001    /******************************************************************************
002     * Copyright (C) MActor Developers. All rights reserved.                        *
003     * ---------------------------------------------------------------------------*
004     * This file is part of MActor.                                               *
005     *                                                                            *
006     * MActor is free software; you can redistribute it and/or modify             *
007     * it under the terms of the GNU General Public License as published by       *
008     * the Free Software Foundation; either version 2 of the License, or          *
009     * (at your option) any later version.                                        *
010     *                                                                            *
011     * MActor is distributed in the hope that it will be useful,                  *
012     * but WITHOUT ANY WARRANTY; without even the implied warranty of             *
013     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the              *
014     * GNU General Public License for more details.                               *
015     *                                                                            *
016     * You should have received a copy of the GNU General Public License          *
017     * along with MActor; if not, write to the Free Software                      *
018     * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA *
019     ******************************************************************************/
020    package org.mactor.framework;
021    
022    public class AppUtil {
023            private static String app_instance_id = System.currentTimeMillis() + "";
024            public static final String getAppInstanceId() {
025                    return app_instance_id;
026            }
027            private static Object id_lock = new Object();
028            private static long counter = 0;
029            private static long getNextId() {
030                    synchronized (id_lock) {
031                            return counter++;
032                    }
033            }
034            public static String getNextId(String prefix) {
035                    return prefix + "_" + app_instance_id + "_" + getNextId();
036            }
037    }