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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.scheduler
import java.util.Properties
import org.apache.spark.TaskContext
class FakeTask(
stageId: Int,
prefLocs: Seq[TaskLocation] = Nil)
extends Task[Int](stageId, 0, 0, Seq.empty, new Properties) {
override def runTask(context: TaskContext): Int = 0
override def preferredLocations: Seq[TaskLocation] = prefLocs
}
object FakeTask {
/**
* Utility method to create a TaskSet, potentially setting a particular sequence of preferred
* locations for each task (given as varargs) if this sequence is not empty.
*/
def createTaskSet(numTasks: Int, prefLocs: Seq[TaskLocation]*): TaskSet = {
createTaskSet(numTasks, 0, prefLocs: _*)
}
def createTaskSet(numTasks: Int, stageAttemptId: Int, prefLocs: Seq[TaskLocation]*): TaskSet = {
if (prefLocs.size != 0 && prefLocs.size != numTasks) {
throw new IllegalArgumentException("Wrong number of task locations")
}
val tasks = Array.tabulate[Task[_]](numTasks) { i =>
new FakeTask(i, if (prefLocs.size != 0) prefLocs(i) else Nil)
}
new TaskSet(tasks, 0, stageAttemptId, 0, null)
}
}
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