Simple Module PEtherApp

Package: pubsub_sim.PSetherApp
File: src/PSetherApp/PEtherApp.ned

The Ethernet Publisher Application

This publisher application needed in every publisher node in a publish subscribe network. It works just over the MAC layer, and this is why it is necessary to implement MAC encapsulation. This module extends the BasePSApp module and adds the necessary functionality. For instance, it is able only to publish new or existing Information Items, kept in the Information item table.

See also: BasePSApp

Author: Nikolaos Vastardis

Extends:

BasePSApp (simple module)

The Base of the Pub-Sub Ethernet Applications

Used in compound modules:

If a module type shows up more than once, that means it has been defined in more than one NED file.

PubHost (compound module)

The Publisher Host

Parameters:

Name	Type	Default value	Description
actPeak	double	30s	The time period the application mainly active
datarate	int	10Mbps	The datarate of each stream from the publisher
destAddress	string	"FF:FF:FF:FF:FF:FF"	destination MAC address, preferably broadcast
startTime	double	this.waitTime	time of sending the first request
pubInterval	double	10s	time interval of making a new publication
waitInterval	double	uniform(0s,1s)	interval between sending requests
reqLength	int	100B	length of request packets
respLength	int	1KB	length of response packets
fileSize	int	20Mb	the max size of the published files

Properties:

Name	Value	Description
display	i=block/app
class	PEtherApp

Gates:

Name	Direction	Size	Description
ifIn [ ]	input
ifOut [ ]	output

Source code:

//
// <b> The Ethernet Publisher Application </b>
//
// This publisher application needed in every publisher node in a publish
// subscribe network. It works just over the MAC layer, and this is why it
// is necessary to implement MAC encapsulation. This module extends the 
// BasePSApp module and adds the necessary functionality. For instance, 
// it is able only to publish new or existing Information Items, kept in 
// the Information item table.
//
// @see BasePSApp
//
// @author Nikolaos Vastardis
//
simple PEtherApp extends BasePSApp
{
    parameters:
        @class(PEtherApp);
        string destAddress = default("FF:FF:FF:FF:FF:FF");  	// destination MAC address, preferably broadcast
        double startTime @unit("s") = default(this.waitTime);	// time of sending the first request
        double pubInterval @unit("s") = default(10s);  			// time interval of making a new publication
        volatile double waitInterval @unit("s") = default(uniform(0s,1s));  // interval between sending requests
        volatile int reqLength @unit(B) = default(100B);  		// length of request packets
        volatile int respLength @unit(B) = default(1KB);  		// length of response packets
        volatile int fileSize @unit(Mb) = default(20Mb);		// the max size of the published files
        @display("i=block/app");
}