01: /*
02: * Copyright 2002-2006 the original author or authors.
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License");
05: * you may not use this file except in compliance with the License.
06: * You may obtain a copy of the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
10: * Unless required by applicable law or agreed to in writing, software
11: * distributed under the License is distributed on an "AS IS" BASIS,
12: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13: * See the License for the specific language governing permissions and
14: * limitations under the License.
15: */
16:
17: package org.springframework.core.task;
18:
19: import org.springframework.util.Assert;
20:
21: import java.io.Serializable;
22:
23: /**
24: * <code>TaskExecutor</code> implementation that executes each task
25: * <i>synchronously</i> in the calling thread.
26: *
27: * <p>Mainly intended for testing scenarios.
28: *
29: * <p>Execution in the calling thread does have the advantage of participating
30: * in it's thread context, for example the thread context class loader or the
31: * thread's current transaction association. That said, in many cases,
32: * asynchronous execution will be preferable: choose an asynchronous
33: * <code>TaskExecutor</code> instead for such scenarios.
34: *
35: * @author Juergen Hoeller
36: * @see SimpleAsyncTaskExecutor
37: * @see org.springframework.scheduling.timer.TimerTaskExecutor
38: * @since 2.0
39: */
40: public class SyncTaskExecutor implements TaskExecutor, Serializable {
41:
42: /**
43: * Executes the given <code>task</code> synchronously, through direct
44: * invocation of it's {@link Runnable#run() run()} method.
45: * @throws IllegalArgumentException if the given <code>task</code> is <code>null</code>
46: */
47: public void execute(Runnable task) {
48: Assert.notNull(task, "Runnable must not be null");
49: task.run();
50: }
51:
52: }
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