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Spanner: Refactor SpannerImpl.java - #4749
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olavloite wants to merge 3 commits into
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Clean up SpannerImpl by moving inner classes to separate files and group these into logical units.
Codecov Report
@@ Coverage Diff @@## master #4749 +/- ##
=========================================
Coverage 49.62% 49.62% Complexity 22779 22779 =========================================
Files 2168 2168 Lines 214157 214157 Branches 24253 24253 =========================================
Hits 106279 106279 Misses 99559 99559 Partials 8319 8319Continue to review full report at Codecov.
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olavloite
commented
Apr 1, 2019
| @@ -401,18 +326,9 @@ Object value() { | |||
| return ImmutableMap.copyOf(tmp); | |||
| } | |||
| private static <T extends Message> T unpack(Any response, Class<T> clazz) | |||
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This method was removed as it turned out that it was never used.
olavloite
marked this pull request as ready for review
April 1, 2019 09:07
olavloite
commented
Apr 12, 2019
ContributorAuthor
Replaced by separate PR's per change set. |
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SpannerImpl has become quite long and difficult to read. This PR splits it into a number of logical parts.
The following new files have been added as a result of splitting SpannerImpl (all classes defined at top-level of these files are package-private):
AbstractReadContext.java: Contains the abstract base class of allcom.google.cloud.spanner.ReadContextimplementations, as well as all concrete implementations of read-onlyReadContexts. Read-write transactions, that also implementReadContext, are not included in this file.AbstractResultSet.java: Contains the abstract base class forResultSetimplementations and the concrete implementation ofGrpcResultSet(theResultSetreturned by database queries on Spanner).DatabaseAdminClientImpl.java: The concrete implementation ofDatabaseAdminClient. Used to be an inner class ofSpannerImpl.InstanceAdminClientImpl.java: The concrete implementation ofInstanceAdminClient. Used to be an inner class ofSpannerImpl.PartitionedDmlTransaction.java: Implementation of partitioned DML transactions for Spanner. Used to be an inner class ofSpannerImpl.SessionImpl.java: Implementation ofSession. Used to be an inner class ofSpannerImpl.TransactionRunnerImpl.java: Implemenation ofTransactionRunnerandTransactionContext.TransactionContextis also an implementation ofReadContextand a subclass ofAbstractReadContext, but defined in this file as it is only used by 'TransactionRunnerImpl. Used to be an inner class ofSpannerImpl`.As a result of the above, SpannerImpl is reduced from more than 3,000 lines of code to approx 360 lines of code.
Changes to other files are a result of updated references (i.e. no longer referencing
SpannerImpl.SessionImplbutSessionImpl), the need to pass in a reference to SpannerImpl or SpannerGrpc, the need to change private inner classes into package-private inner classes or the need to change private methods and final fields in SpannerImpl into package-private methods and final fields.