com.saysth.commons.quartz.SimpleThreadPoolTaskExecutor.java Source code

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Here is the source code for com.saysth.commons.quartz.SimpleThreadPoolTaskExecutor.java

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/*
 * Copyright 2002-2009 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 com.saysth.commons.quartz;

import java.util.concurrent.Callable;
import java.util.concurrent.Future;
import java.util.concurrent.FutureTask;

import org.quartz.SchedulerConfigException;
import org.quartz.simpl.SimpleThreadPool;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.scheduling.SchedulingException;
import org.springframework.scheduling.SchedulingTaskExecutor;
import org.springframework.util.Assert;

/**
 * Subclass of Quartz's SimpleThreadPool that implements Spring's
 * {@link org.springframework.core.task.TaskExecutor} interface and listens to
 * Spring lifecycle callbacks.
 * 
 * <p>
 * Can be shared between a Quartz Scheduler (specified as "taskExecutor") and
 * other TaskExecutor users, or even used completely independent of a Quartz
 * Scheduler (as plain TaskExecutor backend).
 * 
 * @author Juergen Hoeller
 * @since 2.0
 * @see org.quartz.simpl.SimpleThreadPool
 * @see org.springframework.core.task.TaskExecutor
 * @see SchedulerFactoryBean#setTaskExecutor
 */
public class SimpleThreadPoolTaskExecutor extends SimpleThreadPool
        implements SchedulingTaskExecutor, InitializingBean, DisposableBean {

    private boolean waitForJobsToCompleteOnShutdown = false;

    /**
     * Set whether to wait for running jobs to complete on shutdown. Default is
     * "false".
     * 
     * @see org.quartz.simpl.SimpleThreadPool#shutdown(boolean)
     */
    public void setWaitForJobsToCompleteOnShutdown(boolean waitForJobsToCompleteOnShutdown) {
        this.waitForJobsToCompleteOnShutdown = waitForJobsToCompleteOnShutdown;
    }

    public void afterPropertiesSet() throws SchedulerConfigException {
        initialize();
    }

    public void execute(Runnable task) {
        Assert.notNull(task, "Runnable must not be null");
        if (!runInThread(task)) {
            throw new SchedulingException("Quartz SimpleThreadPool already shut down");
        }
    }

    public void execute(Runnable task, long startTimeout) {
        execute(task);
    }

    public Future<?> submit(Runnable task) {
        FutureTask<Object> future = new FutureTask<Object>(task, null);
        execute(future);
        return future;
    }

    public <T> Future<T> submit(Callable<T> task) {
        FutureTask<T> future = new FutureTask<T>(task);
        execute(future);
        return future;
    }

    /**
     * This task executor prefers short-lived work units.
     */
    public boolean prefersShortLivedTasks() {
        return true;
    }

    public void destroy() {
        shutdown(this.waitForJobsToCompleteOnShutdown);
    }

}