org.mule.module.launcher.artifact

Interface ArtifactClassLoader

All Superinterfaces:

DisposableClassLoader, LocalResourceLocator

All Known Subinterfaces:

ApplicationClassLoader

All Known Implementing Classes:

AbstractArtifactClassLoader, CompositeApplicationClassLoader, MuleApplicationClassLoader, MuleSharedDomainClassLoader

public interface ArtifactClassLoader
extends DisposableClassLoader, LocalResourceLocator

Method Summary

Methods

Modifier and Type	Method and Description
void	addShutdownListener(ShutdownListener listener) Adds a shutdown listener to the class loader.
URL	findResource(String resource)
String	getArtifactName()
ClassLoader	getClassLoader() ClassLoader is an abstract class.

Methods inherited from interface org.mule.module.launcher.DisposableClassLoader

dispose

Methods inherited from interface org.mule.module.launcher.LocalResourceLocator

findLocalResource

Method Detail

getArtifactName

String getArtifactName()

Returns:

the artifact unique identifier

findResource

URL findResource(String resource)

Parameters:

resource - name of the resource to find.

Returns:

the resource URL, null if it doesn't exists.

getClassLoader

ClassLoader getClassLoader()

ClassLoader is an abstract class. Not an interface. There are parts of the code that requires a ClassLoader and others that requires an ArtifactClassLoader. Ideally I would make ArtifactClassLoader implement ClassLoader interface but there's no such interface. So if I have a method that requires a ClassLoader instance and an ArtifactClassLoader I would have to down cast and assume that it can be down casted or send two parameters, one for the ClassLoader and one for the ArtifactClassLoader: public void doSomething(ArtifactClassLoader acl) { doSomething2(acl); //this requires an ArtifactClassLoader doSomething3((ClassLoader)acl); //this requires a ClassLoader } public void doSomething(ArtifactClassLoader acl, ClassLoader cl) { doSomething2(acl); //this requires an ArtifactClassLoader doSomething3(cl); //this requires a ClassLoader } To overcome that problem seems much better to have a method in ArtifactClassLoader that can actually return a ClassLoader instance: public void doSomething(ArtifactClassLoader acl) { doSomething2(acl); //this requires an ArtifactClassLoader doSomething3(acl.getDomainClassLoader()); //this requires a ClassLoader }

Returns:

class loader to use for this artifact.

addShutdownListener

void addShutdownListener(ShutdownListener listener)

Adds a shutdown listener to the class loader. This listener will be invoked synchronously right before the class loader is disposed and closed.