net.bramp.unsafe

Class MemoryUtils

java.lang.Object

net.bramp.unsafe.MemoryUtils

public final class MemoryUtils
extends Object

Constructor Summary

Constructors

Constructor and Description
MemoryUtils()

Method Summary

Modifier and Type	Method and Description
static List<String>	buildJavaArg()
static int	getPid() Returns the pid of the current process.
static String	memoryUsage() Calculates the memory usage according to Runtime.
static String	pidMemoryUsage() Calculates the memory usage according to ps for this process.
static String	pidMemoryUsage(int pid) Calculates the memory usage according to ps for a given pid.

Methods inherited from class java.lang.Object

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

Constructor Detail

MemoryUtils

public MemoryUtils()

Method Detail

memoryUsage

public static String memoryUsage()

Calculates the memory usage according to Runtime.

Returns:

max, total, free and used memory (in bytes)

pidMemoryUsage

public static String pidMemoryUsage()
                             throws IOException,
                                    InvocationTargetException,
                                    NoSuchMethodException,
                                    IllegalAccessException,
                                    NoSuchFieldException

Calculates the memory usage according to ps for this process.

Returns:

memory usage (in bytes)

Throws:

IOException

InvocationTargetException

NoSuchMethodException

IllegalAccessException

NoSuchFieldException

getPid

public static int getPid()
                  throws NoSuchFieldException,
                         IllegalAccessException,
                         NoSuchMethodException,
                         InvocationTargetException

Returns the pid of the current process. This fails on systems without process identifers.

Returns:

the processes pid

Throws:

NoSuchFieldException

IllegalAccessException

NoSuchMethodException

InvocationTargetException

pidMemoryUsage

public static String pidMemoryUsage(int pid)
                             throws IOException

Calculates the memory usage according to ps for a given pid.

Parameters:

pid - the pid of the process

Returns:

the pid, rss, and vsz for the process

Throws:

IOException

buildJavaArg

public static List<String> buildJavaArg()