rice.pastry.standard
Class PeriodicLeafSetProtocol

java.lang.Object
  rice.pastry.client.PastryAppl
      rice.pastry.standard.PeriodicLeafSetProtocol

All Implemented Interfaces:

MessageReceiver

public class PeriodicLeafSetProtocol

extends PastryAppl

An implementation of a periodic-style leafset protocol

Version:

$Id: PeriodicLeafSetProtocol.java 2862 2005-12-20 10:09:37Z jeffh $

Author:

Alan Mislove

Field Summary

int	CHECK_LIVENESS_PERIOD
protected Credentials	cred
protected java.util.WeakHashMap	lastTimeReceivedBLS NodeHandle -> Long remembers the TIME when we received a BLS from that NodeHandle
protected LeafSet	leafSet
protected NodeHandle	localHandle
protected PastryNode	localNode
int	PING_NEIGHBOR_PERIOD Related to rapidly determining direct neighbor liveness.
protected RoutingTable	routeTable
protected PastrySecurityManager	security

Fields inherited from class rice.pastry.client.PastryAppl

address, instance, logger, thePastryNode

Constructor Summary

PeriodicLeafSetProtocol(PastryNode ln, NodeHandle local, PastrySecurityManager sm, LeafSet ls, RoutingTable rt)
Builds a periodic leafset protocol

Method Summary

protected void	broadcastAll() Broadcast the leaf set to all members of the local leaf set.
boolean	deliverWhenNotReady() We always want to receive messages.
void	destroy() Called when PastryNode is destroyed.
Address	getAddress() Get address.
Credentials	getCredentials() Returns the credentials of this application.
void	messageForAppl(Message msg) Should not be called becasue we are overriding the receiveMessage() interface anyway.
void	receiveMessage(Message msg) Receives messages.

Methods inherited from class rice.pastry.client.PastryAppl

enrouteMessage, getLeafSet, getNodeHandle, getNodeId, getRoutingTable, isClosest, leafSetChange, notifyReady, register, registerReceiver, routeMsg, routeMsgDirect, routeSetChange, sendMessage

Methods inherited from class java.lang.Object

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

Field Detail

localHandle

protected NodeHandle localHandle

localNode

protected PastryNode localNode

security

protected PastrySecurityManager security

leafSet

protected LeafSet leafSet

routeTable

protected RoutingTable routeTable

lastTimeReceivedBLS

protected java.util.WeakHashMap lastTimeReceivedBLS

NodeHandle -> Long remembers the TIME when we received a BLS from that NodeHandle

PING_NEIGHBOR_PERIOD

public final int PING_NEIGHBOR_PERIOD

Related to rapidly determining direct neighbor liveness.

CHECK_LIVENESS_PERIOD

public final int CHECK_LIVENESS_PERIOD

cred

protected Credentials cred

Constructor Detail

PeriodicLeafSetProtocol

public PeriodicLeafSetProtocol(PastryNode ln,
                               NodeHandle local,
                               PastrySecurityManager sm,
                               LeafSet ls,
                               RoutingTable rt)

Builds a periodic leafset protocol

Method Detail

receiveMessage

public void receiveMessage(Message msg)

Receives messages.

Specified by:

receiveMessage in interface MessageReceiver

Overrides:

receiveMessage in class PastryAppl

Parameters:

msg - the message.

broadcastAll

protected void broadcastAll()

Broadcast the leaf set to all members of the local leaf set.

Parameters:

type - the type of broadcast message used

messageForAppl

public void messageForAppl(Message msg)

Should not be called becasue we are overriding the receiveMessage() interface anyway.

Specified by:

messageForAppl in class PastryAppl

Parameters:

msg - the message that is arriving.

getCredentials

public Credentials getCredentials()

Description copied from class: PastryAppl

Returns the credentials of this application.

Specified by:

getCredentials in class PastryAppl

Returns:

the credentials.

getAddress

public Address getAddress()

Get address.

Overrides:

getAddress in class PastryAppl

Returns:

gets the address.

deliverWhenNotReady

public boolean deliverWhenNotReady()

We always want to receive messages.

Overrides:

deliverWhenNotReady in class PastryAppl

Returns:

false unless the node is a service

destroy

public void destroy()

Description copied from class: PastryAppl

Called when PastryNode is destroyed. Can be overloaded by applications.

Overrides:

destroy in class PastryAppl