/*
* JBoss, Home of Professional Open Source
* Copyright 2010, Red Hat Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.as.weld.deployment.processors;
import java.lang.reflect.Constructor;
import java.util.List;
import javax.enterprise.inject.spi.Extension;
import org.jboss.as.server.deployment.Attachments;
import org.jboss.as.server.deployment.DeploymentPhaseContext;
import org.jboss.as.server.deployment.DeploymentUnit;
import org.jboss.as.server.deployment.DeploymentUnitProcessingException;
import org.jboss.as.server.deployment.DeploymentUnitProcessor;
import org.jboss.as.server.deployment.PrivateSubDeploymentMarker;
import org.jboss.as.server.deployment.ServicesAttachment;
import org.jboss.as.server.deployment.reflect.DeploymentReflectionIndex;
import org.jboss.as.weld.WeldDeploymentMarker;
import org.jboss.as.weld.WeldLogger;
import org.jboss.as.weld.WeldMessages;
import org.jboss.as.weld.deployment.WeldAttachments;
import org.jboss.modules.Module;
import org.jboss.weld.bootstrap.spi.Metadata;
import org.jboss.weld.metadata.MetadataImpl;
/**
* Deployment processor that loads CDI portable extensions.
*
* @author Stuart Douglas
*/
public class WeldPortableExtensionProcessor implements DeploymentUnitProcessor {
private static final String[] EMPTY_STRING_ARRAY = {};
@Override
public void deploy(DeploymentPhaseContext phaseContext) throws DeploymentUnitProcessingException {
final DeploymentUnit deploymentUnit = phaseContext.getDeploymentUnit();
// for war modules we require a beans.xml to load portable extensions
if (PrivateSubDeploymentMarker.isPrivate(deploymentUnit)) {
if (!WeldDeploymentMarker.isPartOfWeldDeployment(deploymentUnit)) {
return;
}
} else if (deploymentUnit.getParent() == null) {
// if any sub deployments have beans.xml then the top level deployment is
// marked as a weld deplyment
if (!WeldDeploymentMarker.isPartOfWeldDeployment(deploymentUnit)) {
return;
}
} else {
// if any deployments have a beans.xml we need to load portable extensions
// even if this one does not.
if (!WeldDeploymentMarker.isPartOfWeldDeployment(deploymentUnit.getParent())) {
return;
}
}
// we attach extensions directly to the top level deployment
final DeploymentUnit topLevelDeployment = deploymentUnit.getParent() == null ? deploymentUnit : deploymentUnit
.getParent();
final ServicesAttachment services = deploymentUnit.getAttachment(Attachments.SERVICES);
final Module module = deploymentUnit.getAttachment(Attachments.MODULE);
ClassLoader oldCl = SecurityActions.getContextClassLoader();
try {
SecurityActions.setContextClassLoader(module.getClassLoader());
loadAttachments(services, module, topLevelDeployment);
} finally {
SecurityActions.setContextClassLoader(oldCl);
}
}
private void loadAttachments(final ServicesAttachment servicesAttachment, Module module, DeploymentUnit deploymentUnit) throws DeploymentUnitProcessingException {
// now load extensions
final DeploymentReflectionIndex index = deploymentUnit.getAttachment(Attachments.REFLECTION_INDEX);
final List<String> services = servicesAttachment.getServiceImplementations(Extension.class.getName());
if (services == null) {
return;
}
for (String service : services) {
final Extension extension = loadExtension(service, index, module.getClassLoader());
if(extension == null) {
continue;
}
Metadata<Extension> metadata = new MetadataImpl<Extension>(extension, deploymentUnit.getName());
WeldLogger.DEPLOYMENT_LOGGER.debug("Loaded portable extension " + extension);
deploymentUnit.addToAttachmentList(WeldAttachments.PORTABLE_EXTENSIONS, metadata);
}
}
private Extension loadExtension(String serviceClassName, final DeploymentReflectionIndex index, final ClassLoader loader) throws DeploymentUnitProcessingException {
Class<?> clazz = null;
Class<Extension> serviceClass = null;
try {
clazz = loader.loadClass(serviceClassName);
serviceClass = (Class<Extension>) clazz;
final Constructor<Extension> ctor = index.getClassIndex(serviceClass).getConstructor(EMPTY_STRING_ARRAY);
return ctor.newInstance();
} catch (ClassCastException e) {
throw WeldMessages.MESSAGES.extensionDoesNotImplementExtension(serviceClassName, e);
} catch (Exception e) {
WeldLogger.DEPLOYMENT_LOGGER.couldNotLoadPortableExceptionClass(serviceClassName, e);
}
return null;
}
@Override
public void undeploy(DeploymentUnit context) {
}
}