rice.p2p.replication
Class ReplicationImpl

java.lang.Object
  rice.p2p.replication.ReplicationImpl

All Implemented Interfaces:

Application, Replication

public class ReplicationImpl

extends java.lang.Object

implements Replication, Application

Version:

$Id: ReplicationImpl.java,v 1.22 2005/03/15 19:40:43 jeffh Exp $

Author:

Alan Mislove

Nested Class Summary

protected class

ReplicationImpl.BloomFilterExecutable Internal class which is an executable for creating a bloom filter

Field Summary

protected ReplicationClient	client This replication's client
protected Endpoint	endpoint this application's endpoint
protected IdFactory	factory The factory for create IdSets and IdRanges
protected NodeHandle	handle the local node handle
protected java.lang.String	instance The instance name of the replication
protected java.util.logging.Logger	log the logger which we will use
static int	MAINTENANCE_INTERVAL The amount of time to wait between replications
static int	MAX_KEYS_IN_MESSAGE The maximum number of keys to return in one message
protected ReplicationPolicy	policy This replication's policy, which allows for application-specific replication
protected int	replicationFactor The replication factor for this replication
static boolean	verbose DESCRIBE THE FIELD

Constructor Summary

ReplicationImpl(Node node, ReplicationClient client, int replicationFactor, java.lang.String instance)
Constructor

ReplicationImpl(Node node, ReplicationClient client, int replicationFactor, java.lang.String instance, ReplicationPolicy policy)
Constructor

Method Summary

void	deliver(Id id, Message message) This method is called on the application at the destination node for the given id.
boolean	forward(RouteMessage message) This method is invoked on applications when the underlying node is about to forward the given message with the provided target to the specified next hop.
protected IdRange	getTotalRange() Returns the range for which the local node is an i root, where i can range between 0 and replicationFactor
static IdSet	merge(IdFactory factory, IdSet a, IdSet b) Internal method which takes returns set A + set B, or all of the members of set A and set B.
void	replicate() This internal method sends out the request messages to all of the nodes which hold keys this node may be interested in
void	update(NodeHandle handle, boolean joined) This method is invoked to inform the application that the given node has either joined or left the neighbor set of the local node, as the set would be returned by the neighborSet call.

Methods inherited from class java.lang.Object

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

Field Detail

endpoint

protected Endpoint endpoint

this application's endpoint

log

protected java.util.logging.Logger log

the logger which we will use

handle

protected NodeHandle handle

the local node handle

factory

protected IdFactory factory

The factory for create IdSets and IdRanges

client

protected ReplicationClient client

This replication's client

policy

protected ReplicationPolicy policy

This replication's policy, which allows for application-specific replication

replicationFactor

protected int replicationFactor

The replication factor for this replication

instance

protected java.lang.String instance

The instance name of the replication

verbose

public static final boolean verbose

DESCRIBE THE FIELD

See Also:

Constant Field Values

MAINTENANCE_INTERVAL

public static int MAINTENANCE_INTERVAL

The amount of time to wait between replications

MAX_KEYS_IN_MESSAGE

public static int MAX_KEYS_IN_MESSAGE

The maximum number of keys to return in one message

Constructor Detail

ReplicationImpl

public ReplicationImpl(Node node,
                       ReplicationClient client,
                       int replicationFactor,
                       java.lang.String instance)

Constructor

Parameters:

node - The node below this Replication implementation

client - The client for this Replication

replicationFactor - The replication factor for this instance

instance - The unique instance name of this Replication

ReplicationImpl

public ReplicationImpl(Node node,
                       ReplicationClient client,
                       int replicationFactor,
                       java.lang.String instance,
                       ReplicationPolicy policy)

Constructor

Parameters:

node - The node below this Replication implementation

client - The client for this Replication

replicationFactor - The replication factor for this instance

instance - The unique instance name of this Replication

policy - DESCRIBE THE PARAMETER

Method Detail

getTotalRange

protected IdRange getTotalRange()

Returns the range for which the local node is an i root, where i can range between 0 and replicationFactor

Returns:

The *total* range

replicate

public void replicate()

This internal method sends out the request messages to all of the nodes which hold keys this node may be interested in

Specified by:

replicate in interface Replication

forward

public boolean forward(RouteMessage message)

This method is invoked on applications when the underlying node is about to forward the given message with the provided target to the specified next hop. Applications can change the contents of the message, specify a different nextHop (through re-routing), or completely terminate the message.

Specified by:

forward in interface Application

Parameters:

message - The message being sent, containing an internal message along with a destination key and nodeHandle next hop.

Returns:

Whether or not to forward the message further

deliver

public void deliver(Id id,
                    Message message)

This method is called on the application at the destination node for the given id.

Specified by:

deliver in interface Application

Parameters:

id - The destination id of the message

message - The message being sent

update

public void update(NodeHandle handle,
                   boolean joined)

This method is invoked to inform the application that the given node has either joined or left the neighbor set of the local node, as the set would be returned by the neighborSet call.

Specified by:

update in interface Application

Parameters:

handle - The handle that has joined/left

joined - Whether the node has joined or left

merge

public static IdSet merge(IdFactory factory,
                          IdSet a,
                          IdSet b)

Internal method which takes returns set A + set B, or all of the members of set A and set B.

Parameters:

a - The first set

b - The second set

factory - DESCRIBE THE PARAMETER

Returns:

The merge, a+b