42 lines
1.9 KiB
Scala
42 lines
1.9 KiB
Scala
package com.twitter.home_mixer.functional_component.feature_hydrator
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import com.twitter.conversions.DurationOps._
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import com.twitter.home_mixer.model.HomeFeatures.UserFollowedTopicsCountFeature
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import com.twitter.home_mixer.service.HomeMixerAlertConfig
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import com.twitter.product_mixer.component_library.candidate_source.topics.FollowedTopicsCandidateSource
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import com.twitter.product_mixer.core.feature.Feature
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import com.twitter.product_mixer.core.feature.featuremap.FeatureMap
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import com.twitter.product_mixer.core.feature.featuremap.FeatureMapBuilder
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import com.twitter.product_mixer.core.functional_component.candidate_source.strato.StratoKeyView
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import com.twitter.product_mixer.core.functional_component.feature_hydrator.QueryFeatureHydrator
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import com.twitter.product_mixer.core.model.common.identifier.FeatureHydratorIdentifier
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import com.twitter.product_mixer.core.pipeline.PipelineQuery
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import com.twitter.stitch.Stitch
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import javax.inject.Inject
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import javax.inject.Singleton
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@Singleton
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case class FollowedTopicsQueryFeatureHydrator @Inject() (
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followedTopicsCandidateSource: FollowedTopicsCandidateSource)
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extends QueryFeatureHydrator[PipelineQuery] {
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override val identifier: FeatureHydratorIdentifier = FeatureHydratorIdentifier("FollowedTopics")
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override val features: Set[Feature[_, _]] = Set(UserFollowedTopicsCountFeature)
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override def hydrate(query: PipelineQuery): Stitch[FeatureMap] = {
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val request: StratoKeyView[Long, Unit] = StratoKeyView(query.getRequiredUserId, Unit)
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followedTopicsCandidateSource(request)
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.map { topics =>
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FeatureMapBuilder().add(UserFollowedTopicsCountFeature, Some(topics.size)).build()
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}.handle {
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case _ => FeatureMapBuilder().add(UserFollowedTopicsCountFeature, None).build()
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}
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}
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override val alerts = Seq(
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HomeMixerAlertConfig.BusinessHours.defaultSuccessRateAlert(99.9),
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HomeMixerAlertConfig.BusinessHours.defaultLatencyAlert(1500.millis)
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)
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}
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