org.apache.jena.dboe.sys

Class ProcessUtils

java.lang.Object

org.apache.jena.dboe.sys.ProcessUtils

public class ProcessUtils
extends Object

Constructor Summary

Constructors

Constructor and Description
ProcessUtils()

Method Summary

Modifier and Type	Method and Description
static int	getPid(int fallback) Tries to get the PID of the current process caching it for future calls since it won't change throughout the life of the process
static boolean	isAlive(int pid) Determines whether a given PID is alive
static boolean	negativePidsTreatedAsAlive() Gets whether the platform we are running on will cause us to treat negative (i.e.

Methods inherited from class java.lang.Object

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

Constructor Detail

ProcessUtils

public ProcessUtils()

Method Detail

getPid

public static int getPid(int fallback)

Tries to get the PID of the current process caching it for future calls since it won't change throughout the life of the process

Parameters:

fallback - Fallback PID to return if unable to determine the PID i.e. an error code to return

Returns:

PID of current process or provided fallback if unable to determine PID

isAlive

public static boolean isAlive(int pid)

Determines whether a given PID is alive

Parameters:

pid - PID

Returns:

True if the given PID is alive or unknown, false if it is dead

negativePidsTreatedAsAlive

public static boolean negativePidsTreatedAsAlive()

Gets whether the platform we are running on will cause us to treat negative (i.e. invalid) PIDs as alive because of the format in which the command line process monitor application for the system returns errors for invalid PIDs

Returns:

True if a negative PID is treated as alive on this platform or we cannot determine liveness for PIDs on this platform, false otherwise