backend
Class pingThread

java.lang.Object
  java.lang.Thread
      backend.pingThread

All Implemented Interfaces:

Runnable

public class pingThread

extends Thread

Each instance of this class represents 1 ping call. The class is called from the backend. Since this class is threaded it can be called more then once for more then 1 ip and each ping call can be run at the same time.

Field Summary

static BlackBoard	BBMethods Stores the interface of the blackboard
static int	LINUX
static int	SUN_OS
static int	WINDOWS

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

pingThread()
Used when doing a singleton ping call

pingThread(LanNode node)
Main constructor of the pingThread class.

Method Summary

static boolean	pinger(String ip) This is where the ping call happens and where all the parsing of the output takes place.
void	run() First execution point of the thread.

Methods inherited from class java.lang.Thread

activeCount, checkAccess, countStackFrames, currentThread, destroy, dumpStack, enumerate, getContextClassLoader, getName, getPriority, getThreadGroup, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setName, setPriority, sleep, sleep, start, stop, stop, suspend, toString, yield

Methods inherited from class java.lang.Object

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

Field Detail

WINDOWS

public static final int WINDOWS

See Also:

Constant Field Values

LINUX

public static final int LINUX

See Also:

Constant Field Values

SUN_OS

public static final int SUN_OS

See Also:

Constant Field Values

BBMethods

public static BlackBoard BBMethods

Stores the interface of the blackboard

Constructor Detail

pingThread

public pingThread(LanNode node)

Main constructor of the pingThread class. It accepts a lanNode and then reterives its ipaddress and stores a copy of it in the tempNode variable and if everything is ok it starts the ping thread.

Parameters:

node - Expects a lanNode from the blackboard. Once the ping call is finished it will update the ping status of the node

pingThread

public pingThread()

Used when doing a singleton ping call

Method Detail

run

public void run()

First execution point of the thread. It calls a seperate function pinger which returns true if the ping was successful and false otherwise

pinger

public static boolean pinger(String ip)

This is where the ping call happens and where all the parsing of the output takes place. The function always assumes false until the output stream shows a valid reply.

Parameters:

ip - String containing a ip address to ping

Returns:

A boolean indicating whether the ping was successful (true) and false otherwise