Catching exceptions

[Aaron Bedra]

Where would I hook into to have a catch all exception handler? I would like to make sure that all unexpected exceptions are logged properly.

Cheers,

Aaron

[James Reeves]

On Jan 5, 3:32 pm, Aaron Bedra <aaron.be...@gmail.com> wrote:
> Where would I hook into to have a catch all exception handler?  I would like to make sure that all unexpected exceptions are logged properly.

You'd want some middleware like this:

(defn with-error-catching [handler]
(fn [request]
(try
(handler request)
(catch Exception e ;; handle the exception
...))))

And then you'd use the decorate macro to add it onto your routes:

(decorate your-routes with-error-catching)

- James

[Aaron Bedra]

Thanks!

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[Aaron Bedra]

The solution ends up looking something like this:

(defn error-handling

[handler]
(fn [request]
(try
(handler request)
(catch Exception e

(if (= "development" environment)
(handler request)
(do
(log :error e)
[500 "Application Error"]))))))

I have setup environments so that production doesn't produce a stack trace straight to the browser but development will.

Cheers,

Aaron

On Jan 5, 2010, at 5:05 PM, James Reeves wrote:

[Wei Hsu]

I just implemented similar error-handling recently and am having trouble getting it to work.

Made a reference app to demonstrate the issue: https://github.com/yayitswei/exceptiontest What am I doing wrong here?