lib.easyjava.net.replication.multipaxos.message

Class Promise<E extends PaxosCommand>

java.lang.Object

lib.easyjava.net.replication.multipaxos.message.PaxosMessage

lib.easyjava.net.replication.multipaxos.message.CommandMessage<E>

lib.easyjava.net.replication.multipaxos.message.Promise<E>

Type Parameters:

E - the type of command this promise holds

All Implemented Interfaces:

java.io.Serializable, PaxosMessage.Acceptance, PaxosMessage.ProposeResponse

public class Promise<E extends PaxosCommand>
extends CommandMessage<E>
implements PaxosMessage.Acceptance, PaxosMessage.ProposeResponse

A promise to another node not to accept any proposal numbers lower than what has just been received

Author:

Rob Rua (robrua@alumni.cmu.edu)

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class lib.easyjava.net.replication.multipaxos.message.PaxosMessage

PaxosMessage.Acceptance, PaxosMessage.AcceptResponse, PaxosMessage.Denial, PaxosMessage.ProposeResponse, PaxosMessage.Request

Field Summary

Fields

Modifier and Type	Field and Description
long	previousProposalNumber

Fields inherited from class lib.easyjava.net.replication.multipaxos.message.CommandMessage

command

Fields inherited from class lib.easyjava.net.replication.multipaxos.message.PaxosMessage

commandSlot, proposalNumber, sourceNodeID

Constructor Summary

Constructors

Constructor and Description
Promise(int sourceNodeID, long commandSlot, long proposalNumber, E command, long previousProposalNumber)

Method Summary

Modifier and Type	Method and Description
java.lang.String	toString()

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

previousProposalNumber

public final long previousProposalNumber

Constructor Detail

Promise

public Promise(int sourceNodeID,
               long commandSlot,
               long proposalNumber,
               E command,
               long previousProposalNumber)

Parameters:

sourceNodeID - the ID of the node sending this promise

commandSlot - the command slot this is a promise for

proposalNumber - the proposal number this is a promise for

command - the command with the highest proposal number previously seen by the source node

previousProposalNumber - the highest proposal number previously seen by the source node

Method Detail

toString

public java.lang.String toString()

Overrides:

toString in class CommandMessage<E extends PaxosCommand>