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.system.jmx;
018
019 import java.util.ArrayList;
020 import javax.management.MBeanServer;
021 import javax.management.MBeanServerFactory;
022
023 import org.apache.geronimo.gbean.GBeanInfo;
024 import org.apache.geronimo.gbean.GBeanInfoBuilder;
025
026 /**
027 * Creates a real mbean server of finds an existing one with the specified mbeanServerId
028 * @version $Rev: 551483 $ $Date: 2007-06-28 03:29:24 -0400 (Thu, 28 Jun 2007) $
029 */
030 public class RealMBeanServerReference implements MBeanServerReference {
031 private static final String GERONIMO_DEFAULT_DOMAIN = "geronimo";
032
033 private MBeanServer mbeanServer;
034
035 public RealMBeanServerReference(String mbeanServerId) throws MBeanServerNotFound {
036 ArrayList servers = MBeanServerFactory.findMBeanServer(mbeanServerId);
037 if (servers.size() == 0) {
038 mbeanServer = MBeanServerFactory.createMBeanServer(GERONIMO_DEFAULT_DOMAIN);
039 } else if (servers.size() > 1) {
040 throw new MBeanServerNotFound(servers.size() + " MBeanServers were found with the agent id " + mbeanServerId);
041 } else {
042 mbeanServer = (MBeanServer) servers.get(0);
043 }
044 }
045
046 /**
047 * Finds an existing MBeanServer with default domain GERONIMO_DEFAULT_DOMAIN
048 * or creates a new one if there isn't any.
049 */
050 public RealMBeanServerReference() {
051 // Find all MBeanServers
052 ArrayList<MBeanServer> servers = MBeanServerFactory.findMBeanServer(null);
053 for(MBeanServer server: servers) {
054 // Look for one with default domain GERONIMO_DEFAULT_DOMAIN
055 if (GERONIMO_DEFAULT_DOMAIN.equals(server.getDefaultDomain())) {
056 mbeanServer = server;
057 break;
058 }
059 }
060 if(mbeanServer == null) {
061 // No MBeanServer with default domain GERONIMO_DEFAULT_DOMAIN exists. Create one.
062 mbeanServer = MBeanServerFactory.createMBeanServer(GERONIMO_DEFAULT_DOMAIN);
063 }
064 }
065
066 public MBeanServer getMBeanServer() {
067 return mbeanServer;
068 }
069
070 public static final GBeanInfo GBEAN_INFO;
071
072 static {
073 GBeanInfoBuilder infoFactory = GBeanInfoBuilder.createStatic(RealMBeanServerReference.class);
074 infoFactory.addAttribute("mbeanServerId", String.class, true);
075 //infoFactory.setConstructor(new String[]{"mbeanServerId"});
076 GBEAN_INFO = infoFactory.getBeanInfo();
077 }
078
079 public static GBeanInfo getGBeanInfo() {
080 return GBEAN_INFO;
081 }
082 }