[jira] [Created] (FLINK-3777) Add open and close methods to manage IF lifecycle

[Shang Yuanchun (Jira)]

Flavio Pompermaier created FLINK-3777:
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             Summary: Add open and close methods to manage IF lifecycle
                 Key: FLINK-3777
                 URL: https://issues.apache.org/jira/browse/FLINK-3777
             Project: Flink
          Issue Type: Sub-task
          Components: Core
    Affects Versions: 1.0.1
            Reporter: Flavio Pompermaier


At the moment the opening and closing of an inputFormat are not managed, although open() could be (improperly IMHO) simulated by configure().
This limits the possibility to reuse expensive resources (like database connections) and manage their release.

Probably the best option would be to add 2 methods (i.e. openInputformat() and closeInputFormat() ) to RichInputFormat*

* NOTE: the best option from a "semantic" point of view would be to rename the current open() and close() to openSplit() and closeSplit() respectively while using open() and close() methods for the IF lifecycle management, but this would cause a backward compatibility issue...



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