applications

Class PingApplication

java.lang.Object

core.Application

applications.PingApplication

public class PingApplication
extends Application

Simple ping application to demonstrate the application support. The application can be configured to send pings with a fixed interval or to only answer to pings it receives. When the application receives a ping it sends a pong message in response. The corresponding PingAppReporter class can be used to record information about the application behavior.

See Also:

PingAppReporter

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	APP_ID Application ID
static java.lang.String	PING_DEST_RANGE Destination address range - inclusive lower, exclusive upper
static java.lang.String	PING_INTERVAL Ping generation interval
static java.lang.String	PING_OFFSET Ping interval offset - avoids synchronization of ping sending
static java.lang.String	PING_PASSIVE Run in passive mode - don't generate pings but respond
static java.lang.String	PING_PING_SIZE Size of the ping message
static java.lang.String	PING_PONG_SIZE Size of the pong message
static java.lang.String	PING_SEED Seed for the app's random number generator

Fields inherited from class core.Application

appID

Constructor Summary

Constructors

Constructor and Description
PingApplication(PingApplication a) Copy-constructor
PingApplication(Settings s) Creates a new ping application with the given settings.

Method Summary

Methods

Modifier and Type	Method and Description
int	getDestMax()
int	getDestMin()
double	getInterval()
double	getLastPing()
int	getPingSize()
int	getPongSize()
int	getSeed()
Message	handle(Message msg, DTNHost host) Handles an incoming message.
boolean	isPassive()
Application	replicate()
void	setDestMax(int destMax)
void	setDestMin(int destMin)
void	setInterval(double interval)
void	setLastPing(double lastPing)
void	setPassive(boolean passive)
void	setPingSize(int pingSize)
void	setPongSize(int pongSize)
void	setSeed(int seed)
void	update(DTNHost host) Sends a ping packet if this is an active application instance.

Methods inherited from class core.Application

getAppID, getAppListeners, sendEventToListeners, setAppID, setAppListeners

Methods inherited from class java.lang.Object

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

Field Detail

PING_PASSIVE

public static final java.lang.String PING_PASSIVE

Run in passive mode - don't generate pings but respond

See Also:

Constant Field Values

PING_INTERVAL

public static final java.lang.String PING_INTERVAL

Ping generation interval

See Also:

Constant Field Values

PING_OFFSET

public static final java.lang.String PING_OFFSET

Ping interval offset - avoids synchronization of ping sending

See Also:

Constant Field Values

PING_DEST_RANGE

public static final java.lang.String PING_DEST_RANGE

Destination address range - inclusive lower, exclusive upper

See Also:

Constant Field Values

PING_SEED

public static final java.lang.String PING_SEED

Seed for the app's random number generator

See Also:

Constant Field Values

PING_PING_SIZE

public static final java.lang.String PING_PING_SIZE

Size of the ping message

See Also:

Constant Field Values

PING_PONG_SIZE

public static final java.lang.String PING_PONG_SIZE

Size of the pong message

See Also:

Constant Field Values

APP_ID

public static final java.lang.String APP_ID

Application ID

See Also:

Constant Field Values

Constructor Detail

PingApplication

public PingApplication(Settings s)

Creates a new ping application with the given settings.

Parameters:

s - Settings to use for initializing the application.

PingApplication

public PingApplication(PingApplication a)

Copy-constructor

Parameters:

a -

Method Detail

handle

public Message handle(Message msg,
             DTNHost host)

Handles an incoming message. If the message is a ping message replies with a pong message. Generates events for ping and pong messages.

Specified by:

handle in class Application

Parameters:

msg - message received by the router

host - host to which the application instance is attached

Returns:

the (possibly modified) message to forward or null if the application wants the router to stop forwarding the message.

replicate

public Application replicate()

Specified by:

replicate in class Application

update

public void update(DTNHost host)

Sends a ping packet if this is an active application instance.

Specified by:

update in class Application

Parameters:

host - to which the application instance is attached

getLastPing

public double getLastPing()

Returns:

the lastPing

setLastPing

public void setLastPing(double lastPing)

Parameters:

lastPing - the lastPing to set

getInterval

public double getInterval()

Returns:

the interval

setInterval

public void setInterval(double interval)

Parameters:

interval - the interval to set

isPassive

public boolean isPassive()

Returns:

the passive

setPassive

public void setPassive(boolean passive)

Parameters:

passive - the passive to set

getDestMin

public int getDestMin()

Returns:

the destMin

setDestMin

public void setDestMin(int destMin)

Parameters:

destMin - the destMin to set

getDestMax

public int getDestMax()

Returns:

the destMax

setDestMax

public void setDestMax(int destMax)

Parameters:

destMax - the destMax to set

getSeed

public int getSeed()

Returns:

the seed

setSeed

public void setSeed(int seed)

Parameters:

seed - the seed to set

getPongSize

public int getPongSize()

Returns:

the pongSize

setPongSize

public void setPongSize(int pongSize)

Parameters:

pongSize - the pongSize to set

getPingSize

public int getPingSize()

Returns:

the pingSize

setPingSize

public void setPingSize(int pingSize)

Parameters:

pingSize - the pingSize to set