alvinalexander.com | career | drupal | java | mac | mysql | perl | scala | uml | unix  

Glassfish example source code file (WrappedSerialContext.java)

This example Glassfish source code file (WrappedSerialContext.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 - Glassfish tags/keywords

context, context, initialcontext, naming, namingexception, namingexception, override, override, serialcontext, string, string, util, wrappedserialcontext

The Glassfish WrappedSerialContext.java source code

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2009-2010 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package com.sun.enterprise.naming.impl;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.Name;
import javax.naming.NamingException;
import javax.naming.spi.NamingManager;
import java.util.Hashtable;

/**
 * This is a Wrapper for {@link SerialContext}.
 * This is used by {@link SerialInitContextFactory} when NamingManager is set
 * up with an InitialContextFactoryBuilder. The reason for having this class
 * is described below:
 * When there is no builder setup, {@link InitialContext} uses a discovery
 * mechanism to handle URL strings as described in
 * {@link NamingManager#getURLContext(String, java.util.Hashtable)}. But,
 * when a builder is set up, it by-passes this logic and delegates to whatever
 * Context is returned by
 * builder.createInitialContextFactory(env).getInitialContext(env).
 * In our case, this results in SerialContext, which does not know how to handle
 * all kinds of URL strings. So, we want to returns a WrapperSerialContext
 * that delegates to appropriate URLContext whenever possible.
 *
 * @author Sanjeeb.Sahoo@Sun.COM
 */
public class WrappedSerialContext extends InitialContext
{
    /*
     * Implementation Note:
     * It extends InitialContext and overrides getURLOrDefaultInitCtx methods.
     * This is a very sensitive class. Take extreme precautions while changing.
     */

    // Not for public use.
    /* prackage */ WrappedSerialContext(Hashtable environment,
                                        SerialContext serialContext)
                                        throws NamingException
    {
        super(environment);
        defaultInitCtx = serialContext; // this is our default context
        gotDefault = true;
    }

    @Override
    protected void init(Hashtable environment) throws NamingException
    {
        // Don't bother merging with application resources  or system
        // properties, as that has already happened when user called
        // new InitialContext. So, just store it.
        myProps = environment;
    }

    @Override
    protected Context getDefaultInitCtx() throws NamingException
    {
        return defaultInitCtx;
    }

    @Override
    protected Context getURLOrDefaultInitCtx(String name) throws NamingException
    {
        String scheme = getURLScheme(name);
        if (scheme != null)
        {
            Context ctx = NamingManager.getURLContext(scheme, myProps);
            if (ctx != null)
            {
                return ctx;
            }
        }
        return getDefaultInitCtx();
    }

    @Override
    protected Context getURLOrDefaultInitCtx(Name name) throws NamingException
    {
        if (name.size() > 0)
        {
            String first = name.get(0);
            String scheme = getURLScheme(first);
            if (scheme != null)
            {
                Context ctx = NamingManager.getURLContext(scheme, myProps);
                if (ctx != null)
                {
                    return ctx;
                }
            }
        }
        return getDefaultInitCtx();
    }

    /**
     * Return URL scheme component from this string. Returns null if there
     * is no scheme.
     *
     * @param str
     * @return
     * @see javax.naming.spi.NamingManager#getURLScheme
     */
    private static String getURLScheme(String str)
    {
        // Implementation is copied from
        // javax.naming.spi.NamingManager#getURLScheme
        int colon_posn = str.indexOf(':');
        int slash_posn = str.indexOf('/');

        if (colon_posn > 0 && (slash_posn == -1 || colon_posn < slash_posn))
        {
            return str.substring(0, colon_posn);
        }
        return null;
    }

}

Other Glassfish examples (source code examples)

Here is a short list of links related to this Glassfish WrappedSerialContext.java source code file:

... this post is sponsored by my books ...

#1 New Release!

FP Best Seller

 

new blog posts

 

Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.