001    /**
002     * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portal.kernel.cluster;
016    
017    import com.liferay.registry.Registry;
018    import com.liferay.registry.RegistryUtil;
019    import com.liferay.registry.ServiceReference;
020    import com.liferay.registry.ServiceTracker;
021    import com.liferay.registry.ServiceTrackerCustomizer;
022    
023    import java.util.Map;
024    import java.util.concurrent.ConcurrentHashMap;
025    
026    /**
027     * @author Tina Tian
028     */
029    public class ClusterInvokeAcceptorUtil {
030    
031            public static ClusterInvokeAcceptor getClusterInvokeAcceptor(
032                    String clusterInvokeAcceptorName) {
033    
034                    return _clusterInvokeAcceptors.get(clusterInvokeAcceptorName);
035            }
036    
037            private ClusterInvokeAcceptorUtil() {
038            }
039    
040            private static final Map<String, ClusterInvokeAcceptor>
041                    _clusterInvokeAcceptors = new ConcurrentHashMap<>();
042            private static final ServiceTracker
043                    <ClusterInvokeAcceptor, ClusterInvokeAcceptor> _serviceTracker;
044    
045            static {
046                    Registry registry = RegistryUtil.getRegistry();
047    
048                    _serviceTracker = registry.trackServices(
049                            ClusterInvokeAcceptor.class,
050                            new ClusterInvokeAcceptorServiceTrackerCustomizer());
051    
052                    _serviceTracker.open();
053            }
054    
055            private static class ClusterInvokeAcceptorServiceTrackerCustomizer
056                    implements
057                            ServiceTrackerCustomizer
058                                    <ClusterInvokeAcceptor, ClusterInvokeAcceptor> {
059    
060                    @Override
061                    public ClusterInvokeAcceptor addingService(
062                            ServiceReference<ClusterInvokeAcceptor> serviceReference) {
063    
064                            Registry registry = RegistryUtil.getRegistry();
065    
066                            ClusterInvokeAcceptor clusterInvokeAcceptor = registry.getService(
067                                    serviceReference);
068    
069                            Class<?> clazz = clusterInvokeAcceptor.getClass();
070    
071                            _clusterInvokeAcceptors.put(clazz.getName(), clusterInvokeAcceptor);
072    
073                            return clusterInvokeAcceptor;
074                    }
075    
076                    @Override
077                    public void modifiedService(
078                            ServiceReference<ClusterInvokeAcceptor> serviceReference,
079                            ClusterInvokeAcceptor clusterInvokeAcceptor) {
080    
081                            Class<?> clazz = clusterInvokeAcceptor.getClass();
082    
083                            _clusterInvokeAcceptors.put(clazz.getName(), clusterInvokeAcceptor);
084                    }
085    
086                    @Override
087                    public void removedService(
088                            ServiceReference<ClusterInvokeAcceptor> serviceReference,
089                            ClusterInvokeAcceptor clusterInvokeAcceptor) {
090    
091                            Registry registry = RegistryUtil.getRegistry();
092    
093                            registry.ungetService(serviceReference);
094    
095                            Class<?> clazz = clusterInvokeAcceptor.getClass();
096    
097                            _clusterInvokeAcceptors.remove(clazz.getName());
098                    }
099    
100            }
101    
102    }