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