krl servlets & concurrency

["62945" <62945 at bol dot com dot br>]

Examining the krl translation (kawa --servlet --krl -C
vs.scm) of

[ (define x 1)
  (set! x (+ x 1)) ]

[x]

we_see_(with_a_jode_disassemby/thanks_to_Chris_Dean):------------------------

   ... more

public class vs extends KawaServlet
{
    public final Symbol x
	= gnu.mapping.Environment.getCurrent().getSymbol("x");
    static final UnescapedData Lit0;
    static final IntNum Lit1;
    static final UnescapedData Lit2;

    public int numArgs() {
	return 0;
    }

    public final void apply(CallContext $ctx) {
	Consumer $result = $ctx.consumer;
	$result.writeObject(Lit0);
	x.set(Lit1);
	$result.writeObject(Lit2);
	x.set(AddOp.$Pl.apply2(Lit1,
Interpreter.getSymbolValue(x)));
	$result.writeObject(Lit2);
	Object object = Interpreter.getSymbolValue(x);
	Consumer consumer = $result;
	consumer.writeObject(object);
	$result.writeObject(Lit0);
    }

    ... more

----------------------------------------------------------------------

"x" gets translated to a class var. As I have expressed
my concern this code looks unsafe for concurrency. An
equivalent jsp code:

<% int x = 1;
   x++;       %>

<%= x %>

gives:----------------------------------------------------------------

  ... more

  public void _jspService(HttpServletRequest request,
HttpServletResponse response)
        throws java.io.IOException, ServletException {

    JspFactory _jspxFactory = null;
    PageContext pageContext = null;
    HttpSession session = null;
    ServletContext application = null;
    ServletConfig config = null;
    JspWriter out = null;
    Object page = this;
    JspWriter _jspx_out = null;
    PageContext _jspx_page_context = null;


    try {
      _jspxFactory = JspFactory.getDefaultFactory();
      response.setContentType("text/html");
      pageContext = _jspxFactory.getPageContext(this,
request, response,
      			null, true, 8192, true);
      _jspx_page_context = pageContext;
      application = pageContext.getServletContext();
      config = pageContext.getServletConfig();
      session = pageContext.getSession();
      out = pageContext.getOut();
      _jspx_out = out;

      out.write('\n');

   int x = 1;
   x++;

      out.write('\n');
      out.write('\n');
      out.print( x );
      out.write('\n');

 ... more

----------------------------------------------------------------------

the jsp translation puts "x" inside the "_jspService"
method and it looks safe. Please instruct me if I'm
wrong, but shouldn't (or couldn't) "x" in the kawa
translation be placed inside "apply".

 
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