1 /**
2 *
3 * Licensed to the Apache Software Foundation (ASF) under one or more
4 * contributor license agreements. See the NOTICE file distributed with
5 * this work for additional information regarding copyright ownership.
6 * The ASF licenses this file to You under the Apache License, Version 2.0
7 * (the "License"); you may not use this file except in compliance with
8 * the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18 package org.apache.geronimo.clustering.wadi;
19
20 import org.apache.geronimo.gbean.GBeanInfo;
21 import org.apache.geronimo.gbean.GBeanInfoBuilder;
22 import org.apache.geronimo.gbean.GBeanLifecycle;
23 import org.apache.geronimo.j2ee.j2eeobjectnames.NameFactory;
24 import org.codehaus.wadi.replication.strategy.BackingStrategy;
25 import org.codehaus.wadi.replication.strategy.BackingStrategyFactory;
26 import org.codehaus.wadi.replication.strategy.RoundRobinBackingStrategyFactory;
27
28 /**
29 *
30 * @version $Rev$ $Date$
31 */
32 public class RoundRobinBackingStrategyFactoryGBean implements BackingStrategyFactory, GBeanLifecycle {
33 private final int nbReplica;
34
35 private BackingStrategyFactory strategyFactory;
36
37 public RoundRobinBackingStrategyFactoryGBean(int nbReplica) {
38 this.nbReplica = nbReplica;
39 }
40
41 public BackingStrategy factory() {
42 return strategyFactory.factory();
43 }
44
45 public void doFail() {
46 strategyFactory = null;
47 }
48
49 public void doStart() throws Exception {
50 strategyFactory = new RoundRobinBackingStrategyFactory(nbReplica);
51 }
52
53 public void doStop() throws Exception {
54 strategyFactory = null;
55 }
56
57
58 public static final GBeanInfo GBEAN_INFO;
59
60 public static final String GBEAN_ATTR_NB_REPLICA = "nbReplica";
61
62 static {
63 GBeanInfoBuilder infoBuilder = GBeanInfoBuilder.createStatic(RoundRobinBackingStrategyFactoryGBean.class,
64 NameFactory.GERONIMO_SERVICE);
65
66 infoBuilder.addAttribute(GBEAN_ATTR_NB_REPLICA, int.class, true);
67
68 infoBuilder.addInterface(BackingStrategyFactory.class);
69
70 infoBuilder.setConstructor(new String[] {GBEAN_ATTR_NB_REPLICA});
71
72 GBEAN_INFO = infoBuilder.getBeanInfo();
73 }
74
75 public static GBeanInfo getGBeanInfo() {
76 return GBEAN_INFO;
77 }
78 }