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fix(project-cache): Merge instead of replace project state channel in upstream #3952

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@Dav1dde Dav1dde commented Aug 27, 2024

Also described in code, while there is a request in flight we might get another request for the same project, when the response for the project is pending we replace the channel instead of merging it.

#skip-changelog

@Dav1dde Dav1dde requested a review from a team as a code owner August 27, 2024 11:47
@Dav1dde Dav1dde self-assigned this Aug 27, 2024
@Dav1dde Dav1dde force-pushed the dav1d/upstream-project-merge-channel branch from 2e3bc6b to baa1864 Compare August 27, 2024 11:48

self.other.push(channel);
self.other.extend(other);
self.deadline = self.deadline.max(deadline);
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Should this be the minimum? In theory the deadline could get bumped indefinitely here, which maybe isn't a bad thing?

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I think max is correct, matches the previous behavior more closely.

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I think min matches the previous behaviour more closely since we'd replace the newer entry with the older entry and the deadline is only computed once.

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A test case would be nice.

channel: BroadcastChannel<ProjectFetchState>,
// Additional broadcast channels tracked from merge operations.
other: Vec<BroadcastChannel<ProjectFetchState>>,
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nit: Could replace channel, other by a single SmallVec, to clarify that there is no real difference between the channels.

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I explicitly have separate fields for this to guarantee there is always at least one channel, otherwise attaching requires a dance of channels.last().is_some().or_insert().


self.other.push(channel);
self.other.extend(other);
self.deadline = self.deadline.max(deadline);
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I think max is correct, matches the previous behavior more closely.

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Dav1dde commented Aug 27, 2024

A test case would be nice.

Agreed just need to think of how to actually test this :(

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