Re: [Qexo-general] useful servlet

[Per Bothner]

Tom Reilly wrote:
> Useful servlet for automating the compilation process with a simple caching 
> mechanism
> (so the page isn't compiled everytime).   Makes .xql, .scm files work simliar 
> to jsp.

I didn't work for me.  I'm using Tomcat 4.0.  When I try:
http://localhost:8080/qexo2/test.xql
I get:

A Servlet Exception Has Occurred

java.lang.NullPointerException
        at gnu.kawa.servlet.KawaPageServlet.doGet(KawaPageServlet.java:68)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
	at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Unknown 
Source)
etc

I added a log command (line 68 is the rd.forward call):
        RequestDispatcher rd = context.getNamedDispatcher(servletName);
	log("servlet-path: "+sp+" servletName: "+servletName+" rd: "+rd+" 
context: "+context);
        rd.forward(request, response);

The log file localhost_log.2003-01-28.txt contains:
2003-01-28 23:08:43 KawaPageServlet: servlet-path:
/test.xql servletName: test rd: null context: 
address@hidden
So the context.getNamedDispatcher is failing.  Tomcat is
finding the correct .xql file, because when I "mis-type" the
URL or add a syntax error to the .xql file I get reasonable
errors messages.

> I couldn't figure out how to make different language files work at the same time (ie 
> in the same VM).  After one invocation Kawa's internals seems hardwired to the first 
> language.  

Yes, there are probably a number of little places in Kawa that should
be fixed to make this work, starting with the static fields
Interpreter.defaultInterpreter and Environment.global.
--
        --Per Bothner
address@hidden   http://www.bothner.com/per/