1 /***
2 *
3 * Copyright 2004 Hiram Chirino
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 **/
18 package org.codehaus.activemq.store.jdbc;
19
20
21 /***
22 * Generates sequence ids used to identify messages in the SQL
23 * tables.
24 *
25 * @version $Revision: 1.2 $
26 */
27 public class SequenceGenerator {
28
29 long lastSequenceId=0;
30
31 public synchronized void setLastSequenceId(long value) {
32 this.lastSequenceId=value;
33 }
34
35 public synchronized long getLastSequenceId() {
36 return this.lastSequenceId;
37 }
38
39 public synchronized long getNextSequenceId() {
40 return lastSequenceId++;
41 }
42 }