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LocalSparkSession.scala
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LocalSparkSession.scala
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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.sql
import _root_.io.netty.util.internal.logging.{InternalLoggerFactory, Slf4JLoggerFactory}
import org.scalatest.BeforeAndAfterAll
import org.scalatest.BeforeAndAfterEach
import org.scalatest.Suite
/** Manages a local `spark` {@link SparkSession} variable, correctly stopping it after each test. */
trait LocalSparkSession extends BeforeAndAfterEach with BeforeAndAfterAll { self: Suite =>
@transient var spark: SparkSession = _
override def beforeAll(): Unit = {
super.beforeAll()
InternalLoggerFactory.setDefaultFactory(Slf4JLoggerFactory.INSTANCE)
SparkSession.clearActiveSession()
SparkSession.clearDefaultSession()
}
override def afterEach(): Unit = {
try {
LocalSparkSession.stop(spark)
SparkSession.clearActiveSession()
SparkSession.clearDefaultSession()
spark = null
} finally {
super.afterEach()
}
}
}
object LocalSparkSession {
def stop(spark: SparkSession): Unit = {
if (spark != null) {
spark.stop()
}
// To avoid RPC rebinding to the same port, since it doesn't unbind immediately on shutdown
System.clearProperty("spark.driver.port")
}
/** Runs `f` by passing in `sc` and ensures that `sc` is stopped. */
def withSparkSession[T](sc: SparkSession)(f: SparkSession => T): T = {
try {
f(sc)
} finally {
stop(sc)
}
}
}