core/src/main/scala/spark/storage/BlockManagerSource.scala


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package spark.storage

import com.codahale.metrics.{Gauge,MetricRegistry}

import spark.metrics.source.Source
import spark.storage._

private[spark] class BlockManagerSource(val blockManager: BlockManager) extends Source {
  val metricRegistry = new MetricRegistry()
  val sourceName = "BlockManager"

  metricRegistry.register(MetricRegistry.name("memory", "maxMem"), new Gauge[Long] {
    override def getValue: Long = {
      val storageStatusList = blockManager.master.getStorageStatus
      val maxMem = storageStatusList.map(_.maxMem).reduce(_+_)
      maxMem
    }
  })

  metricRegistry.register(MetricRegistry.name("memory", "remainingMem"), new Gauge[Long] {
    override def getValue: Long = {
      val storageStatusList = blockManager.master.getStorageStatus
      val remainingMem = storageStatusList.map(_.memRemaining).reduce(_+_)
      remainingMem
    }
  })

  metricRegistry.register(MetricRegistry.name("disk", "diskSpaceUsed"), new Gauge[Long] {
    override def getValue: Long = {
      val storageStatusList = blockManager.master.getStorageStatus
      val diskSpaceUsed = storageStatusList.flatMap(_.blocks.values.map(_.diskSize)).reduceOption(_+_).getOrElse(0L)
      diskSpaceUsed
    }
  })
}