Jetty example source code file (Configuration.java)

This example Jetty source code file (Configuration.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 - Jetty tags/keywords

abstractconfiguration, class, class, classloader, configuration, context, context, exception, exception, initialcontext, initialcontext, namenotfoundexception, naming, no, random, util

The Jetty Configuration.java source code

// ========================================================================
// $Id: Configuration.java 2118 2007-10-01 02:58:25Z gregw $
// Copyright 2006 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// Licensed 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.mortbay.jetty.plus.webapp;

import java.util.Random;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NameNotFoundException;

import org.mortbay.jetty.plus.naming.EnvEntry;
import org.mortbay.jetty.plus.naming.NamingEntry;
import org.mortbay.jetty.plus.naming.Resource;
import org.mortbay.jetty.plus.naming.Transaction;
import org.mortbay.jetty.plus.servlet.ServletHandler;
import org.mortbay.jetty.security.SecurityHandler;
import org.mortbay.log.Log;


/**
 * Configuration
 *
 *
 */
public class Configuration extends AbstractConfiguration
{

    private Integer _key;
    
    
    public Configuration ()
    {

    }
    
    /** 
     * @see org.mortbay.jetty.plus.webapp.AbstractConfiguration#bindEnvEntry(java.lang.String, java.lang.String)
     * @param name
     * @param value
     * @throws Exception
     */
    public void bindEnvEntry(String name, Object value) throws Exception
    {    
        EnvEntry.bindToENC(name, name, value);
    }

    /** 
     * Bind a resource reference.
     * 
     * If a resource reference with the same name is in a jetty-env.xml
     * file, it will already have been bound.
     * 
     * @see org.mortbay.jetty.plus.webapp.AbstractConfiguration#bindResourceRef(java.lang.String)
     * @param name
     * @throws Exception
     */
    public void bindResourceRef(String name, Class typeClass)
    throws Exception
    {
        NamingEntry.bindToENC(name, name, Resource.class);
    }

    /** 
     * @see org.mortbay.jetty.plus.webapp.AbstractConfiguration#bindResourceEnvRef(java.lang.String)
     * @param name
     * @throws Exception
     */
    public void bindResourceEnvRef(String name, Class typeClass)
    throws Exception
    {
        NamingEntry.bindToENC(name, name, Resource.class);
    }
    
    
    public void bindMessageDestinationRef(String name, Class typeClass)
    throws Exception
    {
        NamingEntry.bindToENC(name, name, Resource.class);
    }
    
    public void bindUserTransaction ()
    throws Exception
    {
        try
        {
            NamingEntry.bindToENC(Transaction.USER_TRANSACTION,Transaction.USER_TRANSACTION, Transaction.class);
        }
        catch (NameNotFoundException e)
        {
            Log.info("No Transaction manager found - if your webapp requires one, please configure one.");
        }
    }
    
    public void configureClassLoader ()
    throws Exception
    {      
        super.configureClassLoader();
    }

    
    public void configureDefaults ()
    throws Exception
    {
        super.configureDefaults();
    }


    public void configureWebApp ()
    throws Exception
    {
        super.configureWebApp();
        //lock this webapp's java:comp namespace as per J2EE spec
        ClassLoader oldLoader = Thread.currentThread().getContextClassLoader();
        Thread.currentThread().setContextClassLoader(getWebAppContext().getClassLoader());
        lockCompEnv();
        Thread.currentThread().setContextClassLoader(oldLoader);
    }
    
    public void deconfigureWebApp() throws Exception
    {
        ClassLoader oldLoader = Thread.currentThread().getContextClassLoader();
        Thread.currentThread().setContextClassLoader(getWebAppContext().getClassLoader());
        unlockCompEnv();
        Thread.currentThread().setContextClassLoader(oldLoader);
        super.deconfigureWebApp();
    }
    
    protected void lockCompEnv ()
    throws Exception
    {
        Random random = new Random ();
        _key = new Integer(random.nextInt());
        Context context = new InitialContext();
        Context compCtx = (Context)context.lookup("java:comp");
        compCtx.addToEnvironment("org.mortbay.jndi.lock", _key);
    }
    
    protected void unlockCompEnv ()
    throws Exception
    {
        if (_key!=null)
        {
            Context context = new InitialContext();
            Context compCtx = (Context)context.lookup("java:comp");
            compCtx.addToEnvironment("org.mortbay.jndi.unlock", _key); 
        }
    }

    /** 
     * @see org.mortbay.jetty.plus.webapp.AbstractConfiguration#parseAnnotations()
     */
    public void parseAnnotations() throws Exception
    {
        Log.info(getClass().getName()+" does not support annotations on source. Use org.mortbay.jetty.annotations.Configuration instead");
    }
    
}