| /* |
| * 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.io.PrintStream; |
| import java.io.PrintWriter; |
| import java.util.LinkedList; |
| import java.util.StringTokenizer; |
| |
| import org.apache.felix.shell.Command; |
| |
| public class ThreadDumpCommand extends BaseThreadDumper implements Command { |
| |
| private static final String CMD_NAME = "threads"; |
| |
| private static final String OPT_STACK = "-s"; |
| |
| public String getName() { |
| return CMD_NAME; |
| } |
| |
| public String getShortDescription() { |
| return "dumps the JVM threads"; |
| } |
| |
| public String getUsage() { |
| return CMD_NAME + " [" + OPT_STACK + "] <id> ..."; |
| } |
| |
| public void execute(String command, PrintStream out, PrintStream err) { |
| |
| // cut off leading command name |
| if (command.startsWith(CMD_NAME)) { |
| command = command.substring(CMD_NAME.length()); |
| } |
| |
| boolean longListing = false; |
| LinkedList<Long> threadIds = new LinkedList<Long>(); |
| |
| StringTokenizer tokener = new StringTokenizer(command, ", \t"); |
| while (tokener.hasMoreTokens()) { |
| String token = tokener.nextToken().trim(); |
| if (OPT_STACK.equals(token)) { |
| longListing = true; |
| } else { |
| try { |
| long threadId = Long.parseLong(token); |
| threadIds.add(threadId); |
| } catch (NumberFormatException nfe) { |
| noSuchThread(err, token); |
| } |
| } |
| } |
| |
| PrintWriter pw = new PrintWriter(out); |
| |
| if (threadIds.isEmpty()) { |
| printThreads(pw, longListing); |
| } else { |
| while (!threadIds.isEmpty()) { |
| Long threadId = threadIds.removeFirst(); |
| if (!printThread(pw, threadId, longListing)) { |
| noSuchThread(err, threadId); |
| } |
| } |
| } |
| |
| pw.flush(); |
| } |
| |
| private void noSuchThread(PrintStream err, Object threadId) { |
| err.println("No such Thread: " + threadId); |
| err.flush(); |
| } |
| |
| } |