introduce executeSubscriptionEvent #3657
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The `execute`/`executeImpl` and `createSourceEventStream`/`createSourceEventStreamImpl` functions follow the same basic pattern of building the contet and using it to run a function. This PR extracts that pattern into a separate function. For good measure, the same pattern in applied to the soon-to-be-deprecated `subscribe` function. Hheavier refactoring is on the way from @IvanGoncharov (see graphql#3639 (review)), but in the meantime, this consolidates the common pattern without any breaking changes.
...to executeSubscriptionRootField => because that's what it does!
...because that's what it does! The execution of an operation returns a map of data/errors, not just the data.
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`execute` no longer runs the query algorithm for subscription operations. Rather, subscription operations are performed, as per the spec. `subscribe` is deprecated.
to replace the old exported functionality from execute
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So we are back to square one where we duplicate work done by createSourceEventStream.
Adding a new API means we can't easily change or remove it so we need to solve the problem of duplicating work.
In #3658 I proposed exact same API but without this problem.
Merging this PR restricts design space for figuring out how to remove this duplication.
So I want to resolve the problem of duplication before merging it, so we sure API is compatible with this solution.
I think it's fair to block this change since a full alternative is provided in #3658
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I don't understand, this is for use in a separate service that is set up to only run this function to manage subscriptions, so there is duplicative work of coercing because it is done by a separate service. We have discussed already how CreateSourceEventStream is not commonly used but this is available now for those who need it. I do not see how your PR provides an alternative without this additional work if indeed run as two services. |
to replace the old exported functionality removed from execute by #3644
depends on #3644