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SPARK-11882: Custom scheduler support
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72 changes: 72 additions & 0 deletions
72
core/src/main/scala/org/apache/spark/scheduler/SchedulerFactory.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 | ||
| * | ||
| * 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. | ||
| */ | ||
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| package org.apache.spark.scheduler | ||
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| import java.net.URI | ||
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| import org.apache.spark.SparkContext | ||
| import org.apache.spark.scheduler.cluster.CoarseGrainedSchedulerBackend | ||
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| import scala.util.Try | ||
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| /** | ||
| * An interface to be implemented if a custom scheduler is to be used. A class name of the | ||
| * particular implementation has to be added to Spark configuration at | ||
| * `spark.scheduler.factory.<name>=<class-name>`. Name is the master URI scheme which | ||
| * will make SparkContext use the particular scheduler factory. | ||
| */ | ||
| trait SchedulerFactory { | ||
| /** | ||
| * The method creates TaskScheduler. Currently it just needs to create instance of | ||
| * [[TaskSchedulerImpl]]. | ||
| */ | ||
| def createScheduler(sc: SparkContext): TaskScheduler | ||
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| /** | ||
| * The method creates a custom scheduler backend. The custom backend must implement | ||
| * [[CoarseGrainedSchedulerBackend]]. | ||
| */ | ||
| def createSchedulerBackend( | ||
| scheduler: TaskScheduler, sc: SparkContext, uri: URI): CoarseGrainedSchedulerBackend | ||
| } | ||
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| private[spark] object SchedulerFactory { | ||
| private val schedulerFactoryPattern = """^spark\.scheduler\.factory\.(.+)$""".r | ||
| private val schedulerClientPattern = """^spark\.scheduler\.client\.(.+)$""".r | ||
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| def getSchedulerFactoryClassName( | ||
| conf: Iterable[(String, String)], | ||
| schedulerName: String): Option[String] = | ||
| conf.collectFirst { | ||
| case (schedulerFactoryPattern(name), clazzName) if name.equalsIgnoreCase(schedulerName) => | ||
| clazzName | ||
| } | ||
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| def getSchedulerClientClassName( | ||
| conf: Iterable[(String, String)], | ||
| schedulerName: String): Option[String] = | ||
| conf.collectFirst { | ||
| case (schedulerClientPattern(name), clazzName) if name.equalsIgnoreCase(schedulerName) => | ||
| clazzName | ||
| } | ||
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| def unapply(masterUri: String): Option[String] = { | ||
| for (uri <- Try(new URI(masterUri)).toOption) yield uri.getScheme | ||
| } | ||
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| } |
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