Andrew Wong has submitted this change and it was merged. ( http://gerrit.cloudera.org:8080/16044 )
Change subject: KUDU-2612 p2: introduce transaction status management ...................................................................... KUDU-2612 p2: introduce transaction status management This introduces the TxnStatusManager, which is backed by the TxnStatusTablet that exposes the following APIs that will be called via RPC, and will serve as many of the building blocks for orchestrating two-phase commit: - BeginTransaction: adds a new transaction under management of the TxnStatusManager - BeginCommitTransaction: transitions the state of a transaction from OPEN to COMMIT_IN_PROGRESS - AbortTransaction: transitions the state of a transaction from OPEN or COMMIT_IN_PROGRESS to ABORTED - RegisterParticipant: adds a participant to be associated with a specific transaction ID For completeness sake w.r.t defining the transaction state's enums, the following API is also added, which will be called by the TxnStatusManager itself upon determining a transaction has been completed. - FinalizeCommitTransaction: transitions the state of a transaction from COMMIT_IN_PROGRESS to COMMITTED This new abstraction mirrors that used by the CatalogManager, which uses copy-on-write locking to protect concurrent access to metadata while writes to the underlying TabletReplica (i.e. SysCatalogTable, or in this case, TxnStatusTablet) are being replicated. This is at least enough of a jumping off point that we can begin plumbing this into the tablet servers and defining an RPC service around it -- there are still no facilities to create a TxnStatusManager. It should be noted that end-users will not call these methods directly, but rather through some layer of indirection (e.g. clients won't request a specific transaction ID, they'll just request to begin a transaction, and some intermediary layer will be in charge of getting an appropriate transaction ID). This should give us flexibility in changing the TxnStatusManager's interface moving forward. Change-Id: I371bb200cf65073ae3ac7cb311ab9a0b8344a636 Reviewed-on: http://gerrit.cloudera.org:8080/16044 Reviewed-by: Alexey Serbin <aser...@cloudera.com> Tested-by: Andrew Wong <aw...@cloudera.com> --- M src/kudu/master/catalog_manager.h M src/kudu/transactions/CMakeLists.txt A src/kudu/transactions/txn_status_entry.cc A src/kudu/transactions/txn_status_entry.h A src/kudu/transactions/txn_status_manager-test.cc A src/kudu/transactions/txn_status_manager.cc A src/kudu/transactions/txn_status_manager.h M src/kudu/util/cow_object.h 8 files changed, 1,075 insertions(+), 16 deletions(-) Approvals: Alexey Serbin: Looks good to me, approved Andrew Wong: Verified -- To view, visit http://gerrit.cloudera.org:8080/16044 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-Project: kudu Gerrit-Branch: master Gerrit-MessageType: merged Gerrit-Change-Id: I371bb200cf65073ae3ac7cb311ab9a0b8344a636 Gerrit-Change-Number: 16044 Gerrit-PatchSet: 12 Gerrit-Owner: Andrew Wong <aw...@cloudera.com> Gerrit-Reviewer: Alexey Serbin <aser...@cloudera.com> Gerrit-Reviewer: Andrew Wong <aw...@cloudera.com> Gerrit-Reviewer: Attila Bukor <abu...@apache.org> Gerrit-Reviewer: Kudu Jenkins (120) Gerrit-Reviewer: Tidy Bot (241)
