Package org.apache.hadoop.hbase.http

Class BinaryBackend

java.lang.Object

org.apache.hadoop.hbase.http.BinaryBackend

All Implemented Interfaces:

ProfilerBackend

@Private
final class BinaryBackend
extends Object
implements ProfilerBackend

Backend that invokes the async-profiler binary (asprof / profiler.sh) as an external process. Requires ASYNC_PROFILER_HOME to be set.

Field Summary

Fields

Modifier and Type	Field	Description
private static final org.slf4j.Logger	LOG
private Process	process
private final String	profilerHome

Constructor Summary

Constructors

Constructor	Description
BinaryBackend(String profilerHome)

Method Summary

Modifier and Type	Method	Description
void	destroy()	Cleans up any resources (e.g.
String	executeStart(ProfileServlet.ProfileRequest request, File outputFile)	Executes a profiling start command and returns the profiler's response.
String	executeStop(ProfileServlet.ProfileRequest request, File outputFile)	Executes a profiling stop/dump command.

Methods inherited from class java.lang.Object

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

Field Details

LOG

private static final org.slf4j.Logger LOG

profilerHome

private final String profilerHome

process

private volatile Process process

Constructor Details

BinaryBackend

BinaryBackend(String profilerHome)

Method Details

executeStart

public String executeStart(ProfileServlet.ProfileRequest request,
 File outputFile)
                    throws IOException

Description copied from interface: ProfilerBackend

Executes a profiling start command and returns the profiler's response.

Specified by:

executeStart in interface ProfilerBackend

Throws:

IOException

executeStop

public String executeStop(ProfileServlet.ProfileRequest request,
 File outputFile)
                   throws IOException

Description copied from interface: ProfilerBackend

Executes a profiling stop/dump command.

Specified by:

executeStop in interface ProfilerBackend

Throws:

IOException

destroy

public void destroy()

Description copied from interface: ProfilerBackend

Cleans up any resources (e.g. kills a running process). Called on servlet destroy.

Specified by:

destroy in interface ProfilerBackend