| /* |
| * 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.threaddump.internal; |
| |
| /** |
| * {@link ThreadDumper} implementation which relies on regular Java API. |
| */ |
| final class Jdk14ThreadDumper implements ThreadDumper |
| { |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public void printThreads(ThreadWriter threadWriter) |
| { |
| // first get the root thread group |
| ThreadGroup rootGroup = getRootThreadGroup(); |
| |
| printThreadGroup(threadWriter, rootGroup); |
| |
| int numGroups = rootGroup.activeGroupCount(); |
| ThreadGroup[] groups = new ThreadGroup[2 * numGroups]; |
| rootGroup.enumerate(groups); |
| for (int i = 0; i < groups.length; i++) |
| { |
| printThreadGroup(threadWriter, groups[i]); |
| } |
| } |
| |
| private static ThreadGroup getRootThreadGroup() |
| { |
| ThreadGroup rootGroup = Thread.currentThread().getThreadGroup(); |
| while (rootGroup.getParent() != null) |
| { |
| rootGroup = rootGroup.getParent(); |
| } |
| return rootGroup; |
| } |
| |
| private static void printThreadGroup(ThreadWriter threadWriter, ThreadGroup group) |
| { |
| if (group != null) |
| { |
| int numThreads = group.activeCount(); |
| Thread[] threads = new Thread[numThreads * 2]; |
| group.enumerate(threads, false); |
| for (int i = 0; i < threads.length; i++) |
| { |
| printThread(threadWriter, threads[i]); |
| } |
| } |
| } |
| |
| private static void printThread(ThreadWriter threadWriter, Thread thread) |
| { |
| if (thread != null) |
| { |
| short status = ThreadWriter.NEW; |
| if (thread.isAlive()) |
| { |
| status = ThreadWriter.RUNNABLE; |
| } |
| else if (thread.isInterrupted()) |
| { |
| status = ThreadWriter.TERMINATED; |
| } |
| // TODO there are missing cases here! |
| |
| threadWriter.printThread(thread.getName(), thread.isDaemon(), thread.getPriority(), -1, status); |
| threadWriter.printEmptyLine(); |
| } |
| } |
| |
| } |