org.mule.module.management.mbean

Interface YourKitProfilerServiceMBean

All Known Implementing Classes:

YourKitProfilerService

public interface YourKitProfilerServiceMBean

Field Summary

Fields

Modifier and Type	Field and Description
static long	ALLOCATION_RECORDING_ADAPTIVE
static long	ALLOCATION_RECORDING_ALL
static long	CPU_J2EE
static long	CPU_SAMPLING
static long	CPU_TRACING
static long	MONITOR_PROFILING
static long	SNAPSHOT_CAPTURING this mark is added to getStatus to indicate that captureEverySec was stated
static long	SNAPSHOT_HPROF
static long	SNAPSHOT_WITH_HEAP
static long	SNAPSHOT_WITHOUT_HEAP

Method Summary

Methods

Modifier and Type	Method and Description
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 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 startCapturingMemSnapshot(int)
void	stopCPUProfiling() Stop CPU profiling.
void	stopMonitorProfiling() Stop monitor profiling (requires that the profiled application runs on Java 5 or newer)

Field Detail

ALLOCATION_RECORDING_ALL

static final long ALLOCATION_RECORDING_ALL

See Also:

Constant Field Values

ALLOCATION_RECORDING_ADAPTIVE

static final long ALLOCATION_RECORDING_ADAPTIVE

See Also:

Constant Field Values

CPU_SAMPLING

static final long CPU_SAMPLING

See Also:

Constant Field Values

CPU_TRACING

static final long CPU_TRACING

See Also:

Constant Field Values

MONITOR_PROFILING

static final long MONITOR_PROFILING

See Also:

Constant Field Values

CPU_J2EE

static final long CPU_J2EE

See Also:

Constant Field Values

SNAPSHOT_WITHOUT_HEAP

static final long SNAPSHOT_WITHOUT_HEAP

See Also:

Constant Field Values

SNAPSHOT_WITH_HEAP

static final long SNAPSHOT_WITH_HEAP

See Also:

Constant Field Values

SNAPSHOT_HPROF

static final long SNAPSHOT_HPROF

See Also:

Constant Field Values

SNAPSHOT_CAPTURING

static final long SNAPSHOT_CAPTURING

this mark is added to getStatus to indicate that captureEverySec was stated

See Also:

Constant Field Values

Method Detail

getHost

String getHost()

Returns:

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

getPort

int getPort()

Returns:

port profiler agent listens on.

captureMemorySnapshot

String captureMemorySnapshot()
                             throws Exception

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

Returns:

absolute path to the captured snapshot.

Throws:

Exception

captureSnapshot

String captureSnapshot(long snapshotFlags)
                       throws Exception

Captures snapshot: write profiling information to file.

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

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

advanceGeneration

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.

Parameters:

description - optional description associated with the generation

Throws:

Exception - if generation could not be advanced.

startAllocationRecording

void startAllocationRecording(long mode)
                              throws Exception

Start object allocation recording.

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:

captureMemorySnapshot(), stopCPUProfiling()

stopAllocationRecording

void stopAllocationRecording()
                             throws Exception

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

void startCPUProfiling(long mode,
                     String filters)
                       throws Exception

Start CPU profiling.

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:

captureSnapshot(long), stopCPUProfiling()

stopCPUProfiling

void stopCPUProfiling()
                      throws Exception

Stop CPU profiling.

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:

captureSnapshot(long), startCPUProfiling(long , String)

forceGC

String forceGC()
               throws Exception

Force GC

Returns:

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

Throws:

Exception

startMonitorProfiling

void startMonitorProfiling()
                           throws Exception

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

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:

stopMonitorProfiling(), captureSnapshot(long)

stopMonitorProfiling

void stopMonitorProfiling()
                          throws Exception

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

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:

startMonitorProfiling(), captureSnapshot(long)

startCapturingMemSnapshot

void startCapturingMemSnapshot(int seconds)

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

Parameters:

seconds - delay between calls

See Also:

captureMemorySnapshot()

stopCapturingMemSnapshot

void stopCapturingMemSnapshot()

Stops daemon thread started by startCapturingMemSnapshot(int)

getStatus

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");
 }
 

Returns:

a bit mask to check against Profiling Modes

Throws:

Exception