Re: SISCweb questions

Gerardo,

Nikita has already given an excellent reply, but I would like to add a
couple of items.

The (class-path-extension-append! '("WEB-INF/scm/")) expression does
not do what you would expect it to because the REPL currently runs
with the current-url of the tomcat process.

I could have the REPL start in the  servlet context path, but it may
be still inappropriate when not running in an exploded war. I'll take
a look.

As to require-extension not reloading code, you will find that  (load
(find-resource "examples/test.scm")) will do what you expect.

In general, the REPL-based vanilla edit-compile-run cycle can benefit
from tools such as Emacs+Quack or Eclipse+Schemeway.

With both, you can simply send procedure or module definitions from
the current buffer to the REPL via the TCP/IP socket -- independently
of the file location.  Of course, because the project needs to be
deployable, you would still want to want to load the appropriate files
from the  on-init-sexp section of the web.xml file. (See the SISCweb
examples.)

Also, restarting the appserver is generally unnecessary. As long as
there are no open REPLs, you can simply force a servlet context reload
(usually by touching the web.xml file). SISCweb will gracefully
reload.

I hope these indications are useful. Please feel free to post if you
encounter any other obstacle.
___
Alessandro

On Sun, Mar 9, 2008 at 12:07 PM, Gerardo Horvilleur <[email protected]> wrote:
> Hi,
>
>  I'm interested in using SISCweb for a project. Besides the
>  continuations style of web programming I'm also interested in being
>  able to prototype code and test it without having to restart Tomcat.
>  But I haven't been able to understand how I should do it.
>  When I use telnet to connect to the REPL I try to do something line this:
>
>  (class-path-extension-append! '("WEB-INF/scm/"))
>  (require-extension (lib examples/test))
>
>  And it responds:
>  Error: library examples/test not found
>
>  I discovered that it is appending "WEB-INF/scm/" to what my current
>  directory was when I started Tomcat, instead of using the webapp's
>  main directory. As a workaround I can do:
>
>  (class-path-extension-append!
>  '("file:/Users/mago/progs/apache-tomcat-6.0.14/webapps/pruebas/WEB-INF/scm/"))
>
>  And now, require-extension works.
>
>  But then I have another problem. This will work only the first time I
>  want to load the library and import the module. Afterwards, as SISC
>  knows it has already loaded that library and imported the module, I
>  can't load the file again to test the changes. How should I do this?
>
>  Thank you,
>
>  --
>  Gerardo Horvilleur
>  [email protected]
>  5813-0830
>
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