From: Peter Vandenabeele <peter@...>
Date: 2012-01-13T06:33:45+09:00
Subject: Re: Problem with "Exception" - suddenly stopped working

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On Thu, Jan 12, 2012 at 10:04 PM, Abinoam Jr. <abinoam@gmail.com> wrote:

> IMHO ~PERHAPS~ the begin rescue is not working because the exception
> is not being propagated or the process is being abruptly terminated
> (without raising exceptions). (Note: no experience with this gem)
>
> Let's see if somebody else more experienced knows the answer.
>
> Meantime, look at this code as an example.
>
> http://codepad.org/f4g9BIEa
>
> Abinoam Jr.
>

Hi Abinoam, it is easier to follow the thread if you would write your reply
on the
bottom (ref. "no top quoting").

I continue below.


> On Thu, Jan 12, 2012 at 2:01 PM, Panagiotis Atmatzidis
> <ml@convalesco.org> wrote:
> > Hello,
> >
> > I'm having a hard time with an exception handling. It's part of a simple
> ruby script which fetches user's tweets and dumps into an SQLite3 database.
> >
> > The code and the error can be found here:
> http://codepad.org/WQN2cYfi#comment-5lrGPpKo
> >
> > The strange thing is that it was working fine and suddenly stopped. I
> can't recall making an changes related to this code snippet which could
> affect it's behavior.
> >
> > Any help/thoughts would be welcome,
>

It looks like the actual "exception" (I quote it because I am not sure
_what_ it is),
is called:

  Twitter::Error::BadGateway

Very speculative ... could you ask it's ancestor tree?

 Twitter::Error::BadGateway.class

Like this:

peterv@ASUS:~$ irb
001:0> Exception.ancestors
=> [Exception, Object, Kernel, BasicObject]
002:0> RuntimeError
=> RuntimeError
003:0> RuntimeError.ancestors
=> [RuntimeError, StandardError, Exception, Object, Kernel, BasicObject]
004:0> RuntimeError.new.kind_of?(Exception)
=> true
005:0> RUBY_VERSION
=> "1.9.3"

Maybe (??) it does not inherit from Exception (the actual class) ??

Very speculative ...

I believe an exception will only be trapped by the `rescue Something`
if the "exception.is_a?(Something)"

HTH (but not sure),

Peter

-- 
Peter Vandenabeele
http://twitter.com/peter_v
http://rails.vandenabeele.com

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