schedulerlistener.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 of major
 * <code>{@link Scheduler}</code> events.
 * </p>
 * 
 * @see Scheduler
 * @see JobListener
 * @see TriggerListener
 * 
 * @author James House
 */
public interface SchedulerListener {

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

    /**
     * <p>
     * Called by the <code>{@link Scheduler}</code> when a <code>{@link org.quartz.JobDetail}</code>
     * is scheduled.
     * </p>
     */
    public void jobScheduled(Trigger trigger);

    /**
     * <p>
     * Called by the <code>{@link Scheduler}</code> when a <code>{@link org.quartz.JobDetail}</code>
     * is unscheduled.
     * </p>
     */
    public void jobUnscheduled(String triggerName, String triggerGroup);

    /**
     * <p>
     * Called by the <code>{@link Scheduler}</code> when a <code>{@link Trigger}</code>
     * has reached the condition in which it will never fire again.
     * </p>
     */
    public void triggerFinalized(Trigger trigger);

    /**
     * <p>
     * Called by the <code>{@link Scheduler}</code> when a <code>{@link Trigger}</code>
     * or group of <code>{@link Trigger}s</code> has been paused.
     * </p>
     * 
     * <p>
     * If a group was paused, then the <code>triggerName</code> parameter
     * will be null.
     * </p>
     */
    public void triggersPaused(String triggerName, String triggerGroup);

    /**
     * <p>
     * Called by the <code>{@link Scheduler}</code> when a <code>{@link Trigger}</code>
     * or group of <code>{@link Trigger}s</code> has been un-paused.
     * </p>
     * 
     * <p>
     * If a group was resumed, then the <code>triggerName</code> parameter
     * will be null.
     * </p>
     */
    public void triggersResumed(String triggerName, String triggerGroup);

    /**
     * <p>
     * Called by the <code>{@link Scheduler}</code> when a <code>{@link org.quartz.JobDetail}</code>
     * or group of <code>{@link org.quartz.JobDetail}s</code> has been
     * paused.
     * </p>
     * 
     * <p>
     * If a group was paused, then the <code>jobName</code> parameter will be
     * null. If all jobs were paused, then both parameters will be null.
     * </p>
     */
    public void jobsPaused(String jobName, String jobGroup);

    /**
     * <p>
     * Called by the <code>{@link Scheduler}</code> when a <code>{@link org.quartz.JobDetail}</code>
     * or group of <code>{@link org.quartz.JobDetail}s</code> has been
     * un-paused.
     * </p>
     * 
     * <p>
     * If a group was resumed, then the <code>jobName</code> parameter will
     * be null. If all jobs were paused, then both parameters will be null.
     * </p>
     */
    public void jobsResumed(String jobName, String jobGroup);

    /**
     * <p>
     * Called by the <code>{@link Scheduler}</code> when a serious error has
     * occured within the scheduler - such as repeated failures in the <code>JobStore</code>,
     * or the inability to instantiate a <code>Job</code> instance when its
     * <code>Trigger</code> has fired.
     * </p>
     * 
     * <p>
     * The <code>getErrorCode()</code> method of the given SchedulerException
     * can be used to determine more specific information about the type of
     * error that was encountered.
     * </p>
     */
    public void schedulerError(String msg, SchedulerException cause);

    /**
     * <p>
     * Called by the <code>{@link Scheduler}</code> to inform the listener
     * that it has shutdown.
     * </p>
     */
    public void schedulerShutdown();

}