/*
* 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.services.bootstrap;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
import java.util.Arrays;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import org.jboss.as.server.moduleservice.ServiceModuleLoader;
import org.jboss.as.weld.logging.WeldLogger;
import org.jboss.as.weld.util.Reflections;
import org.jboss.modules.Module;
import org.jboss.modules.ModuleClassLoader;
import org.jboss.modules.ModuleIdentifier;
import org.jboss.weld.interceptor.proxy.LifecycleMixin;
import org.jboss.weld.logging.BeanLogger;
import org.jboss.weld.serialization.spi.BeanIdentifier;
import org.jboss.weld.serialization.spi.ProxyServices;
import org.wildfly.security.manager.WildFlySecurityManager;
/**
* {@link ProxyServices} implementation that delegates to the module class loader if the bean class loader cannot be determined
*
* @author Stuart Douglas
* @author Jozef Hartinger
*
*/
public class ProxyServicesImpl implements ProxyServices {
private static String[] REQUIRED_WELD_DEPENDENCIES = new String[] {
"org.jboss.weld.core",
"org.jboss.weld.spi"
};
// these are used to check whether a classloader is capable of loading Weld proxies
private static String[] WELD_CLASSES = new String[] {
BeanIdentifier.class.getName(),
LifecycleMixin.class.getName()
};
private final Module module;
private final ConcurrentMap<ModuleIdentifier, Boolean> processedStaticModules = new ConcurrentHashMap<>();
public ProxyServicesImpl(Module module) {
this.module = module;
}
public ClassLoader getClassLoader(final Class<?> proxiedBeanType) {
if (! WildFlySecurityManager.isChecking()) {
return AccessController.doPrivileged(new PrivilegedAction<ClassLoader>() {
public ClassLoader run() {
return _getClassLoader(proxiedBeanType);
}
});
} else {
return _getClassLoader(proxiedBeanType);
}
}
private ClassLoader _getClassLoader(Class<?> proxiedBeanType) {
if (proxiedBeanType.getName().startsWith("java")) {
return module.getClassLoader();
} else if(proxiedBeanType.getClassLoader() instanceof ModuleClassLoader) {
final ModuleClassLoader loader = (ModuleClassLoader)proxiedBeanType.getClassLoader();
//even though this is not strictly spec compliant if a class from the app server is
//being proxied we use the deployment CL to prevent a memory leak
//in theory this means that package private methods will not work correctly
//however the application does not have access to package private methods anyway
//as it is in a different class loader
if(loader.getModule().getModuleLoader() instanceof ServiceModuleLoader) {
//this is a dynamic module
//we can use it to load the proxy
return proxiedBeanType.getClassLoader();
} else {
// this class comes from a static module
// first, check if we can use its classloader to load proxy classes
final Module definingModule = loader.getModule();
Boolean hasWeldDependencies = processedStaticModules.get(definingModule.getIdentifier());
boolean logWarning = false; // only log for the first class in the module
if (hasWeldDependencies == null) {
hasWeldDependencies = canLoadWeldProxies(definingModule); // may be run multiple times but that does not matter
logWarning = processedStaticModules.putIfAbsent(definingModule.getIdentifier(), hasWeldDependencies) == null;
}
if (hasWeldDependencies) {
// this module declares weld dependencies - we can use module's classloader to load the proxy class
// pros: package-private members will work fine
// cons: proxy classes will remain loaded by the module's classloader after undeployment (nothing else leaks)
return proxiedBeanType.getClassLoader();
} else {
// no weld dependencies - we use deployment's classloader to load the proxy class
// pros: proxy classes unloaded with undeployment
// cons: package-private methods and constructors will yield IllegalAccessException
if (logWarning) {
WeldLogger.ROOT_LOGGER.loadingProxiesUsingDeploymentClassLoader(definingModule.getIdentifier(), Arrays.toString(REQUIRED_WELD_DEPENDENCIES));
}
return this.module.getClassLoader();
}
}
} else {
return proxiedBeanType.getClassLoader();
}
}
private static boolean canLoadWeldProxies(Module module) {
for (String weldClass : WELD_CLASSES) {
if (!Reflections.isAccessible(weldClass, module.getClassLoader())) {
return false;
}
}
return true;
}
public void cleanup() {
processedStaticModules.clear();
}
public Class<?> loadBeanClass(final String className) {
try {
return (Class<?>) AccessController.doPrivileged(new PrivilegedExceptionAction<Object>() {
public Object run() throws Exception {
return Class.forName(className, true, getClassLoader(this.getClass()));
}
});
} catch (PrivilegedActionException pae) {
throw BeanLogger.LOG.cannotLoadClass(className, pae.getException());
}
}
}