Package adams.core.management

Class JMap

java.lang.Object

adams.core.management.Java

adams.core.management.JMap

public class JMap
extends Java

A helper class for the jmap utility.

Version:

$Revision$

Author:

fracpete (fracpete at waikato dot ac dot nz)

Field Summary

Fields

Modifier and Type	Field	Description
static String	EXECUTABLE	the jmap executable.

Fields inherited from class adams.core.management.Java

BIN_DIR, CLASSPATH_FULL, CLASSPATH_SHORT, JAVA, JAVAC, MAJOR_VERSION

Constructor Summary

Constructors

Constructor	Description
JMap()

Method Summary

Modifier and Type	Method	Description
static String	execute(long pid)	Executes jmap with default options and returns the output.
static String	execute(String options, long pid)	Executes jmap and returns the output.
static String	execute(String executable, String options, long pid)	Executes jmap and returns the output.
static String	getDefaultOptions()	Returns the default options ("-histo:live") for jmap.
static String	getExecutablePath()	Returns the full path of the JMap executable, if possible.
static boolean	isAvailable()	Checks whether jmap is available at all.

Methods inherited from class adams.core.management.Java

execute, getBinDir, getBinDir, getClassPath, getHome, getJavaExecutable, getMajorVersion, isJDK, isJDK, isJRE, isJRE, main

Methods inherited from class java.lang.Object

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

Field Detail

EXECUTABLE

public static final String EXECUTABLE

the jmap executable.

See Also:

Constant Field Values

Constructor Detail

JMap

public JMap()

Method Detail

isAvailable

public static boolean isAvailable()

Checks whether jmap is available at all.

Returns:

true if available

getExecutablePath

public static String getExecutablePath()

Returns the full path of the JMap executable, if possible.

Returns:

the full path of the executable if possible, otherwise just the executable

getDefaultOptions

public static String getDefaultOptions()

Returns the default options ("-histo:live") for jmap.

Returns:

the default options

execute

public static String execute(long pid)

Executes jmap with default options and returns the output.

Parameters:

pid - the process ID of the JVM to connect to, gets determined automatically if AUTO_PID

Returns:

the output

See Also:

getDefaultOptions(), Java#AUTO_PID

execute

public static String execute(String options,
                             long pid)

Executes jmap and returns the output.

Parameters:

options - additional options for jmap

pid - the process ID of the JVM to connect to, gets determined automatically if AUTO_PID

Returns:

the output

See Also:

Java#AUTO_PID

execute

public static String execute(String executable,
                             String options,
                             long pid)

Executes jmap and returns the output.

Parameters:

executable - the jmap executable to use

options - additional options for jmap

pid - the process ID of the JVM to connect to, gets determined automatically if AUTO_PID

Returns:

the output

See Also:

Java#AUTO_PID