rice.pastry.standard
Class StandardLeafSetProtocol

java.lang.Object
  rice.pastry.standard.StandardLeafSetProtocol

All Implemented Interfaces:

MessageReceiver

public class StandardLeafSetProtocol

extends java.lang.Object

implements MessageReceiver

An implementation of a simple leaf set protocol.

Version:

$Id: StandardLeafSetProtocol.java 3038 2006-02-07 10:01:01Z jeffh $

Author:

Peter Druschel, Andrew Ladd

Field Summary

protected boolean	failstop
protected LeafSet	leafSet
protected NodeHandle	localHandle
protected PastryNode	localNode
protected Logger	logger
protected RoutingTable	routeTable
protected PastrySecurityManager	security

Constructor Summary

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

Method Summary

protected void	broadcast() Broadcast the leaf set to all members of the local leaf set.
protected void	broadcast(int type) Broadcast the leaf set to all members of the local leaf set.
protected void	broadcast(LeafSet ls, NodeHandle from) Broadcast the local leaf set to all members of the given leaf set, plus the node from which the leaf set was received.
protected boolean	checkLeafSet(LeafSet remotels, NodeHandle from, boolean notifyMissing) Checks a received leafset advertisement for missing nodes
Address	getAddress() Gets the address.
void	maintainLeafSet() Maintain the leaf set.
protected boolean	mergeLeafSet(LeafSet remotels, NodeHandle from) Merge a remote leafset into our own
void	receiveMessage(Message msg) Receives messages.

Methods inherited from class java.lang.Object

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

Field Detail

failstop

protected final boolean failstop

See Also:

Constant Field Values

localHandle

protected NodeHandle localHandle

localNode

protected PastryNode localNode

security

protected PastrySecurityManager security

leafSet

protected LeafSet leafSet

routeTable

protected RoutingTable routeTable

logger

protected Logger logger

Constructor Detail

StandardLeafSetProtocol

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

Method Detail

getAddress

public Address getAddress()

Gets the address.

Returns:

the address.

receiveMessage

public void receiveMessage(Message msg)

Receives messages.

Specified by:

receiveMessage in interface MessageReceiver

Parameters:

msg - the message.

checkLeafSet

protected boolean checkLeafSet(LeafSet remotels,
                               NodeHandle from,
                               boolean notifyMissing)

Checks a received leafset advertisement for missing nodes

Parameters:

remotels - the remote leafset

from - the node from which we received the leafset

notifyMissing - if true, notify missing nodes

Returns:

true if any nodes where found missing in the received leafset

mergeLeafSet

protected boolean mergeLeafSet(LeafSet remotels,
                               NodeHandle from)

Merge a remote leafset into our own

Parameters:

remotels - the remote leafset

from - the node from which we received the leafset

Returns:

true if the leafset changed

broadcast

protected void broadcast()

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

broadcast

protected void broadcast(int type)

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

Parameters:

type - the type of broadcast message used

broadcast

protected void broadcast(LeafSet ls,
                         NodeHandle from)

Broadcast the local leaf set to all members of the given leaf set, plus the node from which the leaf set was received.

Parameters:

ls - the leafset whose members we send to local leaf set

from - the node from which ls was received

maintainLeafSet

public void maintainLeafSet()

Maintain the leaf set. This method checks for dead leafset entries and replaces them as needed. It is assumed that this method be invoked periodically.