001/* 002 * Copyright 2002-2012 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * https://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package org.springframework.core.task; 018 019import java.io.Serializable; 020 021import org.springframework.util.Assert; 022 023/** 024 * {@link TaskExecutor} implementation that executes each task <i>synchronously</i> 025 * in the calling thread. 026 * 027 * <p>Mainly intended for testing scenarios. 028 * 029 * <p>Execution in the calling thread does have the advantage of participating 030 * in it's thread context, for example the thread context class loader or the 031 * thread's current transaction association. That said, in many cases, 032 * asynchronous execution will be preferable: choose an asynchronous 033 * {@code TaskExecutor} instead for such scenarios. 034 * 035 * @author Juergen Hoeller 036 * @since 2.0 037 * @see SimpleAsyncTaskExecutor 038 */ 039@SuppressWarnings("serial") 040public class SyncTaskExecutor implements TaskExecutor, Serializable { 041 042 /** 043 * Executes the given {@code task} synchronously, through direct 044 * invocation of it's {@link Runnable#run() run()} method. 045 * @throws IllegalArgumentException if the given {@code task} is {@code null} 046 */ 047 @Override 048 public void execute(Runnable task) { 049 Assert.notNull(task, "Runnable must not be null"); 050 task.run(); 051 } 052 053}