40                 return deadEventsCounter;
  41             }
  42         });
  43
  44     }
  45
  46     @Override
  47     public void close() {
  48         rootRegistration.close();
  49
  50     }
  51 }