Pierre Villard created NIFI-2794:

             Summary: Expose a getOneFromEachConnection method in ProcessSession
                 Key: NIFI-2794
                 URL: https://issues.apache.org/jira/browse/NIFI-2794
             Project: Apache NiFi
          Issue Type: Improvement
          Components: Core Framework
    Affects Versions: 1.0.0
            Reporter: Pierre Villard
            Assignee: Pierre Villard
            Priority: Minor

In case a processor has multiple incoming connections, it could be interesting 
to expose a method allowing users to get exactly one flow file per incoming 
connection in a row.

That could unlock opportunities such as performing join operations on datasets.

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