org.springframework.scheduling.support.DelegatingExceptionProofRunnable.java Source code

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Here is the source code for org.springframework.scheduling.support.DelegatingExceptionProofRunnable.java

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/*
 * 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!
        }
    }

}