Make ChangeStreamOptionsBuilder support startAtOperationTime [DATAMONGO-2607]

[spring-projects-issues]

Johan Haleby opened DATAMONGO-2607 and commented

Newer versions of the MongoDB java driver (and server) supports "startAtOperationTime" for change streams (https://docs.mongodb.com/manual/changeStreams/) to be able to resume a change stream even after an "invalidate" event. But the ChangeStreamOptionsBuilder currently only allows specifying "resumeAt" and not "startAtOperationTime" which prohibits this use case. In the application I'm developing this is really important but I cannot find a workaround when using Spring Data MongoDB. 

It would be great if this could be supported by Spring Data MongoDB as well

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Affects: 3.1 M1 (2020.0.0), 3.0.2 (Neumann SR2)

Reference URL: https://stackoverflow.com/questions/55184492/difference-between-resumeafter-and-startatoperationtime-in-mongodb-change-stream

[johanhaleby]

Anything I can do to help?

[christophstrobl]

@johanhaleby If you have some time, a PR would be welcome :)

[tudormarc]

@christophstrobl can I make a PR for it? Asking because nothing happened to it from Feb 2021

[christophstrobl]

@tudormarc a PR would be welcome :)

[tudormarc]

@christophstrobl PR submitted :)

[mp911de]

After having a look, we already support setting startAtOperationTime via ChangeStreamOptions.resumeAt(…). Depending on the presence of a resume token, we either set resumeAfter or startAfter. I'm wondering what's missing as we already set all of these options and the pull request #4071 isn't setting any of the mentioned options on the Mongo ChangeStreamIterable or ChangeStreamPublisher.