Constructor Detail

• Diagnostics

  public Diagnostics()

Method Detail

• isThreadContentionMonitoringEnabled

  public static boolean isThreadContentionMonitoringEnabled()

  Check whether thread contention monitoring is enabled.

  Returns:

  true if thread contention monitoring is enabled

• setThreadContentionMonitoringEnabled

  public static void setThreadContentionMonitoringEnabled(boolean enable)

  Enable or disable thread contention monitoring via the ThreadMxMXBean.

  Parameters:

  enable - whether to enable thread contention monitoring

• isThreadCpuTimeEnabled

  public static boolean isThreadCpuTimeEnabled()

  Check whether thread cpu time measurement is enabled.

  Returns:

  true if thread cpu time measurement is enabled

• setThreadCpuTimeEnabled

  public static void setThreadCpuTimeEnabled(boolean enable)

  Enable or disable thread cpu time measurement via the ThreadMxMXBean.

  Parameters:

  enable - whether to enable thread cpu time measurement

• resetPeakThreadCount

  public static void resetPeakThreadCount()

  Reset peak thread count in ThreadMXBean

• setVerboseClassLoading

  public static void setVerboseClassLoading(boolean verbose)

  Set verbose class loading

  Parameters:

  verbose - whether to enable verbose class loading

• setLoggerLevel

  public static void setLoggerLevel(java.lang.String loggerName,
                    java.lang.String levelName)

  Set logger level

  Parameters:

  loggerName - the name of the logger

  levelName - the level to set

• setVerboseGarbageCollection

  public static void setVerboseGarbageCollection(boolean verbose)

  Set verbose garbage collection logging

  Parameters:

  verbose - whether to enable verbose gc logging

• gc

  public static void gc()

  Initiate garbage collection via MX Bean

• resetPeakUsage

  public static void resetPeakUsage(java.lang.String name)

  Reset peak memory usage data in MemoryPoolMXBean

  Parameters:

  name - name of the MemoryPoolMXBean or "all"

• setUsageThreshold

  public static boolean setUsageThreshold(java.lang.String name,
                          long threshold)

  Set usage threshold in MemoryPoolMXBean

  Parameters:

  name - name of the MemoryPoolMXBean

  threshold - the threshold to set

  Returns:

  true if setting the threshold succeeded

• setCollectionUsageThreshold

  public static boolean setCollectionUsageThreshold(java.lang.String name,
                                    long threshold)

  Set collection usage threshold in MemoryPoolMXBean

  Parameters:

  name - name of the MemoryPoolMXBean

  threshold - the collection threshold to set

  Returns:

  true if setting the threshold succeeded

• findDeadlock

  public static java.lang.String findDeadlock()

  Check if any threads are deadlocked. If any, print the thread dump for those threads.

  Returns:

  a deadlock message and the formatted thread dump of the deadlocked threads

• getThreadDump

  public static java.lang.String getThreadDump()

  Retrieves a formatted JVM thread dump. The default StringManager will be used.

  Returns:

  the formatted JVM thread dump

• getThreadDump

  public static java.lang.String getThreadDump(java.util.Enumeration<java.util.Locale> requestedLocales)

  Retrieves a formatted JVM thread dump. The given list of locales will be used to retrieve a StringManager.

  Parameters:

  requestedLocales - list of locales to use

  Returns:

  the formatted JVM thread dump

• getThreadDump

  public static java.lang.String getThreadDump(StringManager requestedSm)

  Retrieve a JVM thread dump formatted using the given StringManager.

  Parameters:

  requestedSm - the StringManager to use

  Returns:

  the formatted JVM thread dump

• getVMInfo

  public static java.lang.String getVMInfo()

  Retrieves a formatted JVM information text. The default StringManager will be used.

  Returns:

  the formatted JVM information text

• getVMInfo

  public static java.lang.String getVMInfo(java.util.Enumeration<java.util.Locale> requestedLocales)

  Retrieves a formatted JVM information text. The given list of locales will be used to retrieve a StringManager.

  Parameters:

  requestedLocales - list of locales to use

  Returns:

  the formatted JVM information text

• getVMInfo

  public static java.lang.String getVMInfo(StringManager requestedSm)

  Retrieve a JVM information text formatted using the given StringManager.

  Parameters:

  requestedSm - the StringManager to use

  Returns:

  the formatted JVM information text