| ThreadMXBean | java.lang.management |
This MXBean interface
allows monitoring of thread usage
in a Java VM. A number of methods, such as getThreadCount(
) and getPeakThreadCount( ), return
information about all running threads. Other methods return
information about individual threads. Threads are identified by their
thread id, which is a long integer.
getAllThreadIds(
) returns all ids as an array of
long. Complete information, including stack trace,
about a thread or set of threads can be obtained with the
getTHReadInfo( ) methods, which return
ThreadInfo objects.If isThreadCpuTimeSupported(
) returns TRue, you can
enable thread timing with setThreadCpuTimeEnabled(
) and query the runtime of a specific thread
with getThreadCpuTime(
) and getThreadUserTime( ).
The values returned by these methods are measured in nanoseconds.One of the potentially most useful methods of this interface is
findMonitorDeadlockedThreads(
) . It looks for cycles of
threads that are deadlocked waiting to lock objects whose locks are
held by other threads in the cycle.public interface ThreadMXBean {
// Public Instance Methods
long[ ] findMonitorDeadlockedThreads ( );
long[ ] getAllThreadIds ( );
long getCurrentThreadCpuTime ( );
long getCurrentThreadUserTime ( );
int getDaemonThreadCount ( );
int getPeakThreadCount ( );
int getThreadCount ( );
long getThreadCpuTime (long id );
ThreadInfo getThreadInfo (long id );
ThreadInfo[ ] getThreadInfo (long[ ] ids );
ThreadInfo[ ] getThreadInfo (long[ ] ids , int maxDepth );
ThreadInfo getThreadInfo (long id , int maxDepth );
long getThreadUserTime (long id );
long getTotalStartedThreadCount ( );
boolean isCurrentThreadCpuTimeSupported ( );
boolean isThreadContentionMonitoringEnabled ( );
boolean isThreadContentionMonitoringSupported ( );
boolean isThreadCpuTimeEnabled ( );
boolean isThreadCpuTimeSupported ( );
void resetPeakThreadCount ( );
void setThreadContentionMonitoringEnabled (boolean enable );
void setThreadCpuTimeEnabled (boolean enable );
}
Returned By
ManagementFactory.getThreadMXBean( ) |
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