org.apache.hadoop.hive.ql.exec

Class UDFClassLoader

java.lang.Object

java.lang.ClassLoader

java.security.SecureClassLoader

java.net.URLClassLoader

org.apache.hadoop.hive.ql.exec.UDFClassLoader

All Implemented Interfaces:

Closeable, AutoCloseable

public class UDFClassLoader
extends URLClassLoader

UDFClassLoader is used to dynamically register udf (and related) jars This was introducted to fix HIVE-11878 Each session will have its own instance of UDFClassLoader This is to support HiveServer2 where there can be multiple active sessions. Addition/removal of jars/resources in one session should not affect other sessions.

Constructor Summary

Constructors

Constructor and Description
UDFClassLoader(URL[] urls)
UDFClassLoader(URL[] urls, ClassLoader parent)

Method Summary

Modifier and Type	Method and Description
void	addURL(URL url)
void	close()
boolean	isClosed() See URLClassLoader.close()

Methods inherited from class java.net.URLClassLoader

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, getResource, getResources, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, loadClass, 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

UDFClassLoader

public UDFClassLoader(URL[] urls)

UDFClassLoader

public UDFClassLoader(URL[] urls,
                      ClassLoader parent)

Method Detail

addURL

public void addURL(URL url)

Overrides:

addURL in class URLClassLoader

isClosed

public boolean isClosed()

See URLClassLoader.close()

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Overrides:

close in class URLClassLoader

Throws:

IOException