| /** |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.camel.component.disruptor; |
| |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.TimeUnit; |
| |
| /** |
| * This abstract base class is used to implement the {@link LifecycleAwareExchangeEventHandler} interface with added |
| * support to await starting/stopping by the Disruptor framework. |
| */ |
| abstract class AbstractLifecycleAwareExchangeEventHandler implements LifecycleAwareExchangeEventHandler { |
| |
| private volatile boolean started; |
| private volatile CountDownLatch startedLatch = new CountDownLatch(1); |
| private volatile CountDownLatch stoppedLatch = new CountDownLatch(1); |
| |
| @Override |
| public abstract void onEvent(final ExchangeEvent event, long sequence, boolean endOfBatch) |
| throws Exception; |
| |
| @Override |
| public void awaitStarted() throws InterruptedException { |
| if (!started) { |
| startedLatch.await(); |
| } |
| } |
| |
| @Override |
| public boolean awaitStarted(final long timeout, final TimeUnit unit) throws InterruptedException { |
| return started || startedLatch.await(timeout, unit); |
| } |
| |
| @Override |
| public void awaitStopped() throws InterruptedException { |
| if (started) { |
| stoppedLatch.await(); |
| } |
| } |
| |
| @Override |
| public boolean awaitStopped(final long timeout, final TimeUnit unit) throws InterruptedException { |
| return !started || stoppedLatch.await(timeout, unit); |
| } |
| |
| @Override |
| public void onStart() { |
| stoppedLatch = new CountDownLatch(1); |
| startedLatch.countDown(); |
| started = true; |
| } |
| |
| @Override |
| public void onShutdown() { |
| startedLatch = new CountDownLatch(1); |
| stoppedLatch.countDown(); |
| started = false; |
| } |
| } |