org.opends.server.plugins.profiler

Class ProfilerThread

java.lang.Object

java.lang.Thread

org.opends.server.api.DirectoryThread

org.opends.server.plugins.profiler.ProfilerThread

All Implemented Interfaces:

Runnable

public class ProfilerThread
extends DirectoryThread

This class defines a thread that may be used to actually perform profiling in the Directory Server. When activated, it will repeatedly retrieve thread stack traces and store them so that they can be written out and analyzed with a separate utility.

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Thread

Thread.State, Thread.UncaughtExceptionHandler

Field Summary

Fields inherited from class org.opends.server.api.DirectoryThread

DIRECTORY_THREAD_GROUP

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

Constructors

Constructor and Description
ProfilerThread(long sampleInterval) Creates a new profiler thread that will obtain stack traces at the specified interval.

Method Summary

Modifier and Type	Method and Description
void	run() Runs in a loop, periodically capturing a list of the stack traces for all active threads.
void	stopProfiling() Causes the profiler thread to stop capturing stack traces.
void	writeCaptureData(String filename) Writes the information captured by this profiler thread to the specified file.

Methods inherited from class org.opends.server.api.DirectoryThread

getAssociatedTask, getCreationStackTrace, getDebugProperties, getParentThread, initiateShutdown, isShutdownInitiated, isStarted, isStarting, setAssociatedTask, setStarted

Methods inherited from class java.lang.Thread

activeCount, checkAccess, clone, countStackFrames, currentThread, destroy, dumpStack, enumerate, getAllStackTraces, getContextClassLoader, getDefaultUncaughtExceptionHandler, getId, getName, getPriority, getStackTrace, getState, getThreadGroup, getUncaughtExceptionHandler, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setDefaultUncaughtExceptionHandler, setName, setPriority, setUncaughtExceptionHandler, sleep, sleep, start, stop, stop, suspend, toString, yield

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

ProfilerThread

public ProfilerThread(long sampleInterval)

Creates a new profiler thread that will obtain stack traces at the specified interval.

Parameters:

sampleInterval - The length of time in milliseconds between polls for stack trace information.

Method Detail

run

public void run()

Runs in a loop, periodically capturing a list of the stack traces for all active threads.

Specified by:

run in interface Runnable

Overrides:

run in class Thread

stopProfiling

public void stopProfiling()

Causes the profiler thread to stop capturing stack traces. This method will not return until the thread has stopped.

writeCaptureData

public void writeCaptureData(String filename)
                      throws IOException

Writes the information captured by this profiler thread to the specified file. This should only be called after

Parameters:

filename - The path and name of the file to write.

Throws:

IOException - If a problem occurs while trying to write the capture data.