content: /*
   * Copyright (c) 2001-2004 Caucho Technology, Inc.  All rights reserved.
   *
   * The Apache Software License, Version 1.1
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. The end-user documentation included with the redistribution, if
   *    any, must include the following acknowlegement:
   *       "This product includes software developed by the
   *        Caucho Technology (http://www.caucho.com/)."
   *    Alternately, this acknowlegement may appear in the software itself,
   *    if and wherever such third-party acknowlegements normally appear.
   *
   * 4. The names "Burlap", "Resin", and "Caucho" must not be used to
   *    endorse or promote products derived from this software without prior
   *    written permission. For written permission, please contact
   *    info@caucho.com.
   *
   * 5. Products derived from this software may not be called "Resin"
   *    nor may "Resin" appear in their names without prior written
   *    permission of Caucho Technology.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED.  IN NO EVENT SHALL CAUCHO TECHNOLOGY OR ITS CONTRIBUTORS
   * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
   * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
   * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
   * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
   * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
   * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
   * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   * @author Scott Ferguson
   */
  
  package com.caucho.burlap.server;
  
  import com.caucho.burlap.io.BurlapInput;
  import com.caucho.burlap.io.BurlapOutput;
  import com.caucho.services.server.Service;
  import com.caucho.services.server.ServiceContext;
  
  import javax.servlet.*;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.OutputStream;
  import java.io.PrintWriter;
  
  /**
   * Servlet for serving Burlap services.
   */
  public class BurlapServlet extends GenericServlet {
    private Class<?> _apiClass;
    private Object _service;
    
    private BurlapSkeleton _skeleton;
  
    public String getServletInfo()
    {
      return "Burlap Servlet";
    }
  
    /**
     * Sets the service class.
     */
    public void setService(Object service)
    {
      _service = service;
    }
  
    /**
     * Sets the api-class.
     */
    public void setAPIClass(Class<?> apiClass)
    {
      _apiClass = apiClass;
    }
  
    /**
     * Initialize the service, including the service object.
     */
    public void init(ServletConfig config)
      throws ServletException
    {
      super.init(config);
      
      try {
        if (_service == null) {
          String className = getInitParameter("service-class");
          Class<?> serviceClass = null;
  
          if (className != null) {
            ClassLoader loader = Thread.currentThread().getContextClassLoader();
  
            if (loader != null)
              serviceClass = Class.forName(className, false, loader);
            else
              serviceClass = Class.forName(className);
          }
          else {
            if (getClass().equals(BurlapServlet.class))
              throw new ServletException("server must extend BurlapServlet");
  
            serviceClass = getClass();
          }
  
          _service = serviceClass.newInstance();
  
          if (_service instanceof BurlapServlet)
            ((BurlapServlet) _service).setService(this);
          if (_service instanceof Service)
            ((Service) _service).init(getServletConfig());
          else if (_service instanceof Servlet)
            ((Servlet) _service).init(getServletConfig());
        }
        
        if (_apiClass == null) {
          String className = getInitParameter("api-class");
  
          if (className != null) {
            ClassLoader loader = Thread.currentThread().getContextClassLoader();
  
            if (loader != null)
              _apiClass = Class.forName(className, false, loader);
            else
              _apiClass = Class.forName(className);
          }
          else
            _apiClass = _service.getClass();
        }
  
        _skeleton = new BurlapSkeleton(_service, _apiClass);
      } catch (ServletException e) {
        throw e;
      } catch (Exception e) {
        throw new ServletException(e);
      }
    }
    
    /**
     * Execute a request.  The path-info of the request selects the bean.
     * Once the bean's selected, it will be applied.
     */
    public void service(ServletRequest request, ServletResponse response)
      throws IOException, ServletException
    {
      HttpServletRequest req = (HttpServletRequest) request;
      HttpServletResponse res = (HttpServletResponse) response;
  
      if (! req.getMethod().equals("POST")) {
        res.setStatus(500, "Burlap Requires POST");
        PrintWriter out = res.getWriter();
  
        res.setContentType("text/html");
        out.println("<h1>Burlap Requires POST</h1>");
        
        return;
      }
  
      String serviceId = req.getPathInfo();
      String objectId = req.getParameter("id");
      if (objectId == null)
        objectId = req.getParameter("ejbid");
  
      ServiceContext.begin(req, res, serviceId, objectId);
  
      try {
        InputStream is = request.getInputStream();
        OutputStream os = response.getOutputStream();
  
        BurlapInput in = new BurlapInput(is);
        BurlapOutput out = new BurlapOutput(os);
  
        _skeleton.invoke(in, out);
      } catch (RuntimeException e) {
        throw e;
      } catch (ServletException e) {
        throw e;
      } catch (Throwable e) {
        throw new ServletException(e);
      } finally {
        ServiceContext.end();
      }
    }
  }
  