org.apache.hadoop.yarn.util

Class ApplicationClassLoader

java.lang.Object

java.lang.ClassLoader

java.security.SecureClassLoader

java.net.URLClassLoader

org.apache.hadoop.yarn.util.ApplicationClassLoader

All Implemented Interfaces:

Closeable, AutoCloseable

@InterfaceAudience.Public
@InterfaceStability.Unstable
public class ApplicationClassLoader
extends URLClassLoader

A URLClassLoader for YARN application isolation. Classes from the application JARs are loaded in preference to the parent loader.

Constructor Summary

Constructors

Constructor and Description
ApplicationClassLoader(String classpath, ClassLoader parent, List<String> systemClasses)
ApplicationClassLoader(URL[] urls, ClassLoader parent, List<String> systemClasses)

Method Summary

Methods

Modifier and Type	Method and Description
URL	getResource(String name)
static boolean	isSystemClass(String name, List<String> systemClasses)
Class<?>	loadClass(String name)
protected Class<?>	loadClass(String name, boolean resolve)

Methods inherited from class java.net.URLClassLoader

addURL, close, definePackage, findClass, findResource, findResources, getPermissions, getResourceAsStream, getURLs, newInstance, newInstance

Methods inherited from class java.security.SecureClassLoader

defineClass, defineClass

Methods inherited from class java.lang.ClassLoader

clearAssertionStatus, defineClass, defineClass, defineClass, defineClass, definePackage, findLibrary, findLoadedClass, findSystemClass, getClassLoadingLock, getPackage, getPackages, getParent, getResources, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, registerAsParallelCapable, resolveClass, setClassAssertionStatus, setDefaultAssertionStatus, setPackageAssertionStatus, setSigners

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ApplicationClassLoader

public ApplicationClassLoader(URL[] urls,
                      ClassLoader parent,
                      List<String> systemClasses)

ApplicationClassLoader

public ApplicationClassLoader(String classpath,
                      ClassLoader parent,
                      List<String> systemClasses)
                       throws MalformedURLException

Throws:

MalformedURLException

Method Detail

getResource

public URL getResource(String name)

Overrides:

getResource in class ClassLoader

loadClass

public Class<?> loadClass(String name)
                   throws ClassNotFoundException

Overrides:

loadClass in class ClassLoader

Throws:

ClassNotFoundException

loadClass

protected Class<?> loadClass(String name,
                 boolean resolve)
                      throws ClassNotFoundException

Overrides:

loadClass in class ClassLoader

Throws:

ClassNotFoundException

isSystemClass

public static boolean isSystemClass(String name,
                    List<String> systemClasses)