jasenautoupdatenotifier.java

来自「spam source codejasen-0.9jASEN - java An」· Java 代码 · 共 113 行

/*
 * @(#)JasenAutoUpdateNotifier.java	8/01/2005
 *
 * Copyright (c) 2004, 2005  jASEN.org
 * 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.
 *
 *   3. The names of the authors may not be used to endorse or promote products
 *      derived from this software without specific prior written permission.
 *
 *   4. Any modification or additions to the software must be contributed back
 *      to the project.
 *
 *   5. Any investigation or reverse engineering of source code or binary to
 *      enable emails to bypass the filters, and hence inflict spam and or viruses
 *      onto users who use or do not use jASEN could subject the perpetrator to
 *      criminal and or civil liability.
 *
 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED 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 JASEN.ORG,
 * OR ANY CONTRIBUTORS TO THIS SOFTWARE 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.jasen.update;

import org.jasen.JasenScanner;
import org.jasen.error.JasenException;
import org.jasen.thread.ControlledThread;

/**
 * <p>
 * The JasenAutoUpdateNotifier is an asynchronous thread which is responsible for recording event notifications
 * sent from the JasenAutoUpdater.
 * </p>
 * <p>
 * Because the auto updater executes in a synchronous loop, (that is, while it's looping it has exclusive access to itself),
 * any notifications it sends back to the JasenAutoUpdateManager MUST be guaranteed not to block.  There are some specific 
 * circumstances in which blocking notifications are required, however any publicly visible event notifications are considered 
 * asynchronous.
 * </p>
 * @see org.jasen.update.JasenAutoUpdateManager
 * @see org.jasen.update.JasenAutoUpdater
 * @see org.jasen.interfaces.JasenEventListener
 * @author Jason Polites
 */
public class JasenAutoUpdateNotifier extends ControlledThread {

    JasenAutoUpdateManager manager;
    JasenAutoUpdateReport report = null;
    
    /**
     * 
     */
    public JasenAutoUpdateNotifier(JasenAutoUpdateManager manager) {
        super();
        this.manager = manager;
    }


    /**
     * @param name
     */
    public JasenAutoUpdateNotifier(JasenAutoUpdateManager manager, String name) {
        super(name);
        this.manager = manager;
    }

    
    /*
     * (non-Javadoc)
     * @see org.jasen.thread.ControlledThread#handleException(java.lang.Exception)
     */
    public void handleException(Exception e) {
        manager.getErrorHandler().handleException(e);
    }
    
    /*
     * (non-Javadoc)
     * @see org.jasen.thread.ControlledThread#process()
     */
    public void process() throws JasenException {
        if(report != null) {
            
            if(JasenScanner.getInstance().isAlive()) {
                JasenScanner.getInstance().notifyUpdateComplete(report);
            }

            report = null;
        }
    }
    
    public synchronized void notifyUpdateComplete(JasenAutoUpdateReport report) {
        this.report = report;
        notifyAll();
    }
}