Package jade.imtp.leap.JICP

Class FrontEndDispatcher

java.lang.Object

jade.imtp.leap.JICP.FrontEndDispatcher

All Implemented Interfaces:

FEConnectionManager, TimerListener, Dispatcher, Runnable

Direct Known Subclasses:

FrontEndSDispatcher

public class FrontEndDispatcher
extends Object
implements FEConnectionManager, Dispatcher, TimerListener, Runnable

Single full-duplex connection based Front End side dispatcher class

Author:

Giovanni Caire - TILAB

Field Summary

Fields

Modifier and Type	Field	Description
protected String	bindHost
protected int	bindPort
protected long	connectionTimeout
protected String	myMediatorClass
boolean	refreshingConnection

Constructor Summary

Constructors

Constructor	Description
FrontEndDispatcher()

Method Summary

Modifier and Type	Method	Description
byte[]	dispatch(byte[] payload, boolean flush, int oldSessionId)	Deliver a serialized command to the BackEnd.
void	doTimeOut(Timer t)	Mutual exclusion with updateKeepAlive(), updateConnectionDropDown() and clearTimers()
BackEnd	getBackEnd(FrontEnd fe, Properties props)	Connect to a remote BackEnd and return a stub to communicate with it
protected JICPConnection	getConnection(TransportAddress ta)	subclasses may overwrite this to provide their version of a JICPConnection
protected void	handleReconnection(Connection c)
protected JICPPacket	prepareDropDownRequest()
void	run()
void	shutdown()	Make this FrontEndDispatcher terminate.
protected void	undrop()

Methods inherited from class java.lang.Object

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

Field Detail

myMediatorClass

protected String myMediatorClass

connectionTimeout

protected long connectionTimeout

bindHost

protected String bindHost

bindPort

protected int bindPort

refreshingConnection

public boolean refreshingConnection

Constructor Detail

FrontEndDispatcher

public FrontEndDispatcher()

Method Detail

getBackEnd

public BackEnd getBackEnd(FrontEnd fe,
                          Properties props)
                   throws IMTPException

Connect to a remote BackEnd and return a stub to communicate with it

Specified by:

getBackEnd in interface FEConnectionManager

Parameters:

fe - The FrontEnd container that is requesting the connection setup.

props - Additional (implementation dependent) connection configuration properties.

Returns:

A stub of the remote BackEnd.

Throws:

IMTPException

shutdown

public void shutdown()

Make this FrontEndDispatcher terminate.

Specified by:

shutdown in interface FEConnectionManager

dispatch

public byte[] dispatch(byte[] payload,
                       boolean flush,
                       int oldSessionId)
                throws ICPException

Deliver a serialized command to the BackEnd.

Specified by:

dispatch in interface Dispatcher

Returns:

The serialized response

Throws:

ICPException

getConnection

protected JICPConnection getConnection(TransportAddress ta)
                                throws IOException

subclasses may overwrite this to provide their version of a JICPConnection

Parameters:

ta -

Returns:

Throws:

IOException

run

public void run()

Specified by:

run in interface Runnable

handleReconnection

protected void handleReconnection(Connection c)

doTimeOut

public void doTimeOut(Timer t)

Mutual exclusion with updateKeepAlive(), updateConnectionDropDown() and clearTimers()

Specified by:

doTimeOut in interface TimerListener

prepareDropDownRequest

protected JICPPacket prepareDropDownRequest()

undrop

protected void undrop()
               throws ICPException

Throws:

ICPException