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+/*
+ * Copyright 2004-2005 Sun Microsystems, Inc. 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 Sun Microsystems 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.
+ */
+
+/*
+ */
+
+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>");
+ }
+}