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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
*
* 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.Properties
import java.util.concurrent.TimeUnit
import com.codahale.metrics.MetricRegistry
import com.codahale.metrics.ganglia.GangliaReporter
import info.ganglia.gmetric4j.gmetric.GMetric
import info.ganglia.gmetric4j.gmetric.GMetric.UDPAddressingMode
import org.apache.spark.SecurityManager
import org.apache.spark.metrics.MetricsSystem
class GangliaSink(val property: Properties, val registry: MetricRegistry,
securityMgr: SecurityManager) extends Sink {
val GANGLIA_KEY_PERIOD = "period"
val GANGLIA_DEFAULT_PERIOD = 10
val GANGLIA_KEY_UNIT = "unit"
val GANGLIA_DEFAULT_UNIT: TimeUnit = TimeUnit.SECONDS
val GANGLIA_KEY_MODE = "mode"
val GANGLIA_DEFAULT_MODE: UDPAddressingMode = GMetric.UDPAddressingMode.MULTICAST
// TTL for multicast messages. If listeners are X hops away in network, must be at least X.
val GANGLIA_KEY_TTL = "ttl"
val GANGLIA_DEFAULT_TTL = 1
val GANGLIA_KEY_HOST = "host"
val GANGLIA_KEY_PORT = "port"
def propertyToOption(prop: String): Option[String] = Option(property.getProperty(prop))
if (!propertyToOption(GANGLIA_KEY_HOST).isDefined) {
throw new Exception("Ganglia sink requires 'host' property.")
}
if (!propertyToOption(GANGLIA_KEY_PORT).isDefined) {
throw new Exception("Ganglia sink requires 'port' property.")
}
val host = propertyToOption(GANGLIA_KEY_HOST).get
val port = propertyToOption(GANGLIA_KEY_PORT).get.toInt
val ttl = propertyToOption(GANGLIA_KEY_TTL).map(_.toInt).getOrElse(GANGLIA_DEFAULT_TTL)
val mode: UDPAddressingMode = propertyToOption(GANGLIA_KEY_MODE)
.map(u => GMetric.UDPAddressingMode.valueOf(u.toUpperCase)).getOrElse(GANGLIA_DEFAULT_MODE)
val pollPeriod = propertyToOption(GANGLIA_KEY_PERIOD).map(_.toInt)
.getOrElse(GANGLIA_DEFAULT_PERIOD)
val pollUnit: TimeUnit = propertyToOption(GANGLIA_KEY_UNIT)
.map(u => TimeUnit.valueOf(u.toUpperCase))
.getOrElse(GANGLIA_DEFAULT_UNIT)
MetricsSystem.checkMinimalPollingPeriod(pollUnit, pollPeriod)
val ganglia = new GMetric(host, port, mode, ttl)
val reporter: GangliaReporter = GangliaReporter.forRegistry(registry)
.convertDurationsTo(TimeUnit.MILLISECONDS)
.convertRatesTo(TimeUnit.SECONDS)
.build(ganglia)
override def start() {
reporter.start(pollPeriod, pollUnit)
}
override def stop() {
reporter.stop()
}
override def report() {
reporter.report()
}
}
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