org.mule.runtime.deployment.model.internal

Class AbstractArtifactClassLoaderBuilder<T extends AbstractArtifactClassLoaderBuilder>

java.lang.Object

org.mule.runtime.deployment.model.internal.AbstractArtifactClassLoaderBuilder<T>

Type Parameters:

T - the type of the filer.

Direct Known Subclasses:

PolicyTemplateClassLoaderBuilder, ToolingApplicationClassLoaderBuilder, ToolingDomainClassLoaderBuilder, ToolingPluginClassLoaderBuilder

public abstract class AbstractArtifactClassLoaderBuilder<T extends AbstractArtifactClassLoaderBuilder>
extends Object

Base class for all artifacts class loader filters.

Since:

4.0

Field Summary

Fields

Modifier and Type	Field and Description
protected ArtifactDescriptor	artifactDescriptor
protected org.slf4j.Logger	logger

Constructor Summary

Constructors

Constructor and Description
AbstractArtifactClassLoaderBuilder(RegionPluginClassLoadersFactory pluginClassLoadersFactory) Creates an AbstractArtifactClassLoaderBuilder.

Method Summary

Modifier and Type	Method and Description
T	addArtifactPluginDescriptors(ArtifactPluginDescriptor... artifactPluginDescriptors)
ArtifactClassLoader	build() Creates a new ArtifactClassLoader using the provided configuration.
protected abstract ArtifactClassLoader	createArtifactClassLoader(String artifactId, RegionClassLoader regionClassLoader) Creates the class loader for the artifact being built.
protected RegionClassLoader	createRegionClassLoader(String artifactId, ArtifactDescriptor artifactDescriptor, ClassLoader parentClassLoader, ClassLoaderLookupPolicy parentLookupPolicy) Template method to build different implementations of a RegionClassLoader
protected abstract String	getArtifactId(ArtifactDescriptor artifactDescriptor)
protected abstract ArtifactClassLoader	getParentClassLoader() Implementation must redefine this method and it should provide the root class loader which is going to be used as parent class loader for every other class loader created by this builder.
protected ClassLoaderLookupPolicy	getParentLookupPolicy(ArtifactClassLoader parentClassLoader)
T	setArtifactDescriptor(ArtifactDescriptor artifactDescriptor)

Methods inherited from class java.lang.Object

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

Field Detail

logger

protected final org.slf4j.Logger logger

artifactDescriptor

protected ArtifactDescriptor artifactDescriptor

Constructor Detail

AbstractArtifactClassLoaderBuilder

public AbstractArtifactClassLoaderBuilder(RegionPluginClassLoadersFactory pluginClassLoadersFactory)

Creates an AbstractArtifactClassLoaderBuilder.

Parameters:

pluginClassLoadersFactory - creates the class loaders for the plugins included in the artifact's region. Non null

Method Detail

getParentClassLoader

protected abstract ArtifactClassLoader getParentClassLoader()

Implementation must redefine this method and it should provide the root class loader which is going to be used as parent class loader for every other class loader created by this builder.

Returns:

the root class loader for all other class loaders

addArtifactPluginDescriptors

public T addArtifactPluginDescriptors(ArtifactPluginDescriptor... artifactPluginDescriptors)

Parameters:

artifactPluginDescriptors - set of plugins descriptors that will be used by the application.

Returns:

the builder

setArtifactDescriptor

public T setArtifactDescriptor(ArtifactDescriptor artifactDescriptor)

Parameters:

artifactDescriptor - the descriptor of the artifact for which the class loader is going to be created.

Returns:

the builder

build

public ArtifactClassLoader build()

Creates a new ArtifactClassLoader using the provided configuration. It will create the proper class loader hierarchy and filters the artifact resources and plugins classes and resources are resolve correctly.

Returns:

a ArtifactClassLoader created from the provided configuration.

Throws:

RuntimeException - exception cause when it was not possible to access the file provided as dependencies

createRegionClassLoader

protected RegionClassLoader createRegionClassLoader(String artifactId,
                                                    ArtifactDescriptor artifactDescriptor,
                                                    ClassLoader parentClassLoader,
                                                    ClassLoaderLookupPolicy parentLookupPolicy)

Template method to build different implementations of a RegionClassLoader

Returns:

a new RegionClassLoader

getParentLookupPolicy

protected ClassLoaderLookupPolicy getParentLookupPolicy(ArtifactClassLoader parentClassLoader)

Parameters:

parentClassLoader - parent class loader for the creates artifact class loader

Returns:

the lookup policy to use on the created artifact class loader

createArtifactClassLoader

protected abstract ArtifactClassLoader createArtifactClassLoader(String artifactId,
                                                                 RegionClassLoader regionClassLoader)

Creates the class loader for the artifact being built.

Parameters:

artifactId - identifies the artifact being created. Non empty.

regionClassLoader - class loader containing the artifact and dependant class loaders. Non null.

Returns:

getArtifactId

protected abstract String getArtifactId(ArtifactDescriptor artifactDescriptor)