genericcallbackevent.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;

/**
 * A multi-purpose generic event containing an arbitrary object as a message, the
 * stage from which the event originates, as well as an optional arbitrary
 * informational object, either of which may be <code>null</code>.
 * 
 * @author [e-mail], modified by [e-mail]
 * @author $Author: hoschek3 $
 * @version $Revision: 1.4 $, $Date: 2004/07/27 05:08:08 $
 */

public class GenericCallbackEvent extends CallbackEvent {

    protected Object msg; // the message to communicate
    protected Object info; // optional further information such as "write",
    // "read", a URL, etc.

    public GenericCallbackEvent(Stage source, Object msg) {
        this(source, msg, null);
    }

    public GenericCallbackEvent(Stage source, Object msg, Object info) {
        super(source);
        this.msg = msg;
        this.info = info;
    }

    public Object getMessage() {
        return this.msg;
    }

    public Object getInfo() {
        return this.info;
    }

    public String toString() {
        return super.toString() +
                //(getMessage() != null ? ", msg.type=" + getMessage().getClass().getName() : "") +
                ", msg=" + getMessage() +
                (getInfo() != null ? ", info=" + getInfo() : "") +
                (getInfo() instanceof byte[] ? ", info.toString=" + new String((byte[]) this.getInfo()) : "");
    }
}