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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 spark
import org.scalatest.Suite
import org.scalatest.BeforeAndAfterEach
import org.scalatest.BeforeAndAfterAll
import org.jboss.netty.logging.InternalLoggerFactory
import org.jboss.netty.logging.Slf4JLoggerFactory
/** Manages a local `sc` {@link SparkContext} variable, correctly stopping it after each test. */
trait LocalSparkContext extends BeforeAndAfterEach with BeforeAndAfterAll { self: Suite =>
@transient var sc: SparkContext = _
override def beforeAll() {
InternalLoggerFactory.setDefaultFactory(new Slf4JLoggerFactory());
super.beforeAll()
}
override def afterEach() {
resetSparkContext()
super.afterEach()
}
def resetSparkContext() = {
if (sc != null) {
LocalSparkContext.stop(sc)
sc = null
}
}
}
object LocalSparkContext {
def stop(sc: SparkContext) {
sc.stop()
// To avoid Akka rebinding to the same port, since it doesn't unbind immediately on shutdown
System.clearProperty("spark.driver.port")
System.clearProperty("spark.hostPort")
}
/** Runs `f` by passing in `sc` and ensures that `sc` is stopped. */
def withSpark[T](sc: SparkContext)(f: SparkContext => T) = {
try {
f(sc)
} finally {
stop(sc)
}
}
}
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