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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.util
import java.io.{File, IOException}
import scala.io.Source
import org.apache.hadoop.fs.Path
import org.scalatest.{BeforeAndAfter, FunSuite}
import org.apache.spark.SparkConf
import org.apache.spark.deploy.SparkHadoopUtil
import org.apache.spark.io.CompressionCodec
/**
* Test writing files through the FileLogger.
*/
class FileLoggerSuite extends FunSuite with BeforeAndAfter {
private val fileSystem = Utils.getHadoopFileSystem("/",
SparkHadoopUtil.get.newConfiguration(new SparkConf()))
private val allCompressionCodecs = Seq[String](
"org.apache.spark.io.LZFCompressionCodec",
"org.apache.spark.io.SnappyCompressionCodec"
)
private var testDir: File = _
private var logDirPath: Path = _
private var logDirPathString: String = _
before {
testDir = Utils.createTempDir()
logDirPath = Utils.getFilePath(testDir, "test-file-logger")
logDirPathString = logDirPath.toString
}
after {
Utils.deleteRecursively(testDir)
}
test("Simple logging") {
testSingleFile()
}
test ("Simple logging with compression") {
allCompressionCodecs.foreach { codec =>
testSingleFile(Some(codec))
}
}
test("Logging multiple files") {
testMultipleFiles()
}
test("Logging multiple files with compression") {
allCompressionCodecs.foreach { codec =>
testMultipleFiles(Some(codec))
}
}
test("Logging when directory already exists") {
// Create the logging directory multiple times
new FileLogger(logDirPathString, new SparkConf, compress = false, overwrite = true).start()
new FileLogger(logDirPathString, new SparkConf, compress = false, overwrite = true).start()
new FileLogger(logDirPathString, new SparkConf, compress = false, overwrite = true).start()
// If overwrite is not enabled, an exception should be thrown
intercept[IOException] {
new FileLogger(logDirPathString, new SparkConf, compress = false, overwrite = false).start()
}
}
/* ----------------- *
* Actual test logic *
* ----------------- */
/**
* Test logging to a single file.
*/
private def testSingleFile(codecName: Option[String] = None) {
val conf = getLoggingConf(codecName)
val codec = codecName.map { c => CompressionCodec.createCodec(conf) }
val logger =
if (codecName.isDefined) {
new FileLogger(logDirPathString, conf, compress = true)
} else {
new FileLogger(logDirPathString, conf)
}
logger.start()
assert(fileSystem.exists(logDirPath))
assert(fileSystem.getFileStatus(logDirPath).isDir)
assert(fileSystem.listStatus(logDirPath).size === 0)
logger.newFile()
val files = fileSystem.listStatus(logDirPath)
assert(files.size === 1)
val firstFile = files.head
val firstFilePath = firstFile.getPath
logger.log("hello")
logger.flush()
assert(readFileContent(firstFilePath, codec) === "hello")
logger.log(" world")
logger.close()
assert(readFileContent(firstFilePath, codec) === "hello world")
}
/**
* Test logging to multiple files.
*/
private def testMultipleFiles(codecName: Option[String] = None) {
val conf = getLoggingConf(codecName)
val codec = codecName.map { c => CompressionCodec.createCodec(conf) }
val logger =
if (codecName.isDefined) {
new FileLogger(logDirPathString, conf, compress = true)
} else {
new FileLogger(logDirPathString, conf)
}
logger.start()
logger.newFile("Jean_Valjean")
logger.logLine("Who am I?")
logger.logLine("Destiny?")
logger.newFile("John_Valjohn")
logger.logLine("One")
logger.logLine("Two three...")
logger.newFile("Wolverine")
logger.logLine("There was a time")
logger.logLine("A time when our enemies knew honor.")
logger.close()
assert(readFileContent(new Path(logDirPath, "Jean_Valjean"), codec) === "Who am I?\nDestiny?")
assert(readFileContent(new Path(logDirPath, "John_Valjohn"), codec) === "One\nTwo three...")
assert(readFileContent(new Path(logDirPath, "Wolverine"), codec) ===
"There was a time\nA time when our enemies knew honor.")
}
/**
* Read the content of the file specified by the given path.
* If a compression codec is specified, use it to read the file.
*/
private def readFileContent(logPath: Path, codec: Option[CompressionCodec] = None): String = {
val fstream = fileSystem.open(logPath)
val cstream = codec.map(_.compressedInputStream(fstream)).getOrElse(fstream)
Source.fromInputStream(cstream).getLines().mkString("\n")
}
private def getLoggingConf(codecName: Option[String]) = {
val conf = new SparkConf
codecName.foreach { c => conf.set("spark.io.compression.codec", c) }
conf
}
}
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