pandeiro
Unable to pass a function written in built.boot to :not-found
If my :not-found handler function is written in my build.boot file then I will get the below error:
java.lang.Thread.run Thread.java: 745
java.util.concurrent.ThreadPoolExecutor$Worker.run ThreadPoolExecutor.java: 617
java.util.concurrent.ThreadPoolExecutor.runWorker ThreadPoolExecutor.java: 1142
java.util.concurrent.FutureTask.run FutureTask.java: 266
...
clojure.core/binding-conveyor-fn/fn core.clj: 2027
boot.core/boot/fn core.clj: 1029
boot.core/run-tasks core.clj: 1019
pandeiro.boot-http/eval902/fn/fn/fn boot_http.clj: 112
clojure.core/deref core.clj: 2317
...
pandeiro.boot-http/eval902/fn/fn boot_http.clj: 77
boot.pod/eval-in* pod.clj: 471
...
org.projectodd.shimdandy.impl.ClojureRuntimeShimImpl.invoke ClojureRuntimeShimImpl.java: 102
org.projectodd.shimdandy.impl.ClojureRuntimeShimImpl.invoke ClojureRuntimeShimImpl.java: 109
...
boot.pod/eval-in* pod.clj: 468
clojure.core/eval core.clj: 3194
...
pandeiro.boot-http.impl/server impl.clj: 142
pandeiro.boot-http.impl/ring-handler impl.clj: 118
pandeiro.boot-http.impl/dir-handler impl.clj: 90
pandeiro.boot-http.impl/wrap-not-found impl.clj: 82
pandeiro.boot-http.util/resolve-sym util.clj: 4
clojure.core/symbol core.clj: 579
...
java.lang.NullPointerException:
clojure.lang.Compiler$CompilerException: java.lang.NullPointerException, compiling:(NO_SOURCE_FILE:0:0)
clojure.lang.ExceptionInfo: java.lang.NullPointerException, compiling:(NO_SOURCE_FILE:0:0)
file: "/tmp/boot.user7518152912469497163.clj"
line: 35
Here is my example task I am calling:
(defn not-found-handler
[req]
{:status 404
:headers {}
:body "Not found"})
(deftask start-server
[]
(comp
(serve :not-found 'not-found-handler)
(wait)))
Not quite sure what the cause of this error is. It must be something boot specific. If I move my handler into a clj file in my project, then it works correctly - no error thrown. Example:
(ns myns.core)
(defn not-found-handler
[req]
{:status 404
:headers {}
:body "Not found"})
;; build.boot
(require '[myns.core :as core])
(deftask start-server
[]
(comp
(serve :not-found 'core/not-found-handler)
(wait)))
The symbol needs to be fully qualified with its namespace included, and that var that it points to must be able to be resolved from a namespace loaded from the classpath (which, in boot, would include your :source-paths directories, but not build.boot). So this is a limitation of boot. (Maybe we need to spell this out in the README?)
I could've sworn I have passed a symbol declared in my build.boot to a task, but maybe I'm crazy. Though, boot-http executes in a pod, which is likely different than the scenario I am recalling.
I think it'd be helpful to have a note in the README.