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From "JongHyok Lee (JIRA)" <>
Subject [jira] [Created] (GEARPUMP-27) Dynamic DAG modification API
Date Tue, 12 Apr 2016 06:38:25 GMT
JongHyok Lee created GEARPUMP-27:

             Summary: Dynamic DAG modification API
                 Key: GEARPUMP-27
             Project: Apache Gearpump
          Issue Type: Improvement
            Reporter: JongHyok Lee

Dynamic modification of running DAG through API needed to support other application utilize
Gearpump as a real stream processing 'engine', because most of business application has it's
own UI's and modification of running DAG issued from business application not by developer
or Gearpump admin.

It's same for me. I'm developing business application with it's own UI but has requirements
of dynamic change of DAG.

My current approach is to dynamically generate akka streams based class (with connection information)
and load it using loadClass. But if gearpump provides those kind of APIs, it might be very

The use case might user change processing logic of data stream by selecting an item from combo
box of my UI, and my application dynamically compose new logic and pass the compiled jar (or
just source code) to the API which gearpump provides.

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