fix(app): Fix accidental polling when a query is initially disabled #17853
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mjhuff
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Mar 21, 2025
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…17832) ## Overview The client-side half of EXEC-1342. ## Test Plan and Hands on Testing * [x] I guess at this point we can turn on the feature flag and try this out by entering LPC on one client and changing offsets on another? * Tested with a merge of this PR, #17853, #17817, and #17850. ## Changelog The client was polling `POST /labwareOffsets/searches`. This switches it to only happen when the client receives a notification from the server that offsets have changed, with a polling fallback. I'm entirely cargo-culting the patterns from the existing `useNotify___()` hooks. ## Risk assessment Medium. I don't think we have a good way to integration-test this kind of thing, so there are risks of things like missed updates, or inadvertent polling.
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Overview
While testing EXEC-1342, we noticed a bug in our notifications machinery that would cause the app to poll even when MQTT was available and it shouldn't have to.
Details
Specifically, the bug would happen for queries that started off with
optionsof{enabled: false}and became{enabled: true}later on. Here is the motivating example.The
useNotifyDataReadyhook had a piece of state,isNotifyEnabled, that would accidentally permanently latch tofalsewhenever the hook saw{enabled: false}.Test Plan and Hands on Testing
Tested as part of #17832 by monitoring the network logs.
Review requests
Makes sense? Names good?
Risk assessment
Medium. This is common code for a lot of stuff, and it's hard to test.