net.kornr.osgi.jcl.LogOSGI.java Source code

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Here is the source code for net.kornr.osgi.jcl.LogOSGI.java

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/*
 *  Copyright 2008, Rodrigo Reyes (nogunner at gmail . com)
 *  
 *  Licensed under the Apache License, Version 2.0 (the "License"); 
 *  you may not use this file except in compliance with the License. 
 *  You may obtain a copy of the License at 
 *  http://www.apache.org/licenses/LICENSE-2.0 
 *  
 *  Unless required by applicable law or agreed to in writing, software 
 *  distributed under the License is distributed on an "AS IS" BASIS, 
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or 
 *  implied. See the License for the specific language governing 
 *  permissions and limitations under the License.  
 */
package net.kornr.osgi.jcl;

import org.apache.commons.logging.Log;
import org.osgi.framework.ServiceReference;
import org.osgi.service.log.LogService;

public class LogOSGI implements Log {
    /**
     * The default constructor. At its initial state, the object cannot log, but should silently ignore
     * any logging request. 
     */
    public LogOSGI() {
    }

    /**
     * Forward the log request to the internalLog(int,Object,Throwable)
     * @param level
     * @param message
     */
    final private void internalLog(int level, Object message) {
        internalLog(level, message, null);
    }

    /**
     * Check the availability of the OSGI logging service, and use it is available.
     * Does nothing otherwise.
     * @param level
     * @param message
     * @param t
     */
    final private void internalLog(int level, Object message, Throwable t) {
        LogService logservice = LogOSGIFactory.getLogService();
        ServiceReference serviceref = LogOSGIFactory.getServiceReference();

        if (logservice != null) {
            try {
                if (t != null)
                    logservice.log(serviceref, level, message.toString(), t);
                else
                    logservice.log(serviceref, level, message.toString());
            } catch (Exception exc) {
                // Service may have become invalid, just ignore any error
                // until the log service reference is updated by the
                // log factory.
            }
        }
    }

    public void debug(Object message) {
        internalLog(LogService.LOG_DEBUG, message);
    }

    public void debug(Object message, Throwable t) {
        internalLog(LogService.LOG_DEBUG, message, t);
    }

    public void error(Object message) {
        internalLog(LogService.LOG_ERROR, message);
    }

    public void error(Object message, Throwable t) {
        internalLog(LogService.LOG_ERROR, message, t);
    }

    public void fatal(Object message) {
        internalLog(LogService.LOG_ERROR, message);
    }

    public void fatal(Object message, Throwable t) {
        internalLog(LogService.LOG_ERROR, message, t);
    }

    public void info(Object message) {
        internalLog(LogService.LOG_INFO, message);
    }

    public void info(Object message, Throwable t) {
        internalLog(LogService.LOG_INFO, message, t);
    }

    public boolean isDebugEnabled() {
        return true;
    }

    public boolean isErrorEnabled() {
        return true;
    }

    public boolean isFatalEnabled() {
        return true;
    }

    public boolean isInfoEnabled() {
        return true;
    }

    public boolean isTraceEnabled() {
        return true;
    }

    public boolean isWarnEnabled() {
        return true;
    }

    public void trace(Object message) {
        internalLog(LogService.LOG_DEBUG, message);
    }

    public void trace(Object message, Throwable t) {
        internalLog(LogService.LOG_DEBUG, message, t);
    }

    public void warn(Object message) {
        internalLog(LogService.LOG_WARNING, message);
    }

    public void warn(Object message, Throwable t) {
        internalLog(LogService.LOG_WARNING, message, t);
    }

}