src/java/org/ibex/xt/ShellServlet.java

   1 package org.ibex.xt;
   2
   3 import java.io.*;
   4 import java.net.*;
   5 import java.util.*;
   6 import java.util.regex.*;
   7 import javax.servlet.*;
   8 import javax.servlet.http.*;
   9
  10 import org.ibex.util.*;
  11 import org.ibex.util.Collections;
  12 import org.ibex.js.*;
  13
  14 import org.prevayler.*;
  15
  16
  17 public class ShellServlet extends HttpServlet {
  18     private ServletContext cx = null;
  19     private Prevayler prevayler;
  20     private JS prevalent;
  21
  22     // FIXME: destroy() counter with normal Servlet
  23     public void init(ServletConfig sc) throws ServletException {
  24         cx = sc.getServletContext();
  25         prevayler = Prevalence.getPrevayler(cx);
  26         prevalent = (JS)prevayler.prevalentSystem();
  27     }
  28
  29     public void doPost(HttpServletRequest rq, HttpServletResponse rs) throws IOException {
  30         Shell.Request r;
  31         try { r = (Shell.Request)new ObjectInputStream(rq.getInputStream()).readObject(); }
  32         catch (ClassNotFoundException e) {
  33             e.printStackTrace();
  34             throw new IOException("exception receiving request, class not found");
  35         }
  36
  37         JSScope scope = (JSScope)rq.getSession().getAttribute("scope");
  38         if (scope == null) {
  39             System.out.println("creating new scope");
  40             try {
  41                 scope = new JSScope(null);
  42                 scope.put("prevalent", prevalent);
  43             } catch (JSExn e) {
  44                 e.printStackTrace();
  45                 throw new IOException("unexpected JSExn");
  46             }
  47             rq.getSession().setAttribute("scope", scope);
  48         }
  49         Object ret;
  50         try { ret = r.process(scope); } catch (JSExn e) { ret = e; }
  51         new ObjectOutputStream(rs.getOutputStream()).writeObject(ret);
  52     }
  53 }