responsehash.java

是一个HTTP BINDING FOR JABBER

/*
 * Copyright (C) 2005 Stefan Strigler <[e-mail]>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
package org.jabber.JabberHTTPBind;

import java.util.Hashtable;

/**
 * a <list> of Response objects
 * thus enabling us to handle concurrent requests
 * 
 * @author Stefan Strigler <[e-mail]> 
 */
public class ResponseHash extends Hashtable {
	public class JHBRidInvalidException extends Exception {
		public JHBRidInvalidException() {
			super();
		}
	}
	
	private int windowSize; 

	/**
	 * @param windowSize
	 */
	public ResponseHash(int windowSize) {
		super(windowSize);
		this.windowSize = windowSize;
	}
	
	/**
	 * determines how many requests we are processing at the moment by counting 
	 * responses that arent closed yet.
	 * 
	 * @return number of unsent responses
	 */
	public int pendingResponses() {
		return 0;
	}
	
	public boolean isValidRid(long rid) {
		boolean valid = false;
		
		return valid;
	}
	/**
	 * Checks whether rid is valid after all (within valid window). Throws an
	 * exception if not. If rid matches a closed response this one's returned.
	 * 
	 * @param rid
	 *            A request ID as passed along from incoming client request
	 * 
	 * @return A closed or a new Response depending on rid
	 * 
	 * @throws JHBRidInvalidException
	 *             Thrown if rid is not within valid window.
	 */
	public synchronized Response getResponse(long rid)
			throws JHBRidInvalidException {
		Response resp = (Response) get(new Long(rid));

		if (resp != null && resp.getStatus() == Response.STATUS_DONE) {
			return resp;
		} 
		
		
		return resp;
	}
	
	public synchronized Response addResponse(Response resp, String rid) {
		this.put(rid,resp);
		return resp;
	}

}