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    }