net.tomp2p.replication

Class Replication

java.lang.Object

net.tomp2p.replication.Replication

All Implemented Interfaces:

ReplicationListener, PeerMapChangeListener

public class Replication
extends Object
implements PeerMapChangeListener, ReplicationListener

This class has 3 methods that are called from outside eventes: check, peerInsert, peerRemoved.

Constructor Summary

Constructors

Constructor and Description
Replication(StorageLayer backend, PeerAddress selfAddress, PeerMap peerMap, int replicationFactor, boolean nRoot, boolean keepData) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
void	addResponsibilityListener(ResponsibilityListener responsibilityListener) Add responsibility listener.
void	dataInserted(Number160 locationKey) Update responsibilities.
void	dataRemoved(Number160 locationKey)
boolean	is0RootReplication()
boolean	isKeepingData()
boolean	isNRootReplication()
boolean	isReplication() Checks if the user enabled replication.
void	keepData(boolean keepData)
void	nRootReplication(boolean nRootReplication)
void	peerInserted(PeerAddress peerAddress, boolean verified)
void	peerRemoved(PeerAddress peerAddress, PeerStatatistic peerStatatistic)
void	peerUpdated(PeerAddress peerAddress, PeerStatatistic peerStatatistic)
void	removeResponsibilityListener(ResponsibilityListener responsibilityListener) Remove a responsibility listener.
int	replicationFactor()
Replication	replicationFactor(int replicationFactor)

Methods inherited from class java.lang.Object

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

Constructor Detail

Replication

public Replication(StorageLayer backend,
           PeerAddress selfAddress,
           PeerMap peerMap,
           int replicationFactor,
           boolean nRoot,
           boolean keepData)

Constructor.

Parameters:

replicationStorage - The interface where we shore the replication responsibilities

selfAddress - My address to know for what my peer is responsible

peerMap - The map of my neighbors

replicationFactor - The replication factor

nRoot - true for n-root replication, false for 0-root replication

keepData - flag indicating if data will be kept in memory after loss of replication responsibility

Method Detail

replicationFactor

public Replication replicationFactor(int replicationFactor)

Returns:

The replication factor.

replicationFactor

public int replicationFactor()

Returns:

The replication factor.

nRootReplication

public void nRootReplication(boolean nRootReplication)

Parameters:

nRootReplication - flag Set true for n-root replication or false for 0-root replication.

isNRootReplication

public boolean isNRootReplication()

Returns:

true if n-root replication is enabled

is0RootReplication

public boolean is0RootReplication()

Returns:

true if 0-root replication is enabled

keepData

public void keepData(boolean keepData)

Parameters:

keepData - flag If true data will be kept in memory after loosing replication responsibility. If false data will be deleted.

isKeepingData

public boolean isKeepingData()

Returns:

true if data will keep in memory after loosing replication responsibility

isReplication

public boolean isReplication()

Checks if the user enabled replication.

Returns:

True if replication is enabled.

addResponsibilityListener

public void addResponsibilityListener(ResponsibilityListener responsibilityListener)

Add responsibility listener. If the first listener is added, replication is considered enabled.

Parameters:

responsibilityListener - The responsibility listener.

removeResponsibilityListener

public void removeResponsibilityListener(ResponsibilityListener responsibilityListener)

Remove a responsibility listener. If all responsibility listeners are removed, replication is considered disabled.

Parameters:

responsibilityListener - The responsibility listener.

dataRemoved

public void dataRemoved(Number160 locationKey)

Specified by:

dataRemoved in interface ReplicationListener

dataInserted

public void dataInserted(Number160 locationKey)

Update responsibilities. This happens for a put / add.

Specified by:

dataInserted in interface ReplicationListener

Parameters:

locationKey - The location key.

peerInserted

public void peerInserted(PeerAddress peerAddress,
                boolean verified)

Specified by:

peerInserted in interface PeerMapChangeListener

peerRemoved

public void peerRemoved(PeerAddress peerAddress,
               PeerStatatistic peerStatatistic)

Specified by:

peerRemoved in interface PeerMapChangeListener

peerUpdated

public void peerUpdated(PeerAddress peerAddress,
               PeerStatatistic peerStatatistic)

Specified by:

peerUpdated in interface PeerMapChangeListener