uk.ac.ic.doc.rodex.p2p.protocol
Class HEP

java.lang.Object
  uk.ac.ic.doc.rodex.p2p.protocol.HEP

public class HEP
extends java.lang.Object

HEP.java

llo Protocol is used by peers and directory service peers to discover each other on the network. The default implementation is as follows:

• As a peer is connected to the network, it starts advertising its identity via unicast OR multicast communication channel
• Directory service peer listens on the specified channel for hello messages. When it has received a message from a peer, it decodes message content and validates this against its own configuration. If they match, d.s.p records information of this new peer and sends an acknowledgement back to the peer confirming this.

HEP is used only at the initial stage of the peer's join process. It is terminated as soon as peer has successfully formed neighbourhood with the d.s.ps

Author:

Duc M Le dmle@doc.ic.ac.uk
Created on April 18, 2006
Department of Computing, Imperial College

Method Summary

static HEP	getInstance(AutoMedPeer mainPeer, int channelMode)
void	initDirectoryPeerHello() Initialise hello process for directory service peer
void	initDirectoryPeerHello(DirectoryServicePeer dsp) Initialise hello process for directory service peer.
void	initPeerHello(Peer peer) Send hello message to discover other peers.

Methods inherited from class java.lang.Object

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

Method Detail

getInstance

public static HEP getInstance(AutoMedPeer mainPeer,
                              int channelMode)

initPeerHello

public void initPeerHello(Peer peer)
                   throws CommunicationException,
                          AutoMedException

Send hello message to discover other peers. This method is invoked by normal peers.

Throws:

CommunicationException

AutoMedException

initDirectoryPeerHello

public void initDirectoryPeerHello()
                            throws CommunicationException,
                                   AutoMedException

Initialise hello process for directory service peer

Throws:

CommunicationException

AutoMedException

initDirectoryPeerHello

public void initDirectoryPeerHello(DirectoryServicePeer dsp)
                            throws CommunicationException,
                                   AutoMedException

Initialise hello process for directory service peer. This method is used when both the peer and the dsp are running in the same application.

Throws:

CommunicationException

AutoMedException