org.apache.nifi.nar

Class NarCloseable

java.lang.Object

org.apache.nifi.nar.NarCloseable

All Implemented Interfaces:

Closeable, AutoCloseable

public class NarCloseable
extends Object
implements Closeable

Field Summary

Fields

Modifier and Type	Field and Description
private static org.slf4j.Logger	logger
private ClassLoader	toSet

Constructor Summary

Constructors

Modifier	Constructor and Description
private	NarCloseable(ClassLoader toSet)

Method Summary

Modifier and Type	Method and Description
void	close()
static NarCloseable	withComponentNarLoader(ClassLoader componentNarLoader) Sets the current thread context class loader to the provided class loader, and returns a NarCloseable that will return the current thread context class loader to it's previous state.
static NarCloseable	withComponentNarLoader(ExtensionManager extensionManager, Class componentClass, String componentIdentifier) Sets the current thread context class loader to the specific appropriate class loader for the given component.
static NarCloseable	withFrameworkNar() Creates a Closeable object that can be used to to switch to current class loader to the framework class loader and will automatically set the ClassLoader back to the previous class loader when closed
static NarCloseable	withNarLoader()

Methods inherited from class java.lang.Object

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

Field Detail

logger

private static final org.slf4j.Logger logger

toSet

private final ClassLoader toSet

Constructor Detail

NarCloseable

private NarCloseable(ClassLoader toSet)

Method Detail

withNarLoader

public static NarCloseable withNarLoader()

withComponentNarLoader

public static NarCloseable withComponentNarLoader(ExtensionManager extensionManager,
                                                  Class componentClass,
                                                  String componentIdentifier)

Sets the current thread context class loader to the specific appropriate class loader for the given component. If the component requires per-instance class loading then the class loader will be the specific class loader for instance with the given identifier, otherwise the class loader will be the NARClassLoader.

Parameters:

componentClass - the component class

componentIdentifier - the identifier of the component

Returns:

NarCloseable with the current thread context classloader jailed to the Nar or instance class loader of the component

withComponentNarLoader

public static NarCloseable withComponentNarLoader(ClassLoader componentNarLoader)

Sets the current thread context class loader to the provided class loader, and returns a NarCloseable that will return the current thread context class loader to it's previous state.

Parameters:

componentNarLoader - the class loader to set as the current thread context class loader

Returns:

NarCloseable that will return the current thread context class loader to its previous state

withFrameworkNar

public static NarCloseable withFrameworkNar()

Creates a Closeable object that can be used to to switch to current class loader to the framework class loader and will automatically set the ClassLoader back to the previous class loader when closed

Returns:

a NarCloseable

close

public void close()

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable