mirror of
https://github.com/twitter/the-algorithm.git
synced 2024-06-01 08:48:46 +02:00
f1b5c32734
User Signal Service (USS) is a centralized online platform that supplies comprehensive data on user actions and behaviors on Twitter. This service stores information on both explicit signals, such as Favorites, Retweets, and replies, and implicit signals like Tweet clicks, profile visits, and more.
59 lines
2.2 KiB
Scala
59 lines
2.2 KiB
Scala
package com.twitter.usersignalservice.base
|
|
|
|
import com.twitter.finagle.stats.StatsReceiver
|
|
import com.twitter.frigate.common.base.Stats
|
|
import com.twitter.storehaus.ReadableStore
|
|
import com.twitter.twistly.common.UserId
|
|
import com.twitter.usersignalservice.base.BaseSignalFetcher.Timeout
|
|
import com.twitter.usersignalservice.thriftscala.Signal
|
|
import com.twitter.usersignalservice.thriftscala.SignalType
|
|
import com.twitter.util.Future
|
|
import com.twitter.util.Timer
|
|
|
|
case class AggregatedSignalController(
|
|
signalsAggregationInfo: Seq[SignalAggregatedInfo],
|
|
signalsWeightMapInfo: Map[SignalType, Double],
|
|
stats: StatsReceiver,
|
|
timer: Timer)
|
|
extends ReadableStore[Query, Seq[Signal]] {
|
|
|
|
val name: String = this.getClass.getCanonicalName
|
|
val statsReceiver: StatsReceiver = stats.scope(name)
|
|
|
|
override def get(query: Query): Future[Option[Seq[Signal]]] = {
|
|
Stats
|
|
.trackItems(statsReceiver) {
|
|
val allSignalsFut =
|
|
Future
|
|
.collect(signalsAggregationInfo.map(_.getSignals(query.userId))).map(_.flatten.flatten)
|
|
val aggregatedSignals =
|
|
allSignalsFut.map { allSignals =>
|
|
allSignals
|
|
.groupBy(_.targetInternalId).collect {
|
|
case (Some(internalId), signals) =>
|
|
val mostRecentEnagementTime = signals.map(_.timestamp).max
|
|
val totalWeight =
|
|
signals
|
|
.map(signal => signalsWeightMapInfo.getOrElse(signal.signalType, 0.0)).sum
|
|
(Signal(query.signalType, mostRecentEnagementTime, Some(internalId)), totalWeight)
|
|
}.toSeq.sortBy { case (signal, weight) => (-weight, -signal.timestamp) }
|
|
.map(_._1)
|
|
.take(query.maxResults.getOrElse(Int.MaxValue))
|
|
}
|
|
aggregatedSignals.map(Some(_))
|
|
}.raiseWithin(Timeout)(timer).handle {
|
|
case e =>
|
|
statsReceiver.counter(e.getClass.getCanonicalName).incr()
|
|
Some(Seq.empty[Signal])
|
|
}
|
|
}
|
|
}
|
|
|
|
case class SignalAggregatedInfo(
|
|
signalType: SignalType,
|
|
signalFetcher: ReadableStore[Query, Seq[Signal]]) {
|
|
def getSignals(userId: UserId): Future[Option[Seq[Signal]]] = {
|
|
signalFetcher.get(Query(userId, signalType, None))
|
|
}
|
|
}
|