alluxio.extensions

Class ExtensionsClassLoader

java.lang.Object

java.lang.ClassLoader

java.security.SecureClassLoader

java.net.URLClassLoader

alluxio.extensions.ExtensionsClassLoader

All Implemented Interfaces:

Closeable, AutoCloseable

public class ExtensionsClassLoader
extends URLClassLoader

An isolated ClassLoader for loading extensions to core Alluxio. This class loader first scans the provided URLs to define a class and in case the class is not found it will fallback to the provided default class loader.

Constructor Summary

Constructors

Constructor and Description
ExtensionsClassLoader(URL[] urls, ClassLoader defaultClassLoader)

Method Summary

Modifier and Type	Method and Description
void	addPath(String path) Adds a path where the class loader can load resource from.
protected Class<?>	findClass(String name)
Enumeration<URL>	getResources(String name)
Class<?>	loadClass(String name, boolean resolve)

Methods inherited from class java.net.URLClassLoader

addURL, close, definePackage, 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, getResource, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, loadClass, 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

ExtensionsClassLoader

public ExtensionsClassLoader(URL[] urls,
                             ClassLoader defaultClassLoader)

Parameters:

urls - array of URLs of jars

defaultClassLoader - the default class loader to fall back

Method Detail

findClass

protected Class<?> findClass(String name)
                      throws ClassNotFoundException

Overrides:

findClass in class URLClassLoader

Throws:

ClassNotFoundException

loadClass

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

Overrides:

loadClass in class ClassLoader

Throws:

ClassNotFoundException

getResources

public Enumeration<URL> getResources(String name)
                              throws IOException

Overrides:

getResources in class ClassLoader

Throws:

IOException

addPath

public void addPath(String path)
             throws MalformedURLException

Adds a path where the class loader can load resource from.

Parameters:

path - the path to add

Throws:

MalformedURLException