Sorry for posting some clojure source code to demonstrate the situation.
explanations is below the source code.
-----------------------------------------------------------------------------------------
;; It will block here in request time but execute normally in main
(defn jwsgi-body [#^java.io.FileDescriptor input]
(io! (with-open [rdr (reader (java.io.FileInputStream. input))]
(reduce conj [] (line-seq rdr)))))
(defn run-jwsgi [app]
(fn [hashtable]
(jwsgi-resp (app (ring-req hashtable)))))
(defn jwsgi [hashtable]
(let [pure-map (zipmap (.keySet hashtable) (.values hashtable))
x (println "a")
data (jwsgi-body (pure-map "jwsgi.input"))
x (println "b")
body (json/generate-string {:body data})
pure-map (merge pure-map {"BODY" body "CONTENT_TYPE" "text/plain"
"CONTENT_LENGTH" (.length body) "SSL_CLIENT_CERT" nil "jwsgi.input" nil})]
((run-jwsgi app) pure-map)))
(defn -jwsgi [hashtable]
(try (jwsgi hashtable)
(catch java.lang.Throwable throwable
(.printStackTrace throwable))
(finally (println "Ready!"))))
;; main execute the logic normally
(defn -main [& args]
(println "Hello! Galahad is serving for you!")
(let [request (doto (new java.util.Hashtable)
(.put "jwsgi.input" (.getFD (java.io.FileInputStream.
"project.clj")))
(.put "REQUEST_METHOD" "GET")
(.put "SERVER_PORT" "8080")
(.put "PATH_INFO" "/recommend/question/user.json")
(.put "QUERY_STRING"
"data={%22ukey%22:%229x7vau%22,%22limit%22:20}")
(.put "HTTP_HOST" "localhost"))]
(println (vec (-jwsgi request)))))
-----------------------------------------------------------------------------------------
Two situations for us:
* situation A: jvm main method calling
* situation B: jwsgi request-response calling
I found that:
* the io operation in jwsgi-body function will blocked in situation B but
will execute normally in situation A
* Othe io logic in our business code, which I did not show, take the same
I am guessing it is due to pthread mutex, but after search the source code,
I did not found anything useful.
Regards,
Mingli
On Sun, Jan 13, 2013 at 12:42 PM, Roberto De Ioris <[email protected]> wrote:
>
> > Hi, folks!
> >
> > A question about java and jwsgi!
> >
> > Right now I can start the jvm correctly, but when I request on the jwsgi
> > method and the java code will retrieve other io resouces, and then the
> > execution blocked. But if the java code do not retrieve other io
> > resources,
> > the response is OK.
> >
> > I write same code for retrieving other io resouces in the main method, it
> > works. So I guess it is not a problem on jni calling.
> >
> > It seems that uwsgi disable the multi-threading functionality. While I
> > tried enable the *enable-threads* option for uwsgi, but still can not
> > work.
> >
> > Any advise?
> >
> >
>
> I am not sure to understand (it is a bit of time i do not look at jni),
> you mean that spawning java threads does not bring cpu back to the main
> thread ?
>
> Or you mean that spawning multiple threads (with --threads N) does not
> allow java requests to be served in parallel ?
>
>
> --
> Roberto De Ioris
> http://unbit.it
> _______________________________________________
> uWSGI mailing list
> [email protected]
> http://lists.unbit.it/cgi-bin/mailman/listinfo/uwsgi
>
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