ml.shifu.guagua.util

Class JMap

java.lang.Object

ml.shifu.guagua.util.JMap

public class JMap
extends Object

Helper to run jmap and print the output. Copy from Apache Giraph.

Field Summary

Fields

Modifier and Type	Field and Description
static String	ARGS Arguments to pass in to command
static String	CMD The command to run

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	JMap() Do not construct

Method Summary

Methods

Modifier and Type	Method and Description
static int	getProcessId() Get the process ID of the current running process
static void	heapHistogramDump(int numLines) Run jmap, print numLines of output from it to stderr.
static void	heapHistogramDump(int numLines, PrintStream printStream) Run jmap, print numLines of output from it to stream passed in.

Methods inherited from class java.lang.Object

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

Field Detail

CMD

public static final String CMD

The command to run

See Also:

Constant Field Values

ARGS

public static final String ARGS

Arguments to pass in to command

See Also:

Constant Field Values

Constructor Detail

JMap

protected JMap()

Do not construct

Method Detail

getProcessId

public static int getProcessId()

Get the process ID of the current running process

Returns:

Integer process ID

heapHistogramDump

public static void heapHistogramDump(int numLines)

Run jmap, print numLines of output from it to stderr.

Parameters:

numLines - Number of lines to print

heapHistogramDump

public static void heapHistogramDump(int numLines,
                     PrintStream printStream)

Run jmap, print numLines of output from it to stream passed in.

Parameters:

numLines - Number of lines to print

printStream - Stream to print to