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POHow to get Clojure exception notification when they happen on the EDT?
 

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  1. POHow to get Clojure exception notification when they happen on the EDT?
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    <p>I've just been scratching my hairs for a long time with an error I couldn't find. It turned out to be an arity exception but apparently because it happened on the EDT I couldn't "see" it. It didn't show in the "lein run" terminal when run from a terminal and it didn't show in any Emacs buffer when run from Emacs.</p> <p>After a very long time I ended up doing this:</p> <pre><code>(try (function-call-with-arity-error ...) (catch Exception e (println e) </code></pre> <p>and, at last, thanks to this, I got to see this printed:</p> <pre><code>#&lt;ArityException clojure.lang.ArityException: wrong number of args passed to... </code></pre> <p>and hence I've been able to find my error.</p> <p>And if I do this:</p> <pre><code>(do (println "trying...") (arity-error-here-on-purpose) ; this ones throws the arity error (println "done") ) </code></pre> <p>Then the terminal prints <em>"trying..."</em> but never gets to <em>"done..."</em>.</p> <p>I tried setting a default uncaught exception handler: the exception isn't getting caught. It's as if the program or the EDT was "stuck" after the arity exception (without printing anything anywhere).</p> <p>How am I suppose to deal with this the next time? Because I couldn't see any message anywhere it took me a really long time to find. Once again: nothing in the 'lein run' terminal and nothing in any Emacs buffer.</p> <p>Should I create a function that wraps calls that should happen on the EDT inside try / catch manually and that then logs/println the exception?</p> <p>Also note that this is in a relatively "long" Clojure app: 1000 lines of code, so I can't paste it here and I couldn't reproduce that behavior in a short example (but it happens consistently in my app).</p>
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    1. USCedric Martin
    1. USCedric Martin
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      1. POHow to get Clojure exception notification when they happen on the EDT?
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    1. COThis might be helpful: http://stackoverflow.com/questions/4448523/how-can-i-catch-event-dispatch-thread-edt-exceptions
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