| /* |
| * 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.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.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 |
| */ |
| 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. |
| */ |
| @SuppressWarnings("unchecked") |
| @Override |
| 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. |
| */ |
| @SuppressWarnings("unchecked") |
| @Override |
| 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(javaURLContextFactory.class) { |
| if (initialContext == null) { |
| initialContext = new NamingContext( |
| (Hashtable<String,Object>)environment, MAIN); |
| } |
| } |
| } |
| return initialContext; |
| } |
| |
| |
| } |
| |