org.apache.hadoop.hive.ql.exec

Class AddToClassPathAction

java.lang.Object

org.apache.hadoop.hive.ql.exec.AddToClassPathAction

All Implemented Interfaces:

PrivilegedAction<UDFClassLoader>

public class AddToClassPathAction
extends Object
implements PrivilegedAction<UDFClassLoader>

Helper class to create UDFClassLoader when running under a security manager. To create a class loader: > AddToClassPathAction addAction = new AddToClassPathAction(parentLoader, newPaths, true); > UDFClassLoader childClassLoader = AccessController.doPrivileged(addAction); To try to add to the class path of the existing class loader; call the above without forceNewClassLoader=true. Note that a class loader might be still created as fallback method.

This is slightly inconvenient, but forces the caller code to make the doPrivileged call, rather than us making the call on the caller's behalf, in accordance with the security guidelines at: https://docs.oracle.com/javase/8/docs/technotes/guides/security/doprivileged.html

Constructor Summary

Constructors

Constructor and Description
AddToClassPathAction(ClassLoader parentLoader, Collection<String> newPaths)
AddToClassPathAction(ClassLoader parentLoader, Collection<String> newPaths, boolean forceNewClassLoader)

Method Summary

Modifier and Type	Method and Description
UDFClassLoader	run()

Methods inherited from class java.lang.Object

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

Constructor Detail

AddToClassPathAction

public AddToClassPathAction(ClassLoader parentLoader,
                            Collection<String> newPaths,
                            boolean forceNewClassLoader)

AddToClassPathAction

public AddToClassPathAction(ClassLoader parentLoader,
                            Collection<String> newPaths)

Method Detail

run

public UDFClassLoader run()

Specified by:

run in interface PrivilegedAction<UDFClassLoader>