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package org.glassfish.javaee.full.deployment;
import java.util.*;
import com.sun.enterprise.loader.ASURLClassLoader;
import org.glassfish.internal.api.DelegatingClassLoader;
import org.glassfish.hk2.api.PreDestroy;
/**
* Simplistic class loader which will delegate to each module class loader in the order
* they were added to the instance
*
* @author Jerome Dochez
*/
public class EarClassLoader extends ASURLClassLoader
{
private List<ClassLoaderHolder> moduleClassLoaders = new LinkedList<ClassLoaderHolder>();
boolean isPreDestroyCalled = false;
public EarClassLoader(ClassLoader classLoader) {
super(classLoader);
}
public void addModuleClassLoader(String moduleName, ClassLoader cl) {
moduleClassLoaders.add(new ClassLoaderHolder(moduleName, cl));
}
public ClassLoader getModuleClassLoader(String moduleName) {
for (ClassLoaderHolder clh : moduleClassLoaders) {
if (moduleName.equals(clh.moduleName)) {
return clh.loader;
}
}
return null;
}
@Override
public void preDestroy() {
if (isPreDestroyCalled) {
return;
}
try {
for (ClassLoaderHolder clh : moduleClassLoaders) {
// destroy all the module classloaders
if ( !(clh.loader instanceof EarLibClassLoader) &&
!(clh.loader instanceof EarClassLoader) &&
!isRARCL(clh.loader)) {
try {
PreDestroy.class.cast(clh.loader).preDestroy();
} catch (Exception e) {
// ignore, the class loader does not need to be
// explicitly stopped.
}
}
}
// destroy itself
super.preDestroy();
//now destroy embedded Connector CLs
DelegatingClassLoader dcl = (DelegatingClassLoader)this.getParent();
for(DelegatingClassLoader.ClassFinder cf : dcl.getDelegates()){
try {
PreDestroy.class.cast(cf).preDestroy();
} catch (Exception e) {
// ignore, the class loader does not need to be
// explicitly stopped.
}
}
// now destroy the EarLibClassLoader
PreDestroy.class.cast(this.getParent().getParent()).preDestroy();
moduleClassLoaders = null;
} catch (Exception e) {
// ignore, the class loader does not need to be explicitely stopped.
}
isPreDestroyCalled = true;
}
private boolean isRARCL(ClassLoader loader) {
DelegatingClassLoader connectorCL = (DelegatingClassLoader) this.getParent();
if (!(loader instanceof DelegatingClassLoader.ClassFinder)) {
return false;
}
return connectorCL.getDelegates().contains((DelegatingClassLoader.ClassFinder)loader);
}
private static class ClassLoaderHolder {
final ClassLoader loader;
final String moduleName;
private ClassLoaderHolder(String moduleName, ClassLoader loader) {
this.loader = loader;
this.moduleName = moduleName;
}
}
@Override
protected String getClassLoaderName() {
return "EarClassLoader";
}
}