org.apache.naming.factory.EjbFactory Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.naming.factory;
import java.util.Hashtable;
import javax.naming.Name;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.naming.Reference;
import javax.naming.RefAddr;
import javax.naming.spi.ObjectFactory;
import org.apache.naming.EjbRef;
/**
* Object factory for EJBs.
*
* @author Remy Maucherat
* @version $Id: EjbFactory.java 939311 2010-04-29 14:01:02Z kkolinko $
*/
public class EjbFactory
implements ObjectFactory {
// ----------------------------------------------------------- Constructors
// -------------------------------------------------------------- Constants
// ----------------------------------------------------- Instance Variables
// --------------------------------------------------------- Public Methods
// -------------------------------------------------- ObjectFactory Methods
/**
* Create a new EJB instance.
*
* @param obj The reference object describing the DataSource
*/
public Object getObjectInstance(Object obj, Name name, Context nameCtx,
Hashtable environment)
throws Exception {
if (obj instanceof EjbRef) {
Reference ref = (Reference) obj;
// If ejb-link has been specified, resolving the link using JNDI
RefAddr linkRefAddr = ref.get(EjbRef.LINK);
if (linkRefAddr != null) {
// Retrieving the EJB link
String ejbLink = linkRefAddr.getContent().toString();
Object beanObj = (new InitialContext()).lookup(ejbLink);
// Load home interface and checking if bean correctly
// implements specified home interface
/*
String homeClassName = ref.getClassName();
try {
Class home = Class.forName(homeClassName);
if (home.isInstance(beanObj)) {
System.out.println("Bean of type "
+ beanObj.getClass().getName()
+ " implements home interface "
+ home.getName());
} else {
System.out.println("Bean of type "
+ beanObj.getClass().getName()
+ " doesn't implement home interface "
+ home.getName());
throw new NamingException
("Bean of type " + beanObj.getClass().getName()
+ " doesn't implement home interface "
+ home.getName());
}
} catch (ClassNotFoundException e) {
System.out.println("Couldn't load home interface "
+ homeClassName);
}
*/
return beanObj;
}
ObjectFactory factory = null;
RefAddr factoryRefAddr = ref.get(Constants.FACTORY);
if (factoryRefAddr != null) {
// Using the specified factory
String factoryClassName =
factoryRefAddr.getContent().toString();
// Loading factory
ClassLoader tcl =
Thread.currentThread().getContextClassLoader();
Class factoryClass = null;
if (tcl != null) {
try {
factoryClass = tcl.loadClass(factoryClassName);
} catch(ClassNotFoundException e) {
NamingException ex = new NamingException
("Could not load resource factory class");
ex.initCause(e);
throw ex;
}
} else {
try {
factoryClass = Class.forName(factoryClassName);
} catch(ClassNotFoundException e) {
NamingException ex = new NamingException
("Could not load resource factory class");
ex.initCause(e);
throw ex;
}
}
if (factoryClass != null) {
try {
factory = (ObjectFactory) factoryClass.newInstance();
} catch(Throwable t) {
NamingException ex = new NamingException
("Could not load resource factory class");
ex.initCause(t);
throw ex;
}
}
} else {
String javaxEjbFactoryClassName =
System.getProperty("javax.ejb.Factory",
Constants.OPENEJB_EJB_FACTORY);
try {
factory = (ObjectFactory)
Class.forName(javaxEjbFactoryClassName).newInstance();
} catch(Throwable t) {
if (t instanceof NamingException)
throw (NamingException) t;
NamingException ex = new NamingException
("Could not create resource factory instance");
ex.initCause(t);
throw ex;
}
}
if (factory != null) {
return factory.getObjectInstance
(obj, name, nameCtx, environment);
} else {
throw new NamingException
("Cannot create resource instance");
}
}
return null;
}
}