rice.pastry.socket
Class SocketSourceRouteManager

java.lang.Object
  rice.pastry.socket.SocketSourceRouteManager

public class SocketSourceRouteManager

extends java.lang.Object

Class which keeps track of the best routes to remote nodes. This class is also therefore in charge of declaring node death and liveness.

Version:

$Id: SocketSourceRouteManager.java,v 1.15 2005/05/10 20:53:51 amislove Exp $

Author:

Alan Mislove

Nested Class Summary

protected class

SocketSourceRouteManager.AddressManager Internal class which is tasked with maintaining the status of a single remote address.

Field Summary

static long	CHECK_DEAD_THROTTLE DESCRIBE THE FIELD
static long	PING_THROTTLE DESCRIBE THE FIELD

Constructor Summary

protected

SocketSourceRouteManager(SocketPastryNode node, SocketNodeHandlePool pool, EpochInetSocketAddress bindAddress, EpochInetSocketAddress proxyAddress) Constructor

Method Summary

void	bootstrap(EpochInetSocketAddress address, Message message) Method which sends a bootstrap message across the wire.
void	checkLiveness(EpochInetSocketAddress address) Method which FORCES a check of liveness of the remote node.
protected SocketSourceRouteManager.AddressManager	getAddressManager(EpochInetSocketAddress address, boolean search) Internal method which returns (or builds) the manager associated with an address
protected SourceRoute[]	getAllRoutes(EpochInetSocketAddress destination) Internal method which returns a list of all possible routes to a given address.
java.util.HashMap	getBest() Gets the Best attribute of the SocketSourceRouteManager object
protected SourceRoute	getBestRoute(EpochInetSocketAddress address) Internal method which returns the best known route to the given destination
int	getLiveness(EpochInetSocketAddress address) Method which returns the last cached liveness value for the given address.
SocketCollectionManager	getManager() Method which returns the internal manager
protected void	markAlive(SourceRoute route) This method should be called when a known route is declared alive.
protected void	markDead(EpochInetSocketAddress address) This method should be called when a known node is declared dead - this is ONLY called when a new epoch of that node is detected.
protected void	markDead(SourceRoute route) This method should be called when a known route is declared dead.
protected void	markProximity(SourceRoute route, int proximity) This method should be called when a known route has its proximity updated
protected void	markSuspected(SourceRoute route) This method should be called when a known route is declared suspected.
void	ping(EpochInetSocketAddress address) Method which suggests a ping to the remote node.
int	proximity(EpochInetSocketAddress address) Method which returns the last cached proximity value for the given address.
protected void	reroute(EpochInetSocketAddress address, Message m) Reroutes the given message.
void	resign() Makes this node resign from the network.
void	send(EpochInetSocketAddress address, Message message) Method which sends a message across the wire.

Methods inherited from class java.lang.Object

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

Field Detail

CHECK_DEAD_THROTTLE

public static long CHECK_DEAD_THROTTLE

DESCRIBE THE FIELD

PING_THROTTLE

public static long PING_THROTTLE

DESCRIBE THE FIELD

Constructor Detail

SocketSourceRouteManager

protected SocketSourceRouteManager(SocketPastryNode node,
                                   SocketNodeHandlePool pool,
                                   EpochInetSocketAddress bindAddress,
                                   EpochInetSocketAddress proxyAddress)

Constructor

Parameters:

node - The local node

pool - The node hanlde pool

bindAddress - The address which the node should bind to

proxyAddress - The address which the node should advertise as it's address

Method Detail

getBest

public java.util.HashMap getBest()

Gets the Best attribute of the SocketSourceRouteManager object

Returns:

The Best value

getManager

public SocketCollectionManager getManager()

Method which returns the internal manager

Returns:

The internal manager

getAddressManager

protected SocketSourceRouteManager.AddressManager getAddressManager(EpochInetSocketAddress address,
                                                                    boolean search)

Internal method which returns (or builds) the manager associated with an address

Parameters:

address - The remote address

search - DESCRIBE THE PARAMETER

Returns:

The AddressManager value

getLiveness

public int getLiveness(EpochInetSocketAddress address)

Method which returns the last cached liveness value for the given address. If there is no cached value, then LIVENESS_ALIVE

Parameters:

address - The address to return the value for

Returns:

The liveness value

getAllRoutes

protected SourceRoute[] getAllRoutes(EpochInetSocketAddress destination)

Internal method which returns a list of all possible routes to a given address. Currently, this method simply sees if any of the leafset members are able to reach the node.

Parameters:

destination - DESCRIBE THE PARAMETER

Returns:

All possible source routes to the destination

getBestRoute

protected SourceRoute getBestRoute(EpochInetSocketAddress address)

Internal method which returns the best known route to the given destination

Parameters:

address - The address

Returns:

The BestRoute value

resign

public void resign()
            throws java.io.IOException

Makes this node resign from the network. Is designed to be used for debugging and testing.

Throws:

java.io.IOException - DESCRIBE THE EXCEPTION

bootstrap

public void bootstrap(EpochInetSocketAddress address,
                      Message message)

Method which sends a bootstrap message across the wire.

Parameters:

message - The message to send

address - The address to send the message to

send

public void send(EpochInetSocketAddress address,
                 Message message)

Method which sends a message across the wire.

Parameters:

message - The message to send

address - The address to send the message to

ping

public void ping(EpochInetSocketAddress address)

Method which suggests a ping to the remote node.

Parameters:

address - DESCRIBE THE PARAMETER

checkLiveness

public void checkLiveness(EpochInetSocketAddress address)

Method which FORCES a check of liveness of the remote node. Note that this method should ONLY be called by internal Pastry maintenance algorithms - this is NOT to be used by applications. Doing so will likely cause a blowup of liveness traffic.

Parameters:

address - DESCRIBE THE PARAMETER

proximity

public int proximity(EpochInetSocketAddress address)

Method which returns the last cached proximity value for the given address. If there is no cached value, then DEFAULT_PROXIMITY is returned.

Parameters:

address - The address to return the value for

Returns:

The ping value to the remote address

markDead

protected void markDead(SourceRoute route)

This method should be called when a known route is declared dead.

Parameters:

route - The now-dead route

markDead

protected void markDead(EpochInetSocketAddress address)

This method should be called when a known node is declared dead - this is ONLY called when a new epoch of that node is detected. Note that this method is silent - no checks are done. Caveat emptor.

Parameters:

address - The now-dead address

markAlive

protected void markAlive(SourceRoute route)

This method should be called when a known route is declared alive.

Parameters:

route - The now-live route

markSuspected

protected void markSuspected(SourceRoute route)

This method should be called when a known route is declared suspected.

Parameters:

route - The now-live route

markProximity

protected void markProximity(SourceRoute route,
                             int proximity)

This method should be called when a known route has its proximity updated

Parameters:

route - The route

proximity - The proximity

reroute

protected void reroute(EpochInetSocketAddress address,
                       Message m)

Reroutes the given message. If this node is alive, send() is called. If this node is not alive and the message is a route message, it is rerouted. Otherwise, the message is dropped.

Parameters:

m - The message

address - The address of the remote node