opendaylight/config/threadpool-config-impl/src/main/java/org/opendaylight/controller/config/threadpool/util/CloseableAsyncEventBus.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.AsyncEventBus;
  12 import com.google.common.eventbus.DeadEvent;
  13 import com.google.common.eventbus.Subscribe;
  14 import java.io.Closeable;
  15 import java.io.IOException;
  16 import org.opendaylight.controller.config.threadpool.ThreadPool;
  17 import org.opendaylight.controller.config.yang.threadpool.impl.AsyncEventBusRuntimeMXBean;
  18 import org.opendaylight.controller.config.yang.threadpool.impl.AsyncEventBusRuntimeRegistration;
  19 import org.opendaylight.controller.config.yang.threadpool.impl.AsyncEventBusRuntimeRegistrator;
  20
  21 /**
  22  * Closeable version of {@link AsyncEventBus}.
  23  */
  24 public class CloseableAsyncEventBus extends AsyncEventBus implements Closeable {
  25     private final ThreadPool threadPool;
  26     private final AsyncEventBusRuntimeRegistration rootRegistration;
  27
  28     public CloseableAsyncEventBus(String identifier, ThreadPool threadPool,
  29             AsyncEventBusRuntimeRegistrator rootRegistrator) {
  30         super(identifier, threadPool.getExecutor());
  31         this.threadPool = threadPool;
  32         rootRegistration = rootRegistrator.register(new AsyncEventBusRuntimeMXBean() {
  33             private long deadEventsCounter = 0;
  34
  35             @Subscribe
  36             public void increaseDeadEvents(DeadEvent deadEvent) {
  37                 deadEventsCounter++;
  38             }
  39
  40             @Override
  41             public Long countDeadEvents() {
  42                 return deadEventsCounter;
  43             }
  44
  45         });
  46     }
  47
  48     public ThreadPool getThreadPool() {
  49         return threadPool;
  50     }
  51
  52     @Override
  53     public void close() throws IOException {
  54         rootRegistration.close();
  55     }
  56
  57 }