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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
import org.mockito.Mockito._
import org.scalatest.BeforeAndAfter
import org.scalatest.mock.MockitoSugar
import org.apache.spark.executor.DataReadMethod
import org.apache.spark.rdd.RDD
import org.apache.spark.storage._
// TODO: Test the CacheManager's thread-safety aspects
class CacheManagerSuite extends SparkFunSuite with LocalSparkContext with BeforeAndAfter
with MockitoSugar {
var blockManager: BlockManager = _
var cacheManager: CacheManager = _
var split: Partition = _
/** An RDD which returns the values [1, 2, 3, 4]. */
var rdd: RDD[Int] = _
var rdd2: RDD[Int] = _
var rdd3: RDD[Int] = _
before {
sc = new SparkContext("local", "test")
blockManager = mock[BlockManager]
cacheManager = new CacheManager(blockManager)
split = new Partition { override def index: Int = 0 }
rdd = new RDD[Int](sc, Nil) {
override def getPartitions: Array[Partition] = Array(split)
override val getDependencies = List[Dependency[_]]()
override def compute(split: Partition, context: TaskContext): Iterator[Int] =
Array(1, 2, 3, 4).iterator
}
rdd2 = new RDD[Int](sc, List(new OneToOneDependency(rdd))) {
override def getPartitions: Array[Partition] = firstParent[Int].partitions
override def compute(split: Partition, context: TaskContext): Iterator[Int] =
firstParent[Int].iterator(split, context)
}.cache()
rdd3 = new RDD[Int](sc, List(new OneToOneDependency(rdd2))) {
override def getPartitions: Array[Partition] = firstParent[Int].partitions
override def compute(split: Partition, context: TaskContext): Iterator[Int] =
firstParent[Int].iterator(split, context)
}.cache()
}
test("get uncached rdd") {
// Do not mock this test, because attempting to match Array[Any], which is not covariant,
// in blockManager.put is a losing battle. You have been warned.
blockManager = sc.env.blockManager
cacheManager = sc.env.cacheManager
val context = new TaskContextImpl(0, 0, 0, 0, null, null)
val computeValue = cacheManager.getOrCompute(rdd, split, context, StorageLevel.MEMORY_ONLY)
val getValue = blockManager.get(RDDBlockId(rdd.id, split.index))
assert(computeValue.toList === List(1, 2, 3, 4))
assert(getValue.isDefined, "Block cached from getOrCompute is not found!")
assert(getValue.get.data.toList === List(1, 2, 3, 4))
}
test("get cached rdd") {
val result = new BlockResult(Array(5, 6, 7).iterator, DataReadMethod.Memory, 12)
when(blockManager.get(RDDBlockId(0, 0))).thenReturn(Some(result))
val context = new TaskContextImpl(0, 0, 0, 0, null, null)
val value = cacheManager.getOrCompute(rdd, split, context, StorageLevel.MEMORY_ONLY)
assert(value.toList === List(5, 6, 7))
}
test("get uncached local rdd") {
// Local computation should not persist the resulting value, so don't expect a put().
when(blockManager.get(RDDBlockId(0, 0))).thenReturn(None)
val context = new TaskContextImpl(0, 0, 0, 0, null, null, true)
val value = cacheManager.getOrCompute(rdd, split, context, StorageLevel.MEMORY_ONLY)
assert(value.toList === List(1, 2, 3, 4))
}
test("verify task metrics updated correctly") {
cacheManager = sc.env.cacheManager
val context = new TaskContextImpl(0, 0, 0, 0, null, null)
cacheManager.getOrCompute(rdd3, split, context, StorageLevel.MEMORY_ONLY)
assert(context.taskMetrics.updatedBlocks.getOrElse(Seq()).size === 2)
}
}
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