/* * JBoss, Home of Professional Open Source * Copyright 2008, 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.plugins.classloading; import java.util.Set; import org.jboss.classloading.spi.dependency.policy.ClassLoaderPolicyModule; import org.jboss.classloading.spi.metadata.ClassLoadingMetaData; import org.jboss.dependency.spi.ControllerContext; import org.jboss.dependency.spi.ControllerState; import org.jboss.deployers.spi.deployer.DeploymentStages; import org.jboss.deployers.structure.spi.DeploymentUnit; /** * AbstractDeploymentClassLoaderPolicyModule. * * @author <a href="adrian@jboss.com">Adrian Brock</a> * @version $Revision: 1.1 $ */ public abstract class AbstractDeploymentClassLoaderPolicyModule extends ClassLoaderPolicyModule { /** The serialVersionUID */ private static final long serialVersionUID = 1L; /** The classloader state for deployments */ private static ControllerState CLASSLOADER_STATE = new ControllerState(DeploymentStages.CLASSLOADER.getName()); /** The deployment unit */ private DeploymentUnit unit; /** * Determine the classloading metadata for the deployment unit * * @param unit the deployment unit * @return the classloading metadata */ private static ClassLoadingMetaData determineClassLoadingMetaData(DeploymentUnit unit) { if (unit == null) throw new IllegalArgumentException("Null unit"); return unit.getAttachment(ClassLoadingMetaData.class); } /** * Determine the classloading metadata for the deployment unit * * @param unit the deployment unit * @return the classloading metadata */ private static String determineContextName(DeploymentUnit unit) { if (unit == null) throw new IllegalArgumentException("Null unit"); ControllerContext context = unit.getTopLevel().getAttachment(ControllerContext.class); if (context == null) throw new IllegalStateException("Deployment has no controller context"); // We use the deployment name String contextName = unit.getName(); // Check to see whether we need to add our name as an alias if (contextName.equals(context.getName()) == false) { Set<Object> aliases = context.getAliases(); if (aliases != null && aliases.contains(contextName) == false) { try { context.getController().addAlias(contextName, context.getName()); } catch (Throwable t) { throw new RuntimeException("Error adding deployment alias " + contextName + " to " + context, t); } } } return contextName; } /** * Create a new AbstractDeploymentClassLoaderPolicyModule. * * @param unit the deployment unit * @throws IllegalArgumentException for a null unit */ public AbstractDeploymentClassLoaderPolicyModule(DeploymentUnit unit) { super(determineClassLoadingMetaData(unit), determineContextName(unit)); this.unit = unit; ControllerContext context = unit.getTopLevel().getAttachment(ControllerContext.class); setControllerContext(context); } /** * Get the unit. * * @return the unit. */ public DeploymentUnit getDeploymentUnit() { return unit; } @Override public ControllerState getClassLoaderState() { return CLASSLOADER_STATE; } }