001    /**
002     * Copyright (c) 2000-2012 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.module.framework;
016    
017    import com.liferay.portal.kernel.log.Log;
018    import com.liferay.portal.kernel.log.LogFactoryUtil;
019    import com.liferay.portal.kernel.util.StringPool;
020    import com.liferay.portal.kernel.util.StringUtil;
021    
022    import org.osgi.framework.Bundle;
023    import org.osgi.framework.BundleActivator;
024    import org.osgi.framework.BundleContext;
025    import org.osgi.framework.ServiceReference;
026    import org.osgi.service.log.LogEntry;
027    import org.osgi.service.log.LogListener;
028    import org.osgi.service.log.LogReaderService;
029    import org.osgi.service.log.LogService;
030    import org.osgi.util.tracker.ServiceTracker;
031    import org.osgi.util.tracker.ServiceTrackerCustomizer;
032    
033    /**
034     * @author Raymond Augé
035     */
036    public class LogBridge
037            implements BundleActivator, LogListener,
038                               ServiceTrackerCustomizer<LogReaderService, LogReaderService> {
039    
040            public LogReaderService addingService(
041                    ServiceReference<LogReaderService> serviceReference) {
042    
043                    LogReaderService logReaderService = _bundleContext.getService(
044                            serviceReference);
045    
046                    logReaderService.addLogListener(this);
047    
048                    return logReaderService;
049            }
050    
051            public void logged(LogEntry logEntry) {
052                    int level = logEntry.getLevel();
053    
054                    Bundle bundle = logEntry.getBundle();
055    
056                    String symbolicName = StringUtil.replace(
057                            bundle.getSymbolicName(), StringPool.PERIOD, StringPool.UNDERLINE);
058    
059                    Log log = LogFactoryUtil.getLog("osgi.logging." + symbolicName);
060    
061                    String message = logEntry.getMessage();
062    
063                    ServiceReference<?> serviceReference = logEntry.getServiceReference();
064    
065                    if (serviceReference != null) {
066                            message += " " + serviceReference.toString();
067                    }
068    
069                    if ((level == LogService.LOG_DEBUG) && log.isDebugEnabled()) {
070                            log.debug(message, logEntry.getException());
071                    }
072                    else if ((level == LogService.LOG_ERROR) && log.isErrorEnabled()) {
073                            log.error(message, logEntry.getException());
074                    }
075                    else if ((level == LogService.LOG_INFO) && log.isInfoEnabled()) {
076                            log.info(message, logEntry.getException());
077                    }
078                    else if ((level == LogService.LOG_WARNING) && log.isWarnEnabled()) {
079                            log.warn(message, logEntry.getException());
080                    }
081            }
082    
083            public void modifiedService(
084                    ServiceReference<LogReaderService> serviceReference,
085                    LogReaderService logReaderService) {
086            }
087    
088            public void removedService(
089                    ServiceReference<LogReaderService> serviceReference,
090                    LogReaderService logReaderService) {
091    
092                    logReaderService.removeLogListener(this);
093            }
094    
095            public void start(BundleContext bundleContext) throws Exception {
096                    _bundleContext = bundleContext;
097    
098                    _serviceTracker =
099                            new ServiceTracker<LogReaderService, LogReaderService>(
100                                    bundleContext, LogReaderService.class, this);
101    
102                    _serviceTracker.open();
103            }
104    
105            public void stop(BundleContext bundleContext) throws Exception {
106                    _serviceTracker.close();
107    
108                    _serviceTracker = null;
109    
110                    _bundleContext = null;
111            }
112    
113            private BundleContext _bundleContext;
114            private ServiceTracker<LogReaderService, LogReaderService> _serviceTracker;
115    
116    }