Hi Atamert,
I realised too the discouraged note 
<https://github.com/stuartsierra/component#disadvantages-of-the-component-model>
 
about cyclic dependencies but although your closed "parent->child" 
component relations is logically perfect on start your system, when system 
"is ready to work"  it's very useful to open the door to "child->parent" 
relation too, so the "child" component can communicate with "parent" 
component. 
Here a couple of examples that you could find this reverse relation: 
* routing (router and webservices). webservice could need to know which 
other webservices are connected to its "parent" router to construct urls (
modular/bidi <https://github.com/juxt/modular/tree/master/modules/bidi>)
* templating (menu and menu-items). Menu-items could need to know which 
others menu-items are used/displayed on the menu component to adapt their 
renderer

Does this explanation make sense to you?

Thanks for reviewing 
Juan

El martes, 2 de diciembre de 2014 12:55:42 UTC+1, Atamert Ölçgen escribió:
>
> Hi Juan,
>
> I thought co-dependencies ought to be designed out. Could you give a use 
> case for co-dependency?
>
>
> On Tue, Dec 2, 2014 at 7:16 PM, JUAN ANTONIO Ruz <juanant...@gmail.com 
> <javascript:>> wrote:
>
>> *co-dependency* is a library that lets you use "*cyclic*" dependencies in 
>> stuartsierra/component systems
>>
>> In other words, :a depends-on :b, :b (co-)depends-on :a
>>
>> Although I used "cyclic" word, this co-dependency library is designed on 
>> the idea that components don't need co-dependencies to start as normal 
>> dependencies.
>>
>> co-dependency follows the pattern described in 
>> stuartsierra/component#customization 
>> <https://github.com/stuartsierra/component#customization> to accomplish 
>> this "cyclic" feature
>>
>> You can find all the details about this lib on 
>> https://github.com/tangrammer/co-dependency
>>
>>
>>  -- 
>> You received this message because you are subscribed to the Google
>> Groups "Clojure" group.
>> To post to this group, send email to clo...@googlegroups.com 
>> <javascript:>
>> Note that posts from new members are moderated - please be patient with 
>> your first post.
>> To unsubscribe from this group, send email to
>> clojure+u...@googlegroups.com <javascript:>
>> For more options, visit this group at
>> http://groups.google.com/group/clojure?hl=en
>> --- 
>> You received this message because you are subscribed to the Google Groups 
>> "Clojure" group.
>> To unsubscribe from this group and stop receiving emails from it, send an 
>> email to clojure+u...@googlegroups.com <javascript:>.
>> For more options, visit https://groups.google.com/d/optout.
>>
>
>
>
> -- 
> Kind Regards,
> Atamert Ölçgen
>
> -+-
> --+
> +++
>
> www.muhuk.com
>  

-- 
You received this message because you are subscribed to the Google
Groups "Clojure" group.
To post to this group, send email to clojure@googlegroups.com
Note that posts from new members are moderated - please be patient with your 
first post.
To unsubscribe from this group, send email to
clojure+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/clojure?hl=en
--- 
You received this message because you are subscribed to the Google Groups 
"Clojure" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to clojure+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

Reply via email to