jist.swans.app
Class AppHeartbeat

java.lang.Object
  jist.swans.app.AppHeartbeat

All Implemented Interfaces:

JistAPI.Proxiable, JistAPI.Timeless, AppInterface, NetInterface.NetHandler

public class AppHeartbeat
extends java.lang.Object
implements AppInterface, NetInterface.NetHandler

Heartbeat application.

Since:

SWANS1.0

Version:

$Id: AppHeartbeat.java,v 1.13 2004/04/06 16:07:46 barr Exp $

Author:

Rimon Barr <barr+jist@cs.cornell.edu&rt;

Nested Class Summary

private static class	AppHeartbeat.MessageHeartbeat Heartbeat packet.
private static class	AppHeartbeat.NeighbourEntry Neighbour entry information.

Nested classes/interfaces inherited from interface jist.swans.app.AppInterface

AppInterface.TcpApp, AppInterface.ThreadedApp, AppInterface.UdpApp

Field Summary

private boolean	display whether to display application output.
static short	FRESHNESS throw out information older than FRESHNESS beats.
static long	HEARTBEAT_MAX maximum heartbeat period.
static long	HEARTBEAT_MIN minimum heartbeat period.
private java.util.HashMap	neighbours list of neighbours.
private NetInterface	netEntity network entity.
private int	nodenum node identifier.
private java.lang.Object	self self-referencing proxy entity.

Constructor Summary

AppHeartbeat(int nodenum, boolean display)
Create new heartbeat application instance.

Method Summary

private long	calcDelay() Compute random heartbeat delay.
AppInterface	getAppProxy() Return self-referencing APPLICATION proxy entity.
NetInterface.NetHandler	getNetProxy() Return self-referencing NETWORK proxy entity.
private void	neighbourDiscovered(MacAddress mac) Neighbour discovered.
private void	neighbourLost(MacAddress mac) Neighbour lost.
void	receive(Message msg, NetAddress src, MacAddress lastHop, byte macId, NetAddress dst, byte priority, byte ttl) Receive a message from network layer.
void	run() Run application.
void	run(java.lang.String[] args) Run application.
void	setNetEntity(NetInterface netEntity) Set network entity.

Methods inherited from class java.lang.Object

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

Field Detail

HEARTBEAT_MIN

public static final long HEARTBEAT_MIN

minimum heartbeat period.

See Also:

Constant Field Values

HEARTBEAT_MAX

public static final long HEARTBEAT_MAX

maximum heartbeat period.

See Also:

Constant Field Values

FRESHNESS

public static final short FRESHNESS

throw out information older than FRESHNESS beats.

See Also:

Constant Field Values

netEntity

private NetInterface netEntity

network entity.

self

private java.lang.Object self

self-referencing proxy entity.

neighbours

private java.util.HashMap neighbours

list of neighbours.

nodenum

private int nodenum

node identifier.

display

private boolean display

whether to display application output.

Constructor Detail

AppHeartbeat

public AppHeartbeat(int nodenum,
                    boolean display)

Create new heartbeat application instance.

Parameters:

nodenum - node identifier

display - whether to display application output

Method Detail

setNetEntity

public void setNetEntity(NetInterface netEntity)

Set network entity.

Parameters:

netEntity - network entity

getNetProxy

public NetInterface.NetHandler getNetProxy()

Return self-referencing NETWORK proxy entity.

Returns:

self-referencing NETWORK proxy entity

getAppProxy

public AppInterface getAppProxy()

Return self-referencing APPLICATION proxy entity.

Returns:

self-referencing APPLICATION proxy entity

neighbourLost

private void neighbourLost(MacAddress mac)

Neighbour lost.

Parameters:

mac - mac adddress of neighbour lost

neighbourDiscovered

private void neighbourDiscovered(MacAddress mac)

Neighbour discovered.

Parameters:

mac - mac address of neighbour discovered

receive

public void receive(Message msg,
                    NetAddress src,
                    MacAddress lastHop,
                    byte macId,
                    NetAddress dst,
                    byte priority,
                    byte ttl)

Receive a message from network layer.

Specified by:

receive in interface NetInterface.NetHandler

Parameters:

msg - message received

src - source network address

lastHop - source link address

macId - incoming interface

dst - destination network address

priority - packet priority

ttl - packet time-to-live

calcDelay

private long calcDelay()

Compute random heartbeat delay.

Returns:

delay to next heartbeat

run

public void run(java.lang.String[] args)

Run application.

Specified by:

run in interface AppInterface

Parameters:

args - command-line parameters

run

public void run()

Run application.

Specified by:

run in interface AppInterface