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https://issues.apache.org/jira/browse/BEAM-2639?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16676611#comment-16676611
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Alex Van Boxel commented on BEAM-2639:
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Sorry I didn't progress on this one (tried on 3.6). I think it's important to
set Mongo 4.0 as a minimum for this feature (because before 4.0 you can't
resume at a certain point)
> Unbounded Source for MongoDB
> ----------------------------
>
> Key: BEAM-2639
> URL: https://issues.apache.org/jira/browse/BEAM-2639
> Project: Beam
> Issue Type: Bug
> Components: io-java-mongodb
> Affects Versions: 2.0.0
> Reporter: nevi_me
> Assignee: Jean-Baptiste Onofré
> Priority: Minor
>
> The current MongoDB source is bounded, which means that we can't build
> streaming pipelines directly from MongoDB.
> MongoDB publishes changes in each collection through the oplog. Would it be
> possible to create a connector that reads the oplog to create an unbounded
> source?
> As an oplog is only available through replication, this creates that
> dependency. We would need to also consider whether a polling method (using
> the ObjectId) could be an appropriate fallback.
> Thanks
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