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From "Francis UPTON (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (BEAM-881) Provide a PTransform in IOs providing a "standard" Avro IndexedRecord
Date Wed, 02 Nov 2016 16:33:59 GMT

    [ https://issues.apache.org/jira/browse/BEAM-881?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15629499#comment-15629499
] 

Francis UPTON commented on BEAM-881:
------------------------------------

I think the issue we are trying to address here is to provide a means of having IOs and generic
Ptransforms all being able to work together without point-to-point conversions. One way to
do this is use Avro IndexRecords. However there are others. The important thing is provide
a means to get to a common interoperable format that supports hierarchical data. Without this,
all transformations between IOs and PTransform components will have to be point-to-point and
this will not scale.

> Provide a PTransform in IOs providing a "standard" Avro IndexedRecord
> ---------------------------------------------------------------------
>
>                 Key: BEAM-881
>                 URL: https://issues.apache.org/jira/browse/BEAM-881
>             Project: Beam
>          Issue Type: New Feature
>          Components: sdk-java-extensions
>            Reporter: Jean-Baptiste Onofré
>            Assignee: Jean-Baptiste Onofré
>
> Now, each IO is using a different data format. For instance, the {{JmsIO.Read}} provides
a {{PCollection}} of {{JmsRecord}} (and {{JmsIO.Write}} expects also a {{JmsRecord}}), {{KafkaIO.Read}}
provides a {{PCollection}} of {{KafkaRecord}}.
> It could appear a bit "complex" for users to manipulate such kind of data format: some
users may expect kind of standard format.
> Without modifying the existing IO, we could add a {{PTransform}} (as part of the IO)
that an user can optionally use. This transform will convert the IO data format (let say {{JmsRecord}}
for instance) to a standard Avro {{IndexedRecord}}.



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