/*
* 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.proxy.ejb;
import java.io.Externalizable;
import java.lang.reflect.Method;
import javax.ejb.EJBHome;
import javax.ejb.EJBObject;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import org.jboss.invocation.Invocation;
import org.jboss.invocation.InvocationKey;
import org.jboss.invocation.InvocationContext;
import org.jboss.proxy.Interceptor;
/**
* The base EJB behavior interceptor.
*
* @author <a href="mailto:marc.fleury@jboss.org">Marc Fleury</a>
* @author Scott.Stark@jboss.org
* @version $Revision: 81030 $
*/
public abstract class GenericEJBInterceptor
extends Interceptor
implements Externalizable
{
/** Serial Version Identifier. @since 1.3 */
private static final long serialVersionUID = 3844706474734439975L;
// Static method references
protected static final Method TO_STRING;
protected static final Method HASH_CODE;
protected static final Method EQUALS;
protected static final Method GET_PRIMARY_KEY;
protected static final Method GET_HANDLE;
protected static final Method GET_EJB_HOME;
protected static final Method IS_IDENTICAL;
/** Initialize the static variables. */
static
{
try
{
// Get the methods from Object
Class[] empty = {};
Class type = Object.class;
TO_STRING = type.getMethod("toString", empty);
HASH_CODE = type.getMethod("hashCode", empty);
EQUALS = type.getMethod("equals", new Class[] { type });
// Get the methods from EJBObject
type = EJBObject.class;
GET_PRIMARY_KEY = type.getMethod("getPrimaryKey", empty);
GET_HANDLE = type.getMethod("getHandle", empty);
GET_EJB_HOME = type.getMethod("getEJBHome", empty);
IS_IDENTICAL = type.getMethod("isIdentical", new Class[] { type });
}
catch (Exception e)
{
e.printStackTrace();
throw new ExceptionInInitializerError(e);
}
}
/**
* A public, no-args constructor for externalization to work.
*/
public GenericEJBInterceptor()
{
// For externalization to work
}
protected EJBHome getEJBHome(Invocation invocation) throws NamingException
{
// Look to the context for the home
InvocationContext ctx = invocation.getInvocationContext();
EJBHome home = (EJBHome) ctx.getValue(InvocationKey.EJB_HOME);
// If there is no home use the legacy lookup method
if( home == null )
{
String jndiName = (String) ctx.getValue(InvocationKey.JNDI_NAME);
InitialContext iniCtx = new InitialContext();
home = (EJBHome) iniCtx.lookup(jndiName);
}
return home;
}
}