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Implement java.util.concurrent.Semaphore and use it in IOThrottler #4102

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gzm0 opened this issue Jun 26, 2020 · 4 comments
Open

Implement java.util.concurrent.Semaphore and use it in IOThrottler #4102

gzm0 opened this issue Jun 26, 2020 · 4 comments
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good first issue help wanted missing javalib

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@gzm0
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@gzm0 gzm0 commented Jun 26, 2020

This is a follow-up to #4097 where we used an AtomicInteger as a poor-mans replacement for a Semaphore with tryAcquire (or maybe even drainPermits).
@hepin1989
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@hepin1989 hepin1989 commented Oct 21, 2020

Better implement AQS first？
@gzm0
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@gzm0 gzm0 commented Oct 21, 2020

What's AQS?
@hepin1989
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@hepin1989 hepin1989 commented Oct 21, 2020

@gzm0 AbstractQueuedSynchronizer
@sjrd
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@sjrd sjrd commented Oct 21, 2020

And why would we need this AbstractQueuedSynchronizer before implementing Semaphore? Semaphore's API doesn't mention that class, so there is no dependency.
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