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Java Source Code / Java Documentation » EJB Server JBoss 4.2.1 » jmx » org.jboss.mx.loading

Source Cross Reference Class Diagram Java Document (Java Doc)

java.net .URLClassLoader

org.jboss.mx.loading .RepositoryClassLoader

All known Subclasses:   org.jboss.mx.loading .MLetRepositoryClassLoader,  org.jboss.mx.loading .UnifiedClassLoader,
RepositoryClassLoader
abstract public class RepositoryClassLoader extends URLClassLoader (Code)
A RepositoryClassLoader.
author:
   Adrian Brock
version:
   $Revision: 60321 $

Field Summary
protected ReentrantLock loadLock

protected ClassLoader parent

protected LoaderRepository repository
     Reference to the repository.
protected Exception unregisterTrace


Constructor Summary
protected RepositoryClassLoader(URL[] urls, ClassLoader parent)


Method Summary
protected void acquire()
     Acquire the class loading lock.
public void addToClassBlackList(String name)

public void addToResourceBlackList(String name)

public void addURL(URL url)

protected boolean attempt(long waitMS)
     Attempt to acquire the class loading lock.
public void clearBlackLists()

public void clearClassBlackList()
     Clear any class black list.
public void clearResourceBlackList()
     Clear any resource blacklist.
protected void definePackage(String className)

final public boolean equals(Object other)
     This is here to document that this must delegate to the super implementation to perform identity based equality.
protected Class findClass(String name)
     Called by loadClassLocally to find the requested class within this class loaders class path.
protected Class findClassLocally(String name)

public Enumeration findResources(String name)
     Find all resource URLs for the given name.
public Enumeration findResourcesLocally(String name)
     Provides the same functionality as java.net.URLClassLoader.findResources .
public int getAddedOrder()

public URL[] getAllURLs()

public URL[] getClasspath()
     This method simply invokes the super.getURLs() method to access the list of URLs that make up the RepositoryClassLoader classpath.
public LoaderRepository getLoaderRepository()

abstract public ObjectName getObjectName()

public Package getPackage(String name)

public Package[] getPackages()

protected ProtectionDomain getProtectionDomain(URL codesourceUrl)
     Determine the protection domain.
public URL getResource(String name)
     Attempts to load the resource from its URL and if not found forwards to the request to LoaderRepository .
public URL getResourceLocally(String name)
     Provides the same functionality as java.net.URLClassLoader.getResource .
public URL getURL()
     Get the URL associated with the UCL.
public URL[] getURLs()
     Return an empty URL array to force the RMI marshalling subsystem to use the java.server.codebase property as the annotated codebase.
final public int hashCode()
     This is here to document that this must delegate to the super implementation to perform identity based hashing.
public boolean isClassBlackListed(String name)

public boolean isResourceBlackListed(String name)

protected byte[] loadByteCode(String classname)
     Obtain the bytecode for the indicated class from this class loaders classpath.
protected byte[] loadByteCode(URL classURL)
     Obtain the bytecode for the indicated class from this class loaders classpath.
public Class loadClass(String name, boolean resolve)
     The only caller of this method should be the VM initiated loadClassInternal() method.
public Class loadClassBefore(String name)
     The only caller of this method should be the VM initiated loadClassInternal() method.
public synchronized Class loadClassImpl(String name, boolean resolve, int stopAt)

public Class loadClassLocally(String name, boolean resolve)
     Called to attempt to load a class from the set of URLs associated with this classloader.
protected void release()
     Release the class loading lock previous acquired through the acquire method.
public void removeFromClassBlackList(String name)

public void removeFromResourceBlackList(String name)

public void setAddedOrder(int addedOrder)

public void setRepository(LoaderRepository repository)

public String toString()
     Returns a string representation.
public void unregister()


Field Detail
loadLock
protected ReentrantLock loadLock(Code)
Lock

parent
protected ClassLoader parent(Code)
The parent classloader

repository
protected LoaderRepository repository(Code)
Reference to the repository.

unregisterTrace
protected Exception unregisterTrace(Code)
The location where unregister is called from

Constructor Detail
RepositoryClassLoader
protected RepositoryClassLoader(URL[] urls, ClassLoader parent)(Code)
Create a new LoaderRepositoryClassLoader
Parameters:
  urls - the urls
Parameters:
  parent - the parent classloader

Method Detail
acquire
protected void acquire()(Code)
Acquire the class loading lock. This lock must be acquired before a thread enters the class loading task loop in loadClass.
See Also:   RepositoryClassLoader.loadClass(String,boolean)

addToClassBlackList
public void addToClassBlackList(String name)(Code)
Black list a class
Parameters:
  name - the name of the class

addToResourceBlackList
public void addToResourceBlackList(String name)(Code)
Black list a resource
Parameters:
  name - the name of the resource

addURL
public void addURL(URL url)(Code)
Append the given url to the URLs used for class and resource loading
Parameters:
  url - the URL to load from

attempt
protected boolean attempt(long waitMS)(Code)
Attempt to acquire the class loading lock. This lock must be acquired before a thread enters the class loading task loop in loadClass. This method maintains any interrupted state of the calling thread.
See Also:   RepositoryClassLoader.loadClass(String,boolean)

clearBlackLists
public void clearBlackLists()(Code)
Clear all blacklists

clearClassBlackList
public void clearClassBlackList()(Code)
Clear any class black list.

clearResourceBlackList
public void clearResourceBlackList()(Code)
Clear any resource blacklist.

definePackage
protected void definePackage(String className)(Code)
Define the package for the class if not already done
Parameters:
  className - the class name

equals
final public boolean equals(Object other)(Code)
This is here to document that this must delegate to the super implementation to perform identity based equality. Using URL based equality caused conflicts with the Class.forName(String, boolean, ClassLoader).

findClass
protected Class findClass(String name) throws ClassNotFoundException(Code)
Called by loadClassLocally to find the requested class within this class loaders class path.
Parameters:
  name - the name of the class the resulting class
exception:
  ClassNotFoundException - if the class could not be found

findClassLocally
protected Class findClassLocally(String name) throws ClassNotFoundException(Code)
Find the class
Parameters:
  name - the name of the class the class

findResources
public Enumeration findResources(String name) throws IOException(Code)
Find all resource URLs for the given name. This overrides the URLClassLoader version to look for resources in the repository.
Parameters:
  name - the name of the resource Enumeration
throws:
  java.io.IOException -

findResourcesLocally
public Enumeration findResourcesLocally(String name) throws IOException(Code)
Provides the same functionality as java.net.URLClassLoader.findResources .

getAddedOrder
public int getAddedOrder()(Code)
Get the order this classloader was added to the repository the order

getAllURLs
public URL[] getAllURLs()(Code)
Return all library URLs associated with this RepositoryClassLoader
Do not remove this method without running the WebIntegrationTestSuite

getClasspath
public URL[] getClasspath()(Code)
This method simply invokes the super.getURLs() method to access the list of URLs that make up the RepositoryClassLoader classpath. the urls that make up the classpath

getLoaderRepository
public LoaderRepository getLoaderRepository()(Code)
Get the loader repository for this classloader

getObjectName
abstract public ObjectName getObjectName() throws MalformedObjectNameException(Code)
Get the ObjectName the object name

getPackage
public Package getPackage(String name)(Code)

getPackages
public Package[] getPackages()(Code)

getProtectionDomain
protected ProtectionDomain getProtectionDomain(URL codesourceUrl)(Code)
Determine the protection domain. If we are a copy of the original deployment, use the original url as the codebase. the protection domain

getResource
public URL getResource(String name)(Code)
Attempts to load the resource from its URL and if not found forwards to the request to LoaderRepository .

getResourceLocally
public URL getResourceLocally(String name)(Code)
Provides the same functionality as java.net.URLClassLoader.getResource .

getURL
public URL getURL()(Code)
Get the URL associated with the UCL. the url

getURLs
public URL[] getURLs()(Code)
Return an empty URL array to force the RMI marshalling subsystem to use the java.server.codebase property as the annotated codebase.
Do not remove this method without discussing it on the dev list. Empty URL[]

hashCode
final public int hashCode()(Code)
This is here to document that this must delegate to the super implementation to perform identity based hashing. Using URL based hashing caused conflicts with the Class.forName(String, boolean, ClassLoader).

isClassBlackListed
public boolean isClassBlackListed(String name)(Code)
Is the class black listed?
Parameters:
  name - the name of the class true when the class is black listed, false otherwise

isResourceBlackListed
public boolean isResourceBlackListed(String name)(Code)
Is the resource black listed?
Parameters:
  name - the name of the resource true when the resource is black listed, false otherwise

loadByteCode
protected byte[] loadByteCode(String classname) throws ClassNotFoundException, IOException(Code)
Obtain the bytecode for the indicated class from this class loaders classpath.
Parameters:
  classname - the bytecode array if found
exception:
  ClassNotFoundException - - if the class resource could notbe found

loadByteCode
protected byte[] loadByteCode(URL classURL) throws ClassNotFoundException, IOException(Code)
Obtain the bytecode for the indicated class from this class loaders classpath.
Parameters:
  classURL - the bytecode array if found
exception:
  ClassNotFoundException - - if the class resource could notbe found

loadClass
public Class loadClass(String name, boolean resolve) throws ClassNotFoundException(Code)
The only caller of this method should be the VM initiated loadClassInternal() method. This method attempts to acquire the UnifiedLoaderRepository2 lock and then asks the repository to load the class.
Forwards request to LoaderRepository .

loadClassBefore
public Class loadClassBefore(String name) throws ClassNotFoundException(Code)
The only caller of this method should be the VM initiated loadClassInternal() method. This method attempts to acquire the UnifiedLoaderRepository2 lock and then asks the repository to load the class.
Forwards request to LoaderRepository .

loadClassImpl
public synchronized Class loadClassImpl(String name, boolean resolve, int stopAt) throws ClassNotFoundException(Code)

loadClassLocally
public Class loadClassLocally(String name, boolean resolve) throws ClassNotFoundException(Code)
Called to attempt to load a class from the set of URLs associated with this classloader.

release
protected void release()(Code)
Release the class loading lock previous acquired through the acquire method.

removeFromClassBlackList
public void removeFromClassBlackList(String name)(Code)
Remove class from black list
Parameters:
  name - the name of the class

removeFromResourceBlackList
public void removeFromResourceBlackList(String name)(Code)
Remove resource from black list
Parameters:
  name - the name of the resource

setAddedOrder
public void setAddedOrder(int addedOrder)(Code)
Set the order this classloader was added to the repository
Parameters:
  addedOrder - the added order

setRepository
public void setRepository(LoaderRepository repository)(Code)
Set the loader repository
Parameters:
  repository - the repository

toString
public String toString()(Code)
Returns a string representation.

unregister
public void unregister()(Code)

Methods inherited from java.net.URLClassLoader
protected void addURL(URL url)(Code)(Java Doc)
protected Package definePackage(String name, Manifest man, URL url) throws IllegalArgumentException(Code)(Java Doc)
protected Class findClass(String name) throws ClassNotFoundException(Code)(Java Doc)
public URL findResource(String name)(Code)(Java Doc)
public Enumeration<URL> findResources(String name) throws IOException(Code)(Java Doc)
protected PermissionCollection getPermissions(CodeSource codesource)(Code)(Java Doc)
public URL[] getURLs()(Code)(Java Doc)
public static URLClassLoader newInstance(URL[] urls, ClassLoader parent)(Code)(Java Doc)
public static URLClassLoader newInstance(URL[] urls)(Code)(Java Doc)

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