001 /**
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements. See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership. The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License. You may obtain a copy of the License at
009 *
010 * http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied. See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019 package org.apache.geronimo.mail;
020
021 import java.net.URL;
022
023 import java.util.ArrayList;
024 import java.util.Collection;
025 import java.util.List;
026
027 import org.osgi.framework.Bundle;
028 import org.osgi.framework.BundleActivator;
029 import org.osgi.framework.BundleContext;
030 import org.osgi.framework.ServiceRegistration;
031 import org.osgi.framework.ServiceReference;
032 import org.osgi.service.log.LogService;
033 import org.osgi.util.tracker.BundleTracker;
034 import org.osgi.util.tracker.ServiceTracker;
035 import org.osgi.util.tracker.ServiceTrackerCustomizer;
036
037 /**
038 * The activator that starts and manages the tracking of
039 * JAF activation command maps
040 */
041 public class Activator extends org.apache.geronimo.osgi.locator.Activator {
042 // tracker to watch for bundle updates
043 protected BundleTracker bt;
044 // service tracker for a logging service
045 protected ServiceTracker lst;
046 // an array of all active logging services.
047 protected List<LogService> logServices = new ArrayList<LogService>();
048
049 @Override
050 public synchronized void start(final BundleContext context) throws Exception {
051 super.start(context);
052 lst = new LogServiceTracker(context, LogService.class.getName(), null);
053 lst.open();
054 bt = new BundleTracker(context, Bundle.ACTIVE, new MailProviderBundleTrackerCustomizer(this, context.getBundle()));
055 bt.open();
056 }
057
058 @Override
059 public synchronized void stop(BundleContext context) throws Exception {
060 bt.close();
061 lst.close();
062 super.stop(context);
063 }
064
065 void log(int level, String message) {
066 synchronized (logServices) {
067 for (LogService log : logServices) {
068 log.log(level, message);
069 }
070 }
071 }
072
073 void log(int level, String message, Throwable th) {
074 synchronized (logServices) {
075 for (LogService log : logServices) {
076 log.log(level, message, th);
077 }
078 }
079 }
080
081 private final class LogServiceTracker extends ServiceTracker {
082 private LogServiceTracker(BundleContext context, String clazz,
083 ServiceTrackerCustomizer customizer) {
084 super(context, clazz, customizer);
085 }
086
087 @Override
088 public Object addingService(ServiceReference reference) {
089 Object svc = super.addingService(reference);
090 if (svc instanceof LogService) {
091 synchronized (logServices) {
092 logServices.add((LogService) svc);
093 }
094 }
095 return svc;
096 }
097
098 @Override
099 public void removedService(ServiceReference reference, Object service) {
100 synchronized (logServices) {
101 logServices.remove(service);
102 }
103 super.removedService(reference, service);
104 }
105 }
106 }