spark Slf4jSink 源码
spark Slf4jSink 代码
文件路径：/core/src/main/scala/org/apache/spark/metrics/sink/Slf4jSink.scala
/*
* 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
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.spark.metrics.sink
import java.util.{Locale, Properties}
import java.util.concurrent.TimeUnit
import com.codahale.metrics.{MetricRegistry, Slf4jReporter}
import org.apache.spark.metrics.MetricsSystem
private[spark] class Slf4jSink(
val property: Properties, val registry: MetricRegistry) extends Sink {
val SLF4J_DEFAULT_PERIOD = 10
val SLF4J_DEFAULT_UNIT = "SECONDS"
val SLF4J_KEY_PERIOD = "period"
val SLF4J_KEY_UNIT = "unit"
val pollPeriod = Option(property.getProperty(SLF4J_KEY_PERIOD)) match {
case Some(s) => s.toInt
case None => SLF4J_DEFAULT_PERIOD
}
val pollUnit: TimeUnit = Option(property.getProperty(SLF4J_KEY_UNIT)) match {
case Some(s) => TimeUnit.valueOf(s.toUpperCase(Locale.ROOT))
case None => TimeUnit.valueOf(SLF4J_DEFAULT_UNIT)
}
MetricsSystem.checkMinimalPollingPeriod(pollUnit, pollPeriod)
val reporter: Slf4jReporter = Slf4jReporter.forRegistry(registry)
.convertDurationsTo(TimeUnit.MILLISECONDS)
.convertRatesTo(TimeUnit.SECONDS)
.build()
override def start(): Unit = {
reporter.start(pollPeriod, pollUnit)
}
override def stop(): Unit = {
reporter.stop()
}
override def report(): Unit = {
reporter.report()
}
}
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