org.mule.module.management.mbean
Class YourKitProfilerService

java.lang.Object
  org.mule.module.management.mbean.YourKitProfilerService

All Implemented Interfaces:

YourKitProfilerServiceMBean

public class YourKitProfilerService
extends Object
implements YourKitProfilerServiceMBean

Field Summary

protected Log

logger logger used by this class

Fields inherited from interface org.mule.module.management.mbean.YourKitProfilerServiceMBean

ALLOCATION_RECORDING_ADAPTIVE, ALLOCATION_RECORDING_ALL, CPU_J2EE, CPU_SAMPLING, CPU_TRACING, MONITOR_PROFILING, SNAPSHOT_CAPTURING, SNAPSHOT_HPROF, SNAPSHOT_WITH_HEAP, SNAPSHOT_WITHOUT_HEAP

Constructor Summary

YourKitProfilerService()

Method Summary

void	advanceGeneration(String description) Advance current object generation number.
String	captureMemorySnapshot() This method is just a convenient replacement of captureSnapshot(YourKitProfilerServiceMBean.SNAPSHOT_WITH_HEAP)
String	captureSnapshot(long snapshotFlags) Captures snapshot: write profiling information to file.
String	forceGC() Force GC
String	getHost()
int	getPort()
long	getStatus() Get current profiling status.
void	startAllocationRecording(long mode) Start object allocation recording.
void	startCapturingMemSnapshot(int seconds) Starts new daemon thread which calls YourKitProfilerServiceMBean.captureMemorySnapshot() every N seconds.
void	startCPUProfiling(long mode, String filters) Start CPU profiling.
void	startMonitorProfiling() Start monitor profiling (requires that the profiled application runs on Java 5 or newer)
void	stopAllocationRecording()
void	stopCapturingMemSnapshot() Stops daemon thread started by YourKitProfilerServiceMBean.startCapturingMemSnapshot(int)
void	stopCPUProfiling() Stop CPU profiling.
void	stopMonitorProfiling() Stop monitor profiling (requires that the profiled application runs on Java 5 or newer)

Methods inherited from class java.lang.Object

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

Field Detail

logger

protected transient Log logger

logger used by this class

Constructor Detail

YourKitProfilerService

public YourKitProfilerService()
                       throws Exception

Throws:

Exception

Method Detail

getHost

public String getHost()

Specified by:

getHost in interface YourKitProfilerServiceMBean

Returns:

name of host where controlled profiled application is running. The method never returns null.

getPort

public int getPort()

Specified by:

getPort in interface YourKitProfilerServiceMBean

Returns:

port profiler agent listens on.

captureMemorySnapshot

public String captureMemorySnapshot()
                             throws Exception

This method is just a convenient replacement of captureSnapshot(YourKitProfilerServiceMBean.SNAPSHOT_WITH_HEAP)

Specified by:

captureMemorySnapshot in interface YourKitProfilerServiceMBean

Returns:

absolute path to the captured snapshot.

Throws:

Exception

captureSnapshot

public String captureSnapshot(long snapshotFlags)
                       throws Exception

Captures snapshot: write profiling information to file.

If some profiling is being performed (e.g. started with YourKitProfilerServiceMBean.startCPUProfiling(long, String), YourKitProfilerServiceMBean.startMonitorProfiling() or YourKitProfilerServiceMBean.startAllocationRecording(long), or remotely), it won't stop after the capture. To stop it, explicitly call YourKitProfilerServiceMBean.stopCPUProfiling(), YourKitProfilerServiceMBean.stopMonitorProfiling() or YourKitProfilerServiceMBean.stopAllocationRecording().

Specified by:

captureSnapshot in interface YourKitProfilerServiceMBean

Parameters:

snapshotFlags - defines how much information should be stored:

• YourKitProfilerServiceMBean.SNAPSHOT_WITHOUT_HEAP - capture snapshot with all the recorded information (CPU profiling, monitors, telemetry), but without the heap dump.
• YourKitProfilerServiceMBean.SNAPSHOT_WITH_HEAP - capture snapshot with all the recorded information (CPU profiling, monitors, telemetry, allocations), as well as with the heap dump.
• YourKitProfilerServiceMBean.SNAPSHOT_HPROF - capture snapshot in HPROF format (it will including the heap dump only).

Returns:

absolute path to the captured snapshot.

Throws:

Exception - if capture failed. The possible reasons are:

• there's no Java application with properly configured profiler agent listening on port at host
• profiled application has terminated
• agent cannot capture snapshot for some reason

startAllocationRecording

public void startAllocationRecording(long mode)
                              throws Exception

Start object allocation recording.

Specified by:

startAllocationRecording in interface YourKitProfilerServiceMBean

Parameters:

mode - YourKitProfilerServiceMBean.ALLOCATION_RECORDING_ALL or YourKitProfilerServiceMBean.ALLOCATION_RECORDING_ADAPTIVE

Throws:

Exception - if capture failed. The possible reasons are:

• there's no Java application with properly configured profiler agent listening on port at host
• profiled application has terminated
• agent cannot capture snapshot for some reason

See Also:

YourKitProfilerServiceMBean.captureMemorySnapshot(), YourKitProfilerServiceMBean.stopCPUProfiling()

stopAllocationRecording

public void stopAllocationRecording()
                             throws Exception

Specified by:

stopAllocationRecording in interface YourKitProfilerServiceMBean

Throws:

Exception - if capture failed. The possible reasons are:

• there's no Java application with properly configured profiler agent listening on port at host
• profiled application has terminated
• agent cannot capture snapshot for some reason

startCPUProfiling

public void startCPUProfiling(long mode,
                              String filters)
                       throws Exception

Start CPU profiling.

Specified by:

startCPUProfiling in interface YourKitProfilerServiceMBean

Parameters:

mode - YourKitProfilerServiceMBean.CPU_SAMPLING or YourKitProfilerServiceMBean.CPU_TRACING or YourKitProfilerServiceMBean.CPU_SAMPLING | YourKitProfilerServiceMBean.CPU_J2EE or YourKitProfilerServiceMBean.CPU_TRACING | YourKitProfilerServiceMBean.CPU_J2EE

filters - string containing '\n'-separated list of classes whose methods should not be profiled. Wildcards are accepted ('*'). More methods are profiled, bigger the overhead. The filters are used with YourKitProfilerServiceMBean.CPU_TRACING only; with YourKitProfilerServiceMBean.CPU_SAMPLING the value is ignored. If null or empty string passed, all methods will be profiled (not recommended due to high overhead). For example, you can pass DEFAULT_FILTERS.

Throws:

Exception - if capture failed. The possible reasons are:

• there's no Java application with properly configured profiler agent listening on port at host
• specified profiling mode is not supported by the JVM of the profiled application, e.g. tracing is supported with Java 5 and newer and thus is not available with Java 1.4.
• profiled application has terminated
• agent cannot capture snapshot for some reason

See Also:

YourKitProfilerServiceMBean.captureSnapshot(long), YourKitProfilerServiceMBean.stopCPUProfiling()

stopCPUProfiling

public void stopCPUProfiling()
                      throws Exception

Stop CPU profiling.

Specified by:

stopCPUProfiling in interface YourKitProfilerServiceMBean

Throws:

Exception - if capture failed. The possible reasons are:

• there's no Java application with properly configured profiler agent listening on port at host
• profiled application has terminated
• agent cannot capture snapshot for some reason

See Also:

YourKitProfilerServiceMBean.captureSnapshot(long), YourKitProfilerServiceMBean.startCPUProfiling(long , String)

startMonitorProfiling

public void startMonitorProfiling()
                           throws Exception

Start monitor profiling (requires that the profiled application runs on Java 5 or newer)

Specified by:

startMonitorProfiling in interface YourKitProfilerServiceMBean

Throws:

Exception - if capture failed. The possible reasons are:

• there's no Java application with properly configured profiler agent listening on port at host
• specified profiling mode is not supported by the JVM of the profiled application, e.g. tracing is supported with Java 5 and newer and thus is not available with Java 1.4.
• CPU profiling has already been started
• profiled application has terminated
• agent cannot capture snapshot for some reason

See Also:

YourKitProfilerServiceMBean.stopMonitorProfiling(), YourKitProfilerServiceMBean.captureSnapshot(long)

stopMonitorProfiling

public void stopMonitorProfiling()
                          throws Exception

Stop monitor profiling (requires that the profiled application runs on Java 5 or newer)

Specified by:

stopMonitorProfiling in interface YourKitProfilerServiceMBean

Throws:

Exception - if capture failed. The possible reasons are:

• there's no Java application with properly configured profiler agent listening on port at host
• profiled application has terminated
• agent cannot capture snapshot for some reason

See Also:

YourKitProfilerServiceMBean.startMonitorProfiling(), YourKitProfilerServiceMBean.captureSnapshot(long)

advanceGeneration

public void advanceGeneration(String description)
                       throws Exception

Advance current object generation number. Since that moment, all newly created objects will belong to the new generation. Note that generations are also automatically advanced on capturing snapshots. Generations are only available if the profiled application runs on Java 5 or newer.

Specified by:

advanceGeneration in interface YourKitProfilerServiceMBean

Parameters:

description - optional description associated with the generation

Throws:

Exception - if generation could not be advanced.

forceGC

public String forceGC()
               throws Exception

Force GC

Specified by:

forceGC in interface YourKitProfilerServiceMBean

Returns:

Message contains size of objects in heap before GC, bytes and size of objects in heap after GC, bytes

Throws:

Exception

startCapturingMemSnapshot

public void startCapturingMemSnapshot(int seconds)

Starts new daemon thread which calls YourKitProfilerServiceMBean.captureMemorySnapshot() every N seconds.

Specified by:

startCapturingMemSnapshot in interface YourKitProfilerServiceMBean

Parameters:

seconds - delay between calls

See Also:

YourKitProfilerServiceMBean.captureMemorySnapshot()

stopCapturingMemSnapshot

public void stopCapturingMemSnapshot()

Stops daemon thread started by YourKitProfilerServiceMBean.startCapturingMemSnapshot(int)

Specified by:

stopCapturingMemSnapshot in interface YourKitProfilerServiceMBean

getStatus

public long getStatus()
               throws Exception

Get current profiling status. The following code snippet demonstrates how to use this method:

 long status = controller.getStatus();
 

 if ((status & YourKitProfilerServiceMBean.ALLOCATION_RECORDING_ADAPTIVE) != 0) {
  System.out.println("Allocation recording is on (adaptive)");
 }
 else if ((status & YourKitProfilerServiceMBean.ALLOCATION_RECORDING_ALL) != 0) {
  System.out.println("Allocation recording is on (all objects)");
 }
 else {
  System.out.println("Allocation recording is off");
 }
 

 if ((status & YourKitProfilerServiceMBean.CPU_TRACING) != 0) {
  System.out.println("CPU profiling is on (tracing)");
 }
 else if ((status & YourKitProfilerServiceMBean.CPU_SAMPLING) != 0) {
  System.out.println("CPU profiling is on (sampling)");
 }
 else {
  System.out.println("CPU profiling is off");
 }
 

 if ((status & YourKitProfilerServiceMBean.MONITOR_PROFILING) != 0) {
  System.out.println("Monitor profiling is on");
 }
 else {
  System.out.println("Monitor profiling is off");
 }
  if ((status & YourKitProfilerServiceMBean.SNAPSHOT_CAPTURING) != 0) {
  System.out.println("Snaphot capturing is on");
 }
 else {
  System.out.println("Snaphot capturing is off");
 }
 

Specified by:

getStatus in interface YourKitProfilerServiceMBean

Returns:

a bit mask to check against Profiling Modes

Throws:

Exception