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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.
72 lines
2.7 KiB
Scala
72 lines
2.7 KiB
Scala
package com.twitter.usersignalservice.handler
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import com.twitter.storehaus.ReadableStore
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import com.twitter.usersignalservice.thriftscala.BatchSignalRequest
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import com.twitter.usersignalservice.thriftscala.BatchSignalResponse
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import com.twitter.util.Future
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import com.twitter.conversions.DurationOps._
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import com.twitter.finagle.stats.StatsReceiver
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import com.twitter.frigate.common.util.StatsUtil
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import com.twitter.usersignalservice.config.SignalFetcherConfig
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import com.twitter.usersignalservice.base.Query
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import com.twitter.usersignalservice.thriftscala.ClientIdentifier
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import com.twitter.usersignalservice.thriftscala.SignalType
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import com.twitter.util.Duration
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import com.twitter.util.Timer
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import com.twitter.util.TimeoutException
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class UserSignalHandler(
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signalFetcherConfig: SignalFetcherConfig,
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timer: Timer,
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stats: StatsReceiver) {
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import UserSignalHandler._
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val statsReceiver: StatsReceiver = stats.scope("user-signal-service/service")
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def getBatchSignalsResponse(request: BatchSignalRequest): Future[Option[BatchSignalResponse]] = {
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StatsUtil.trackOptionStats(statsReceiver) {
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val allSignals = request.signalRequest.map { signalRequest =>
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signalFetcherConfig
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.SignalFetcherMapper(signalRequest.signalType)
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.get(Query(
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userId = request.userId,
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signalType = signalRequest.signalType,
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maxResults = signalRequest.maxResults.map(_.toInt),
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clientId = request.clientId.getOrElse(ClientIdentifier.Unknown)
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))
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.map(signalOpt => (signalRequest.signalType, signalOpt))
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}
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Future.collect(allSignals).map { signalsSeq =>
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val signalsMap = signalsSeq.map {
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case (signalType: SignalType, signalsOpt) =>
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(signalType, signalsOpt.getOrElse(EmptySeq))
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}.toMap
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Some(BatchSignalResponse(signalsMap))
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}
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}
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}
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def toReadableStore: ReadableStore[BatchSignalRequest, BatchSignalResponse] = {
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new ReadableStore[BatchSignalRequest, BatchSignalResponse] {
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override def get(request: BatchSignalRequest): Future[Option[BatchSignalResponse]] = {
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getBatchSignalsResponse(request).raiseWithin(UserSignalServiceTimeout)(timer).rescue {
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case _: TimeoutException =>
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statsReceiver.counter("endpointGetBatchSignals/failure/timeout").incr()
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EmptyResponse
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case e =>
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statsReceiver.counter("endpointGetBatchSignals/failure/" + e.getClass.getName).incr()
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EmptyResponse
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}
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}
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}
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}
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}
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object UserSignalHandler {
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val UserSignalServiceTimeout: Duration = 25.milliseconds
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val EmptySeq: Seq[Nothing] = Seq.empty
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val EmptyResponse: Future[Option[BatchSignalResponse]] = Future.value(Some(BatchSignalResponse()))
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}
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