com.bigdata.ha.msg

Interface IHA2PhaseCommitMessage

All Superinterfaces:

IHA2PhaseCommitProtocolMessage, IHAMessage, Serializable

All Known Implementing Classes:

HA2PhaseCommitMessage

public interface IHA2PhaseCommitMessage
extends IHA2PhaseCommitProtocolMessage

Message used for commit in 2-phase commit protocol. The receiver should Commit using the root block from the corresponding prepare message. It is an error if a commit message is observed without the corresponding prepare message.

Author:

Bryan Thompson

See Also:

HACommitGlue#commit2Phase(IHACommit2PhaseMessage)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	didAllServicesPrepare() Return true iff all services voted "YES" for PREPARE.
boolean	failCommit_beforeClosingHALog() When true the COMMIT message will fail within the commit2Phase implementation.
boolean	failCommit_beforeWritingRootBlockOnJournal() When true the COMMIT message will fail within the commit2Phase implementation.
long	getCommitTime() The commit time that will be assigned to the new commit point.
boolean	isJoinedService() true iff the service was recognized as being joined with the met quorum at the time that the prepare message was prepared.

Method Detail

isJoinedService

boolean isJoinedService()

true iff the service was recognized as being joined with the met quorum at the time that the prepare message was prepared.

Note: This is used to support atomic decisions about whether or not a service was joined with the met quorum at the time that the leader decided to commit. Services that are in the pipeline and resynchronizing will either be joined or not for the purposes of a given 2-phase commit based on this flag.

getCommitTime

long getCommitTime()

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

didAllServicesPrepare

boolean didAllServicesPrepare()

Return true iff all services voted "YES" for PREPARE. When false, not all services will participate in this commit (but the commit will still be performed).

failCommit_beforeWritingRootBlockOnJournal

boolean failCommit_beforeWritingRootBlockOnJournal()

When true the COMMIT message will fail within the commit2Phase implementation. An exception will be thrown immeditely before the new root block is written onto the journal.

Note: This is for unit tests only.

failCommit_beforeClosingHALog

boolean failCommit_beforeClosingHALog()

When true the COMMIT message will fail within the commit2Phase implementation. An exception will be thrown immeditely before the closing root block is written onto the HALog file.

Note: This is for unit tests only.