/*
* 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.naming.client.java;
import java.util.Hashtable;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.security.AccessController;
import java.security.PrivilegedAction;
import javax.naming.Context;
import javax.naming.Name;
import javax.naming.NameClassPair;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import javax.naming.InitialContext;
import javax.naming.OperationNotSupportedException;
import javax.naming.NameParser;
import javax.naming.spi.ObjectFactory;
import org.jboss.corba.ORBFactory;
import org.jboss.logging.Logger;
/** The external client java URL context factory. This is used in conjunction
* with j2ee application clients to implement the java:comp/env
* enterprise naming context (ENC).
*
* @see javax.naming.spi.ObjectFactory
*
* @author Scott.Stark@jboss.org
* @version $Revision: 81030 $
*/
public class javaURLContextFactory
implements ObjectFactory
{
private static final Logger log = Logger.getLogger(javaURLContextFactory.class);
public static final String J2EE_CLIENT_NAME_PROP = "j2ee.clientName";
// ObjectFactory implementation ----------------------------------
public Object getObjectInstance(Object obj, Name name, Context nameCtx,
Hashtable env)
throws Exception
{
// Get the j2ee.clientName value
String clientName = (String) env.get(J2EE_CLIENT_NAME_PROP);
if (clientName == null)
{
// Look for the name as a system property
clientName = (String) AccessController.doPrivileged(
new PrivilegedAction()
{
public Object run()
{
try
{
return System.getProperty(J2EE_CLIENT_NAME_PROP);
}
catch (SecurityException e)
{
return null;
}
}
}
);
if (clientName == null)
throw new NamingException("Failed to find j2ee.clientName in jndi env");
}
Object result = null;
if (nameCtx == null)
nameCtx = new InitialContext(env);
if (obj == null)
{
// Create a context for resolving the java: url
InvocationHandler handler = new EncContextProxy(nameCtx, clientName);
ClassLoader loader = Thread.currentThread().getContextClassLoader();
Class[] ifaces = {Context.class};
result = Proxy.newProxyInstance(loader, ifaces, handler);
}
return result;
}
private static class EncContextProxy implements InvocationHandler
{
Context lookupCtx;
String clientName;
EncContextProxy(Context lookupCtx, String clientName)
{
this.lookupCtx = lookupCtx;
this.clientName = clientName;
}
/**
*/
public Object invoke(Object proxy, Method method, Object[] args)
throws Throwable
{
String methodName = method.getName();
if (methodName.equals("toString") == true)
return "Client ENC(" + clientName + ")";
if (methodName.equals("lookup") == false)
throw new OperationNotSupportedException("Only lookup is supported, op=" + method);
NameParser parser = lookupCtx.getNameParser("");
Name name = null;
if (args[0] instanceof String)
name = parser.parse((String) args[0]);
else
name = (Name) args[0];
// Check for special objects not in the env
if (name.size() < 2 || "java:comp".equals(name.get(0)) == false || "env".equals(name.get(1)) == false)
return getSpecialObject(name);
// Lookup the client application context from the server
Context clientCtx = (Context) lookupCtx.lookup(clientName);
// JBAS-3967: EJB3 Client container hack
try
{
clientCtx = (Context) clientCtx.lookup("env");
}
catch(NamingException e)
{
// ignore
log.trace("No env sub context found", e);
}
// Strip the comp/env prefix
Name bindingName = name.getSuffix(2);
Object binding = clientCtx.lookup(bindingName);
return binding;
}
public Object getSpecialObject(Name name) throws NamingException
{
if (name.size() > 0 && "java:comp".equals(name.get(0)))
{
if (name.size() == 2 && "ORB".equals(name.get(1)))
return ORBFactory.getORB();
else if (name.size() == 2 && "HandleDelegate".equals(name.get(1)))
return HandleDelegateFactory.getHandleDelegateSingleton();
}
throw new NamingException("Name not found " + name);
}
}
}