service.id
Class IdentificationService

java.lang.Object
  service.Service
      service.id.IdentificationService

All Implemented Interfaces:

java.lang.Runnable, IIdentification

public class IdentificationService
extends Service
implements IIdentification, java.lang.Runnable

Identification service allowing for a process to know all process identifiers of the system.

Field Summary

protected java.net.InetAddress	group IP address of the multicast group
protected java.util.Vector<ProcessIdentifier>	identifiers Identifiers of all processes of the system.
protected java.net.MulticastSocket	socket Multicast socket used to communication with the identification server.

Fields inherited from class service.Service

buffer, commElt, dispatcher, myType

Fields inherited from interface service.IIdentification

ipGroup, port

Constructor Summary

IdentificationService()

Method Summary

java.util.Vector<ProcessIdentifier>	getAllIdentifiers()
ProcessIdentifier	getMyIdentifier()
void	initialize(MessageDispatcher dispatcher, ICommunication commElt, MessageType myType) Initialize the service: register the service on the message dispatcher
void	leaveSystem() Leave the system: the identification server remove the current process from the process list identifiers and inform the other processes of the leaving of the current process.
protected void	printIdentifiers() Print on the standard output the set of process identifiers.
void	run() Wait for data coming from the identification server.
protected void	sendData(IdentificationData data) Send a data (i.e. a request) to the identification server.
protected void	sendIdRequestToServer() Send a request to the identification server for getting the process identifier.

Methods inherited from class service.Service

sendMessage

Methods inherited from class java.lang.Object

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

Field Detail

identifiers

protected java.util.Vector<ProcessIdentifier> identifiers

Identifiers of all processes of the system.

socket

protected java.net.MulticastSocket socket

Multicast socket used to communication with the identification server.

group

protected java.net.InetAddress group

IP address of the multicast group

Constructor Detail

IdentificationService

public IdentificationService()

Method Detail

getMyIdentifier

public ProcessIdentifier getMyIdentifier()

Specified by:

getMyIdentifier in interface IIdentification

Returns:

the identifier of the current process

getAllIdentifiers

public java.util.Vector<ProcessIdentifier> getAllIdentifiers()

Specified by:

getAllIdentifiers in interface IIdentification

Returns:

the list of identifiers of all processes of the system (excepting the one of the current process)

leaveSystem

public void leaveSystem()

Description copied from interface: IIdentification

Leave the system: the identification server remove the current process from the process list identifiers and inform the other processes of the leaving of the current process.

Specified by:

leaveSystem in interface IIdentification

sendIdRequestToServer

protected void sendIdRequestToServer()

Send a request to the identification server for getting the process identifier. Do not wait for the response to be received.

sendData

protected void sendData(IdentificationData data)

Send a data (i.e. a request) to the identification server.

Parameters:

data - the data to send

initialize

public void initialize(MessageDispatcher dispatcher,
                       ICommunication commElt,
                       MessageType myType)

Description copied from class: Service

Initialize the service: register the service on the message dispatcher

Overrides:

initialize in class Service

Parameters:

dispatcher - the message dispatcher to use for associating the current service with its type of message

commElt - the communication element to use to send messages to service parts on other processes

myType - the type of the service

printIdentifiers

protected void printIdentifiers()

Print on the standard output the set of process identifiers.

run

public void run()

Wait for data coming from the identification server.

Specified by:

run in interface java.lang.Runnable