/*
* 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.java;
import java.util.Hashtable;
import javax.naming.Context;
import javax.naming.Name;
import javax.naming.NamingException;
import javax.naming.spi.InitialContextFactory;
import javax.naming.spi.ObjectFactory;
import org.apache.naming.ContextBindings;
import org.apache.naming.NamingContext;
import org.apache.naming.SelectorContext;
/**
* Context factory for the "java:" namespace.
* <p>
* <b>Important note</b> : This factory MUST be associated with the "java" URL
* prefix, which can be done by either :
* <ul>
* <li>Adding a
* java.naming.factory.url.pkgs=org.apache.catalina.util.naming property
* to the JNDI properties file</li>
* <li>Setting an environment variable named Context.URL_PKG_PREFIXES with
* its value including the org.apache.catalina.util.naming package name.
* More detail about this can be found in the JNDI documentation :
* {@link javax.naming.spi.NamingManager#getURLContext(java.lang.String, java.util.Hashtable)}.</li>
* </ul>
*
* @author Remy Maucherat
* @version $Id: javaURLContextFactory.java 987920 2010-08-22 15:34:34Z markt $
*/
public class javaURLContextFactory
implements ObjectFactory, InitialContextFactory {
// ----------------------------------------------------------- Constructors
// -------------------------------------------------------------- Constants
public static final String MAIN = "initialContext";
// ----------------------------------------------------- Instance Variables
/**
* Initial context.
*/
protected static volatile Context initialContext = null;
// --------------------------------------------------------- Public Methods
// -------------------------------------------------- ObjectFactory Methods
/**
* Crete a new Context's instance.
*/
public Object getObjectInstance(Object obj, Name name, Context nameCtx,
Hashtable<?,?> environment)
throws NamingException {
if ((ContextBindings.isThreadBound()) ||
(ContextBindings.isClassLoaderBound())) {
return new SelectorContext((Hashtable<String,Object>)environment);
}
return null;
}
/**
* Get a new (writable) initial context.
*/
public Context getInitialContext(Hashtable<?,?> environment)
throws NamingException {
if (ContextBindings.isThreadBound() ||
(ContextBindings.isClassLoaderBound())) {
// Redirect the request to the bound initial context
return new SelectorContext(
(Hashtable<String,Object>)environment, true);
}
// If the thread is not bound, return a shared writable context
if (initialContext == null) {
synchronized(getClass()) {
if (initialContext == null) {
initialContext = new NamingContext(
(Hashtable<String,Object>)environment, MAIN);
}
}
}
return initialContext;
}
}