edu.umass.cs.reconfiguration.deprecated

Class AbstractReplicaCoordinatorPersistent<NodeIDType>

java.lang.Object

edu.umass.cs.reconfiguration.AbstractReplicaCoordinator<NodeIDType>

edu.umass.cs.reconfiguration.deprecated.AbstractReplicaCoordinatorPersistent<NodeIDType>

Type Parameters:

NodeIDType - FIXME: a hack(?) to use paxos just for persistent record keeping of epoch related info at a replica coordinator. What is really needed here is just a DB, but paxos provides similar features, so it is handy to use even when the consensus part of it is not really needed. When the concrete replica coordinator does need paxos, it can conveniently just use this paxos manager. This class is incomplete and may get deprecated.

All Implemented Interfaces:

Application, AppRequestParser, AppRequestParserBytes, Replicable, Reconfigurable, ReplicaCoordinator<NodeIDType>, Repliconfigurable

public abstract class AbstractReplicaCoordinatorPersistent<NodeIDType>
extends AbstractReplicaCoordinator<NodeIDType>

Author:

arun

Field Summary

Fields inherited from class edu.umass.cs.reconfiguration.AbstractReplicaCoordinator

app, messenger

Constructor Summary

Constructors

Constructor and Description
AbstractReplicaCoordinatorPersistent(Replicable app, JSONMessenger<NodeIDType> messenger, Stringifiable<NodeIDType> unstringer)

Method Summary

Modifier and Type	Method and Description
boolean	createReplicaGroup(java.lang.String serviceName, int epoch, java.lang.String state, java.util.Set<NodeIDType> nodes) This method should return true if the replica group is successfully created or one already exists with the same set of nodes.
boolean	deleteReplicaGroup(java.lang.String serviceName, int epoch) This method should result in all state corresponding to serviceName being deleted
protected PaxosManager<NodeIDType>	getPaxosManager()
java.util.Set<NodeIDType>	getReplicaGroup(java.lang.String serviceName) This method must return the replica group that was most recently successfully created for the serviceName using createReplicaGroup.

Methods inherited from class edu.umass.cs.reconfiguration.AbstractReplicaCoordinator

callCallback, checkpoint, coordinateRequest, createReplicaGroup, deleteFinalState, execute, execute, execute, getAppRequestTypes, getARARNodesAsString, getARRCNodesAsString, getCallback, getCoordinatorRequestTypes, getEpoch, getFinalState, getMessenger, getMutualAuthAppRequestTypes, getMyID, getRequest, getRequest, getRequest, getStopRequest, handleIncoming, hasLargeCheckpoints, putInitialState, registerCoordination, restore, sendAllLazy, setCallback, setLargeCheckpoints, setMessenger, setStopCallback, stop

Methods inherited from class java.lang.Object

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

Methods inherited from interface edu.umass.cs.gigapaxos.interfaces.AppRequestParser

getMutualAuthRequestTypes, getRequestTypes, getServerAuthRequestTypes

Constructor Detail

AbstractReplicaCoordinatorPersistent

public AbstractReplicaCoordinatorPersistent(Replicable app,
                                            JSONMessenger<NodeIDType> messenger,
                                            Stringifiable<NodeIDType> unstringer)

Method Detail

getPaxosManager

protected PaxosManager<NodeIDType> getPaxosManager()

createReplicaGroup

public boolean createReplicaGroup(java.lang.String serviceName,
                                  int epoch,
                                  java.lang.String state,
                                  java.util.Set<NodeIDType> nodes)

Description copied from interface: ReplicaCoordinator

This method should return true if the replica group is successfully created or one already exists with the same set of nodes. It should return false otherwise.

Specified by:

createReplicaGroup in interface ReplicaCoordinator<NodeIDType>

Specified by:

createReplicaGroup in class AbstractReplicaCoordinator<NodeIDType>

Returns:

True if created successfully.

deleteReplicaGroup

public boolean deleteReplicaGroup(java.lang.String serviceName,
                                  int epoch)

Description copied from interface: ReplicaCoordinator

This method should result in all state corresponding to serviceName being deleted

Specified by:

deleteReplicaGroup in interface ReplicaCoordinator<NodeIDType>

Specified by:

deleteReplicaGroup in class AbstractReplicaCoordinator<NodeIDType>

Returns:

True if deleted without errors.

getReplicaGroup

public java.util.Set<NodeIDType> getReplicaGroup(java.lang.String serviceName)

Description copied from interface: ReplicaCoordinator

This method must return the replica group that was most recently successfully created for the serviceName using createReplicaGroup.

Specified by:

getReplicaGroup in interface ReplicaCoordinator<NodeIDType>

Specified by:

getReplicaGroup in class AbstractReplicaCoordinator<NodeIDType>

Returns:

Set of nodes in the replica group for serviceName.