Package com.bigdata.ha

This package extends com.bigdata.quorum to define local and Remote interfaces for highly available services.

See: Description

Interface Summary

Interface	Description
HACommitGlue	A Remote interface supporting a 2-phase commit protocol for the members of a highly available quorum.
HAGlue	A Remote interface for methods supporting high availability for a set of journals or data services having shared persistent state.
HAGlueBase	A Remote interface for methods supporting high availability.
HAPipelineGlue	A Remote interface supporting the write replication pipeline.
HAReadGlue	A Remote interface supporting low-level reads against persistent data from a quorum member.
HATXSGlue	RMI interface for the ITransactionService for HA.
IHAJournal	Convenience interface created in BLZG-1370 to factor out bigdata-jini artifact dependencies.
IHAPipelineResetRequest	Message requesting a pipeline reset on a service.
IHAPipelineResetResponse	Message reporting the outcome of a pipeline reset on a service.
IIndexManagerCallable<T>	Interface allows arbitrary tasks to be submitted to an HAGlue service for evaluation.
IJoinedAndNonJoinedServices	Interface providing an atomic snapshot of the services that are joined with a met quorum (and the services that are not joined with a met quorum) as of some point in the GATHER or PREPARE protocol.
QuorumCommit<S extends HACommitGlue>	A non-remote interface for a member service in a Quorum defining methods to support service the 2-phase quorum commit protocol.
QuorumPipeline<S extends HAPipelineGlue>	A non-remote interface for a member service in a Quorum defining methods to replicating writes.
QuorumRead<S extends HAReadGlue>	A non-remote interface for a member service in a Quorum defining methods to support reading on another member of the quorum.
QuorumService<S extends HAGlue>	A non-remote interface for a member service in a Quorum defining methods to support service specific high availability operations such as reading on another member of the quorum, the 2-phase quorum commit protocol, replicating writes, etc.

Class Summary

Class	Description
CommitRequest	Commit request for a 2-phase commit as coodinated by the leader (local object).
CommitResponse	Response for a 2-phase commit.
FutureTaskInvariantMon<T>	A Future that allows you to cancel a computation if an invariant is violated.
HAPipelineResetRequest
HAPipelineResetResponse
IndexManagerCallable<T>
JoinedAndNonJoinedServices	Helper class finds all joined and non-joined services for the quorum client.
PrepareRequest	A 2-phase request as coordinated by the leader (local object).
PrepareResponse	The 2-phase prepare outcome as coordinated by the leader.
QuorumCommitImpl<S extends HACommitGlue>	QuorumCommit implementation.
QuorumPipelineImpl<S extends HAPipelineGlue>	QuorumPipeline implementation.
QuorumReadImpl<S extends HAReadGlue>	QuorumRead implementation.
QuorumServiceBase<S extends HAGlue,L extends AbstractJournal>	Abstract implementation provides the logic for distributing messages for the quorum 2-phase commit protocol, failover reads, etc.
TestAll	Runs all tests for all journal implementations.

Enum Summary

Enum	Description
HAStatusEnum	An enumeration of HA status values.
RunState	Service run state enumeration.

Package com.bigdata.ha Description

This package extends com.bigdata.quorum to define local and Remote interfaces for highly available services. Those interfaces provide for write replication, low-level reads on quorum members, a 2-phase quorum commit protocol, synchronization of the persistent state of services which need to join a quorum, etc.