Github user tdas commented on a diff in the pull request:
https://github.com/apache/spark/pull/11030#discussion_r51823834
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/streaming/ContinuousQueryManagerSuite.scala
---
@@ -0,0 +1,183 @@
+/*
+ * 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.sql.streaming
+
+import scala.concurrent.Future
+import scala.util.Random
+import scala.util.control.NonFatal
+
+import org.scalatest.BeforeAndAfter
+import org.scalatest.concurrent.Eventually._
+import org.scalatest.concurrent.PatienceConfiguration.Timeout
+import org.scalatest.time.Span
+import org.scalatest.time.SpanSugar._
+
+import org.apache.spark.sql.execution.streaming.{MemorySink, MemoryStream,
StreamExecution}
+import org.apache.spark.sql.test.SharedSQLContext
+import org.apache.spark.sql.{Dataset, ContinuousQuery, StreamTest}
+
+class ContinuousQueryManagerSuite extends StreamTest with SharedSQLContext
with BeforeAndAfter {
+
+ import AwaitTerminationTester._
+ import testImplicits._
+
+ after {
+ assert(sqlContext.streams.active.isEmpty)
+ }
+
+ test("listing") {
+ val (m1, ds1) = makeDataset
+ val (m2, ds2) = makeDataset
+ val (m3, ds3) = makeDataset
+
+ withQueriesOn(ds1, ds2, ds3) { queries =>
+ require(queries.size === 3)
+ assert(sqlContext.streams.active.toSet === queries.toSet)
+ val (q1, q2, q3) = (queries(0), queries(1), queries(2))
+
+ assert(sqlContext.streams.get(q1.name).eq(q1))
+ assert(sqlContext.streams.get(q2.name).eq(q2))
+ assert(sqlContext.streams.get(q3.name).eq(q3))
+
+ q1.stop()
+
+ assert(sqlContext.streams.active.toSet === Set(q2, q3))
+ val ex1 = withClue("no error while getting non-active query") {
+ intercept[IllegalArgumentException] {
+ sqlContext.streams.get(q1.name).eq(q1)
+ }
+ }
+ assert(ex1.getMessage.contains(q1.name), "error does not contain
name of query to be fetched")
+ assert(sqlContext.streams.get(q2.name).eq(q2))
+
+ m2.addData(0) // q2 should terminate with error
+
+ eventually(Timeout(streamingTimout)) {
+ require(!q2.isActive)
+ require(q2.exception.isDefined)
+ }
+ val ex2 = withClue("no error while getting non-active query") {
+ intercept[IllegalArgumentException] {
+ sqlContext.streams.get(q2.name).eq(q2)
+ }
+ }
+
+ assert(sqlContext.streams.active.toSet === Set(q3))
+ }
+ }
+
+ test("awaitAnyTermination") {
+ val dss = Seq.fill(5)(makeDataset._2)
+ withQueriesOn(dss:_*) { queries =>
+ require(queries.size === dss.size)
+ assert(sqlContext.streams.active.toSet === queries.toSet)
+
+ testAwaitAnyTermination(ExpectBlocked)
+ testAwaitAnyTermination(ExpectBlocked, awaitTimeout = 2 seconds)
+ testAwaitAnyTermination(
+ ExpectNotBlocked, awaitTimeout = 100 milliseconds,
expectedReturnedValue = None)
+
+ val q1 = stopRandomQueryAsync(500 milliseconds)
+ testAwaitAnyTermination(ExpectNotBlocked, expectedReturnedValue = q1)
+ eventually(Timeout(streamingTimout)) { require(!q1.isActive) }
+
+
+ val q2 = stopRandomQueryAsync(500 milliseconds)
+ testAwaitAnyTermination(
+ ExpectNotBlocked,
+ awaitTimeout = 2 seconds,
+ expectedReturnedValue = Some(q2),
+ testTimeout = 4 seconds)
+ eventually(Timeout(streamingTimout)) { require(!q2.isActive) }
+
+ val q3 = stopRandomQueryAsync(500 milliseconds)
+ testAwaitAnyTermination(
+ ExpectNotBlocked, awaitTimeout = 100 milliseconds,
expectedReturnedValue = None)
+ eventually(Timeout(streamingTimout)) { require(!q3.isActive) }
+
+ assert(sqlContext.streams.active.size === 2)
+ }
+ }
+
+ private def withQueriesOn(datasets: Dataset[_]*)(body:
Seq[ContinuousQuery] => Unit): Unit = {
+ failAfter(streamingTimout) {
+ val queries = withClue("Error starting queries") {
+ datasets.map { ds =>
+ @volatile var query: StreamExecution = null
+ try {
+ val df = ds.toDF
+ query = sqlContext
+ .streams
+ .startQuery(StreamExecution.nextName, df, new
MemorySink(df.schema))
+ .asInstanceOf[StreamExecution]
+ } catch {
+ case NonFatal(e) =>
+ if (query != null) query.stop()
+ throw e
+ }
+ query
+ }
+ }
+ try {
+ body(queries)
+ } finally {
+ queries.foreach(_.stop())
+ }
+ }
+ }
+
+ private def makeDataset: (MemoryStream[Int], Dataset[Int]) = {
+ val inputData = MemoryStream[Int]
+ val mapped = inputData.toDS.map(6 / _)
+ (inputData, mapped)
+ }
+
+ private def testAwaitAnyTermination(
+ expectedBehavior: ExpectedBehavior,
+ expectedReturnedValue: Any = null,
+ awaitTimeout: Span = null,
+ testTimeout: Span = 1000 milliseconds
+ ): Unit = {
+ require(expectedBehavior != ExpectNotBlocked || expectedReturnedValue
!= null,
+ "Expected returned value not specified when awaitTermination is
expected to be not blocked")
+
+ def awaitTermFunc(): Unit = {
+ val returnedValue = if (awaitTimeout != null &&
awaitTimeout.toMillis > 0) {
+ sqlContext.streams.awaitAnyTermination(awaitTimeout.toMillis)
+ } else {
+ sqlContext.streams.awaitAnyTermination()
+ }
+ assert(returnedValue === expectedReturnedValue,
+ "Returned value does not match expect3ed")
+ }
+
+ AwaitTerminationTester.test(expectedBehavior, awaitTermFunc,
testTimeout)
+ }
+
+ private def stopRandomQueryAsync(delay: Span): ContinuousQuery = {
+ import scala.concurrent.ExecutionContext.Implicits.global
+
+ val activeQueries = sqlContext.streams.active
+ val queryToStop = activeQueries(Random.nextInt(activeQueries.length))
--- End diff --
Done.
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