[kudu-CR] KUDU-2612: initial implementation of TxnManager

["Alexey Serbin (Code Review)" <ge...@cloudera.org>]

Hello Tidy Bot, Kudu Jenkins, Andrew Wong, Hao Hao, 

I'd like you to reexamine a change. Please visit

    http://gerrit.cloudera.org:8080/16527

to look at the new patch set (#2).

Change subject: KUDU-2612: initial implementation of TxnManager
......................................................................

KUDU-2612: initial implementation of TxnManager

This is a first implementation of the TxnManager.  The TxnManager class
encapsulates the logic used by the TxnManagerService while serving RPC
requests (see txn_manager.proto for the protobuf interface).  The most
essential piece of the logic to be implemented by this class is the
assignment of an identifier for a new transaction and initialization
of the transaction status table, along with creating of its new
partitions, when needed.  All other methods simply do proxying of
corresponding requests to the underlying instance of TxnSystemClient.

This changelist also contains test scenarios to cover the newly
introduced functionality.

The implementation of TxnManager::BeginTransaction() is moved into
a follow-up changelist by request for simplify the process of reviewing
these changes.

TxnManager::KeepTransactionAlive() will be implemented as soon
as the corresponding functionality is ready in the TxnStatusManager.

Change-Id: Ie952977a3ae5f625d1283389f0be8afb79df7d8c
---
M src/kudu/master/CMakeLists.txt
M src/kudu/master/master.cc
M src/kudu/master/master.h
A src/kudu/master/txn_manager-test.cc
A src/kudu/master/txn_manager.cc
A src/kudu/master/txn_manager.h
A src/kudu/master/txn_manager.proto
A src/kudu/master/txn_manager_service.cc
A src/kudu/master/txn_manager_service.h
M src/kudu/transactions/txn_system_client.cc
10 files changed, 1,133 insertions(+), 14 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/27/16527/2
-- 
To view, visit http://gerrit.cloudera.org:8080/16527
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Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: Ie952977a3ae5f625d1283389f0be8afb79df7d8c
Gerrit-Change-Number: 16527
Gerrit-PatchSet: 2
Gerrit-Owner: Alexey Serbin <as...@cloudera.com>
Gerrit-Reviewer: Andrew Wong <aw...@cloudera.com>
Gerrit-Reviewer: Hao Hao <ha...@cloudera.com>
Gerrit-Reviewer: Kudu Jenkins (120)
Gerrit-Reviewer: Tidy Bot (241)