/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.felix.useradmin.mongodb.osgi;
import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceReference;
import org.osgi.service.log.LogService;
import org.osgi.util.tracker.ServiceTracker;
/**
* Provides a facade for {@link LogService} allowing it to be not
* available as actual service without its users knowing about this.
*/
public class LogServiceHelper extends ServiceTracker implements LogService {
/**
* Creates a new {@link LogServiceHelper} instance.
*
* @param context the bundle context to use, cannot be <code>null</code>.
*/
public LogServiceHelper(BundleContext context) {
super(context, LogService.class.getName(), null);
}
@Override
public void log(int level, String message) {
LogService logService = getLogService();
if (logService != null) {
logService.log(level, message);
}
}
@Override
public void log(int level, String message, Throwable exception) {
LogService logService = getLogService();
if (logService != null) {
logService.log(level, message, exception);
}
}
@Override
public void log(ServiceReference sr, int level, String message) {
LogService logService = getLogService();
if (logService != null) {
logService.log(sr, level, message);
}
}
@Override
public void log(ServiceReference sr, int level, String message, Throwable exception) {
LogService logService = getLogService();
if (logService != null) {
logService.log(sr, level, message, exception);
}
}
/**
* @return a {@link LogService} instance, or <code>null</code> if not available.
*/
private LogService getLogService() {
return (LogService) getService();
}
}