joblistener.java

定时器开源项目, 相对于 jcrontab, Quartz 算是更完整的一个项目, 随著开发的版本上来, 他已经脱离只是写在程序里面的计时器, 在指定的时间或区间, 处理所指定的事件. 也加入了 se

/*
 * Copyright James House (c) 2001-2004
 * 
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met: 1.
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer. 2. Redistributions in
 * binary form must reproduce the above copyright notice, this list of
 * conditions and the following disclaimer in the documentation and/or other
 * materials provided with the distribution.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *  
 */
package org.quartz;

/**
 * <p>
 * The interface to be implemented by classes that want to be informed when a
 * <code>{@link org.quartz.JobDetail}</code> executes. In general,
 * applications that use a <code>Scheduler</code> will not have use for this
 * mechanism.
 * </p>
 * 
 * @see Scheduler
 * @see Job
 * @see JobExecutionContext
 * @see JobExecutionException
 * @see TriggerListener
 * 
 * @author James House
 */
public interface JobListener {

    /*
     * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     * 
     * Interface.
     * 
     * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     */

    /**
     * <p>
     * Get the name of the <code>JobListener</code>.
     * </p>
     */
    public String getName();

    /**
     * <p>
     * Called by the <code>{@link Scheduler}</code> when a <code>{@link org.quartz.JobDetail}</code>
     * is about to be executed (an associated <code>{@link Trigger}</code>
     * has occured).
     * </p>
     * 
     * <p>
     * This method will not be invoked if the execution of the Job was vetoed
     * by a <code>{@link TriggerListener}</code>.
     * </p>
     * 
     * @see #jobExecutionVetoed(JobExecutionContext)
     */
    public void jobToBeExecuted(JobExecutionContext context);

    /**
     * <p>
     * Called by the <code>{@link Scheduler}</code> when a <code>{@link org.quartz.JobDetail}</code>
     * was about to be executed (an associated <code>{@link Trigger}</code>
     * has occured), but a <code>{@link TriggerListener}</code> vetoed it's 
     * execution.
     * </p>
     * 
     * @see #jobToBeExecuted(JobExecutionContext)
     */
    public void jobExecutionVetoed(JobExecutionContext context);

    
    /**
     * <p>
     * Called by the <code>{@link Scheduler}</code> after a <code>{@link org.quartz.JobDetail}</code>
     * has been executed, and be for the associated <code>Trigger</code>'s
     * <code>triggered(xx)</code> method has been called.
     * </p>
     */
    public void jobWasExecuted(JobExecutionContext context,
            JobExecutionException jobException);

}