Request.java

/*
 *  XCTrack - XContest Live Tracking client for J2ME devices
 *  Copyright (C) 2009 Petr Chromec <petr@xcontest.org>
 *
 *  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 3 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, see <http://www.gnu.org/licenses/>.
 *
 */

package org.xcontest.live.message;

public abstract class Request {
	
	private static int _nextRequestId = 1;
	
	private int _requestId;
	
	protected Request() {
		_requestId = -1;
	}
	
	protected synchronized int getRequestId() {
		if (_requestId < 0) {
			// constructor cannot be synchronized, that is why we allocate requestId here
			_requestId = _nextRequestId;
			_nextRequestId ++;
		}
		return _requestId;
	}
}