infoservice.agreement.paxos
Class PaxosInstance

java.lang.Object
  infoservice.agreement.paxos.PaxosObject
      infoservice.agreement.paxos.PaxosInstance

Direct Known Subclasses:

InfoServicePaxosInstance

public class PaxosInstance
extends PaxosObject

Field Summary

private PaxosAcceptor	m_acceptor The PaxosAcceptor to which this instance belongs
private java.util.Hashtable	m_decissions A hashtable containing the decissions of this instance, execution-id mapped to decission
protected java.util.Hashtable	m_executions A hashtable containing all executions which belong to this instance
private java.lang.String	m_instanceNumber The identifier of this instance.
private boolean	m_notified

Constructor Summary

PaxosInstance(PaxosAcceptor a_acceptor, java.lang.String a_instanceNumber)
Creates a new PaxosInstance for the given PaxosAcceptor and the given instance number

Method Summary

void	addDecision(java.lang.String a_initiator, java.lang.String a_value) Adds the decission for the given initiator
PaxosAcceptor	getAcceptor() Returns the PaxosAcceptor this instance belongs to
java.util.Hashtable	getDecissions() Returns a hashtable containing the decissions of this instance.
PaxosExecution	getExecution(PaxosMessage a_msg) Returns the PaxosExecution atching the given message
java.util.Hashtable	getExecutions() Returns a Hashtable containing all Executions of this round
java.lang.String	getInstanceNumber() Returns the round number of this round

Methods inherited from class infoservice.agreement.paxos.PaxosObject

debug, error, fatal, getLog, info, setLog

Methods inherited from class java.lang.Object

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

Field Detail

m_decissions

private java.util.Hashtable m_decissions

A hashtable containing the decissions of this instance, execution-id mapped to decission

m_executions

protected java.util.Hashtable m_executions

A hashtable containing all executions which belong to this instance

m_instanceNumber

private java.lang.String m_instanceNumber

The identifier of this instance.

m_acceptor

private PaxosAcceptor m_acceptor

The PaxosAcceptor to which this instance belongs

m_notified

private boolean m_notified

Constructor Detail

PaxosInstance

public PaxosInstance(PaxosAcceptor a_acceptor,
                     java.lang.String a_instanceNumber)

Creates a new PaxosInstance for the given PaxosAcceptor and the given instance number

Parameters:

a_acceptor - The PaxosAcceptor to which this instance belongs

a_instanceNumber - The unique instance number

Method Detail

getAcceptor

public PaxosAcceptor getAcceptor()

Returns the PaxosAcceptor this instance belongs to

Returns:

getExecution

public PaxosExecution getExecution(PaxosMessage a_msg)

Returns the PaxosExecution atching the given message

Parameters:

a_msg - A message

Returns:

The exectution the message belongs to

getDecissions

public java.util.Hashtable getDecissions()

Returns a hashtable containing the decissions of this instance. Key is the ID of the PaxosTarget, value is the decission for this PaxosTarget

Returns:

A Hashtable with the decissions

getExecutions

public java.util.Hashtable getExecutions()

Returns a Hashtable containing all Executions of this round

Returns:

getInstanceNumber

public java.lang.String getInstanceNumber()

Returns the round number of this round

Returns:

The round number of this round

addDecision

public void addDecision(java.lang.String a_initiator,
                        java.lang.String a_value)

Adds the decission for the given initiator

Parameters:

a_initiator - The decission for the execution of this initiator will be set

a_value - The reached decission