[jira] [Commented] (FALCON-327) Simplify message passing framework

["Shaik Idris Ali (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FALCON-327?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13918092#comment-13918092 ] 

Shaik Idris Ali commented on FALCON-327:
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Make sense to clean this up, also the workflow template has number of arguments, which can be parameterised as well.

JMS seems ok so far. I would prefer to crate a Message Entity class (containing args) and float this across different modules.

> Simplify message passing framework
> ----------------------------------
>
>                 Key: FALCON-327
>                 URL: https://issues.apache.org/jira/browse/FALCON-327
>             Project: Falcon
>          Issue Type: Improvement
>          Components: messaging
>    Affects Versions: 0.5
>            Reporter: Venkatesh Seetharam
>              Labels: messaging
>
> Issues with the current implementation:
> * hard to evolve the schema
> If I need to add one attribute, requires change in various places
> * Too many enum classes for the same variable
> Confuses the heck out of me.  Some small, some caps
> * FalconPostProcessing gets args, parses the args into CLI and converts 'em back into args repeatedly
> Too much redundant processing
> * Timestamp should be long as opposed to a String - minor?
> I need to compare dates and thought long is easier instead of constructing expensive SimpleDateFormats
> * Hard dependency on JMS. 
> Suggest the following:
> * Have the payload in a Map serialized as JSON
> - wonder how to pass this from oozie 
> * Have one central Enum class for the keys in the payload
> * Each class now depends on this Enum and takes what it needs from the Map
> We also could rethink about the current messaging which falcon relies on (had started a discuss thread but did not get any response):
> * Continue to use JMS
> * Switch to FS Polling
> * Use both
> Thoughts?



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