| /* |
| * Copyright (c) 2004, 2011, Oracle and/or its affiliates. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * - Neither the name of Oracle nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
| * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /* |
| * This source code is provided to illustrate the usage of a given feature |
| * or technique and has been deliberately simplified. Additional steps |
| * required for a production-quality application, such as security checks, |
| * input validation and proper error handling, might not be present in |
| * this sample code. |
| */ |
| |
| |
| /* |
| */ |
| |
| import javax.management.*; |
| import javax.management.remote.*; |
| import java.io.IOException; |
| import java.net.MalformedURLException; |
| |
| /** |
| * This FullThreadDump class demonstrates the capability to get |
| * a full thread dump and also detect deadlock remotely. |
| */ |
| public class FullThreadDump { |
| private MBeanServerConnection server; |
| private JMXConnector jmxc; |
| public FullThreadDump(String hostname, int port) { |
| System.out.println("Connecting to " + hostname + ":" + port); |
| |
| // Create an RMI connector client and connect it to |
| // the RMI connector server |
| String urlPath = "/jndi/rmi://" + hostname + ":" + port + "/jmxrmi"; |
| connect(urlPath); |
| } |
| |
| public void dump() { |
| try { |
| ThreadMonitor monitor = new ThreadMonitor(server); |
| monitor.threadDump(); |
| if (!monitor.findDeadlock()) { |
| System.out.println("No deadlock found."); |
| } |
| } catch (IOException e) { |
| System.err.println("\nCommunication error: " + e.getMessage()); |
| System.exit(1); |
| } |
| } |
| |
| /** |
| * Connect to a JMX agent of a given URL. |
| */ |
| private void connect(String urlPath) { |
| try { |
| JMXServiceURL url = new JMXServiceURL("rmi", "", 0, urlPath); |
| this.jmxc = JMXConnectorFactory.connect(url); |
| this.server = jmxc.getMBeanServerConnection(); |
| } catch (MalformedURLException e) { |
| // should not reach here |
| } catch (IOException e) { |
| System.err.println("\nCommunication error: " + e.getMessage()); |
| System.exit(1); |
| } |
| } |
| |
| public static void main(String[] args) { |
| if (args.length != 1) { |
| usage(); |
| } |
| |
| String[] arg2 = args[0].split(":"); |
| if (arg2.length != 2) { |
| usage(); |
| } |
| String hostname = arg2[0]; |
| int port = -1; |
| try { |
| port = Integer.parseInt(arg2[1]); |
| } catch (NumberFormatException x) { |
| usage(); |
| } |
| if (port < 0) { |
| usage(); |
| } |
| |
| // get full thread dump and perform deadlock detection |
| FullThreadDump ftd = new FullThreadDump(hostname, port); |
| ftd.dump(); |
| } |
| |
| private static void usage() { |
| System.out.println("Usage: java FullThreadDump <hostname>:<port>"); |
| } |
| } |