Spring Framework example source code file (DelegatingExceptionProofRunnable.java)

This example Spring Framework source code file (DelegatingExceptionProofRunnable.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Spring Framework tags/keywords

delegate, delegate, delegatingexceptionproofrunnable, delegatingexceptionproofrunnable, log, runnable, runnable, throwable, unexpected, unexpected

The Spring Framework DelegatingExceptionProofRunnable.java source code

/*
 * Copyright 2002-2007 the original author or authors.
 *
 * Licensed 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.springframework.scheduling.support;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import org.springframework.util.Assert;

/**
 * Runnable wrapper that catches any exception or error thrown
 * from its delegate Runnable. Used for continuing scheduled
 * execution even after an exception thrown from a task's Runnable.
 *
 * @author Juergen Hoeller
 * @since 2.0.5
 */
public class DelegatingExceptionProofRunnable implements Runnable {

	private static final Log logger = LogFactory.getLog(DelegatingExceptionProofRunnable.class);

	private Runnable delegate;


	/**
	 * Create a new DelegatingExceptionProofRunnable.
	 * @param delegate the Runnable implementation to delegate to
	 */
	public DelegatingExceptionProofRunnable(Runnable delegate) {
		Assert.notNull(delegate, "Delegate must not be null");
		this.delegate = delegate;
	}

	public final Runnable getDelegate() {
		return this.delegate;
	}


	public void run() {
		try {
			this.delegate.run();
		}
		catch (Throwable ex) {
			logger.error("Unexpected exception thrown from Runnable", ex);
			// Do not throw the exception, else the main loop of the scheduler might stop!
		}
	}

}