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LoaderRepository (JBoss/JMX API) - JBoss 4.0.1 sp1 jmx API Documentation 英文版文档

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org.jboss.mx.loading
Class LoaderRepository

java.lang.Object
  org.jboss.mx.loading.LoaderRepository

All Implemented Interfaces:

ClassLoaderRepository, ServerConstants

Direct Known Subclasses:

BasicLoaderRepository, UnifiedLoaderRepository3

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public abstract class LoaderRepository

extends Object

implements ServerConstants, ClassLoaderRepository

Abstract base class of all loader repository implementations

Version:

$Revision: 1.22 $

Author:

Juha Lindfors.

See Also:

BasicLoaderRepository

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Field Summary
protected static LoaderRepository	instance
protected static Vector	loaders
protected  org.jboss.util.loading.Translator	translator

 

Fields inherited from interface org.jboss.mx.server.ServerConstants

CLASS_REMOVED, CLASSLOADER, CLASSLOADER_ADDED, CLASSLOADER_REMOVED, DEFAULT_DOMAIN, DEFAULT_LOADER_NAME, DEFAULT_LOADER_REPOSITORY_CLASS, DEFAULT_MBEAN_REGISTRY_CLASS, DEFAULT_MBEAN_SERVER_BUILDER_CLASS, DEFAULT_REQUIRED_MODELMBEAN_CLASS, DEFAULT_SCOPED_REPOSITORY_CLASS, DEFAULT_SCOPED_REPOSITORY_PARSER_CLASS, IMPLEMENTATION_NAME, IMPLEMENTATION_VENDOR, IMPLEMENTATION_VERSION, JMI_DOMAIN, LOADER_REPOSITORY_CLASS_PROPERTY, MBEAN_REGISTRY, MBEAN_REGISTRY_CLASS_PROPERTY, MBEAN_SERVER_BUILDER_CLASS_PROPERTY, MBEAN_SERVER_CONFIGURATION, MBEAN_SERVER_DELEGATE, OPTIMIZE_REFLECTED_DISPATCHER, REQUIRED_MODELMBEAN_CLASS_PROPERTY, SPECIFICATION_NAME, SPECIFICATION_VENDOR, SPECIFICATION_VERSION, UNIFIED_LOADER_REPOSITORY_CLASS

 

Constructor Summary

LoaderRepository()

 

Method Summary
abstract  void	addClassLoader(ClassLoader cl)           Add a class loader to the repository
abstract  boolean	addClassLoaderURL(ClassLoader cl, URL url)           Update the set of URLs known to be associated with a previously added class loader.
int	compare(LoaderRepository lr)           Compare two loader repository, by default we do no special ordering
Class	getCachedClass(String classname)
Vector	getLoaders()
static Class	getNativeClassForName(String className)           Return the class of a java native type
abstract  URL	getResource(String name, ClassLoader cl)           Find a resource URL for the given name
abstract  void	getResources(String name, ClassLoader cl, List urls)           Find all resource URLs for the given name.
org.jboss.util.loading.Translator	getTranslator()
URL[]	getURLs()
abstract  Class	loadClass(String className)           Loads a class from the repository.
abstract  Class	loadClass(String name, boolean resolve, ClassLoader cl)           Load the given class from the repository
abstract  Class	loadClassBefore(ClassLoader stop, String className)           Loads a class from the repository, using the classloaders that were registered before the given classloader.
abstract  Class	loadClassWithout(ClassLoader loader, String className)           Loads a class from the repository, excluding the given classloader.
abstract  RepositoryClassLoader	newClassLoader(URL url, boolean addToRepository)           Create RepositoryClassLoader and optionally add it to the repository
abstract  RepositoryClassLoader	newClassLoader(URL url, URL origURL, boolean addToRepository)           Create RepositoryClassLoader and optionally add it to the repository
abstract  void	removeClassLoader(ClassLoader cl)           Remove a cladd loader from the repository.
protected  int	reverseCompare(LoaderRepository lr)           Allow subclasses to override the ordering
void	setTranslator(org.jboss.util.loading.Translator t)

 

Methods inherited from class java.lang.Object

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

 

Field Detail

loaders

protected static Vector loaders

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instance

protected static LoaderRepository instance

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translator

protected org.jboss.util.loading.Translator translator

Constructor Detail

LoaderRepository

public LoaderRepository()

Method Detail

getLoaders

public Vector getLoaders()

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getURLs

public URL[] getURLs()

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getCachedClass

public Class getCachedClass(String classname)

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getTranslator

public org.jboss.util.loading.Translator getTranslator()

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setTranslator

public void setTranslator(org.jboss.util.loading.Translator t)

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compare

public int compare(LoaderRepository lr)

Compare two loader repository, by default we do no special ordering

Parameters:

lr - the loader repository

Returns:

-1, 0, 1 depending upon the order

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loadClass

public abstract Class loadClass(String className)
                         throws ClassNotFoundException

Loads a class from the repository. This method attempts to load the class using all the classloader registered to the repository.

Specified by:

loadClass in interface ClassLoaderRepository

Parameters:

className - the class to load

Returns:

the found class

Throws:

ClassNotFoundException - when there is no such class

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loadClassWithout

public abstract Class loadClassWithout(ClassLoader loader,
                                       String className)
                                throws ClassNotFoundException

Loads a class from the repository, excluding the given classloader.

Specified by:

loadClassWithout in interface ClassLoaderRepository

Parameters:

loader - the classloader to exclude

className - the class to load

Returns:

the found class

Throws:

ClassNotFoundException - when there is no such class

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loadClassBefore

public abstract Class loadClassBefore(ClassLoader stop,
                                      String className)
                               throws ClassNotFoundException

Loads a class from the repository, using the classloaders that were registered before the given classloader.

Specified by:

loadClassBefore in interface ClassLoaderRepository

Parameters:

stop - consult all the classloaders registered before this one in an attempt to load a class

className - name of the class to load

Returns:

loaded class instance

Throws:

ClassNotFoundException - if none of the consulted classloaders were able to load the requested class

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newClassLoader

public abstract RepositoryClassLoader newClassLoader(URL url,
                                                     boolean addToRepository)
                                              throws Exception

Create RepositoryClassLoader and optionally add it to the repository

Parameters:

url - the URL to use for class loading

addToRepository - a flag indicating if the CL should be added to the repository

Returns:

the UCL instance

Throws:

Exception

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newClassLoader

public abstract RepositoryClassLoader newClassLoader(URL url,
                                                     URL origURL,
                                                     boolean addToRepository)
                                              throws Exception

Create RepositoryClassLoader and optionally add it to the repository

Parameters:

url - the URL to use for class loading

origURL - an orignal URL to use as the URL for the CL CodeSource. This is useful when the url is a local copy that is difficult to use for security policy writing.

addToRepository - a flag indicating if the CL should be added to the repository

Returns:

the CL instance

Throws:

Exception

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loadClass

public abstract Class loadClass(String name,
                                boolean resolve,
                                ClassLoader cl)
                         throws ClassNotFoundException

Load the given class from the repository

Parameters:

name -

resolve -

cl -

Returns:

Throws:

ClassNotFoundException

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getResource

public abstract URL getResource(String name,
                                ClassLoader cl)

Find a resource URL for the given name

Parameters:

name - the resource name

cl - the requesting class loader

Returns:

The resource URL if found, null otherwise

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getResources

public abstract void getResources(String name,
                                  ClassLoader cl,
                                  List urls)

Find all resource URLs for the given name. Since this typically entails an exhuastive search of the repository it can be a relatively slow operation.

Parameters:

name - the resource name

cl - the requesting class loader

urls - a list into which the located resource URLs will be placed

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addClassLoader

public abstract void addClassLoader(ClassLoader cl)

Add a class loader to the repository

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addClassLoaderURL

public abstract boolean addClassLoaderURL(ClassLoader cl,
                                          URL url)

Update the set of URLs known to be associated with a previously added class loader.

Parameters:

cl -

url -

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removeClassLoader

public abstract void removeClassLoader(ClassLoader cl)

Remove a cladd loader from the repository.

Parameters:

cl -

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getNativeClassForName

public static final Class getNativeClassForName(String className)

Return the class of a java native type

Returns:

the class, or null if className is not a native class name

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reverseCompare

protected int reverseCompare(LoaderRepository lr)

Allow subclasses to override the ordering

Parameters:

lr - the loader repository

Returns:

-1, 0, 1 depending upon the order

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