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Posted to commits@beam.apache.org by "Luke Cwik (JIRA)" <ji...@apache.org> on 2017/06/20 15:53:00 UTC

[jira] [Created] (BEAM-2482) CodedValueMutationDetector should use the coders structural value

Luke Cwik created BEAM-2482:
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             Summary: CodedValueMutationDetector should use the coders structural value
                 Key: BEAM-2482
                 URL: https://issues.apache.org/jira/browse/BEAM-2482
             Project: Beam
          Issue Type: Improvement
          Components: runner-direct
            Reporter: Luke Cwik
            Priority: Minor


Currently the CodedValueMutationDetector[1] checks to see if the objects are Java equals and then compares whether the bytes are equal. Instead of relying on the bytes, we should rely on the coders structural value explicitly[2]. This allows for a coder to provide a fast path equality check with the default still comparing byte array representations.

1: https://github.com/apache/beam/blob/eae0d05bd7c088accd927dcfe3e511efbb11c9fd/sdks/java/core/src/main/java/org/apache/beam/sdk/util/MutationDetectors.java
2: https://github.com/apache/beam/blob/01b3f87f977d44eac23eb5488074bbc638858a9d/sdks/java/core/src/main/java/org/apache/beam/sdk/coders/Coder.java#L252





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