org.mule.runtime.module.artifact.classloader

Class CompositeClassLoader

java.lang.Object

java.lang.ClassLoader

org.mule.runtime.module.artifact.classloader.CompositeClassLoader

All Implemented Interfaces:

ClassLoaderLookupPolicyProvider

public class CompositeClassLoader
extends ClassLoader
implements ClassLoaderLookupPolicyProvider

Defines a classloader that delegates classes and resources resolution to a list of classloaders.

By using a ClassLoaderLookupPolicy this classLoader can use parent-first, parent-only or child-first classloading lookup mode per package.

Field Summary

Fields

Modifier and Type	Field and Description
protected List<ClassLoader>	classLoaders
protected static org.slf4j.Logger	logger

Constructor Summary

Constructors

Constructor and Description
CompositeClassLoader(ClassLoader parent, List<ClassLoader> classLoaders, ClassLoaderLookupPolicy lookupPolicy) Creates a new instance

Method Summary

Modifier and Type	Method and Description
protected Method	findDeclaredMethod(ClassLoader classLoader, String methodName, Class<?>... params)
protected String	findLibrary(String libname)
protected String	findLibrary(String libname, ClassLoader classLoader)
ClassLoaderLookupPolicy	getClassLoaderLookupPolicy()
URL	getResource(String name)
InputStream	getResourceAsStream(String name)
Enumeration<URL>	getResources(String name)
Class<?>	loadClass(String name)
protected Class<?>	loadClass(String name, boolean resolve)
protected void	logReflectionLoadingError(String name, ClassLoader classLoader, Exception e, String type)

Methods inherited from class java.lang.ClassLoader

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

Methods inherited from class java.lang.Object

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

Field Detail

logger

protected static final org.slf4j.Logger logger

classLoaders

protected final List<ClassLoader> classLoaders

Constructor Detail

CompositeClassLoader

public CompositeClassLoader(ClassLoader parent,
                            List<ClassLoader> classLoaders,
                            ClassLoaderLookupPolicy lookupPolicy)

Creates a new instance

Parameters:

parent - parent class loader used to delegate the lookup process. Can be null.

classLoaders - class loaders to compose. Non empty.

lookupPolicy - policy used to guide the lookup process. Non null

Method Detail

getClassLoaderLookupPolicy

public ClassLoaderLookupPolicy getClassLoaderLookupPolicy()

Specified by:

getClassLoaderLookupPolicy in interface ClassLoaderLookupPolicyProvider

Returns:

lookup policy used on the classLoader. Non null.

loadClass

public Class<?> loadClass(String name)
                   throws ClassNotFoundException

Overrides:

loadClass in class ClassLoader

Throws:

ClassNotFoundException

loadClass

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

Overrides:

loadClass in class ClassLoader

Throws:

ClassNotFoundException

getResource

public URL getResource(String name)

Overrides:

getResource in class ClassLoader

getResourceAsStream

public InputStream getResourceAsStream(String name)

Overrides:

getResourceAsStream in class ClassLoader

findLibrary

protected String findLibrary(String libname)

Overrides:

findLibrary in class ClassLoader

findLibrary

protected String findLibrary(String libname,
                             ClassLoader classLoader)

getResources

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

Overrides:

getResources in class ClassLoader

Throws:

IOException

findDeclaredMethod

protected Method findDeclaredMethod(ClassLoader classLoader,
                                    String methodName,
                                    Class<?>... params)
                             throws NoSuchMethodException

Throws:

NoSuchMethodException

logReflectionLoadingError

protected void logReflectionLoadingError(String name,
                                         ClassLoader classLoader,
                                         Exception e,
                                         String type)