com.bigdata.ha.msg

Interface IHAGatherReleaseTimeRequest

All Superinterfaces:

IHAMessage, Serializable

All Known Implementing Classes:

HAGatherReleaseTimeRequest

public interface IHAGatherReleaseTimeRequest
extends IHAMessage

Message used to request information about the earliest commit point that is pinned on a follower. This is used by the leader to make a decision about the new release time for the replication cluster. The message causes the follower to send an IHANotifyReleaseTimeRequest back to the leader. That message is sent from within the thread on the follower that is handling the RMI for the IHAGatherReleaseTimeRequest in order to synchronize the protocol across the leader and the followers.

Author:

Bryan Thompson

Method Summary

Methods

Modifier and Type	Method and Description
UUID	getLeaderId() The UUID of the leader.
long	getNewCommitCounter() The commit counter that will be assigned to the new commit point.
long	getNewCommitTime() The commit time that will be assigned to the new commit point.
long	getTimestampOnLeader() A timestamp on the leader at the start of the protocol used to agree on the new release time (this can be the commitTime that will be assigned by the leader to the new commit point).
long	token() The token for which this request is valid.

Method Detail

token

long token()

The token for which this request is valid.

getTimestampOnLeader

long getTimestampOnLeader()

A timestamp on the leader at the start of the protocol used to agree on the new release time (this can be the commitTime that will be assigned by the leader to the new commit point). This is used to detect problems where the clocks are not synchronized on the services.

getLeaderId

UUID getLeaderId()

The UUID of the leader. This may be used to discover the service that is (or was) the leader even if the token has been invalidated.

getNewCommitCounter

long getNewCommitCounter()

The commit counter that will be assigned to the new commit point.

getNewCommitTime

long getNewCommitTime()

The commit time that will be assigned to the new commit point.