noir.session clojure.lang.Var$Unbound cannot be cast to java.util.concurrent.Future

[Sven Richter]

Hi,

I have an error message that I just dont understand. This is what I am trying to do:

(ns service)
(defn get-id [] (session/get :id))

(ns http)
(defn get-it [] (parse-string (:body (client/get
                                      (str
                                        base-url
                                        "rest/api/2/search?jql=issuetype=Epos&status!=closed&maxResults=1000&JSESSIONID="
                                        (service/get-id))          ;this is there the error occurs
                                   :accept :json}))))

Now, when I startup ring I get the following error:

Exception in thread "main" java.lang.ClassCastException: clojure.lang.Var$Unbound cannot be cast to java.util.concurrent.Future
        at clojure.core$deref_future.invoke(core.clj:2108)
        at clojure.core$deref.invoke(core.clj:2129)
        at noir.session$get.invoke(session.clj:24)
        at lweb.services.jira$get_jira_session_id.invoke(jira.clj:17)
        at lweb.services.epic$get_epics.invoke(epic.clj:19)
        at lweb.services.epic$get_epic_sp_map.invoke(epic.clj:40)
        at lweb.services.epic$eval10850.invoke(epic.clj:43)
        at clojure.lang.Compiler.eval(Compiler.java:6619)
        at clojure.lang.Compiler.load(Compiler.java:7064)
        at clojure.lang.RT.loadResourceScript(RT.java:370)
        at clojure.lang.RT.loadResourceScript(RT.java:361)
        at clojure.lang.RT.load(RT.java:440)
        at clojure.lang.RT.load(RT.java:411)
        at clojure.core$load$fn__5018.invoke(core.clj:5530)
        at clojure.core$load.doInvoke(core.clj:5529)
        at clojure.lang.RestFn.invoke(RestFn.java:408)
        at clojure.core$load_one.invoke(core.clj:5336)
        at clojure.core$load_lib$fn__4967.invoke(core.clj:5375)
        at clojure.core$load_lib.doInvoke(core.clj:5374)
        at clojure.lang.RestFn.applyTo(RestFn.java:142)
        at clojure.core$apply.invoke(core.clj:619)
        at clojure.core$load_libs.doInvoke(core.clj:5413)
        at clojure.lang.RestFn.applyTo(RestFn.java:137)
        at clojure.core$apply.invoke(core.clj:619)
        at clojure.core$require.doInvoke(core.clj:5496)
        at clojure.lang.RestFn.invoke(RestFn.java:703)
        at lweb.routes.epics$eval8170$loading__4910__auto____8171.invoke(epics.clj:1)
        at lweb.routes.epics$eval8170.invoke(epics.clj:1)
        at clojure.lang.Compiler.eval(Compiler.java:6619)
        at clojure.lang.Compiler.eval(Compiler.java:6608)
        at clojure.lang.Compiler.load(Compiler.java:7064)
        at clojure.lang.RT.loadResourceScript(RT.java:370)
        at clojure.lang.RT.loadResourceScript(RT.java:361)
        at clojure.lang.RT.load(RT.java:440)
        at clojure.lang.RT.load(RT.java:411)
        at clojure.core$load$fn__5018.invoke(core.clj:5530)
        at clojure.core$load.doInvoke(core.clj:5529)
        at clojure.lang.RestFn.invoke(RestFn.java:408)
        at clojure.core$load_one.invoke(core.clj:5336)
        at clojure.core$load_lib$fn__4967.invoke(core.clj:5375)
        at clojure.core$load_lib.doInvoke(core.clj:5374)
        at clojure.lang.RestFn.applyTo(RestFn.java:142)
        at clojure.core$apply.invoke(core.clj:619)
        at clojure.core$load_libs.doInvoke(core.clj:5413)
        at clojure.lang.RestFn.applyTo(RestFn.java:137)
        at clojure.core$apply.invoke(core.clj:619)
        at clojure.core$require.doInvoke(core.clj:5496)
        at clojure.lang.RestFn.invoke(RestFn.java:1523)
        at lweb.handler$eval4449$loading__4910__auto____4450.invoke(handler.clj:1)
        at lweb.handler$eval4449.invoke(handler.clj:1)
        at clojure.lang.Compiler.eval(Compiler.java:6619)
        at clojure.lang.Compiler.eval(Compiler.java:6608)
        at clojure.lang.Compiler.load(Compiler.java:7064)
        at clojure.lang.RT.loadResourceScript(RT.java:370)
        at clojure.lang.RT.loadResourceScript(RT.java:361)
        at clojure.lang.RT.load(RT.java:440)
        at clojure.lang.RT.load(RT.java:411)
        at clojure.core$load$fn__5018.invoke(core.clj:5530)
        at clojure.core$load.doInvoke(core.clj:5529)
        at clojure.lang.RestFn.invoke(RestFn.java:408)
        at clojure.core$load_one.invoke(core.clj:5336)
        at clojure.core$load_lib$fn__4967.invoke(core.clj:5375)
        at clojure.core$load_lib.doInvoke(core.clj:5374)
        at clojure.lang.RestFn.applyTo(RestFn.java:142)
        at clojure.core$apply.invoke(core.clj:619)
        at clojure.core$load_libs.doInvoke(core.clj:5413)
        at clojure.lang.RestFn.applyTo(RestFn.java:137)
        at clojure.core$apply.invoke(core.clj:619)
        at clojure.core$require.doInvoke(core.clj:5496)
        at clojure.lang.RestFn.invoke(RestFn.java:457)
        at lweb.core$eval4443$loading__4910__auto____4444.invoke(core.clj:1)
        at lweb.core$eval4443.invoke(core.clj:1)
...
Can someone explain please what is happening here and how to do it right?

Thanks,
Sven

[Sean Corfield]

Looks like the Noir session isn't initialized. Have you added the wrap-noir-session middleware?

Sean

[Sven Richter]

Hi Sean,

I am using a luminusweb project. So yes, noir.session gets initialized and is working. I was testing that before to get a feeling for noir.session at all.
So could this be a timing issue? Trying to access the session before it is initialized?

Thanks,
Sven

[Sven Richter]

I think I tracked the problem down. In my handler I define my routes, which calls enlive/deftemplate, which is a macro. 

Now, if I understand this right, the macro will be called at compile time, when noir.session is not available yet. Is that right?

How can I get around this?

[Sven Richter]

Hm,

Searching some more I found this blog post: http://yogthos.net/blog/46-what's+new+in+lib-noir which shows the exact same problem I guess I have.

However, using luminus I dont have much options and everything should be setup correct already.

This is how my handler looks like:

(def secured-routes

  [(friend/authenticate user-routes user/friend-settings)

   (friend/authenticate epics-routes user/friend-settings)

   (friend/authenticate jira-routes user/friend-settings)

   home-routes app-routes])

(def app

  (app-handler

           ;; add your application routes here

           secured-routes

           ;; add custom middleware here

           :middleware [middleware/template-error-page

                        ;middleware/log-request

                        ]

           ;; add access rules here

           :access-rules []

           ;; serialize/deserialize the following data formats

           ;; available formats:

           ;; :json :json-kw :yaml :yaml-kw :edn :yaml-in-html

           :formats [:json-kw :edn]))

I also tried this suggestion: https://groups.google.com/forum/#!topic/enlive-clj/0WOG2CDqUDY

But it did not help neither -.-

Any Ideas?

[Sven Richter]

Ok, I had a call to (session/get :key) during initialization of my application in a def statenemt. Thats what caused the call to before session dynamic variable is initialized.

Thanks,
Sven