/*
* JBoss, Home of Professional Open Source
* Copyright 2006, JBoss 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.deployers.vfs.deployer.kernel;
import java.util.ArrayList;
import java.util.List;
import org.jboss.beans.metadata.spi.BeanMetaData;
import org.jboss.deployers.spi.DeploymentException;
import org.jboss.deployers.spi.deployer.helpers.DeploymentVisitor;
import org.jboss.deployers.structure.spi.DeploymentUnit;
import org.jboss.logging.Logger;
/**
* BeanMetaDataVisitor.<p>
*
* @param <T> exact attachment type
* @author <a href="ales.justin@jboss.com">Ales Justin</a>
*/
public abstract class BeanMetaDataFactoryVisitor<T> implements DeploymentVisitor<T>
{
private Logger log = Logger.getLogger(getClass());
/**
* Add bean component.
*
* @param unit the deployment unit
* @param bean the bean metadata
*/
protected static void addBeanComponent(DeploymentUnit unit, BeanMetaData bean)
{
DeploymentUnit component = unit.addComponent(bean.getName());
component.addAttachment(BeanMetaData.class.getName(), bean);
}
/**
* Remove bean component.
*
* @param unit the deployment unit
* @param bean the bean metadata
*/
protected static void removeBeanComponent(DeploymentUnit unit, BeanMetaData bean)
{
unit.removeComponent(bean.getName());
}
/**
* Ignore all error during component removal.
*
* @param unit the deployment unit
* @param bean the bean metadata
*/
protected void safeRemoveBeanComponent(DeploymentUnit unit, BeanMetaData bean)
{
try
{
removeBeanComponent(unit, bean);
}
catch (Throwable ignored)
{
log.warn("Error during component removal: " + unit.getName(), ignored);
}
}
/**
* Get beans from deployment.
*
* @param deployment the deployment
* @return list of beans
*/
protected abstract List<BeanMetaData> getBeans(T deployment);
public void deploy(DeploymentUnit unit, T deployment) throws DeploymentException
{
List<BeanMetaData> beans = getBeans(deployment);
if (beans != null && beans.isEmpty() == false)
{
List<BeanMetaData> visited = new ArrayList<BeanMetaData>();
try
{
for (BeanMetaData bean : beans)
{
addBeanComponent(unit, bean);
visited.add(bean);
}
}
catch (Throwable t)
{
for (int i = visited.size()-1; i >= 0; --i)
{
safeRemoveBeanComponent(unit, visited.get(i));
}
throw DeploymentException.rethrowAsDeploymentException("Error deploying: " + unit.getName(), t);
}
}
}
public void undeploy(DeploymentUnit unit, T deployment)
{
List<BeanMetaData> beans = getBeans(deployment);
if (beans != null && beans.isEmpty() == false)
{
for (BeanMetaData bean : beans)
{
safeRemoveBeanComponent(unit, bean);
}
}
}
}