the-algorithm/product-mixer/component-library/src/main/scala/com/twitter/product_mixer/component_library/scorer/param_gated/ParamGatedScorer.scala
twitter-team ef4c5eb65e Twitter Recommendation Algorithm
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2023-03-31 17:36:31 -05:00

44 lines
1.9 KiB
Scala

package com.twitter.product_mixer.component_library.scorer.param_gated
import com.twitter.product_mixer.component_library.scorer.param_gated.ParamGatedScorer.IdentifierPrefix
import com.twitter.product_mixer.core.feature.Feature
import com.twitter.product_mixer.core.feature.featuremap.FeatureMap
import com.twitter.product_mixer.core.functional_component.common.alert.Alert
import com.twitter.product_mixer.core.functional_component.scorer.Scorer
import com.twitter.product_mixer.core.model.common.CandidateWithFeatures
import com.twitter.product_mixer.core.model.common.Conditionally
import com.twitter.product_mixer.core.model.common.UniversalNoun
import com.twitter.product_mixer.core.model.common.identifier.ScorerIdentifier
import com.twitter.product_mixer.core.pipeline.PipelineQuery
import com.twitter.stitch.Stitch
import com.twitter.timelines.configapi.Param
/**
* A [[scorer]] with [[Conditionally]] based on a [[Param]]
*
* @param enabledParam the param to turn this [[scorer]] on and off
* @param scorer the underlying [[scorer]] to run when `enabledParam` is true
* @tparam Query The domain model for the query or request
* @tparam Result The type of the candidates
*/
case class ParamGatedScorer[-Query <: PipelineQuery, Result <: UniversalNoun[Any]](
enabledParam: Param[Boolean],
scorer: Scorer[Query, Result])
extends Scorer[Query, Result]
with Conditionally[Query] {
override val identifier: ScorerIdentifier = ScorerIdentifier(
IdentifierPrefix + scorer.identifier.name)
override val alerts: Seq[Alert] = scorer.alerts
override val features: Set[Feature[_, _]] = scorer.features
override def onlyIf(query: Query): Boolean =
Conditionally.and(query, scorer, query.params(enabledParam))
override def apply(
query: Query,
candidates: Seq[CandidateWithFeatures[Result]]
): Stitch[Seq[FeatureMap]] = scorer(query, candidates)
}
object ParamGatedScorer {
val IdentifierPrefix = "ParamGated"
}