MicroTAPAS.mobility
Class MicroPingClient

java.lang.Object
  |
  +--java.lang.Thread
        |
        +--MicroTAPAS.mobility.MicroPingClient

All Implemented Interfaces:

java.lang.Runnable, java.io.Serializable

public class MicroPingClient

extends java.lang.Thread

implements java.io.Serializable

This class sends ping requests at certain intervals. This class operates in one of two modes:
1) MobilityManager: Pings all nodes that are 'connected' to this MM,
2) MobilityAgent: Pings its own Director node. The interval between pings is determined dynamically, where loss of connetcion will cut the current interval in half, and a online connection of more than 10*initial interval will increase the current interval by the initial interval.

See Also:

Serialized Form

Field Summary

private AddressMonitor	am
private long	currentInterval Current interval between pings.
private static boolean	DEBUG Determines whether debug info to be sent to debug-server
private long	intervalMax Max interval between pings.
private long	intervalMin Min interval between pings.
private boolean	isActive Indicates whether this client is active or not.
private boolean	isMMNode Whether this node is a MM node.
private MobilitySupportActor	parent Reference to the parent MicroConnectionManager.
private int	pingPort Socket port to send requests to.
private java.lang.String	selfNode Variable that holds the current IP address of this node.
private java.net.Socket	socket Client socket used in pinging pingServer(s).
private long	startInterval Initial interval between pings.
private long	startTime Start time of this client.

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

MicroPingClient(MobilitySupportActor pParent)
Constructor

Method Summary

void	destroy() Destroy method
boolean	hasTerminalMoved() Compares the old stored IP to the current IP to determine if a terminal has moved from one domain to another.
void	pingLoop() Main procedure in this thread
void	run() Run method that starts this thread
Item	status() Status report of MicroPingClient in Item hierarchy of information elements.

Methods inherited from class java.lang.Thread

activeCount, checkAccess, countStackFrames, currentThread, 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

DEBUG

private static final boolean DEBUG

Determines whether debug info to be sent to debug-server

See Also:

Constant Field Values

pingPort

private int pingPort

Socket port to send requests to.

startInterval

private long startInterval

Initial interval between pings.

currentInterval

private long currentInterval

Current interval between pings.

intervalMax

private long intervalMax

Max interval between pings.

intervalMin

private long intervalMin

Min interval between pings.

startTime

private long startTime

Start time of this client.

parent

private MobilitySupportActor parent

Reference to the parent MicroConnectionManager.

am

private AddressMonitor am

isMMNode

private boolean isMMNode

Whether this node is a MM node.

socket

private java.net.Socket socket

Client socket used in pinging pingServer(s).

isActive

private boolean isActive

Indicates whether this client is active or not.

selfNode

private java.lang.String selfNode

Variable that holds the current IP address of this node.

Constructor Detail

MicroPingClient

public MicroPingClient(MobilitySupportActor pParent)

Constructor

Method Detail

run

public void run()

Run method that starts this thread

Specified by:

run in interface java.lang.Runnable

Overrides:

run in class java.lang.Thread

destroy

public void destroy()

Destroy method

Overrides:

destroy in class java.lang.Thread

pingLoop

public void pingLoop()
              throws java.lang.Exception

Main procedure in this thread

java.lang.Exception

hasTerminalMoved

public boolean hasTerminalMoved()

Compares the old stored IP to the current IP to determine if a terminal has moved from one domain to another.

Returns:

A boolean indicating whether the terminal has moved.

status

public Item status()

Status report of MicroPingClient in Item hierarchy of information elements.

Returns:

Hierarchy of Item information elements