microsofia.boot.loader

Class NodeClassLoader

java.lang.Object

java.lang.ClassLoader

microsofia.boot.loader.NodeClassLoader

All Implemented Interfaces:

INode

public class NodeClassLoader
extends ClassLoader
implements INode

Represents a node classloader. All the nodes have the BootClassLoader as parent.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	NodeClassLoader(BootClassLoader bootClassLoader, org.eclipse.aether.graph.DependencyNode node)

Method Summary

Modifier and Type	Method and Description
void	cacheResourcesHashCode() In order to have a fast lookup after startup, the node caches the hashcode path of all its resources.
protected Class<?>	findClass(String name) findClass delegates to a ClassVisitor instance
Class<?>	findClassInNode(String name, String classFilePath) Try to load locally the class without any traversing of the graph.
protected String	findLibrary(String libname) Delegates to a LibraryVisitor
String	findLibraryInNode(String libname) Try to load locally the library path without any traversing of the graph.
protected URL	findResource(String name) Delegates to a ResourceVisitor
URL	findResourceInNode(String name) Try to load locally the resource without any traversing of the graph.
protected Enumeration<URL>	findResources(String name) Delegates to a BootClassLoader (is it needed?)
List<URL>	findResourcesInNode(String name) Try to load locally the resource without any traversing of the graph.
String	getArtifactId() Returns the id of the artifact
ClassLoader	getClassLoader() Returns classloader of the node, itself
NodeClassLoader[]	getDependencies() Dependencies of the node
Long	getId() Returns the unique id of the node
URL	getResource(String name)
Enumeration<URL>	getResources(String name) Delegates to a ResourcesVisitor
protected Class<?>	loadClass(String name, boolean resolve) Loading the class consists of first checking in the parent, and if not found traversing the graph starting by the current node and following its dependencies.
String	toString()
protected <T> T	traverse(AbstractVisitor<T> visitor)

Methods inherited from class java.lang.ClassLoader

clearAssertionStatus, defineClass, defineClass, defineClass, defineClass, definePackage, findLoadedClass, findSystemClass, getClassLoadingLock, getPackage, getPackages, getParent, getResourceAsStream, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, loadClass, registerAsParallelCapable, resolveClass, setClassAssertionStatus, setDefaultAssertionStatus, setPackageAssertionStatus, setSigners

Methods inherited from class java.lang.Object

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

Constructor Detail

NodeClassLoader

protected NodeClassLoader(BootClassLoader bootClassLoader,
                          org.eclipse.aether.graph.DependencyNode node)
                   throws Exception

Throws:

Exception

Method Detail

getId

public Long getId()

Returns the unique id of the node

Specified by:

getId in interface INode

Returns:

the id of the node

getClassLoader

public ClassLoader getClassLoader()

Returns classloader of the node, itself

Specified by:

getClassLoader in interface INode

Returns:

the classloader of the node

getArtifactId

public String getArtifactId()

Returns the id of the artifact

getDependencies

public NodeClassLoader[] getDependencies()

Description copied from interface: INode

Dependencies of the node

Specified by:

getDependencies in interface INode

Returns:

the dependencies of the node

cacheResourcesHashCode

public void cacheResourcesHashCode()

In order to have a fast lookup after startup, the node caches the hashcode path of all its resources.

Specified by:

cacheResourcesHashCode in interface INode

traverse

protected <T> T traverse(AbstractVisitor<T> visitor)

loadClass

protected Class<?> loadClass(String name,
                             boolean resolve)
                      throws ClassNotFoundException

Loading the class consists of first checking in the parent, and if not found traversing the graph starting by the current node and following its dependencies.

Overrides:

loadClass in class ClassLoader

Throws:

ClassNotFoundException

findClass

protected Class<?> findClass(String name)
                      throws ClassNotFoundException

findClass delegates to a ClassVisitor instance

Overrides:

findClass in class ClassLoader

Throws:

ClassNotFoundException

findClassInNode

public Class<?> findClassInNode(String name,
                                String classFilePath)
                         throws Exception

Try to load locally the class without any traversing of the graph. The method is called by the ClassVisitor.

Specified by:

findClassInNode in interface INode

Parameters:

name - the class name

classFilePath - the file path of the class

Returns:

the found class

Throws:

Exception

getResource

public URL getResource(String name)

Overrides:

getResource in class ClassLoader

findResource

protected URL findResource(String name)

Delegates to a ResourceVisitor

Overrides:

findResource in class ClassLoader

findResourceInNode

public URL findResourceInNode(String name)
                       throws Exception

Try to load locally the resource without any traversing of the graph. The method is called by the ResourceXXVisitor.

Specified by:

findResourceInNode in interface INode

Returns:

the URL of the resource

Throws:

Exception

getResources

public Enumeration<URL> getResources(String name)
                              throws IOException

Delegates to a ResourcesVisitor

Overrides:

getResources in class ClassLoader

Throws:

IOException

findResources

protected Enumeration<URL> findResources(String name)
                                  throws IOException

Delegates to a BootClassLoader (is it needed?)

Overrides:

findResources in class ClassLoader

Throws:

IOException

findResourcesInNode

public List<URL> findResourcesInNode(String name)
                              throws Exception

Try to load locally the resource without any traversing of the graph. The method is called by the ResourceXXVisitor.

Specified by:

findResourcesInNode in interface INode

Returns:

all the URL with the given resource path

Throws:

Exception

findLibrary

protected String findLibrary(String libname)

Delegates to a LibraryVisitor

Overrides:

findLibrary in class ClassLoader

findLibraryInNode

public String findLibraryInNode(String libname)
                         throws Exception

Try to load locally the library path without any traversing of the graph. The method is called by the LibraryVisitor.

Specified by:

findLibraryInNode in interface INode

Returns:

the path of the library

Throws:

Exception

toString

public String toString()

Overrides:

toString in class Object