| /* |
| * 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.threaddump.internal; |
| |
| import java.lang.Thread.UncaughtExceptionHandler; |
| import java.util.Dictionary; |
| import java.util.Hashtable; |
| |
| import org.osgi.framework.Bundle; |
| import org.osgi.framework.BundleActivator; |
| import org.osgi.framework.BundleContext; |
| import org.osgi.framework.Constants; |
| import org.osgi.framework.ServiceFactory; |
| import org.osgi.framework.ServiceRegistration; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class Activator implements BundleActivator, UncaughtExceptionHandler { |
| |
| private static final String LOG_NAME = "org.apache.sling.commons.threaddump.internal.UncaughtExceptionHandler"; |
| |
| /** default log */ |
| private final Logger log = LoggerFactory.getLogger(LOG_NAME); |
| |
| private UncaughtExceptionHandler oldHandler; |
| |
| public void start(BundleContext bundleContext) { |
| |
| // install handler for uncaught exceptions |
| oldHandler = Thread.getDefaultUncaughtExceptionHandler(); |
| Thread.setDefaultUncaughtExceptionHandler(this); |
| |
| // install thread handler shell command |
| register(bundleContext, |
| new String[] { "org.apache.felix.shell.Command" }, |
| new ServiceFactory() { |
| |
| public void ungetService(final Bundle bundle, |
| final ServiceRegistration reg, |
| final Object consoleObject) { |
| // nothing to do |
| } |
| |
| public Object getService(final Bundle bundle, |
| final ServiceRegistration reg) { |
| return new ThreadDumpCommand(); |
| } |
| }, null); |
| |
| // install Web Console configuration printer |
| final Dictionary<String, Object> props = new Hashtable<String, Object>(); |
| props.put("felix.webconsole.label", "slingthreads"); |
| props.put("felix.webconsole.title", "Threads"); |
| props.put("felix.webconsole.configprinter.modes", "always"); |
| |
| final ThreadDumperPanel tdp = new ThreadDumperPanel(); |
| |
| register(bundleContext, new String[] { |
| tdp.getClass().getName() }, tdp, props); |
| } |
| |
| public void stop(BundleContext bundleContext) { |
| Thread.setDefaultUncaughtExceptionHandler(oldHandler); |
| } |
| |
| private void register(final BundleContext context, |
| final String[] serviceNames, |
| final Object service, |
| final Dictionary<String, Object> properties) { |
| |
| final Dictionary<String, Object> props = |
| (properties == null ? new Hashtable<String, Object>() : properties); |
| |
| // default settings |
| props.put(Constants.SERVICE_DESCRIPTION, "Thread Dumper (" |
| + serviceNames[0] + ")"); |
| props.put(Constants.SERVICE_VENDOR, "Apache Software Foundation"); |
| |
| context.registerService(serviceNames, service, props); |
| } |
| |
| // ---------- UncaughtExceptionHandler |
| |
| /** |
| * Logs the uncaught exception for the thread at level ERROR and chains to |
| * the old handler, which was installed before this handler has been |
| * installed. |
| * |
| * @param t The <code>Thread</code> which got the exception but did not |
| * handle it. |
| * @param e The uncaught <code>Throwable</code> causing the thread to die. |
| */ |
| public void uncaughtException(Thread t, Throwable e) { |
| if (e instanceof ThreadDeath) { |
| log.error("Thread " + t + " has just been killed", e); |
| } else { |
| log.error("Uncaught exception in Thread " + t, e); |
| } |
| |
| // chain to original handler |
| if (oldHandler != null) { |
| oldHandler.uncaughtException(t, e); |
| } |
| } |
| |
| } |