50 lines
2.0 KiB
Scala
50 lines
2.0 KiB
Scala
package com.twitter.home_mixer.functional_component.feature_hydrator
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import com.google.inject.name.Named
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import com.twitter.finagle.stats.StatsReceiver
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import com.twitter.home_mixer.param.HomeMixerInjectionNames.RealTimeInteractionGraphUserVertexCache
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import com.twitter.home_mixer.util.ObservedKeyValueResultHandler
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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.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.servo.cache.ReadCache
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import com.twitter.stitch.Stitch
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import com.twitter.wtf.real_time_interaction_graph.{thriftscala => ig}
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import javax.inject.Inject
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import javax.inject.Singleton
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object RealTimeInteractionGraphUserVertexQueryFeature
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extends Feature[PipelineQuery, Option[ig.UserVertex]]
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@Singleton
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class RealTimeInteractionGraphUserVertexQueryFeatureHydrator @Inject() (
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@Named(RealTimeInteractionGraphUserVertexCache) client: ReadCache[Long, ig.UserVertex],
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override val statsReceiver: StatsReceiver)
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extends QueryFeatureHydrator[PipelineQuery]
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with ObservedKeyValueResultHandler {
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override val identifier: FeatureHydratorIdentifier =
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FeatureHydratorIdentifier("RealTimeInteractionGraphUserVertex")
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override val features: Set[Feature[_, _]] = Set(RealTimeInteractionGraphUserVertexQueryFeature)
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override val statScope: String = identifier.toString
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override def hydrate(query: PipelineQuery): Stitch[FeatureMap] = {
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val userId = query.getRequiredUserId
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Stitch.callFuture(
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client.get(Seq(userId)).map { results =>
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val feature = observedGet(key = Some(userId), keyValueResult = results)
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FeatureMapBuilder()
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.add(RealTimeInteractionGraphUserVertexQueryFeature, feature)
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.build()
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}
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)
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}
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}
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