UnifiedLoaderRepository3 (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 UnifiedLoaderRepository3

java.lang.Object
  org.jboss.mx.loading.LoaderRepository
      org.jboss.mx.loading.UnifiedLoaderRepository3

All Implemented Interfaces:: ClassLoaderRepository, MBeanRegistration, NotificationBroadcaster, NotificationEmitter, ServerConstants, UnifiedLoaderRepository3MBean, UnifiedLoaderRepositoryMBean

Direct Known Subclasses:: HeirarchicalLoaderRepository3

public class UnifiedLoaderRepository3
extends LoaderRepository
implements MBeanRegistration, NotificationEmitter, UnifiedLoaderRepository3MBean

A repository of class loaders that form a flat namespace of classes and resources. This version uses UnifiedClassLoader3 instances. Class and resource loading is synchronized by the acquiring the monitor to the associated repository structure monitor. See the variable javadoc comments for what monitor is used to access a given structure.

Version:: $Revision: 1.30.4.1 $ just a hint... xdoclet not really used
Author:: Scott Stark., Adrian Brock.

Field Summary

Fields inherited from class org.jboss.mx.loading.LoaderRepository

instance, loaders, 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

UnifiedLoaderRepository3()


Method Summary

void addClassLoader(ClassLoader loader)
          Add a class loader to the repository.

boolean addClassLoaderURL(ClassLoader cl, URL url)
          Update the set of URLs known to be associated with a previously added class loader.

void addNotificationListener(NotificationListener listener, NotificationFilter filter, Object handback)
          addNotificationListener delegates to the broadcaster object we hold.

void cacheLoadedClass(String name, Class cls, ClassLoader cl)
          Add a Class to the repository cache.

String displayClassInfo(String className)
          A utility method that iterates over all repository class loaders and display the class information for every UCL that contains the given className

void flush()
          Flush the ULR classes cache

Class getCachedClass(String classname)


int getCacheSize()
          Get the number of classes loaded into the ULR cache.

int getClassLoadersSize()
          Get the number of UnifiedClassLoader3s (UCLs) in the ULR

LoaderRepository getInstance()


MBeanNotificationInfo[] getNotificationInfo()
          Returns the notification metadata associated with the MBean.

Set getPackageClassLoaders(String className)
          Called by LoadMgr to obtain all class loaders for the given className

URL getResource(String name, ClassLoader cl)
          Loads a resource following the Unified ClassLoader architecture

protected URL getResourceFromGlobalCache(String name)
          Check for a resource in the global cache Synchronizes access to globalResources using the loaderToResourcesMap monitor

protected URL getResourceFromRepository(String name, ClassLoader cl)


void getResources(String name, ClassLoader cl, List urls)
          Find all resource URLs for the given name.

URL[] getURLs()
          This is a utility method a listing of the URL for all UnifiedClassLoaders associated with the repository.

RepositoryClassLoader getWrappingClassLoader(ClassLoader cl)
          Get any wrapping classloader for the passed classloader

Class loadClass(String className)
          First tries to load from any UCL in the ULR, and if the class is not found, next tries the current thread context class loader.

Class loadClass(String name, boolean resolve, ClassLoader cl)
          Unlike other implementations of LoaderRepository, this method does nothing but ask the UnifiedClassLoader3 to load the class as UCL3s do not use this method.

Class loadClassBefore(ClassLoader stop, String className)
          Loads a class from the repository, using the classloaders that were registered before the given classloader.

Class loadClassFromCache(String name)
          Lookup a Class from the repository cache.

Class loadClassWithout(ClassLoader loader, String className)
          Loads a class from the repository, excluding the given classloader.

RepositoryClassLoader newClassLoader(URL url, boolean addToRepository)
          Create RepositoryClassLoader and optionally add it to the repository

RepositoryClassLoader newClassLoader(URL url, URL origURL, boolean addToRepository)
          Create RepositoryClassLoader and optionally add it to the repository

void postDeregister()
          This method is called by the MBeanServer after deregistration takes place.

void postRegister(Boolean registrationDone)
          This method is called by the MBeanServer after registration takes place or when registration fails.

void preDeregister()
          This method is called by the MBeanServer before deregistration takes place.

ObjectName preRegister(MBeanServer server, ObjectName name)
          This method is called by the MBeanServer before registration takes place.

LoaderRepository registerClassLoader(RepositoryClassLoader ucl)
          This method provides an mbean-accessible way to add a UnifiedClassloader, and sends a notification when it is added.

void removeClassLoader(ClassLoader loader)
          Remove the class loader from the repository.

void removeNotificationListener(NotificationListener listener)
          removeNotificationListener delegates to our broadcaster object

void removeNotificationListener(NotificationListener listener, NotificationFilter filter, Object handback)
          Removes a listener from the Emitter.

Methods inherited from class org.jboss.mx.loading.LoaderRepository

compare, getLoaders, getNativeClassForName, getTranslator, reverseCompare, setTranslator

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.jboss.mx.loading.UnifiedLoaderRepositoryMBean

getTranslator, setTranslator

Constructor Detail

UnifiedLoaderRepository3

public UnifiedLoaderRepository3()

Method Detail

newClassLoader

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

Description copied from class: LoaderRepository

Create RepositoryClassLoader and optionally add it to the repository

Specified by:: newClassLoader in interface UnifiedLoaderRepositoryMBean
Specified by:: newClassLoader in class LoaderRepository

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

newClassLoader

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

Description copied from class: LoaderRepository

Create RepositoryClassLoader and optionally add it to the repository

Specified by:: newClassLoader in interface UnifiedLoaderRepositoryMBean
Specified by:: newClassLoader in class LoaderRepository

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

getCacheSize

public int getCacheSize()

Description copied from interface: UnifiedLoaderRepository3MBean

Get the number of classes loaded into the ULR cache.

Specified by:: getCacheSize in interface UnifiedLoaderRepository3MBean

Returns:: the classes cache size.

getClassLoadersSize

public int getClassLoadersSize()

Description copied from interface: UnifiedLoaderRepository3MBean

Get the number of UnifiedClassLoader3s (UCLs) in the ULR

Specified by:: getClassLoadersSize in interface UnifiedLoaderRepository3MBean

Returns:: the number of UCLs in the ULR

flush

public void flush()

Description copied from interface: UnifiedLoaderRepository3MBean

Flush the ULR classes cache

Specified by:: flush in interface UnifiedLoaderRepository3MBean

getCachedClass

public Class getCachedClass(String classname)

Overrides:: getCachedClass in class LoaderRepository

loadClass

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

Unlike other implementations of LoaderRepository, this method does nothing but ask the UnifiedClassLoader3 to load the class as UCL3s do not use this method.

Specified by:: loadClass in class LoaderRepository

Parameters:: name -; resolve -; cl -
Returns:
Throws:: ClassNotFoundException

getPackageClassLoaders

public Set getPackageClassLoaders(String className)

Called by LoadMgr to obtain all class loaders for the given className

Specified by:: getPackageClassLoaders in interface UnifiedLoaderRepository3MBean

Returns:: Set, may be null

loadClassFromCache

public Class loadClassFromCache(String name)

Lookup a Class from the repository cache.

Parameters:: name - the fully qualified class name
Returns:: the cached Class if found, null otherwise

cacheLoadedClass

public void cacheLoadedClass(String name,
                             Class cls,
                             ClassLoader cl)

Add a Class to the repository cache.

Parameters:: name - the fully qualified class name; cls - the Class instance; cl - the repository UCL

getResource

public URL getResource(String name,
                       ClassLoader cl)

Loads a resource following the Unified ClassLoader architecture

Specified by:: getResource in class LoaderRepository

Parameters:: name - the resource name; cl - the requesting class loader
Returns:: The resource URL if found, null otherwise

getResources

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

Find all resource URLs for the given name. This is entails an exhuastive search of the repository and is an expensive operation.

Specified by:: getResources in class LoaderRepository

Parameters:: name - the resource name; cl - the requesting class loader; urls - a list into which the located resource URLs will be placed

getResourceFromGlobalCache

protected URL getResourceFromGlobalCache(String name)

Check for a resource in the global cache Synchronizes access to globalResources using the loaderToResourcesMap monitor

Parameters:: name -
Returns:

getResourceFromRepository

protected URL getResourceFromRepository(String name,
                                        ClassLoader cl)

getURLs

public URL[] getURLs()

This is a utility method a listing of the URL for all UnifiedClassLoaders associated with the repository. It is never called in response to class or resource loading.

Specified by:: getURLs in interface UnifiedLoaderRepositoryMBean
Overrides:: getURLs in class LoaderRepository

displayClassInfo

public String displayClassInfo(String className)

A utility method that iterates over all repository class loaders and display the class information for every UCL that contains the given className

Specified by:: displayClassInfo in interface UnifiedLoaderRepository3MBean

loadClass

public Class loadClass(String className)
                throws ClassNotFoundException

First tries to load from any UCL in the ULR, and if the class is not found, next tries the current thread context class loader.

Specified by:: loadClass in interface ClassLoaderRepository
Specified by:: loadClass in class LoaderRepository

Parameters:: className - - the class to load
Returns:: the found class
Throws:: ClassNotFoundException - when there is no such class

loadClassWithout

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

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

Specified by:: loadClassWithout in interface ClassLoaderRepository
Specified by:: loadClassWithout in class LoaderRepository

Parameters:: loader - the classloader to exclude; className - the class to load
Returns:: the found class
Throws:: ClassNotFoundException - when there is no such class

loadClassBefore

public 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
Specified by:: loadClassBefore in class LoaderRepository

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

getWrappingClassLoader

public RepositoryClassLoader getWrappingClassLoader(ClassLoader cl)

Get any wrapping classloader for the passed classloader

Specified by:: getWrappingClassLoader in interface UnifiedLoaderRepositoryMBean

Parameters:: cl - the wrapped classloader
Returns:: the wrapping classloader or null if not wrapped

addClassLoader

public void addClassLoader(ClassLoader loader)

Add a class loader to the repository.

Specified by:: addClassLoader in class LoaderRepository

addClassLoaderURL

public boolean addClassLoaderURL(ClassLoader cl,
                                 URL url)

Description copied from class: LoaderRepository

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

Specified by:: addClassLoaderURL in class LoaderRepository

Parameters:: cl -; url -

removeClassLoader

public void removeClassLoader(ClassLoader loader)

Remove the class loader from the repository. This synchronizes on the this.classLoaders

Specified by:: removeClassLoader in interface UnifiedLoaderRepositoryMBean
Specified by:: removeClassLoader in class LoaderRepository

Parameters:: loader -

registerClassLoader

public LoaderRepository registerClassLoader(RepositoryClassLoader ucl)

This method provides an mbean-accessible way to add a UnifiedClassloader, and sends a notification when it is added.

Specified by:: registerClassLoader in interface UnifiedLoaderRepositoryMBean

Parameters:: ucl - an UnifiedClassLoader value
Returns:: a LoaderRepository value

getInstance

public LoaderRepository getInstance()

Specified by:: getInstance in interface UnifiedLoaderRepositoryMBean

addNotificationListener

public void addNotificationListener(NotificationListener listener,
                                    NotificationFilter filter,
                                    Object handback)
                             throws IllegalArgumentException

addNotificationListener delegates to the broadcaster object we hold.

Specified by:: addNotificationListener in interface NotificationBroadcaster

Parameters:: listener - a NotificationListener value; filter - a NotificationFilter value; handback - an Object value
Throws:: IllegalArgumentException - if an error occurs

getNotificationInfo

public MBeanNotificationInfo[] getNotificationInfo()

Description copied from interface: NotificationBroadcaster

Returns the notification metadata associated with the MBean.

Specified by:: getNotificationInfo in interface NotificationBroadcaster

Returns:
See Also:: MBeanNotificationInfo

removeNotificationListener

public void removeNotificationListener(NotificationListener listener)
                                throws ListenerNotFoundException

removeNotificationListener delegates to our broadcaster object

Specified by:: removeNotificationListener in interface NotificationBroadcaster

Parameters:: listener - a NotificationListener value
Throws:: ListenerNotFoundException - if an error occurs

removeNotificationListener

public void removeNotificationListener(NotificationListener listener,
                                       NotificationFilter filter,
                                       Object handback)
                                throws ListenerNotFoundException

Description copied from interface: NotificationEmitter

Removes a listener from the Emitter.

Only the listener, filter, handback triplet is removed

Specified by:: removeNotificationListener in interface NotificationEmitter

Parameters:: listener - the listener object to remove; filter - the filter registered with the listener; handback - the handback object associated with the registered listener
Throws:: ListenerNotFoundException - if the listener was not found

preRegister

public ObjectName preRegister(MBeanServer server,
                              ObjectName name)
                       throws Exception

Description copied from interface: MBeanRegistration

This method is called by the MBeanServer before registration takes place. The MBean is passed a reference of the MBeanServer it is about to be registered with. The MBean must return the ObjectName it will be registered with. The MBeanServer can pass a suggested object depending upon how the MBean is registered.

The MBean can stop the registration by throwing an exception.The exception is forwarded to the invoker wrapped in an MBeanRegistrationException.

Specified by:: preRegister in interface MBeanRegistration

Returns:: the actual ObjectName to register this MBean with.
Throws:: Exception - for any error, the MBean is not registered.

postRegister

public void postRegister(Boolean registrationDone)

Description copied from interface: MBeanRegistration

This method is called by the MBeanServer after registration takes place or when registration fails.

Specified by:: postRegister in interface MBeanRegistration

Parameters:: registrationDone - the MBeanServer passes true when the MBean was registered, false otherwise.

preDeregister

public void preDeregister()
                   throws Exception

Description copied from interface: MBeanRegistration

This method is called by the MBeanServer before deregistration takes place.

The MBean can throw an exception, this will stop the deregistration. The exception is forwarded to the invoker wrapped in an MBeanRegistrationException.

Specified by:: preDeregister in interface MBeanRegistration

Throws:: Exception

postDeregister

public void postDeregister()

Description copied from interface: MBeanRegistration

This method is called by the MBeanServer after deregistration takes place.

Specified by:: postDeregister in interface MBeanRegistration

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Method Summary
`void`	`addClassLoader(ClassLoader loader)` Add a class loader to the repository.
`boolean`	`addClassLoaderURL(ClassLoader cl, URL url)` Update the set of URLs known to be associated with a previously added class loader.
`void`	`addNotificationListener(NotificationListener listener, NotificationFilter filter, Object handback)` addNotificationListener delegates to the broadcaster object we hold.
`void`	`cacheLoadedClass(String name, Class cls, ClassLoader cl)` Add a Class to the repository cache.
`String`	`displayClassInfo(String className)` A utility method that iterates over all repository class loaders and display the class information for every UCL that contains the given className
`void`	`flush()` Flush the ULR classes cache
`Class`	`getCachedClass(String classname)`
`int`	`getCacheSize()` Get the number of classes loaded into the ULR cache.
`int`	`getClassLoadersSize()` Get the number of UnifiedClassLoader3s (UCLs) in the ULR
`LoaderRepository`	`getInstance()`
`MBeanNotificationInfo[]`	`getNotificationInfo()` Returns the notification metadata associated with the MBean.
`Set`	`getPackageClassLoaders(String className)` Called by LoadMgr to obtain all class loaders for the given className
`URL`	`getResource(String name, ClassLoader cl)` Loads a resource following the Unified ClassLoader architecture
`protected URL`	`getResourceFromGlobalCache(String name)` Check for a resource in the global cache Synchronizes access to globalResources using the loaderToResourcesMap monitor
`protected URL`	`getResourceFromRepository(String name, ClassLoader cl)`
`void`	`getResources(String name, ClassLoader cl, List urls)` Find all resource URLs for the given name.
`URL[]`	`getURLs()` This is a utility method a listing of the URL for all UnifiedClassLoaders associated with the repository.
`RepositoryClassLoader`	`getWrappingClassLoader(ClassLoader cl)` Get any wrapping classloader for the passed classloader
`Class`	`loadClass(String className)` First tries to load from any UCL in the ULR, and if the class is not found, next tries the current thread context class loader.
`Class`	`loadClass(String name, boolean resolve, ClassLoader cl)` Unlike other implementations of LoaderRepository, this method does nothing but ask the UnifiedClassLoader3 to load the class as UCL3s do not use this method.
`Class`	`loadClassBefore(ClassLoader stop, String className)` Loads a class from the repository, using the classloaders that were registered before the given classloader.
`Class`	`loadClassFromCache(String name)` Lookup a Class from the repository cache.
`Class`	`loadClassWithout(ClassLoader loader, String className)` Loads a class from the repository, excluding the given classloader.
`RepositoryClassLoader`	`newClassLoader(URL url, boolean addToRepository)` Create RepositoryClassLoader and optionally add it to the repository
`RepositoryClassLoader`	`newClassLoader(URL url, URL origURL, boolean addToRepository)` Create RepositoryClassLoader and optionally add it to the repository
`void`	`postDeregister()` This method is called by the MBeanServer after deregistration takes place.
`void`	`postRegister(Boolean registrationDone)` This method is called by the MBeanServer after registration takes place or when registration fails.
`void`	`preDeregister()` This method is called by the MBeanServer before deregistration takes place.
`ObjectName`	`preRegister(MBeanServer server, ObjectName name)` This method is called by the MBeanServer before registration takes place.
`LoaderRepository`	`registerClassLoader(RepositoryClassLoader ucl)` This method provides an mbean-accessible way to add a UnifiedClassloader, and sends a notification when it is added.
`void`	`removeClassLoader(ClassLoader loader)` Remove the class loader from the repository.
`void`	`removeNotificationListener(NotificationListener listener)` removeNotificationListener delegates to our broadcaster object
`void`	`removeNotificationListener(NotificationListener listener, NotificationFilter filter, Object handback)` Removes a listener from the Emitter.

UnifiedLoaderRepository3 (JBoss/JMX API) - JBoss 4.0.1 sp1 jmx API Documentation 英文版文档

org.jboss.mx.loading Class UnifiedLoaderRepository3

UnifiedLoaderRepository3

newClassLoader

newClassLoader

getCacheSize

getClassLoadersSize

flush

getCachedClass

loadClass

getPackageClassLoaders

loadClassFromCache

cacheLoadedClass

getResource

getResources

getResourceFromGlobalCache

getResourceFromRepository

getURLs

displayClassInfo

loadClass

loadClassWithout

loadClassBefore

getWrappingClassLoader

addClassLoader

addClassLoaderURL

removeClassLoader

registerClassLoader

getInstance

addNotificationListener

getNotificationInfo

removeNotificationListener

removeNotificationListener

preRegister

postRegister

preDeregister

postDeregister

org.jboss.mx.loading
Class UnifiedLoaderRepository3