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Diffstat (limited to 'src/share/demo/management/FullThreadDump/FullThreadDump.java')
-rw-r--r-- | src/share/demo/management/FullThreadDump/FullThreadDump.java | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/src/share/demo/management/FullThreadDump/FullThreadDump.java b/src/share/demo/management/FullThreadDump/FullThreadDump.java new file mode 100644 index 0000000000..0b220e0edc --- /dev/null +++ b/src/share/demo/management/FullThreadDump/FullThreadDump.java @@ -0,0 +1,113 @@ +/* + * 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>"); + } +} |