[jira] [Created] (FLINK-19799) Make FileSource extensible

[Shang Yuanchun (Jira)]

Stephan Ewen created FLINK-19799:
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             Summary: Make FileSource extensible
                 Key: FLINK-19799
                 URL: https://issues.apache.org/jira/browse/FLINK-19799
             Project: Flink
          Issue Type: Improvement
          Components: Connectors / FileSystem
            Reporter: Stephan Ewen
            Assignee: Stephan Ewen
             Fix For: 1.12.0


The File System Source currently assumes all formats can represent their work units as {{FileSourceSplit}}. If that is not the case, the formats cannot be implemented using the {{FileSource}}.

We need to support extending the splits to carry additional information in the splits, and to use that information when creating bulk readers and handling split state.  



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