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
  15 import java.io.Closeable;
  16 import java.io.IOException;
  17
  18 import org.opendaylight.controller.config.threadpool.ThreadPool;
  19 import org.opendaylight.controller.config.yang.threadpool.impl.AsyncEventBusRuntimeMXBean;
  20 import org.opendaylight.controller.config.yang.threadpool.impl.AsyncEventBusRuntimeRegistration;
  21 import org.opendaylight.controller.config.yang.threadpool.impl.AsyncEventBusRuntimeRegistrator;
  22
  23 /**
  24  * Closeable version of {@link AsyncEventBus}.
  25  */
  26 public class CloseableAsyncEventBus extends AsyncEventBus implements Closeable {
  27     private final ThreadPool threadPool;
  28     private final AsyncEventBusRuntimeRegistration rootRegistration;
  29
  30     public CloseableAsyncEventBus(String identifier, ThreadPool threadPool,
  31             AsyncEventBusRuntimeRegistrator rootRegistrator) {
  32         super(identifier, threadPool.getExecutor());
  33         this.threadPool = threadPool;
  34         rootRegistration = rootRegistrator.register(new AsyncEventBusRuntimeMXBean() {
  35             private long deadEventsCounter = 0;
  36
  37             @Subscribe
  38             public void increaseDeadEvents(DeadEvent deadEvent) {
  39                 deadEventsCounter++;
  40             }
  41
  42             @Override
  43             public Long countDeadEvents() {
  44                 return deadEventsCounter;
  45             }
  46
  47         });
  48     }
  49
  50     public ThreadPool getThreadPool() {
  51         return threadPool;
  52     }
  53
  54     @Override
  55     public void close() throws IOException {
  56         rootRegistration.close();
  57     }
  58
  59 }