org.springframework.scheduling.timer.DelegatingTimerTask.java Source code

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Here is the source code for org.springframework.scheduling.timer.DelegatingTimerTask.java

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/*
 * Copyright 2002-2012 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.timer;

import java.util.TimerTask;

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

import org.springframework.util.Assert;

/**
 * Simple {@link java.util.TimerTask} adapter that delegates to a
 * given {@link Runnable}.
 *
 * <p>This is often preferable to deriving from TimerTask, to be able to
 * implement an interface rather than extend an abstract base class.
 *
 * @author Juergen Hoeller
 * @since 1.2.4
 * @deprecated as of Spring 3.0, in favor of the {@code scheduling.concurrent}
 * package which is based on Java 5's {@code java.util.concurrent.ExecutorService}
 */
@Deprecated
public class DelegatingTimerTask extends TimerTask {

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

    private final Runnable delegate;

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

    /**
     * Return the wrapped Runnable implementation.
     */
    public final Runnable getDelegate() {
        return this.delegate;
    }

    /**
     * Delegates execution to the underlying Runnable, catching any exception
     * or error thrown in order to continue scheduled execution.
     */
    @Override
    public void run() {
        try {
            this.delegate.run();
        } catch (Throwable ex) {
            logger.error("Unexpected exception thrown from Runnable: " + this.delegate, ex);
            // Do not throw the exception, else the main loop of the Timer might stop!
        }
    }

}