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/*
 * JBoss, Home of Professional Open Source
 * Copyright 2006, Red Hat Middleware LLC, and individual contributors
 * as indicated by the @author tags. 
 * See the copyright.txt in the distribution for a full listing 
 * of individual contributors.
 * This copyrighted material is made available to anyone wishing to use,
 * modify, copy, or redistribute it subject to the terms and conditions
 * of the GNU Lesser General Public License, v. 2.1.
 * This program is distributed in the hope that it will be useful, but WITHOUT A
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
 * PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more details.
 * You should have received a copy of the GNU Lesser General Public License,
 * v.2.1 along with this distribution; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA  02110-1301, USA.
 * 
 * (C) 2005-2006,
 * @author JBoss Inc.
 */
package com.arjuna.mw.wst.deploy;

import java.io.FileNotFoundException;

import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;

import com.arjuna.common.internal.util.propertyservice.BeanPopulator;
import org.jboss.jbossts.xts.environment.WSTEnvironmentBean;

import com.arjuna.mw.wst.*;
import com.arjuna.mw.wstx.logging.wstxLogger;
import com.arjuna.webservices.util.ClassLoaderHelper;
import com.arjuna.services.framework.startup.Sequencer;
import org.jboss.jbossts.xts.environment.XTSPropertyManager;

/**
 * Initialise WSTX.
 * @author kevin
 */
public class WSTXInitialisation implements ServletContextListener
{
    /**
     * The context has been initialized.
     * @param servletContextEvent The servlet context event.
     * 
     */
    public void contextInitialized(final ServletContextEvent servletContextEvent)
    {
        final WSTXInitialisation listener = this;

        Sequencer.Callback callback = new Sequencer.Callback(Sequencer.SEQUENCE_WSCOOR10, Sequencer.WEBAPP_WSTX10) {
           public void run() {
               try
               {
                   listener.configure();
               }
               catch (Exception exception)
               {
                   wstxLogger.i18NLogger.error_mw_wst_deploy_WSTXI_1(exception);
               }
               catch (Error error) {
                   wstxLogger.i18NLogger.error_mw_wst_deploy_WSTXI_1(error);
               }
           }
        };
        // this is the last WST callback to be initialised so close the list
        Sequencer.close(Sequencer.SEQUENCE_WSCOOR10, Sequencer.WEBAPP_WSTX10);
    }
    
    /**
     * Configure WSTX client API implementations.
     * 
     */
    private void configure()
        throws Exception
    {
        WSTEnvironmentBean wstEnvironmentBean = XTSPropertyManager.getWSTEnvironmentBean();
        final String userTx = wstEnvironmentBean.getUserTransaction10();
        final String txManager = wstEnvironmentBean.getTransactionManager10();
        final String userBa = wstEnvironmentBean.getUserBusinessActivity10();
        final String baManager = wstEnvironmentBean.getBusinessActivityManager10();

        if ((userTx == null) || (txManager == null) || (userBa == null) || (baManager == null))
        {
            // we  allow all the client classes to be null here in case someone wants to deploy a coordinator/server
            // only implementation. they will still need to install the API classes but not the implementation
            // code
            if (! (userTx == null && txManager == null && userBa == null && baManager == null)) {
                throw new FileNotFoundException(wstxLogger.i18NLogger.get_mw_wst_deploy_WSTXI_23());
            }
        }

        UserTransaction.setUserTransaction((UserTransaction)ClassLoaderHelper.forName(getClass(), userTx).newInstance()) ;
        TransactionManager.setTransactionManager((TransactionManager)ClassLoaderHelper.forName(getClass(), txManager).newInstance()) ;
        UserBusinessActivity.setUserBusinessActivity((UserBusinessActivity)ClassLoaderHelper.forName(getClass(), userBa).newInstance()) ;
        BusinessActivityManager.setBusinessActivityManager((BusinessActivityManager)ClassLoaderHelper.forName(getClass(), baManager).newInstance()) ;
    }

    /**
     * The context is about to be destroyed.
     * @param servletContextEvent The servlet context event.
     */
    public void contextDestroyed(final ServletContextEvent servletContextEvent)
    {
    }
}