/*
* JBoss, Home of Professional Open Source.
* Copyright 2006, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file 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.ejb3;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Map;
import javax.ejb.EJBObject;
import javax.ejb.Handle;
import javax.ejb.LocalHome;
import javax.ejb.RemoteHome;
import org.jboss.aop.AspectManager;
import org.jboss.aop.Dispatcher;
import org.jboss.aop.MethodInfo;
import org.jboss.aop.advice.Interceptor;
import org.jboss.aop.joinpoint.Invocation;
import org.jboss.aop.joinpoint.InvocationResponse;
import org.jboss.aop.util.MethodHashing;
import org.jboss.aspects.asynch.FutureHolder;
import org.jboss.ejb3.interceptor.InterceptorInfoRepository;
import org.jboss.ejb3.remoting.IsLocalInterceptor;
import org.jboss.ejb3.stateful.StatefulContainerInvocation;
import org.jboss.logging.Logger;
import org.jboss.serial.io.MarshalledObjectForLocalCalls;
/**
* Comment
*
* @author <a href="mailto:bill@jboss.org">Bill Burke</a>
* @version $Revision: 61280 $
*/
public abstract class SessionContainer extends EJBContainer
{
@SuppressWarnings("unused")
private static final Logger log = Logger.getLogger(SessionContainer.class);
protected ProxyDeployer proxyDeployer;
protected Map clusterFamilies = new HashMap();
public class InvokedMethod
{
public InvokedMethod(boolean localInterface, Method method)
{
isLocalInterface = localInterface;
this.method = method;
}
public boolean isLocalInterface;
public Method method;
}
public abstract Object createLocalProxy(Object id) throws Exception;
public abstract Object createRemoteProxy(Object id) throws Exception;
protected ThreadLocalStack<InvokedMethod> invokedMethod = new ThreadLocalStack<InvokedMethod>();
public SessionContainer(ClassLoader cl, String beanClassName, String ejbName, AspectManager manager,
Hashtable ctxProperties, InterceptorInfoRepository interceptorRepository,
Ejb3Deployment deployment)
{
super(Ejb3Module.BASE_EJB3_JMX_NAME + ",name=" + ejbName, manager, cl, beanClassName, ejbName, ctxProperties, interceptorRepository, deployment);
proxyDeployer = new ProxyDeployer(this);
}
public Class getInvokedBusinessInterface()
{
InvokedMethod method = invokedMethod.get();
if (method == null) throw new IllegalStateException("getInvokedBusinessInterface() being invoked outside of a business invocation");
if (method.method == null) throw new IllegalStateException("getInvokedBusinessInterface() being invoked outside of a business invocation");
if (method.isLocalInterface) return method.method.getDeclaringClass();
Class[] remoteInterfaces = ProxyFactoryHelper.getRemoteInterfaces(this);
for (Class intf : remoteInterfaces)
{
try
{
intf.getMethod(method.method.getName(), method.method.getParameterTypes());
return intf;
}
catch (NoSuchMethodException ignored)
{
// continue
}
}
throw new IllegalStateException("Unable to find geInvokedBusinessInterface()");
}
@Override
public void instantiated()
{
super.instantiated();
proxyDeployer.initializeRemoteBindingMetadata();
proxyDeployer.initializeLocalBindingMetadata();
}
@Override
public void processMetadata(DependencyPolicy dependencyPolicy)
{
super.processMetadata(dependencyPolicy);
}
public void start() throws Exception
{
super.start();
// So that Remoting layer can reference this container easily.
Dispatcher.singleton.registerTarget(getObjectName().getCanonicalName(), this);
proxyDeployer.start();
}
public Map getClusterFamilies()
{
return clusterFamilies;
}
public void stop() throws Exception
{
try
{
proxyDeployer.stop();
}
catch (Exception ignore)
{
log.trace("Proxy deployer stop failed", ignore);
}
try
{
Dispatcher.singleton.unregisterTarget(getObjectName().getCanonicalName());
}
catch (Exception ignore)
{
log.trace("Dispatcher unregister target failed", ignore);
}
super.stop();
}
protected void createMethodMap()
{
super.createMethodMap();
try
{
RemoteHome home = (RemoteHome) resolveAnnotation(RemoteHome.class);
if (home != null)
{
Method[] declaredMethods = home.value().getMethods();
for (int i = 0; i < declaredMethods.length; i++)
{
long hash = MethodHashing.methodHash(declaredMethods[i]);
advisedMethods.put(hash, declaredMethods[i]);
}
declaredMethods = javax.ejb.EJBObject.class.getMethods();
for (int i = 0; i < declaredMethods.length; i++)
{
long hash = MethodHashing.methodHash(declaredMethods[i]);
advisedMethods.put(hash, declaredMethods[i]);
}
}
LocalHome localHome = (LocalHome) resolveAnnotation(LocalHome.class);
if (localHome != null)
{
Method[] declaredMethods = localHome.value().getMethods();
for (int i = 0; i < declaredMethods.length; i++)
{
long hash = MethodHashing.methodHash(declaredMethods[i]);
advisedMethods.put(hash, declaredMethods[i]);
}
declaredMethods = javax.ejb.EJBLocalObject.class.getMethods();
for (int i = 0; i < declaredMethods.length; i++)
{
long hash = MethodHashing.methodHash(declaredMethods[i]);
advisedMethods.put(hash, declaredMethods[i]);
}
}
}
catch (Exception e)
{
throw new RuntimeException(e);
}
}
protected boolean isHomeMethod(Method method)
{
if (javax.ejb.EJBHome.class.isAssignableFrom(method.getDeclaringClass())) return true;
if (javax.ejb.EJBLocalHome.class.isAssignableFrom(method.getDeclaringClass())) return true;
return false;
}
protected boolean isEJBObjectMethod(Method method)
{
if (method.getDeclaringClass().getName().equals("javax.ejb.EJBObject"))
return true;
if (method.getDeclaringClass().getName().equals("javax.ejb.EJBLocalObject"))
return true;
return false;
}
protected boolean isHandleMethod(Method method)
{
if (method.getDeclaringClass().getName().equals("javax.ejb.Handle"))
return true;
return false;
}
public static InvocationResponse marshallException(Invocation invocation, Throwable exception, Map responseContext) throws Throwable
{
if (!invocation.getMetaData().hasTag(IsLocalInterceptor.IS_LOCAL)) throw exception;
InvocationResponse response = new InvocationResponse();
response.setContextInfo(responseContext);
response.addAttachment(IsLocalInterceptor.IS_LOCAL_EXCEPTION, new MarshalledObjectForLocalCalls(exception));
return response;
}
public static InvocationResponse marshallResponse(Invocation invocation, Object rtn, Map responseContext)
throws java.io.IOException
{
InvocationResponse response;
// marshall return value
if (rtn != null && invocation.getMetaData().hasTag(IsLocalInterceptor.IS_LOCAL))
{
response = new InvocationResponse(new MarshalledObjectForLocalCalls(rtn));
}
else
{
response = new InvocationResponse(rtn);
}
response.setContextInfo(responseContext);
return response;
}
/**
* Invoke a method on the virtual EJB bean. The method must be one of the methods defined in one
* of the business interfaces (or home interface) of the bean.
*
* TODO: work in progress
*
* @param factory the originating end point
* @param id unique identifier (primary key), can be null for stateless
* @param method the business or home method to invoke
* @param args the arguments for the method
* @param provider for asynchronous usage
*/
public Object invoke(ProxyFactory factory, Object id, Method method, Object args[], FutureHolder provider) throws Throwable
{
ClassLoader oldLoader = Thread.currentThread().getContextClassLoader();
pushEnc();
try
{
long hash = MethodHashing.calculateHash(method);
MethodInfo info = (MethodInfo) methodInterceptors.get(hash);
if (info == null)
{
throw new RuntimeException(
"Could not resolve beanClass method from proxy call: "
+ method.toString());
}
Method unadvisedMethod = info.getUnadvisedMethod();
if (unadvisedMethod != null && isHomeMethod(unadvisedMethod))
{
return invokeHomeMethod(factory, info, args);
}
else if (unadvisedMethod != null && isEJBObjectMethod(unadvisedMethod))
{
return invokeEJBObjectMethod(factory, id, info, args);
}
// FIXME: Ahem, stateful container invocation works on all.... (violating contract though)
EJBContainerInvocation nextInvocation = new StatefulContainerInvocation(info, id);
nextInvocation.setAdvisor(this);
nextInvocation.setArguments(args);
// allow a container to supplement information into an invocation
nextInvocation = populateInvocation(nextInvocation);
ProxyUtils.addLocalAsynchronousInfo(nextInvocation, provider);
try
{
invokedMethod.push(new InvokedMethod(true, method));
return nextInvocation.invokeNext();
}
finally
{
invokedMethod.pop();
}
}
finally
{
Thread.currentThread().setContextClassLoader(oldLoader);
popEnc();
}
}
/**
* TODO: work in progress (refactor both invokeHomeMethod's, localHomeInvoke)
*/
private Object invokeHomeMethod(ProxyFactory factory, MethodInfo info, Object args[]) throws Exception
{
Method unadvisedMethod = info.getUnadvisedMethod();
if (unadvisedMethod.getName().equals("create"))
{
Class[] initParameterTypes = {};
Object[] initParameterValues = {};
if (unadvisedMethod.getParameterTypes().length > 0)
{
initParameterTypes = unadvisedMethod.getParameterTypes();
initParameterValues = args;
}
Object id = createSession(initParameterTypes, initParameterValues);
Object proxy = factory.createProxy(id);
return proxy;
}
else if (unadvisedMethod.getName().equals("remove"))
{
if(args[0] instanceof Handle)
removeHandle((Handle) args[0]);
else
destroySession(args[0]);
return null;
}
else
{
throw new IllegalArgumentException("illegal home method " + unadvisedMethod);
}
}
/**
* Create session to an EJB bean.
*
* @param initParameterTypes the parameter types used by the home's create method
* @param initParameterValues the arguments for the home's create method
* @return the identifier of the session
*/
abstract protected Object createSession(Class initParameterTypes[], Object initParameterValues[]);
/**
* Destroy a created session.
*
* @param id the identifier of the session
*/
protected void destroySession(Object id)
{
throw new RuntimeException("NYI");
}
protected Object invokeEJBObjectMethod(ProxyFactory factory, Object id, MethodInfo info, Object args[]) throws Exception
{
Method unadvisedMethod = info.getUnadvisedMethod();
if(unadvisedMethod.getName().equals("getEJBHome"))
{
return factory.createHomeProxy();
}
if(unadvisedMethod.getName().equals("getPrimaryKey"))
{
return id;
}
if(unadvisedMethod.getName().equals("isIdentical"))
{
// object has no identity
if(id == null)
return false;
EJBObject bean = (EJBObject) args[0];
Object primaryKey = bean.getPrimaryKey();
if(primaryKey == null)
return false;
boolean isIdentical = id.equals(primaryKey);
return isIdentical;
}
if (unadvisedMethod.getName().equals("remove"))
{
destroySession(id);
return null;
}
throw new RuntimeException("NYI");
}
/**
* Allow a container sub class to supplement an invocation. Per default nothing to supplement.
*
* @param invocation
* @return
*/
protected EJBContainerInvocation populateInvocation(EJBContainerInvocation invocation)
{
return invocation;
}
abstract protected void removeHandle(Handle handle) throws Exception;
} |
