001 /**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements. See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License. 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 package org.apache.geronimo.clustering.wadi;
018
019 import org.apache.geronimo.gbean.GBeanInfo;
020 import org.apache.geronimo.gbean.GBeanInfoBuilder;
021 import org.apache.geronimo.gbean.GBeanLifecycle;
022 import org.apache.geronimo.j2ee.j2eeobjectnames.NameFactory;
023 import org.codehaus.wadi.replication.strategy.BackingStrategy;
024 import org.codehaus.wadi.replication.strategy.BackingStrategyFactory;
025 import org.codehaus.wadi.replication.strategy.RoundRobinBackingStrategyFactory;
026 import org.codehaus.wadi.servicespace.ServiceSpace;
027
028 /**
029 *
030 * @version $Rev: 706640 $ $Date: 2008-10-21 14:44:05 +0000 (Tue, 21 Oct 2008) $
031 */
032 public class RoundRobinBackingStrategyFactoryGBean implements BackingStrategyFactory, GBeanLifecycle {
033 private final int nbReplica;
034
035 private BackingStrategyFactory strategyFactory;
036 private ServiceSpace serviceSpace;
037
038 public RoundRobinBackingStrategyFactoryGBean(int nbReplica) {
039 this.nbReplica = nbReplica;
040 }
041
042 public BackingStrategy factory() {
043 return strategyFactory.factory();
044 }
045
046 public void setServiceSpace(ServiceSpace serviceSpace) {
047 strategyFactory.setServiceSpace(serviceSpace);
048 }
049
050 public void doFail() {
051 strategyFactory = null;
052 }
053
054 public void doStart() throws Exception {
055 strategyFactory = new RoundRobinBackingStrategyFactory(nbReplica);
056 }
057
058 public void doStop() throws Exception {
059 strategyFactory = null;
060 }
061
062
063 public static final GBeanInfo GBEAN_INFO;
064
065 public static final String GBEAN_ATTR_NB_REPLICA = "nbReplica";
066
067 static {
068 GBeanInfoBuilder infoBuilder = GBeanInfoBuilder.createStatic(RoundRobinBackingStrategyFactoryGBean.class,
069 NameFactory.GERONIMO_SERVICE);
070
071 infoBuilder.addAttribute(GBEAN_ATTR_NB_REPLICA, int.class, true);
072
073 infoBuilder.addInterface(BackingStrategyFactory.class);
074
075 infoBuilder.setConstructor(new String[] {GBEAN_ATTR_NB_REPLICA});
076
077 GBEAN_INFO = infoBuilder.getBeanInfo();
078 }
079
080 public static GBeanInfo getGBeanInfo() {
081 return GBEAN_INFO;
082 }
083 }