1:28 a.m.
I have a dumb question about new error handling. What is the rationale
for using
'libvirt_message' instead of 'message' in new Libvirt Ruby error
classes?
Here is an example of code I am writing:
rescue SystemCallError
process($!.message)
...
rescue Libvirt::Error
process($!.libvirt_message)
...
instead of, shorter:
rescue Libvirt::Error, SystemCallError
process($!.message)
...
In reality, my rescue classes are bit longer, so the code gets hairy.
Wouldn't it be better to use standard 'message' attribute instead?
Sincerely,
Vadim
--
"La perfection est atteinte non quand il ne reste rien a ajouter, mais
quand il ne reste rien a enlever." (Antoine de Saint-Exupery)
12:15 p.m.
On Thu, 2008-04-10 at 23:28 -0700, Vadim Zaliva wrote:
I have a dumb question about new error handling. What is the
rationale
for using
'libvirt_message' instead of 'message' in new Libvirt Ruby error
classes?
The 'message' in the exception is set, too, usually to the name of the
libvirt function that returned the error. libvirt_message stores
additional error details from virError, which is not always available.
That's how it works at the moment, but I am open to suggestions to
change that.
David
10:13 p.m.
On Apr 11, 2008, at 10:15, David Lutterkort wrote:
The 'message' in the exception is set, too, usually to the
name of the
libvirt function that returned the error. libvirt_message stores
additional error details from virError, which is not always available.
That's how it works at the moment, but I am open to suggestions to
change that.
I guess my main complaint is that in some cases message is not a
coherent English phrase, something I can show to users. So I would
prefer to have "Error during call to XXX" instead of just "XXX".
Vadim
--
"La perfection est atteinte non quand il ne reste rien a ajouter, mais
quand il ne reste rien a enlever." (Antoine de Saint-Exupery)
3:15 a.m.
On Sun, Apr 13, 2008 at 08:13:51PM -0700, Vadim Zaliva wrote:
I guess my main complaint is that in some cases message is not a
coherent
English phrase, something I can show to users. So I would prefer to have
"Error during call to XXX" instead of just "XXX".
[Not a direct answer about the Ruby bindings, but ...]
virterror is a confusing and over-engineered bit of code. It would
have been better just to raise string errors (as in Perl).
But anyway if you can call __virErrorMsg then you should be able to
translate the message into something (a) readable and (b) translated.
eg. Code in libvirt which does this:
qemudReportError (dom->conn, dom, NULL, VIR_ERR_NO_SUPPORT,
"%s", __FUNCTION__);
should be translated like this in __virErrorMsg (note '_' which means
it gets translated):
_("this function is not supported by the hypervisor: %s")
Rich.
--
Richard Jones, Emerging Technologies, Red Hat http://et.redhat.com/~rjones
virt-top is 'top' for virtual machines. Tiny program with many
powerful monitoring features, net stats, disk stats, logging, etc.
http://et.redhat.com/~rjones/virt-top
3:11 p.m.
On Sun, 2008-04-13 at 20:13 -0700, Vadim Zaliva wrote:
I guess my main complaint is that in some cases message is not a
coherent English phrase, something I can show to users. So I would
prefer to have "Error during call to XXX" instead of just "XXX".
I just committed a change so that the message of the exception is set to
such a message.
David
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4 comments
3 participants
participants (3)
-
David Lutterkort -
Richard W.M. Jones -
Vadim Zaliva