Package org.apache.tuscany.sca.host.webapp

Source Code of org.apache.tuscany.sca.host.webapp.SCADomainHelper

/*
* 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.tuscany.sca.host.webapp;

import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;

import javax.servlet.ServletContext;

import org.apache.tuscany.sca.host.embedded.SCADomain;

/**
* Utility class to initialize the SCADomian associated with a webapp
*/
public class SCADomainHelper {

    public static final String SCA_DOMAIN_ATTRIBUTE = "org.apache.tuscany.sca.SCADomain";

    /**
     * Initializes the SCADomian associated with a webapp context. If a SCADomain
     * doesn't exist already then one is create based on the webapp config.
     */
    public static SCADomain initSCADomain(ServletContext servletContext) {
        SCADomain scaDomain = (SCADomain)servletContext.getAttribute(SCA_DOMAIN_ATTRIBUTE);
       
        String domainURI = "http://localhost/" + servletContext.getServletContextName().replace(' ', '.');
        String contributionRoot = null;
       
        try {
            URL rootURL = servletContext.getResource("/");
            if (rootURL.getProtocol().equals("jndi")) {
                //this is tomcat case, we should use getRealPath
                File warRootFile = new File(servletContext.getRealPath("/"));
                contributionRoot = warRootFile.toURL().toString();
            } else {
                //this is jetty case
                contributionRoot  = rootURL.toString();
            }
        } catch(MalformedURLException mf) {
            //ignore, pass null
        }
               
       
        if (scaDomain == null) {
            scaDomain = SCADomain.newInstance(domainURI, contributionRoot);
            servletContext.setAttribute(SCA_DOMAIN_ATTRIBUTE, scaDomain);
        }
        return scaDomain;
    }
}
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