| /** |
| * 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.util.concurrent; |
| |
| import java.util.List; |
| import java.util.concurrent.AbstractExecutorService; |
| import java.util.concurrent.TimeUnit; |
| |
| /** |
| * A synchronous {@link java.util.concurrent.ExecutorService} which always invokes |
| * the task in the caller thread (just a thread pool facade). |
| * <p/> |
| * There is no task queue, and no thread pool. The task will thus always be executed |
| * by the caller thread in a fully synchronous method invocation. |
| * <p/> |
| * This implementation is very simple and does not support waiting for tasks to complete during shutdown. |
| * |
| * @version |
| */ |
| public class SynchronousExecutorService extends AbstractExecutorService { |
| |
| private volatile boolean shutdown; |
| |
| public void shutdown() { |
| shutdown = true; |
| } |
| |
| public List<Runnable> shutdownNow() { |
| // not implemented |
| return null; |
| } |
| |
| public boolean isShutdown() { |
| return shutdown; |
| } |
| |
| public boolean isTerminated() { |
| return shutdown; |
| } |
| |
| public boolean awaitTermination(long time, TimeUnit unit) throws InterruptedException { |
| // not implemented |
| return true; |
| } |
| |
| public void execute(Runnable runnable) { |
| // run the task synchronously |
| runnable.run(); |
| } |
| |
| } |