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

        {
            assertEquals("Cause message incorrect", "Permission denied: Update createNewQueue", e.getMessage());
        }


        // Ensure that calls to MBeans outside the Qpid domain are not impeded.
        final RuntimeMXBean runtimeBean = _jmx.getManagedObject(RuntimeMXBean.class, ManagementFactory.RUNTIME_MXBEAN_NAME);
        runtimeBean.getName();
        // PASS
    }

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    if (!logger.isWarnEnabled())
    {
      return;
    }


    RuntimeMXBean runtimeMXBean = ManagementFactory.getRuntimeMXBean();


    StringBuilder dump = new StringBuilder();


    dump.append("Full thread dump ")
      .append(runtimeMXBean.getVmName())
      .append('(')
      .append(runtimeMXBean.getVmVersion())
      .append(')');
    logger.warn(dump.toString());


    Map<Thread, StackTraceElement[]> allStackTraces = Thread.getAllStackTraces();
    for (Entry<Thread, StackTraceElement[]> entry : allStackTraces.entrySet())

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    // (but hopefully something not as painful as cli options).
    for (String cmd: args) {


      if (cmd.equals("start")) {
        try {
          RuntimeMXBean runtime = ManagementFactory.getRuntimeMXBean();
          if (runtime != null) {
            LOG.info("vmName=" + runtime.getVmName() + ", vmVendor=" +
              runtime.getVmVendor() + ", vmVersion=" + runtime.getVmVersion());
            LOG.info("vmInputArguments=" + runtime.getInputArguments());
          }
          // If 'local', defer to LocalHBaseCluster instance.
          if (LocalHBaseCluster.isLocal(conf)) {
            (new LocalHBaseCluster(conf)).startup();
          } else {

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   * dump and bring up resultant hprof in something like jprofiler which
   * allows you get 'deep size' on objects.
   * @param args
   */
  public static void main(String [] args) {
    RuntimeMXBean runtime = ManagementFactory.getRuntimeMXBean();
    LOG.info("vmName=" + runtime.getVmName() + ", vmVendor=" +
      runtime.getVmVendor() + ", vmVersion=" + runtime.getVmVersion());
    LOG.info("vmInputArguments=" + runtime.getInputArguments());
    MemStore memstore1 = new MemStore();
    // TODO: x32 vs x64
    long size = 0;
    final int count = 10000;
    byte [] column = Bytes.toBytes("col:umn");

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          // LocalHBaseCluster.  It manages 'local' clusters.
          if (LocalHBaseCluster.isLocal(conf)) {
            LOG.warn("Not starting a distinct region server because " +
              HConstants.CLUSTER_DISTRIBUTED + " is false");
          } 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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    public static final String SESSION_FLOW = "qpid.session_flow";


    public static int getPID()
    {
        RuntimeMXBean rtb = ManagementFactory.getRuntimeMXBean();
        String processName = rtb.getName();
        if (processName != null && processName.indexOf('@') > 0)
        {
            try
            {
                return Integer.parseInt(processName.substring(0,processName.indexOf('@')));

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    public Date getKernelBootTime() {
        return kernel.getBootTime();
    }


    public Stats getStats() {
        RuntimeMXBean runmxbean = ManagementFactory.getRuntimeMXBean();
        MemoryMXBean memmxbean = ManagementFactory.getMemoryMXBean();
        MemoryUsage memUsage = memmxbean.getHeapMemoryUsage();
        CountStatisticImpl upTime;
        BoundedRangeStatisticImpl heapSize;


        if (stats == null) {
            stats = new JVMStatsImpl();
            // setup UpTime CountStatistic
            upTime = stats.getUpTimeImpl();
            upTime.setStartTime(runmxbean.getStartTime());
            upTime.setCount(runmxbean.getUptime());
            // setup Heap BoundedRangeStatistic
            heapSize = stats.getHeapSizeImpl();
            heapSize.setStartTime(runmxbean.getStartTime());
            heapSize.setBounds(0, memUsage.getMax());
            heapSize.setCurrent(memUsage.getUsed());
            heapSize.setLowWaterMark(memUsage.getUsed());
            heapSize.setHighWaterMark(memUsage.getUsed());
        } else {
            // update UpTime CountStatistic
            upTime = stats.getUpTimeImpl();
            upTime.setCount(runmxbean.getUptime());
            // update Heap BoundedRangeStatistic
            heapSize = stats.getHeapSizeImpl();
            heapSize.setBounds(0, memUsage.getMax());
            heapSize.setCurrent(memUsage.getUsed());
        }

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    String out = System.getenv().get("COMPUTERNAME");
    if (out == null)
      out = System.getenv().get("HOSTNAME");
    if (out == null)
    {
      RuntimeMXBean rt = ManagementFactory.getRuntimeMXBean();
      String name = rt.getName();
      out = MString.afterIndex(name, '@');
    }
    return out;
  }

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   * 
   * @return
   */
  public static String getPid() 
  {
    RuntimeMXBean rt = ManagementFactory.getRuntimeMXBean();
    String name = rt.getName();
    return MString.beforeIndex(name, '@');
  }

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  /**
   * Log information about the currently running JVM.
   */
  public static void logJVMInfo() {
    // Print out vm stats before starting up.
    RuntimeMXBean runtime = ManagementFactory.getRuntimeMXBean();
    if (runtime != null) {
      LOG.info("vmName=" + runtime.getVmName() + ", vmVendor=" +
               runtime.getVmVendor() + ", vmVersion=" + runtime.getVmVersion());
      LOG.info("vmInputArguments=" + runtime.getInputArguments());
    }
  }

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