Examples of java.lang.management.RuntimeMXBean

java.lang.management.RuntimeMXBean
The management interface for the runtime system of the Java virtual machine.
A Java virtual machine has a single instance of the implementation class of this interface. This instance implementing this interface is an MXBean that can be obtained by calling the {@link ManagementFactory#getRuntimeMXBean} method orfrom the {@link ManagementFactory#getPlatformMBeanServer platform MBeanServer} method.
The ObjectName for uniquely identifying the MXBean for the runtime system within an MBeanServer is:
{@link ManagementFactory#RUNTIME_MXBEAN_NAME java.lang:type=Runtime}

This interface defines several convenient methods for accessing system properties about the Java virtual machine. @see JMX Specification. @see Ways to Access MXBeans @author Mandy Chung @version 1.14, 11/17/05 @since 1.5

    }


    protected String getJavaVersion(JMXConnector jmxConnector) throws Exception {
        String version;
        MBeanServerConnection mbeanServerConnection = jmxConnector.getMBeanServerConnection();
        RuntimeMXBean runtimeMXBean = ManagementFactory.newPlatformMXBeanProxy(mbeanServerConnection,
                ManagementFactory.RUNTIME_MXBEAN_NAME, RuntimeMXBean.class);
        version = runtimeMXBean.getSystemProperties().get(SYSPROP_JAVA_VERSION);
        if (version == null) {
            throw new IllegalStateException("System property [" + SYSPROP_JAVA_VERSION + "] is not defined.");
        }
        return version;
    }

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    jvm.add("memory", mem);


    // JMX properties -- probably should be moved to a different handler
    SimpleOrderedMap<Object> jmx = new SimpleOrderedMap<Object>();
    try{
      RuntimeMXBean mx = ManagementFactory.getRuntimeMXBean();
      jmx.add( "bootclasspath", mx.getBootClassPath());
      jmx.add( "classpath", mx.getClassPath() );


      // the input arguments passed to the Java virtual machine
      // which does not include the arguments to the main method.
      jmx.add( "commandLineArgs", mx.getInputArguments());
      // a map of names and values of all system properties.
      //jmx.add( "SYSTEM PROPERTIES", mx.getSystemProperties());


      jmx.add( "startTime", new Date(mx.getStartTime()));
      jmx.add( "upTimeMS",  mx.getUptime() );
    }
    catch (Exception e) {
      log.warn("Error getting JMX properties", e);
    }
    jvm.add( "jmx", jmx );

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          // LocalHBaseCluster.  It manages 'local' clusters.
          if (LocalHBaseCluster.isLocal(conf)) {
            LOG.warn("Not starting a distinct region server because " +
              "hbase.master is set to 'local' mode");
          } else {
            RuntimeMXBean runtime = ManagementFactory.getRuntimeMXBean();
            if (runtime != null) {
              LOG.info("vmInputArguments=" + runtime.getInputArguments());
            }
            Constructor<? extends HRegionServer> c =
              regionServerClass.getConstructor(HBaseConfiguration.class);
            HRegionServer hrs = c.newInstance(conf);
            Thread t = new Thread(hrs);

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    private List<InfoProvider> infoProviders = new LinkedList<InfoProvider>();


    protected Object doExecute() throws Exception {
        int maxNameLen;


        RuntimeMXBean runtime = ManagementFactory.getRuntimeMXBean();
        OperatingSystemMXBean os = ManagementFactory.getOperatingSystemMXBean();
        ThreadMXBean threads = ManagementFactory.getThreadMXBean();
        MemoryMXBean mem = ManagementFactory.getMemoryMXBean();
        ClassLoadingMXBean cl = ManagementFactory.getClassLoadingMXBean();


        //
        // print Karaf informations
        //
        maxNameLen = 25;
        System.out.println("Karaf");
        printValue("Karaf version", maxNameLen, System.getProperty("karaf.version"));
        printValue("Karaf home", maxNameLen, System.getProperty("karaf.home"));
        printValue("Karaf base", maxNameLen, System.getProperty("karaf.base"));
        printValue("Karaf etc", maxNameLen, System.getProperty("karaf.etc"));
        printValue("OSGi Framework", maxNameLen, bundleContext.getBundle(0).getSymbolicName() + " - " +
                bundleContext.getBundle(0).getVersion());
        System.out.println();


        System.out.println("JVM");
        printValue("Java Virtual Machine", maxNameLen, runtime.getVmName() + " version " + runtime.getVmVersion());
        printValue("Version", maxNameLen, System.getProperty("java.version"));
        printValue("Vendor", maxNameLen, runtime.getVmVendor());
        printValue("Pid", maxNameLen, getPid());
        printValue("Uptime", maxNameLen, printDuration(runtime.getUptime()));
        try {
            printValue("Process CPU time", maxNameLen, printDuration(getSunOsValueAsLong(os, "getProcessCpuTime") / 1000000));
        } catch (Throwable t) {
        }
        printValue("Total compile time", maxNameLen, printDuration(ManagementFactory.getCompilationMXBean().getTotalCompilationTime()));

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//        outPW.printf(INDENT_KEY_VALUE_FORMAT, "current system load average", mxBean.getSystemLoadAverage()).println();
    }


    private void dumpVMInformation(final PrintWriter outPW,
        final DateFormat dateTimeFormatInstance) {
        final RuntimeMXBean mxBean = ManagementFactory.getRuntimeMXBean();
        if( mxBean == null ) {
            return;
        }
        outPW.printf(KEY_VALUE_FORMAT,"Instance name", mxBean.getName()).println();
        outPW.printf(KEY_VALUE_FORMAT,"Start time", dateTimeFormatInstance.format(new Date(mxBean.getStartTime()))).println();
        outPW.printf(KEY_VALUE_FORMAT,"Uptime", printDuration(mxBean.getUptime())).println();
        outPW.println();
        outPW.printf(KEY_VALUE_FORMAT, "Java VM", mxBean.getVmName() + " " + mxBean.getVmVersion()).println();
        outPW.printf(INDENT_KEY_VALUE_FORMAT, "vendor", mxBean.getVmVendor()).println();
        outPW.printf(INDENT_KEY_VALUE_FORMAT, "version", System.getProperty("java.version")).println();
        outPW.println();
        outPW.println("Input arguments:");
        final List<String> inputArguments = mxBean.getInputArguments();
        for (final String argument : inputArguments) {
            if( argument != null && argument.contains("=")) {
                final String[] split = argument.split("=");
                outPW.printf(INDENT_KEY_VALUE_FORMAT, split[0], split[1]).println();
            } else {
                outPW.printf(INDENT_KEY_VALUE_FORMAT, argument,"").println();
            }
        }
        outPW.println("Classpath:");
        outPW.printf(INDENT_KEY_VALUE_FORMAT, "boot classpath", mxBean.getBootClassPath()).println();
        outPW.printf(INDENT_KEY_VALUE_FORMAT, "library path", mxBean.getLibraryPath()).println();
        outPW.printf(INDENT_KEY_VALUE_FORMAT, "classpath", mxBean.getClassPath()).println();
        outPW.println("System properties:");
        final Map<String, String> systemProperties = mxBean.getSystemProperties();
        for (final Entry<String, String> property : systemProperties.entrySet()) {
            outPW.printf(INDENT_KEY_VALUE_FORMAT, property.getKey(), property.getValue()).println();
        }
        outPW.println();
        // JIT information

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    }


    private static void writePid(String pidFile) {
        try {
            if (pidFile != null) {
                RuntimeMXBean rtb = ManagementFactory.getRuntimeMXBean();
                String processName = rtb.getName();
                Pattern pattern = Pattern.compile("^([0-9]+)@.+$", Pattern.CASE_INSENSITIVE);
                Matcher matcher = pattern.matcher(processName);
                if (matcher.matches()) {
                    int pid = Integer.parseInt(matcher.group(1));
                    Writer w = new OutputStreamWriter(new FileOutputStream(pidFile));

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            // ### this relies on the undocumented convention of the
            // RuntimeMXBean's
            // ### name starting with the PID, but there appears to be no other
            // ### way to obtain the current process' id, which we need for
            // ### the attach process
            RuntimeMXBean runtime = ManagementFactory.getRuntimeMXBean();
            String pid = runtime.getName();
            if (pid.indexOf("@") != -1)
                pid = pid.substring(0, pid.indexOf("@"));


            // JDK1.6: now attach to the current VM so we can deploy a new agent
            // ### this is a Sun JVM specific feature; other JVMs may offer

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//        outPW.printf(INDENT_KEY_VALUE_FORMAT, "current system load average", mxBean.getSystemLoadAverage()).println();
    }


    private void dumpVMInformation(final PrintWriter outPW,
        final DateFormat dateTimeFormatInstance) {
        final RuntimeMXBean mxBean = ManagementFactory.getRuntimeMXBean();
        if( mxBean == null ) {
            return;
        }
        outPW.printf(KEY_VALUE_FORMAT,"Instance name", mxBean.getName()).println();
        outPW.printf(KEY_VALUE_FORMAT,"Start time", dateTimeFormatInstance.format(new Date(mxBean.getStartTime()))).println();
        outPW.printf(KEY_VALUE_FORMAT,"Uptime", printDuration(mxBean.getUptime())).println();
        outPW.println();
        outPW.printf(KEY_VALUE_FORMAT, "Java VM", mxBean.getVmName() + " " + mxBean.getVmVersion()).println();
        outPW.printf(INDENT_KEY_VALUE_FORMAT, "vendor", mxBean.getVmVendor()).println();
        outPW.printf(INDENT_KEY_VALUE_FORMAT, "version", System.getProperty("java.version")).println();
        outPW.println();
        outPW.println("Input arguments:");
        final List<String> inputArguments = mxBean.getInputArguments();
        for (final String argument : inputArguments) {
            if( argument != null && argument.contains("=")) {
                final String[] split = argument.split("=");
                outPW.printf(INDENT_KEY_VALUE_FORMAT, split[0], split[1]).println();
            } else {
                outPW.printf(INDENT_KEY_VALUE_FORMAT, argument,"").println();
            }
        }
        outPW.println("Classpath:");
        outPW.printf(INDENT_KEY_VALUE_FORMAT, "boot classpath", mxBean.getBootClassPath()).println();
        outPW.printf(INDENT_KEY_VALUE_FORMAT, "library path", mxBean.getLibraryPath()).println();
        outPW.printf(INDENT_KEY_VALUE_FORMAT, "classpath", mxBean.getClassPath()).println();
        outPW.println("System properties:");
        final Map<String, String> systemProperties = mxBean.getSystemProperties();
        for (final Entry<String, String> property : systemProperties.entrySet()) {
            outPW.printf(INDENT_KEY_VALUE_FORMAT, property.getKey(), property.getValue()).println();
        }
        outPW.println();
        // JIT information

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    private void writePid(Properties props) {
        try {
            String pidFile = props.getProperty(KARAF_SHUTDOWN_PID_FILE);
            if (pidFile != null) {
                RuntimeMXBean rtb = ManagementFactory.getRuntimeMXBean();
                String processName = rtb.getName();
                Pattern pattern = Pattern.compile("^([0-9]+)@.+$", Pattern.CASE_INSENSITIVE);
                Matcher matcher = pattern.matcher(processName);
                if (matcher.matches()) {
                    int pid = Integer.parseInt(matcher.group(1));
                    Writer w = new OutputStreamWriter(new FileOutputStream(pidFile));

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   * @return the setting of -XX:MaxDirectMemorySize as a long. Returns 0 if
   *         -XX:MaxDirectMemorySize is not set.
   */


  public static long getDirectMemorySize() {
    RuntimeMXBean RuntimemxBean = ManagementFactory.getRuntimeMXBean();
    List<String> arguments = RuntimemxBean.getInputArguments();
    long multiplier = 1; //for the byte case.
    for (String s : arguments) {
      if (s.contains("-XX:MaxDirectMemorySize=")) {
        String memSize = s.toLowerCase()
            .replace("-xx:maxdirectmemorysize=", "").trim();

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