[GitHub] sanha opened a new pull request #48: [NEMO-72] Instance-based Encoder/Decoder interface

[GitBox <gi...@apache.org>]

sanha opened a new pull request #48: [NEMO-72] Instance-based Encoder/Decoder interface
URL: https://github.com/apache/incubator-nemo/pull/48
 
 
   JIRA: [NEMO-72: Instance-based Encoder/Decoder interface](https://issues.apache.org/jira/projects/NEMO/issues/NEMO-72)
   
   **Major changes:**
   - Modify the interface of `Coder` from static fashion to instance-based fashion 
     (to avoid to generate instance-based coder such as Spark serializer for every encoding).
   - Split `Coder` into `Encoder` and `Decoder`
     (to support some use cases to separate the encoding and decoding like in [#32](https://issues.apache.org/jira/browse/NEMO-32)).
   - Split `StreamChainer` into `EncodeStreamChainer` and `DecodeStreamChainer`.
   
   **Minor changes to note:**
   - Split `CoderProperty` into `EncoderProperty` and `DecoderProperty`
   - Split `CompressionProperty` into `CompressionProperty` and `DecompressionProperty`
   
   **Tests for the changes:**
   - Existing unit tests for `Coder`, `CoderProperty`, `Compression`, `CompressionProperty`, and other data-plain side tests cover this change.
   - Existing integration tests also cover this change.
   
   **Other comments:**
   - N/A.
   
   resolves [NEMO-72](https://issues.apache.org/jira/projects/NEMO/issues/NEMO-72)
   

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