[jira] [Work logged] (BEAM-10962) Multiple PubSub Source Reader

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/BEAM-10962?focusedWorklogId=493237&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-493237 ]

ASF GitHub Bot logged work on BEAM-10962:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 01/Oct/20 00:03
            Start Date: 01/Oct/20 00:03
    Worklog Time Spent: 10m 
      Work Description: boyuanzz edited a comment on pull request #12930:
URL: https://github.com/apache/beam/pull/12930#issuecomment-701708484


   Except what Cham has mentioned, another thing is current implementation of `MultipleReadFromPubSub` only can configure multiple `ReadFromPubSub` with the same attribute, like the same `with_attributes`, `timestamp_label`, `id_label`, which is not ideal. Given that `ReadPubSub` is a native transform for Dataflow, having `MultipleReadFromPubSub` seems like the only solution for now. I'm thinking we could create a `PubSubSourceDescriptor` which includes `topic`, `subscription` and other attributes. And we expose `add` API from `MultipleReadFromPubSub` to allow end users to add a new Read.


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Issue Time Tracking
-------------------

    Worklog Id:     (was: 493237)
    Time Spent: 2h 40m  (was: 2.5h)

> Multiple PubSub Source Reader 
> ------------------------------
>
>                 Key: BEAM-10962
>                 URL: https://issues.apache.org/jira/browse/BEAM-10962
>             Project: Beam
>          Issue Type: New Feature
>          Components: io-py-gcp
>            Reporter: Inigo San Jose Visiers
>            Priority: P2
>          Time Spent: 2h 40m
>  Remaining Estimate: 0h
>
> A very common use case in Dataflow / Beam is reading from multiple PubSub topics/subscriptions and flatten them out. 
> I would be nice to have a PTransform that does this without users having to built it themselves.



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