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Tomcat example source code file (javaURLContextFactory.java)

This example Tomcat source code file (javaURLContextFactory.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Tomcat tags/keywords

context, context, hashtable, initialcontextfactory, main, main, name, naming, namingexception, namingexception, object, objectfactory, selectorcontext, selectorcontext, string, util

The Tomcat javaURLContextFactory.java source code

/*
 * 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.Name;
import javax.naming.Context;
import javax.naming.NamingException;
import javax.naming.spi.ObjectFactory;
import javax.naming.spi.InitialContextFactory;
import org.apache.naming.SelectorContext;
import org.apache.naming.NamingContext;
import org.apache.naming.ContextBindings;

/**
 * Context factory for the "java:" namespace.
 * <p>
 * <b>Important note : 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 $Revision: 467222 $ $Date: 2006-10-24 05:17:11 +0200 (mar., 24 oct. 2006) $
 */

public class javaURLContextFactory
    implements ObjectFactory, InitialContextFactory {


    // ----------------------------------------------------------- Constructors


    // -------------------------------------------------------------- Constants


    public static final String MAIN = "initialContext";


    // ----------------------------------------------------- Instance Variables


    /**
     * Initial context.
     */
    protected static 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(environment);
        } else {
            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(environment, true);
        } else {
            // If the thread is not bound, return a shared writable context
            if (initialContext == null)
                initialContext = new NamingContext(environment, MAIN);
            return initialContext;
        }
    }


}

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