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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.storage
import java.io.{File, FileOutputStream}
import org.scalatest.{BeforeAndAfter, Matchers}
import org.apache.spark._
import org.apache.spark.util.Utils
class TopologyMapperSuite extends SparkFunSuite
with Matchers
with BeforeAndAfter
with LocalSparkContext {
test("File based Topology Mapper") {
val numHosts = 100
val numRacks = 4
val props = (1 to numHosts).map{i => s"host-$i" -> s"rack-${i % numRacks}"}.toMap
val propsFile = createPropertiesFile(props)
val sparkConf = (new SparkConf(false))
sparkConf.set("spark.storage.replication.topologyFile", propsFile.getAbsolutePath)
val topologyMapper = new FileBasedTopologyMapper(sparkConf)
props.foreach {case (host, topology) =>
val obtainedTopology = topologyMapper.getTopologyForHost(host)
assert(obtainedTopology.isDefined)
assert(obtainedTopology.get === topology)
}
// we get None for hosts not in the file
assert(topologyMapper.getTopologyForHost("host").isEmpty)
cleanup(propsFile)
}
def createPropertiesFile(props: Map[String, String]): File = {
val testFile = new File(Utils.createTempDir(), "TopologyMapperSuite-test").getAbsoluteFile
val fileOS = new FileOutputStream(testFile)
props.foreach{case (k, v) => fileOS.write(s"$k=$v\n".getBytes)}
fileOS.close
testFile
}
def cleanup(testFile: File): Unit = {
testFile.getParentFile.listFiles.filter { file =>
file.getName.startsWith(testFile.getName)
}.foreach { _.delete() }
}
}
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