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Don't use value class Reset with AtomicRef #863

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merged 5 commits into from
Sep 3, 2023
Merged

Don't use value class Reset with AtomicRef #863

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57ca32f
No longer use value class for Reset class in rate-limiter
DRSchlaubi Aug 31, 2023
1465628
Merge branch 'main' into feature/no-value-reset
lukellmann Sep 3, 2023
b8b1948
Deprecate Reset and use Instant
lukellmann Sep 3, 2023
e08adf5
Revert "Deprecate Reset and use Instant"
lukellmann Sep 3, 2023
54c42ed
Don't change public API, just use Instant in internals
lukellmann Sep 3, 2023
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14 changes: 7 additions & 7 deletions rest/src/commonMain/kotlin/ratelimit/AbstractRateLimiter.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -6,28 +6,28 @@ import dev.kord.rest.request.Request
import dev.kord.rest.request.RequestIdentifier
import dev.kord.rest.request.identifier
import kotlinx.atomicfu.atomic
import kotlinx.atomicfu.update
import kotlinx.coroutines.CompletableDeferred
import kotlinx.coroutines.delay
import kotlinx.coroutines.sync.Mutex
import kotlinx.datetime.Clock
import kotlinx.datetime.Instant
import mu.KLogger
import kotlin.time.Duration.Companion.minutes

public abstract class AbstractRateLimiter internal constructor(public val clock: Clock) : RequestRateLimiter {
internal abstract val logger: KLogger

private val autoBanRateLimiter = IntervalRateLimiter(limit = 25000, interval = 10.minutes)
private val globalSuspensionPoint = atomic(Reset(clock.now()))
private val globalSuspensionPoint = atomic(clock.now())
internal val buckets = ConcurrentHashMap<BucketKey, Bucket>()
private val routeBuckets = ConcurrentHashMap<RequestIdentifier, MutableSet<BucketKey>>()

internal val BucketKey.bucket get() = buckets.getOrPut(this) { Bucket(this) }
private val Request<*, *>.buckets get() = routeBuckets[identifier].orEmpty().map { it.bucket }
internal fun RequestIdentifier.addBucket(id: BucketKey) = routeBuckets.getOrPut(this) { mutableSetOf() }.add(id)

internal suspend fun Reset.await() {
val duration = value - clock.now()
private suspend fun Instant.await() {
val duration = this - clock.now()
if (duration.isNegative()) return
delay(duration)
}
Expand Down Expand Up @@ -67,7 +67,7 @@ public abstract class AbstractRateLimiter internal constructor(public val clock:
when (response) {
is RequestResponse.GlobalRateLimit -> {
logger.trace { "[RATE LIMIT]:[GLOBAL]:exhausted until ${response.reset.value}" }
globalSuspensionPoint.update { response.reset }
globalSuspensionPoint.value = response.reset.value
}
is RequestResponse.BucketRateLimit -> {
logger.trace { "[RATE LIMIT]:[BUCKET]:Bucket ${response.bucketKey.value} was exhausted until ${response.reset.value}" }
Expand All @@ -83,7 +83,7 @@ public abstract class AbstractRateLimiter internal constructor(public val clock:
}

internal inner class Bucket(val id: BucketKey) {
private val reset = atomic(Reset(clock.now()))
private val reset = atomic(clock.now())
private val mutex = Mutex()

suspend fun awaitAndLock() {
Expand All @@ -93,7 +93,7 @@ public abstract class AbstractRateLimiter internal constructor(public val clock:
}

fun updateReset(newValue: Reset) {
reset.update { newValue }
reset.value = newValue.value
}

fun unlock() = mutex.unlock()
Expand Down