Ensure there is only 1 subscription in PushTrigger #238
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calvin681
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Andyz26,
codyrioux,
fdc-ntflx,
hmitnflx,
jeffchao,
liuml07,
markcho,
nickmahilani,
piygoyal and
sundargates
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hmitnflx
approved these changes
Jul 15, 2022
codyrioux
approved these changes
Jul 15, 2022
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| )); | ||
| // decouple from calling thread | ||
| .observeOn(Schedulers.computation()) |
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Thoughts on computation scheduler vs IO scheduler for this task?
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Actually I wonder why we need to specify a schedule at all. It can just run on whatever scheduler it's already running on. @hmitnflx do you know? Maybe I can just remove this line.
sundargates
approved these changes
Jul 18, 2022
| subscriptionActive.decrement(); | ||
| }) | ||
| .subscribe((T data) -> queue.write(data) | ||
| , |
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nit: move this to the previous line?
calvin681
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Jul 22, 2022
* Ensure there is only 1 subscription * clean up some formatting * fix scheduler Co-authored-by: Calvin Cheung <ccheung@netflix.com>
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Context
There is an implicit assumption that subscription should be 1. Before, the subscriptionActive gauge is always set to 1 whenever there is at least 1 subscription. I change that to increment/decrement on subscribe/unsubscribe to more accurately reflect the number of subscriptions. Before, the unsubscribe was purposely commented out. Clearly, this can lead to multiple subscription, which violates the assumption. With this change, we will unsubscribe the old subscription when a new subscription is created. This should correct keep active subscription at 1.
Checklist
./gradlew buildcompiles code correctly./gradlew testpasses all testsCONTRIBUTING.md