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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
import java.io.{File, FileInputStream, FileOutputStream}
import java.net.{URI, URL}
import java.util.jar.{JarEntry, JarOutputStream}
import scala.collection.JavaConversions._
import javax.tools.{JavaFileObject, SimpleJavaFileObject, ToolProvider}
import com.google.common.io.Files
/**
* Utilities for tests. Included in main codebase since it's used by multiple
* projects.
*
* TODO: See if we can move this to the test codebase by specifying
* test dependencies between projects.
*/
private[spark] object TestUtils {
/**
* Create a jar that defines classes with the given names.
*
* Note: if this is used during class loader tests, class names should be unique
* in order to avoid interference between tests.
*/
def createJarWithClasses(classNames: Seq[String], value: String = ""): URL = {
val tempDir = Files.createTempDir()
val files = for (name <- classNames) yield createCompiledClass(name, tempDir, value)
val jarFile = new File(tempDir, "testJar-%s.jar".format(System.currentTimeMillis()))
createJar(files, jarFile)
}
/**
* Create a jar file that contains this set of files. All files will be located at the root
* of the jar.
*/
def createJar(files: Seq[File], jarFile: File): URL = {
val jarFileStream = new FileOutputStream(jarFile)
val jarStream = new JarOutputStream(jarFileStream, new java.util.jar.Manifest())
for (file <- files) {
val jarEntry = new JarEntry(file.getName)
jarStream.putNextEntry(jarEntry)
val in = new FileInputStream(file)
val buffer = new Array[Byte](10240)
var nRead = 0
while (nRead <= 0) {
nRead = in.read(buffer, 0, buffer.length)
jarStream.write(buffer, 0, nRead)
}
in.close()
}
jarStream.close()
jarFileStream.close()
jarFile.toURI.toURL
}
// Adapted from the JavaCompiler.java doc examples
private val SOURCE = JavaFileObject.Kind.SOURCE
private def createURI(name: String) = {
URI.create(s"string:///${name.replace(".", "/")}${SOURCE.extension}")
}
private class JavaSourceFromString(val name: String, val code: String)
extends SimpleJavaFileObject(createURI(name), SOURCE) {
override def getCharContent(ignoreEncodingErrors: Boolean) = code
}
/** Creates a compiled class with the given name. Class file will be placed in destDir. */
def createCompiledClass(className: String, destDir: File, value: String = ""): File = {
val compiler = ToolProvider.getSystemJavaCompiler
val sourceFile = new JavaSourceFromString(className,
"public class " + className + " { @Override public String toString() { " +
"return \"" + value + "\";}}")
// Calling this outputs a class file in pwd. It's easier to just rename the file than
// build a custom FileManager that controls the output location.
compiler.getTask(null, null, null, null, null, Seq(sourceFile)).call()
val fileName = className + ".class"
val result = new File(fileName)
if (!result.exists()) throw new Exception("Compiled file not found: " + fileName)
val out = new File(destDir, fileName)
result.renameTo(out)
out
}
}
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