Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/15152#discussion_r79887133
--- Diff:
core/src/test/scala/org/apache/spark/ExecutorAllocationManagerSuite.scala ---
@@ -1040,3 +1094,62 @@ private object ExecutorAllocationManagerSuite
extends PrivateMethodTester {
manager invokePrivate _hostToLocalTaskCount()
}
}
+
+/**
+ * A cluster manager which wraps around the scheduler and backend for
local mode. It is used for
+ * testing the dynamic allocation policy.
+ */
+private class DummyLocalExternalClusterManager extends
ExternalClusterManager {
+
+ def canCreate(masterURL: String): Boolean = masterURL ==
"myDummyLocalExternalClusterManager"
+
+ override def createTaskScheduler(sc: SparkContext,
+ masterURL: String): TaskScheduler =
+ new TaskSchedulerImpl(sc, 1, isLocal = true)
+
+ override def createSchedulerBackend(sc: SparkContext,
+ masterURL: String,
+ scheduler: TaskScheduler): SchedulerBackend = {
+ val sb = new LocalSchedulerBackend(sc.getConf,
scheduler.asInstanceOf[TaskSchedulerImpl], 1)
+ new DummyLocalSchedulerBackend(sc, sb)
+ }
+
+ override def initialize(scheduler: TaskScheduler, backend:
SchedulerBackend): Unit = {
+ val sc = scheduler.asInstanceOf[TaskSchedulerImpl]
+ sc.initialize(backend)
+ }
+}
+
+/**
+ * A scheduler backend which wraps around local scheduler backend and
exposes the executor
+ * allocation client interface for testing dynamic allocation.
+ */
+private class DummyLocalSchedulerBackend (sc: SparkContext, sb:
SchedulerBackend)
+ extends SchedulerBackend with ExecutorAllocationClient {
+
+ override private[spark] def getExecutorIds(): Seq[String] =
sc.getExecutorIds()
+
+ override private[spark] def requestTotalExecutors(
+ numExecutors: Int, localityAwareTasks: Int, hostToLocalTaskCount:
Map[String, Int]
+ ): Boolean = sc.requestTotalExecutors(numExecutors,
localityAwareTasks, hostToLocalTaskCount)
+
+ override def requestExecutors(numAdditionalExecutors: Int): Boolean =
+ sc.requestExecutors(numAdditionalExecutors)
--- End diff --
indentation
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