/*
* JBoss, Home of Professional Open Source.
* Copyright 2008, 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.aspects.remoting.interceptors.invoker;
import org.jboss.aop.advice.Interceptor;
import org.jboss.aop.joinpoint.Invocation;
import org.jboss.aspects.remoting.interceptors.marshall.MarshallInterceptor;
import org.jboss.aspects.remoting.interceptors.transport.TransportInterceptor;
import org.jboss.remoting.Client;
import org.jboss.remoting.InvokerLocator;
import org.jboss.remoting.marshal.MarshalFactory;
import org.jboss.remoting.marshal.Marshaller;
import java.util.ArrayList;
import java.util.Map;
/**
* @author <a href="mailto:telrod@e2technologies.net">Tom Elrod</a>
*/
public class RemotingInterceptorFactory
{
public static final String REMOTING = "REMOTING";
public static final String INVOKER_LOCATOR = "INVOKER_LOCATOR";
public static final String SUBSYSTEM = "SUBSYSTEM";
public static final String MARSHALLER = "MARSHALLER";
public static final String LOADER = "LOADER";
public static Invocation injectRemotingInterceptors(Invocation invocation)
{
Invocation newInvocation = null;
// Have to first get the locator from the invocation
InvokerLocator locator = (InvokerLocator) invocation.getMetaData(REMOTING, INVOKER_LOCATOR);
if (locator != null)
{
Interceptor[] newInterceptor = null;
ArrayList interceptorList = new ArrayList();
// First need to determine which marshalling interceptors are needed
String dataType = (String) invocation.getMetaData(REMOTING, InvokerLocator.DATATYPE);
if (dataType == null)
{
dataType = getDataType(locator);
}
if (dataType != null)
{
// If found data type, will get marshaller and create interceptor wrapper for it
// and then insert into interceptor chain
Marshaller marshaller = MarshalFactory.getMarshaller(dataType);
MarshallInterceptor marshallInterceptor = new MarshallInterceptor(marshaller);
interceptorList.add(marshallInterceptor);
}
// Now onto creating transport interceptor
ClassLoader loader = (ClassLoader) invocation.getMetaData(REMOTING, LOADER);
String subsystem = (String) invocation.getMetaData(REMOTING, SUBSYSTEM);
Client client = null;
try
{
if (loader != null)
{
client = new Client(loader, locator, subsystem, null);
}
else
{
client = new Client(locator, subsystem);
}
}
catch (Exception e)
{
throw new RuntimeException("Could not create remoting client.", e);
}
TransportInterceptor transportInterceptor = new TransportInterceptor(client);
interceptorList.add(transportInterceptor);
//TODO -TME Important to note that this will actually be appending new interceptors
// to end of chain based on my understanding of implementation. This is fine unless
// the InvokerInterceptor is NOT the final interceptor in the chain as there may
// be side effects that will cause problems.
// Should have all new remoting interceptors, so create new invocation
newInterceptor = (Interceptor[]) interceptorList.toArray(new Interceptor[interceptorList.size()]);
newInvocation = invocation.getWrapper(newInterceptor);
}
else
{
throw new RuntimeException("Require InvokerLocator to make remote invocations.");
}
return newInvocation;
}
private static String getDataType(InvokerLocator locator)
{
String type = null;
if (locator != null)
{
Map params = locator.getParameters();
if (params != null)
{
type = (String) params.get(InvokerLocator.DATATYPE);
}
}
return type;
}
}