Pentaho Big Data Plugin: Hadoop Configuration Testing with ShrinkWrap and VFS

gistfile1.java

    // Create a test hadoop configuration "a"
    FileObject ramRoot = VFS.getManager().resolveFile(HADOOP_CONFIGURATIONS_PATH);
    FileObject aConfigFolder = ramRoot.resolveFile("hadoop-configurations/a");
    aConfigFolder.createFolder();
    assertEquals(FileType.FOLDER, aConfigFolder.getType());

    // Create the properties file for the configuration as hadoop-configurations/a/config.properties
    FileObject configFile = aConfigFolder.resolveFile("config.properties");
    Properties p = new Properties();
    p.setProperty("name", "Test Configuration A");
    p.setProperty("classpath", "");
    p.setProperty("library.path", "");
    p.store(configFile.getContent().getOutputStream(), "Test Configuration A");

    // Create the implementation jar
    FileObject implJar = aConfigFolder.resolveFile("a-config.jar");
    implJar.createFile();

    // Use ShrinkWrap to create the jar and write it out to VFS
    JavaArchive archive = ShrinkWrap.create(JavaArchive.class, "a-configuration.jar").addAsServiceProvider(
        HadoopShim.class, MockHadoopShim.class)
        .addClass(MockHadoopShim.class);        
    archive.as(ZipExporter.class).exportTo(implJar.getContent().getOutputStream());

And that's why we have exportTo(OutputStream);

:)