001    /**
002     * Copyright (c) 2000-2011 Liferay, Inc. All rights reserved.
003     *
004     * The contents of this file are subject to the terms of the Liferay Enterprise
005     * Subscription License ("License"). You may not use this file except in
006     * compliance with the License. You can obtain a copy of the License by
007     * contacting Liferay, Inc. See the License for the specific language governing
008     * permissions and limitations under the License, including but not limited to
009     * distribution rights of the Software.
010     *
011     *
012     *
013     */
014    
015    package com.liferay.portal.osgi;
016    
017    import com.liferay.portal.kernel.log.Log;
018    import com.liferay.portal.kernel.log.LogFactoryUtil;
019    import com.liferay.portal.kernel.util.StringUtil;
020    
021    import org.osgi.framework.Constants;
022    import org.osgi.framework.ServiceEvent;
023    import org.osgi.framework.ServiceReference;
024    
025    /**
026     * @author Raymond Augé
027     */
028    public class ServiceListener
029            extends BaseListener implements org.osgi.framework.ServiceListener {
030    
031            public void serviceChanged(ServiceEvent serviceEvent) {
032                    try {
033                            int type = serviceEvent.getType();
034    
035                            if (type == ServiceEvent.MODIFIED) {
036                                    serviceEventModified(serviceEvent);
037                            }
038                            else if (type == ServiceEvent.REGISTERED) {
039                                    serviceEventRegistered(serviceEvent);
040                            }
041                            else if (type == ServiceEvent.UNREGISTERING) {
042                                    serviceEventUnregistering(serviceEvent);
043                            }
044                    }
045                    catch (Exception e) {
046                            _log.error(e, e);
047                    }
048            }
049    
050            protected String getLogMessage(
051                    String state, ServiceReference<?> serviceReference) {
052    
053                    String message = StringUtil.merge(
054                            (String[])serviceReference.getProperty(Constants.OBJECTCLASS));
055    
056                    return getLogMessage(state, message);
057            }
058    
059            protected void serviceEventModified(ServiceEvent serviceEvent)
060                    throws Exception {
061    
062                    ServiceReference<?> serviceReference =
063                            serviceEvent.getServiceReference();
064    
065                    if (_log.isInfoEnabled()) {
066                            _log.info(getLogMessage("[MODIFIED]", serviceReference));
067                    }
068            }
069    
070            protected void serviceEventRegistered(ServiceEvent serviceEvent)
071                    throws Exception {
072    
073                    ServiceReference<?> serviceReference =
074                            serviceEvent.getServiceReference();
075    
076                    if (_log.isInfoEnabled()) {
077                            _log.info(getLogMessage("[REGISTERED]", serviceReference));
078                    }
079            }
080    
081            protected void serviceEventUnregistering(ServiceEvent serviceEvent)
082                    throws Exception {
083    
084                    ServiceReference<?> serviceReference =
085                            serviceEvent.getServiceReference();
086    
087                    if (_log.isInfoEnabled()) {
088                            _log.info(getLogMessage("[UNREGISTERING]", serviceReference));
089                    }
090            }
091    
092            private static Log _log = LogFactoryUtil.getLog(ServiceListener.class);
093    
094    }