83 lines
3.3 KiB
Scala
83 lines
3.3 KiB
Scala
package com.twitter.recos.user_video_graph
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import com.twitter.finagle.stats.StatsReceiver
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import com.twitter.finatra.kafka.consumers.FinagleKafkaConsumerBuilder
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import com.twitter.graphjet.algorithms.TweetIDMask
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import com.twitter.graphjet.bipartite.MultiSegmentPowerLawBipartiteGraph
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import com.twitter.graphjet.bipartite.segment.BipartiteGraphSegment
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import com.twitter.recos.hose.common.UnifiedGraphWriter
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import com.twitter.recos.internal.thriftscala.RecosHoseMessage
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import com.twitter.recos.serviceapi.Tweetypie._
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/**
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* The class submits a number of $numBootstrapWriters graph writer threads, BufferedEdgeWriter,
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* during service startup. One of them is live writer thread, and the other $(numBootstrapWriters - 1)
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* are catchup writer threads. All of them consume kafka events from an internal concurrent queue,
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* which is populated by kafka reader threads. At bootstrap time, the kafka reader threads look
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* back kafka offset from several hours ago and populate the internal concurrent queue.
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* Each graph writer thread writes to an individual graph segment separately.
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* The $(numBootstrapWriters - 1) catchup writer threads will stop once all events
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* between current system time at startup and the time in memcache are processed.
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* The live writer thread will continue to write all incoming kafka events.
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* It lives through the entire life cycle of recos graph service.
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*/
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case class UserVideoGraphWriter(
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shardId: String,
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env: String,
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hosename: String,
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bufferSize: Int,
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kafkaConsumerBuilder: FinagleKafkaConsumerBuilder[String, RecosHoseMessage],
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clientId: String,
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statsReceiver: StatsReceiver)
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extends UnifiedGraphWriter[BipartiteGraphSegment, MultiSegmentPowerLawBipartiteGraph] {
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writer =>
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// The max throughput for each kafka consumer is around 25MB/s
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// Use 4 processors for 100MB/s catch-up speed.
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val consumerNum: Int = 4
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// Leave 1 Segments to LiveWriter
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val catchupWriterNum: Int = RecosConfig.maxNumSegments - 1
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/**
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* Adds a RecosHoseMessage to the graph. used by live writer to insert edges to the
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* current segment
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*/
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override def addEdgeToGraph(
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graph: MultiSegmentPowerLawBipartiteGraph,
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recosHoseMessage: RecosHoseMessage
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): Unit = {
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graph.addEdge(
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recosHoseMessage.leftId,
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getMetaEdge(recosHoseMessage.rightId, recosHoseMessage.card),
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UserVideoEdgeTypeMask.actionTypeToEdgeType(recosHoseMessage.action),
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)
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}
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/**
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* Adds a RecosHoseMessage to the given segment in the graph. Used by catch up writers to
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* insert edges to non-current (old) segments
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*/
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override def addEdgeToSegment(
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segment: BipartiteGraphSegment,
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recosHoseMessage: RecosHoseMessage
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): Unit = {
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segment.addEdge(
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recosHoseMessage.leftId,
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getMetaEdge(recosHoseMessage.rightId, recosHoseMessage.card),
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UserVideoEdgeTypeMask.actionTypeToEdgeType(recosHoseMessage.action)
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)
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}
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private def getMetaEdge(rightId: Long, cardOption: Option[Byte]): Long = {
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cardOption
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.map { card =>
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if (isPhotoCard(card)) TweetIDMask.photo(rightId)
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else if (isPlayerCard(card)) TweetIDMask.player(rightId)
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else if (isSummaryCard(card)) TweetIDMask.summary(rightId)
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else if (isPromotionCard(card)) TweetIDMask.promotion(rightId)
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else rightId
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}
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.getOrElse(rightId)
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}
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}
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