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Hello guys.
This is my first post on the list, and beg your forgiveness if this
question was already answered, but alas, my search-fu was incapable
of finding anything that could have helped me.
Here is my situation:
I am trying to build a servlet using ABCL. The servlet is a middleware
that will expose an API, consume JSON, and return JSON. I will also
store some data into a postgres RDBMS.
I've used the google-app-engine example as a basis to build a skeleton
of my app, with a Java class providing a proxy for the servlet. If I
don't use any dependencies on my project, everything runs ok. My
problem is that I have the following system descriptor:
(asdf:defsystem #:abcl-servlet
:serial t
:description "An example of a servlet using the ABCL stack."
:author "Eduardo Bellani <ebellani(a)gmail.com>"
:license "Beerware v. 42"
:depends-on (:jsown
:postmodern)
:components ((:module :src
:components ((:file "package")
(:file "servlet-interface")))))
As you can see, I have some dependencies on my code. Dependencies
which I must load before my packages can run. I'm wondering how I can
load this dependencies without explicitly coding the load
calls. FWIWI, the java proxy class is here:
public class ServletProxy extends HttpServlet {
static private Symbol doGet = null;
static private Symbol doPost = null;
static private Symbol doDestroy = null;
static private Object lock = new Object();
static private boolean initialized = false;
private static void doWithStreamsBound(Symbol whatToDo,
HttpServletRequest req,
HttpServletResponse resp)
throws IOException {
LispThread currentThread = LispThread.currentThread();
SpecialBindingsMark mark = currentThread.markSpecialBindings();
currentThread.bindSpecial(Symbol.STANDARD_OUTPUT,
new Stream(Symbol.SYSTEM_STREAM,
resp.getOutputStream(),
Symbol.CHARACTER, false));
currentThread.bindSpecial(Symbol.STANDARD_INPUT,
new Stream(Symbol.SYSTEM_STREAM,
resp.getInputStream(),
Symbol.CHARACTER, false));
try {
currentThread.execute(whatToDo);
} finally {
currentThread.resetSpecialBindings(mark);
}
}
/**
* Initialize the lisp interpreter that the symbols that will be
* called on the lisp servlet interface. Not surprisingly, these
* symbols mirror the HttpServlet interface. This is a result of
* this class being only a proxy for the internal lisp system.
*/
public void init(ServletConfig config) throws ServletException {
// No need for any external usage of theInit
Symbol theInit = null;
Interpreter.initializeLisp();
Load.load(config.getServletContext().getRealPath("fasls/first-servlet.abcl"));
LispThread.currentThread();
doGet = Lisp.internInPackage("DO-GET", "SERVLET-INTERFACE");
doPost = Lisp.internInPackage("DO-POST", "SERVLET-INTERFACE");
theInit = Lisp.internInPackage("INIT", "SERVLET-INTERFACE");
theDestroy = Lisp.internInPackage("DESTROY", "SERVLET-INTERFACE");
}
public void doGet(HttpServletRequest req, HttpServletResponse resp)
throws IOException {
ServletProxy.doWithStreamsBound(doGet, req, resp);
}
}
I'm planning to write down a tutorial that covers building a web app
in ABCL from scratch up to a running servlet that touches a DB and
returns JSON, so I want to know the best way to do those things.
Thanks for the attention, and please let me know if you guys have any
questions or pointers.
See you.
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[r14716][] contains asdf-3.1.3, which should not be functionally different from the previous asdf-3.1.2.9
[r14716]: http://abcl.org/trac/changeset/14716
--
"A screaming comes across the sky. It has happened before but there is nothing
to compare to it now."
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