Examples with FilterClassLoader co.cask.cdap.common.lang.FilterClassLoader used on opensource projects

Example 1 with FilterClassLoader

use of co.cask.cdap.common.lang.FilterClassLoader in project cdap by caskdata.

the class SparkRuntimeContextProvider method createProgram.

private static Program createProgram(CConfiguration cConf, SparkRuntimeContextConfig contextConfig) throws IOException {
    File programJar = new File(PROGRAM_JAR_NAME);
    File programDir = new File(PROGRAM_JAR_EXPANDED_NAME);
    ClassLoader parentClassLoader = new FilterClassLoader(SparkRuntimeContextProvider.class.getClassLoader(), SparkRuntimeUtils.SPARK_PROGRAM_CLASS_LOADER_FILTER);
    ClassLoader classLoader = new ProgramClassLoader(cConf, programDir, parentClassLoader);
    return new DefaultProgram(new ProgramDescriptor(contextConfig.getProgramId(), contextConfig.getApplicationSpecification()), Locations.toLocation(programJar), classLoader);
}

Example 2 with FilterClassLoader

use of co.cask.cdap.common.lang.FilterClassLoader in project cdap by caskdata.

the class MainClassLoader method createFromContext.

/**
   * @param filter A {@link FilterClassLoader.Filter} for filtering out classes from the
   * @param extraClasspath extra list of {@link URL} to be added to the end of the classpath for the
   *                       {@link MainClassLoader} to be created
   * @return a new instance from the current context classloader or the system classloader. The returned
   * {@link MainClassLoader} will be the defining classloader for classes in the context classloader
   * that the filter rejected. For classes that pass the filter, the defining classloader will be the original
   * context classloader.
   * It will return {@code null} if it is not able to create a new instance due to lack of classpath information.
   */
@Nullable
public static MainClassLoader createFromContext(FilterClassLoader.Filter filter, URL... extraClasspath) {
    ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
    if (classLoader == null) {
        classLoader = ClassLoader.getSystemClassLoader();
    }
    List<URL> classpath = new ArrayList<>();
    if (classLoader instanceof URLClassLoader) {
        classpath.addAll(Arrays.asList(((URLClassLoader) classLoader).getURLs()));
    } else if (classLoader == ClassLoader.getSystemClassLoader()) {
        addClassPath(classpath);
    } else {
        // No able to create a new MainClassLoader
        return null;
    }
    classpath.addAll(Arrays.asList(extraClasspath));
    ClassLoader filtered = new FilterClassLoader(classLoader, filter);
    ClassLoader parent = new CombineClassLoader(classLoader.getParent(), Collections.singleton(filtered));
    return new MainClassLoader(classpath.toArray(new URL[classpath.size()]), parent);
}

Example 3 with FilterClassLoader

use of co.cask.cdap.common.lang.FilterClassLoader in project cdap by caskdata.

the class AuthorizerClassLoader method createParent.

@VisibleForTesting
static ClassLoader createParent() {
    ClassLoader baseClassLoader = AuthorizerClassLoader.class.getClassLoader();
    final Set<String> authorizerResources = traceSecurityDependencies(baseClassLoader);
    // by default, FilterClassLoader's defaultFilter allows all hadoop classes, which makes it so that
    // the authorizer extension can share the same instance of UserGroupInformation. This allows kerberos credential
    // renewal to also renew for any extension
    final FilterClassLoader.Filter defaultFilter = FilterClassLoader.defaultFilter();
    return new FilterClassLoader(baseClassLoader, new FilterClassLoader.Filter() {

        @Override
        public boolean acceptResource(String resource) {
            return defaultFilter.acceptResource(resource) || authorizerResources.contains(resource);
        }

        @Override
        public boolean acceptPackage(String packageName) {
            return true;
        }
    });
}

Example 4 with FilterClassLoader

use of co.cask.cdap.common.lang.FilterClassLoader in project cdap by caskdata.

the class SparkContainerLauncher method launch.

/**
   * Launches the given main class. The main class will be loaded through the {@link SparkContainerClassLoader}.
   *
   * @param mainClassName the main class to launch
   * @param args arguments for the main class
   */
@SuppressWarnings("unused")
public static void launch(String mainClassName, String[] args) throws Exception {
    Thread.setDefaultUncaughtExceptionHandler(new UncaughtExceptionHandler());
    ClassLoader systemClassLoader = ClassLoader.getSystemClassLoader();
    Set<URL> urls = ClassLoaders.getClassLoaderURLs(systemClassLoader, new LinkedHashSet<URL>());
    // Remove the URL that contains the given main classname to avoid infinite recursion.
    // This is needed because we generate a class with the same main classname in order to intercept the main()
    // method call from the container launch script.
    urls.remove(getURLByClass(systemClassLoader, mainClassName));
    // Remove the first scala from the set of classpath. This ensure the one from Spark is used for spark
    URL scalaURL = getURLByClass(systemClassLoader, "scala.language");
    Enumeration<URL> resources = systemClassLoader.getResources("scala/language.class");
    // Only remove the scala if there are more than one in the classpath
    int count = 0;
    while (resources.hasMoreElements()) {
        resources.nextElement();
        count++;
    }
    if (count > 1) {
        urls.remove(scalaURL);
    }
    // First create a FilterClassLoader that only loads JVM and kafka classes from the system classloader
    // This is to isolate the scala library from children
    ClassLoader parentClassLoader = new FilterClassLoader(systemClassLoader, KAFKA_FILTER);
    // Creates the SparkRunnerClassLoader for class rewriting and it will be used for the rest of the execution.
    // Use the extension classloader as the parent instead of the system classloader because
    // Spark classes are in the system classloader which we want to rewrite.
    ClassLoader classLoader = new SparkContainerClassLoader(urls.toArray(new URL[urls.size()]), parentClassLoader);
    // Sets the context classloader and launch the actual Spark main class.
    Thread.currentThread().setContextClassLoader(classLoader);
    // Install the JUL to SLF4J Bridge
    try {
        classLoader.loadClass(SLF4JBridgeHandler.class.getName()).getDeclaredMethod("install").invoke(null);
    } catch (Exception e) {
        // Log the error and continue
        LOG.warn("Failed to invoke SLF4JBridgeHandler.install() required for jul-to-slf4j bridge", e);
    }
    try {
        // Get the SparkRuntimeContext to initialize all necessary services and logging context
        // Need to do it using the SparkRunnerClassLoader through reflection.
        classLoader.loadClass(SparkRuntimeContextProvider.class.getName()).getMethod("get").invoke(null);
        // Invoke StandardOutErrorRedirector.redirectToLogger()
        classLoader.loadClass(StandardOutErrorRedirector.class.getName()).getDeclaredMethod("redirectToLogger", String.class).invoke(null, mainClassName);
        // which causes executor logs attempt to write to driver log directory
        if (System.getProperty("spark.executorEnv.CDAP_LOG_DIR") != null) {
            System.setProperty("spark.executorEnv.CDAP_LOG_DIR", "<LOG_DIR>");
        }
        LOG.info("Launch main class {}.main({})", mainClassName, Arrays.toString(args));
        classLoader.loadClass(mainClassName).getMethod("main", String[].class).invoke(null, new Object[] { args });
        LOG.info("Main method returned {}", mainClassName);
    } catch (Throwable t) {
        // LOG the exception since this exception will be propagated back to JVM
        // and kill the main thread (hence the JVM process).
        // If we don't log it here as ERROR, it will be logged by UncaughtExceptionHandler as DEBUG level
        LOG.error("Exception raised when calling {}.main(String[]) method", mainClassName, t);
        throw t;
    }
}