001 // Copyright 2005 The Apache Software Foundation 002 // 003 // Licensed under the Apache License, Version 2.0 (the "License"); 004 // you may not use this file except in compliance with the License. 005 // You may obtain a copy of the License at 006 // 007 // http://www.apache.org/licenses/LICENSE-2.0 008 // 009 // Unless required by applicable law or agreed to in writing, software 010 // distributed under the License is distributed on an "AS IS" BASIS, 011 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 012 // See the License for the specific language governing permissions and 013 // limitations under the License. 014 015 package org.apache.hivemind.management.impl; 016 017 import java.util.List; 018 019 import javax.management.MBeanServer; 020 021 import org.apache.hivemind.ServiceImplementationFactory; 022 import org.apache.hivemind.ServiceImplementationFactoryParameters; 023 024 /** 025 * An implementation of {@link org.apache.hivemind.ServiceImplementationFactory} that creates a 026 * MBeanServer using {@link javax.management.MBeanServerFactory}. Searches for an existing 027 * MBeanServer first, and creates a new one if none has been found 028 * 029 * @author Achim Huegen 030 * @since 1.1 031 */ 032 public class MBeanServerFactory implements ServiceImplementationFactory 033 { 034 035 public Object createCoreServiceImplementation( 036 ServiceImplementationFactoryParameters factoryParameters) 037 { 038 String serverId = null; 039 MBeanServer server = null; 040 List servers = javax.management.MBeanServerFactory.findMBeanServer(serverId); 041 if (servers != null && servers.size() > 0) 042 server = (MBeanServer) servers.get(0); 043 else 044 server = javax.management.MBeanServerFactory.createMBeanServer(); 045 046 return server; 047 } 048 049 }