[jira] [Created] (BEAM-553) Add a custom text source

["Chamikara Jayalath (JIRA)" <ji...@apache.org>]

Chamikara Jayalath created BEAM-553:
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             Summary: Add a custom text source
                 Key: BEAM-553
                 URL: https://issues.apache.org/jira/browse/BEAM-553
             Project: Beam
          Issue Type: New Feature
          Components: sdk-py
            Reporter: Chamikara Jayalath
            Assignee: Chamikara Jayalath


Currently, the text source implementation available for Python SDK [1] is a Dataflow native source which only works efficiently for Dataflow runner. We should add a custom text source on top of custom file-based source framework [2] so that other runner implementations can potentially use the same text source implementation.

Custom text source implementation for Java SDK is at [3].

[1] https://github.com/apache/incubator-beam/blob/python-sdk/sdks/python/apache_beam/io/fileio.py#L70
[2] https://github.com/apache/incubator-beam/blob/python-sdk/sdks/python/apache_beam/io/filebasedsource.py
[3] https://github.com/apache/incubator-beam/blob/master/sdks/java/core/src/main/java/org/apache/beam/sdk/io/TextIO.java#L745



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