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## 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 3613 2007-02-15 14:45:14Z jstewart $
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
`int` | `MAINTENANCE_INTERVAL` The amount of time to wait between replications
`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

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 can return null if the range can't be determined
`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

### MAINTENANCE_INTERVAL

    public final int MAINTENANCE_INTERVAL

  The amount of time to wait between replications

### MAX_KEYS_IN_MESSAGE

    public final int MAX_KEYS_IN_MESSAGE

  The maximum number of keys to return in one message

### endpoint

    protected Endpoint endpoint

  this application's endpoint

### 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

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

Method Detail

### 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
  Returns:
    The merge, a+b

### getTotalRange

    protected IdRange getTotalRange()

  Returns the range for which the local node is an i root, where i can range between 0 and replicationFactor can return null if the range can't be determined

  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

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