001 /** 002 * 003 * Copyright 2004 Hiram Chirino 004 * 005 * Licensed under the Apache License, Version 2.0 (the "License"); 006 * you may not use this file except in compliance with the License. 007 * You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 * 017 **/ 018 package org.activemq.util; 019 020 021 /** 022 * Generates sequence ids used to identify messages in the SQL 023 * tables. 024 * 025 * @version $Revision: 1.1.1.1 $ 026 */ 027 public class LongSequenceGenerator { 028 029 long lastSequenceId=0; 030 031 public synchronized void setLastSequenceId(long value) { 032 this.lastSequenceId=value; 033 } 034 035 public synchronized long getLastSequenceId() { 036 return this.lastSequenceId; 037 } 038 039 public synchronized long getNextSequenceId() { 040 return ++lastSequenceId; 041 } 042 }