spark MasterSource 源码
spark MasterSource 代码
文件路径：/core/src/main/scala/org/apache/spark/deploy/master/MasterSource.scala
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* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
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* distributed under the License is distributed on an "AS IS" BASIS,
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* limitations under the License.
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package org.apache.spark.deploy.master
import com.codahale.metrics.{Gauge, MetricRegistry}
import org.apache.spark.metrics.source.Source
private[spark] class MasterSource(val master: Master) extends Source {
override val metricRegistry = new MetricRegistry()
override val sourceName = "master"
// Gauge for worker numbers in cluster
metricRegistry.register(MetricRegistry.name("workers"), new Gauge[Int] {
override def getValue: Int = master.workers.size
})
// Gauge for alive worker numbers in cluster
metricRegistry.register(MetricRegistry.name("aliveWorkers"), new Gauge[Int]{
override def getValue: Int = master.workers.count(_.state == WorkerState.ALIVE)
})
// Gauge for application numbers in cluster
metricRegistry.register(MetricRegistry.name("apps"), new Gauge[Int] {
override def getValue: Int = master.apps.size
})
// Gauge for waiting application numbers in cluster
metricRegistry.register(MetricRegistry.name("waitingApps"), new Gauge[Int] {
override def getValue: Int = master.apps.count(_.state == ApplicationState.WAITING)
})
}
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