callbackevent.java

sea是一个基于seda模式的实现。这个设计模式将系统分为很多stage。每个stage分布不同的任务（基于线程池）。通过任务流的方式提高系统的效率。

/*
 * Copyright (c) 2003, The Regents of the University of California, through
 * Lawrence Berkeley National Laboratory (subject to receipt of any required
 * approvals from the U.S. Dept. of Energy). All rights reserved.
 */

package gov.lbl.dsd.sea.event;

import gov.lbl.dsd.sea.Stage;

/**
 * An event containing the stage from which the event originates; useful for
 * associating requests/responses, to determine which stage to reply to, or
 * simply for debugging purposes.
 * 
 * @author [e-mail], modified by [e-mail]
 * @author $Author: hoschek3 $
 * @version $Revision: 1.3 $, $Date: 2004/07/27 05:08:08 $
 */

public class CallbackEvent {

    protected Stage source; // the stage that produced and issues this event

    public CallbackEvent(Stage source) {
        this.source = source;
    }

    public Stage getSource() {
        return this.source;
    }

    public String toString() {
        return this.getClass().getName() + ": source=" + getSource();
    }
}