| /* |
| * 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.sling.commons.log.logback.internal; |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| import ch.qos.logback.classic.Logger; |
| import ch.qos.logback.classic.LoggerContext; |
| import ch.qos.logback.classic.spi.ILoggingEvent; |
| import ch.qos.logback.core.Appender; |
| import org.apache.sling.commons.log.logback.internal.util.Util; |
| import org.osgi.framework.BundleContext; |
| import org.osgi.framework.Constants; |
| import org.osgi.framework.Filter; |
| import org.osgi.framework.FrameworkUtil; |
| import org.osgi.framework.InvalidSyntaxException; |
| import org.osgi.framework.ServiceReference; |
| import org.osgi.util.tracker.ServiceTracker; |
| |
| public class AppenderTracker extends ServiceTracker implements LogbackResetListener { |
| |
| private static final String PROP_LOGGER = "loggers"; |
| |
| private final LoggerContext loggerContext; |
| |
| private final Map<ServiceReference, AppenderInfo> appenders = new ConcurrentHashMap<ServiceReference, AppenderInfo>(); |
| |
| private final Map<String,Set<String>> appenderNameToLoggerMap = new ConcurrentHashMap<String, Set<String>>(); |
| |
| public AppenderTracker(final BundleContext context, final LoggerContext loggerContext) throws InvalidSyntaxException { |
| super(context, createFilter(), null); |
| this.loggerContext = loggerContext; |
| super.open(); |
| } |
| |
| @SuppressWarnings("unchecked") |
| @Override |
| public Object addingService(final ServiceReference reference) { |
| final Appender<ILoggingEvent> appender = (Appender<ILoggingEvent>) super.addingService(reference); |
| appender.setContext(loggerContext); |
| appender.start(); |
| |
| final AppenderInfo ai = new AppenderInfo(reference, appender); |
| appenders.put(reference, ai); |
| attachAppender(ai); |
| |
| return appender; |
| } |
| |
| @SuppressWarnings("unchecked") |
| @Override |
| public void modifiedService(final ServiceReference reference, final Object service) { |
| detachAppender(appenders.remove(reference)); |
| final AppenderInfo nai = new AppenderInfo(reference, (Appender<ILoggingEvent>) service); |
| appenders.put(reference, nai); |
| attachAppender(nai); |
| } |
| |
| @Override |
| public void removedService(final ServiceReference reference, final Object service) { |
| final AppenderInfo ai = appenders.remove(reference); |
| this.detachAppender(ai); |
| if ( ai != null ) { |
| ai.appender.stop(); |
| // context can't be unset |
| } |
| |
| super.removedService(reference, service); |
| } |
| |
| public Collection<AppenderInfo> getAppenderInfos() { |
| return appenders.values(); |
| } |
| |
| private void detachAppender(final AppenderInfo ai) { |
| if (ai != null) { |
| for (final String name : ai.getLoggers()) { |
| final Logger logger = loggerContext.getLogger(name); |
| |
| logger.detachAppender(ai.appender); |
| } |
| } |
| } |
| |
| private void attachAppender(final AppenderInfo ai) { |
| if (ai != null) { |
| for (final String name : ai.getLoggers()) { |
| final Logger logger = loggerContext.getLogger(name); |
| |
| logger.addAppender(ai.appender); |
| } |
| } |
| } |
| |
| @Override |
| public void onResetStart(final LoggerContext context) { |
| attachAppenders(); |
| } |
| |
| @Override |
| public void onResetComplete(final LoggerContext context) { |
| @SuppressWarnings("unchecked") |
| Map<String,Set<String>> appenderRefBag = |
| (Map<String, Set<String>>) context.getObject(OsgiAppenderRefInternalAction.OSGI_APPENDER_REF_BAG); |
| if(appenderRefBag == null){ |
| appenderRefBag = Collections.emptyMap(); |
| } |
| this.appenderNameToLoggerMap.clear(); |
| this.appenderNameToLoggerMap.putAll(appenderRefBag); |
| |
| attachAppenders(); |
| } |
| |
| @Override |
| public synchronized void close() { |
| super.close(); |
| appenders.clear(); |
| } |
| |
| private void attachAppenders() { |
| for (AppenderInfo ai : appenders.values()) { |
| attachAppender(ai); |
| } |
| } |
| |
| private static Filter createFilter() throws InvalidSyntaxException { |
| String filter = String.format("(&(objectClass=%s)(%s=*))", Appender.class.getName(), PROP_LOGGER); |
| return FrameworkUtil.createFilter(filter); |
| } |
| |
| class AppenderInfo { |
| private final List<String> loggers; |
| |
| final Appender<ILoggingEvent> appender; |
| |
| final String pid; |
| |
| final String name; |
| |
| public AppenderInfo(final ServiceReference ref, Appender<ILoggingEvent> appender) { |
| this.appender = appender; |
| this.pid = ref.getProperty(Constants.SERVICE_ID).toString(); |
| List<String> loggers = new ArrayList<String>(); |
| for (String logger : Util.toList(ref.getProperty(PROP_LOGGER))) { |
| loggers.add(logger); |
| } |
| |
| this.loggers = loggers; |
| this.name = appender.getName(); |
| } |
| |
| public Set<String> getLoggers(){ |
| Set<String> result = new HashSet<String>(loggers); |
| |
| if(name != null){ |
| Set<String> loggersFromConfig = appenderNameToLoggerMap.get(name); |
| if(loggersFromConfig != null){ |
| result.addAll(loggersFromConfig); |
| } |
| } |
| |
| return Collections.unmodifiableSet(result); |
| } |
| |
| |
| } |
| } |