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Throttle feed loading to avoid YouTube rate limits #11743

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Merged
Stypox merged 2 commits into from
Nov 24, 2024
Merged

Throttle feed loading to avoid YouTube rate limits #11743

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33b96d2
Throttle loading subscriptions feed to avoid YouTube rate limits
Stypox Nov 24, 2024
726c12e
Only throttle YouTube feed loading
Stypox Nov 24, 2024
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25 changes: 24 additions & 1 deletion app/src/main/java/org/schabi/newpipe/local/feed/service/FeedLoadManager.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -90,6 +90,10 @@ class FeedLoadManager(private val context: Context) {
else -> feedDatabaseManager.outdatedSubscriptionsForGroup(groupId, outdatedThreshold)
}

// like `currentProgress`, but counts the number of extractions that have begun, so they
// can be properly throttled every once in a while (see doOnNext below)
val extractionCount = AtomicInteger()

return outdatedSubscriptions
.take(1)
.doOnNext {
Expand All @@ -105,6 +109,13 @@ class FeedLoadManager(private val context: Context) {
.observeOn(Schedulers.io())
.flatMap { Flowable.fromIterable(it) }
.takeWhile { !cancelSignal.get() }
.doOnNext {
// throttle extractions once every BATCH_SIZE to avoid being throttled
val previousCount = extractionCount.getAndIncrement()
if (previousCount != 0 && previousCount % BATCH_SIZE == 0) {
Thread.sleep(DELAY_BETWEEN_BATCHES_MILLIS.random())
}
}
.parallel(PARALLEL_EXTRACTIONS, PARALLEL_EXTRACTIONS * 2)
.runOn(Schedulers.io(), PARALLEL_EXTRACTIONS * 2)
.filter { !cancelSignal.get() }
Expand Down Expand Up @@ -328,7 +339,19 @@ class FeedLoadManager(private val context: Context) {
/**
* How many extractions will be running in parallel.
*/
private const val PARALLEL_EXTRACTIONS = 6
private const val PARALLEL_EXTRACTIONS = 3

/**
* How many extractions to perform before waiting [DELAY_BETWEEN_BATCHES_MILLIS] to avoid
* being rate limited
*/
private const val BATCH_SIZE = 50

/**
* Wait a random delay in this range once every [BATCH_SIZE] extractions to avoid being
* rate limited
*/
private val DELAY_BETWEEN_BATCHES_MILLIS = (6000L..12000L)

/**
* Number of items to buffer to mass-insert in the database.
Expand Down