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 }