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79 lines
3.3 KiB
Scala
79 lines
3.3 KiB
Scala
package com.twitter.home_mixer.functional_component.side_effect
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import com.twitter.home_mixer.model.HomeFeatures.FollowingLastNonPollingTimeFeature
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import com.twitter.home_mixer.model.HomeFeatures.NonPollingTimesFeature
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import com.twitter.home_mixer.model.HomeFeatures.PollingFeature
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import com.twitter.home_mixer.model.request.DeviceContext
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import com.twitter.home_mixer.model.request.HasDeviceContext
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import com.twitter.home_mixer.model.request.FollowingProduct
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import com.twitter.home_mixer.service.HomeMixerAlertConfig
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import com.twitter.product_mixer.component_library.side_effect.UserSessionStoreUpdateSideEffect
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import com.twitter.product_mixer.core.model.common.identifier.SideEffectIdentifier
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import com.twitter.product_mixer.core.model.marshalling.HasMarshalling
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import com.twitter.product_mixer.core.pipeline.PipelineQuery
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import com.twitter.timelineservice.model.util.FinagleRequestContext
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import com.twitter.user_session_store.ReadWriteUserSessionStore
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import com.twitter.user_session_store.WriteRequest
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import com.twitter.user_session_store.thriftscala.NonPollingTimestamps
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import com.twitter.user_session_store.thriftscala.UserSessionField
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import com.twitter.util.Time
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import javax.inject.Inject
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import javax.inject.Singleton
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/**
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* Side effect that updates the User Session Store (Manhattan) with the timestamps of non polling requests.
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*/
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@Singleton
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class UpdateLastNonPollingTimeSideEffect[
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Query <: PipelineQuery with HasDeviceContext,
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ResponseType <: HasMarshalling] @Inject() (
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override val userSessionStore: ReadWriteUserSessionStore)
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extends UserSessionStoreUpdateSideEffect[
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WriteRequest,
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Query,
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ResponseType
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] {
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private val MaxNonPollingTimes = 10
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override val identifier: SideEffectIdentifier = SideEffectIdentifier("UpdateLastNonPollingTime")
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/**
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* When the request is non polling and is not a background fetch request, update
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* the list of non polling timestamps with the timestamp of the current request
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*/
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override def buildWriteRequest(query: Query): Option[WriteRequest] = {
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val isBackgroundFetch = query.deviceContext
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.exists(_.requestContextValue.contains(DeviceContext.RequestContext.BackgroundFetch))
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if (!query.features.exists(_.getOrElse(PollingFeature, false)) && !isBackgroundFetch) {
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val fields = Seq(UserSessionField.NonPollingTimestamps(makeLastNonPollingTimestamps(query)))
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Some(WriteRequest(query.getRequiredUserId, fields))
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} else None
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}
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override val alerts = Seq(
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HomeMixerAlertConfig.BusinessHours.defaultSuccessRateAlert(99.96)
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)
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private def makeLastNonPollingTimestamps(query: Query): NonPollingTimestamps = {
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val priorNonPollingTimestamps =
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query.features.map(_.getOrElse(NonPollingTimesFeature, Seq.empty)).toSeq.flatten
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val lastNonPollingTimeMs =
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FinagleRequestContext.default.requestStartTime.get.getOrElse(Time.now).inMillis
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val followingLastNonPollingTime = query.features
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.flatMap(features => features.getOrElse(FollowingLastNonPollingTimeFeature, None))
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.map(_.inMillis)
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NonPollingTimestamps(
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nonPollingTimestampsMs =
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(lastNonPollingTimeMs +: priorNonPollingTimestamps).take(MaxNonPollingTimes),
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mostRecentHomeLatestNonPollingTimestampMs =
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if (query.product == FollowingProduct) Some(lastNonPollingTimeMs)
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else followingLastNonPollingTime
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)
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}
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}
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