[sr-dev] [SR-Users] Update existing module or create new?

[Charles Chance]

Hi Devs,

On 05/02/2013 12:25, Henning Westerholt wrote:
> Am Dienstag, 5. Februar 2013, 12:52:19 schrieb Charles Chance:
>> We are working on a memcached module which uses the libmemcached library, as
>> opposed to the (no longer under active development) libmemcache that the
>> existing module depends on.
>>
>> Am I correct in thinking that in this instance, it would be better to create
>> a brand new module (with a different name) rather than modify the existing
>> one? In addition to changing the dependency, we will also be exporting new
>> commands and potentially changing the format of the exported PVs.
> Hello Charles,
>
> as the original author of the module I'd think that changing or replacing the
> existing module would be the way to go. So far I'd not recieved that much of
> bug reports against the existing module. And as Alex Balashov also mentioned
> recently, there are some other issues with the current library.
>
> If existing users need to stay with the old module, its available in the git
> and the existing releases, for the new release we should go with a module
> which supports the newer library.
>
> It would be nice if you could stay with the existing PV API, which I modelled
> somehow after the htable module. If you need to change something, just
> announce it on the devel list and ask for feedback.
>
> Thanks and regards,
>
> Henning Westerholt

Very happy to stay with existing PVs if possible. The only thing I'd 
like to see different is to set value and expiry at the same time, 
instead of having to set value, then alter expiration. This has to be 
better than setting a value with some default expiry, getting that same 
value back again, then re-setting the value once more with a different 
expiry?

Could this be implemented at PV level? Something like $mct(key:expiry) = 
value? And if expiry is omitted, we use default.

Regards,

Charles

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