From: Phil Eaton <phil@eatonphil.com>
To: kawa mailing list <kawa@sourceware.org>
Subject: Receiver class does not define or inherit an implementation of the resolved method
Date: Sun, 29 Aug 2021 15:03:48 -0400 [thread overview]
Message-ID: <CAByiw+pqdbJ_DgRMncZ4FzFN273ctBFeZrFAJaEvKSPqvfTP5g@mail.gmail.com> (raw)
Hey folks!
Still new to Kawa. I'm trying to implement an interface (
io.jooby.Route$Handler
<https://github.com/jooby-project/jooby/blob/2.x/jooby/src/main/java/io/jooby/Route.java#L247>).
It only has a single non-default method, apply.
Here's what I've got
(define (route app method path handler)
(let ((handler (object (io.jooby.Route$Handler)
#| This method exists just to stop Jooby from
trying to introspect Java code that doesn't exist because this isn't
written in Java. |#
((apply (ctx ::io.jooby.Context)) ::string
#!null)
((apply (ctx ::io.jooby.Context))
::java.lang.Object
(handler ctx)))))
(app:route method path handler)))
But when this gets exercised, I get:
[worker-1-3] ERROR io.jooby.Jooby - GET /hello-world 500 Server Error
java.lang.AbstractMethodError: Receiver class main$0 does not define or
inherit an implementation of the resolved method 'abstract java.lang.Object
apply(io.jooby.Context)' of interface io.jooby.Route$Handler.
at
io.jooby.internal.handler.SendCharSequence.apply(SendCharSequence.java:22)
at
io.jooby.internal.handler.WorkerHandler.lambda$apply$0(WorkerHandler.java:23)
at
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
at
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
at
io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
at java.base/java.lang.Thread.run(Thread.java:831)
Also on a tangent, I was excited about the lambda shorthand for single
method objects. Like I said this interface only has a single non-default
method: apply. But I tried just calling `(app:route method handler)`
without wrapping it in the io.jooby.Route$Handler object but it still
failed. I guess it couldn't figure out this one method.
Or I'm doing everything wrong.
The full code is available here
<https://github.com/eatonphil/jvm-lisp-examples/tree/main/kawa> and can be
run just by calling make. The exception happens when you `curl
localhost:8080/`.
Any ideas about what I'm doing wrong?
Thanks!
Phil
next reply other threads:[~2021-08-29 19:04 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-29 19:03 Phil Eaton [this message]
2021-08-30 16:40 ` Per Bothner
2021-08-30 23:09 ` Phil Eaton
2021-08-30 23:18 ` Phil Eaton
2021-09-07 10:59 ` spellcard199
2021-09-07 13:02 ` Phil Eaton
2021-09-07 17:58 ` spellcard199
2021-09-07 19:35 ` Phil Eaton
2021-09-08 14:14 ` spellcard199
2021-09-08 14:20 ` spellcard199
2021-09-07 19:31 ` Per Bothner
2021-09-07 19:45 ` Phil Eaton
2021-09-07 20:13 ` Per Bothner
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