Thanks both. James, that is what I was hoping. I guess I got a bit misled with the combination of his "Customers" example in the video, the "all or nothing" warnings and "I do not intend that application functions should receive the top-level system as an argument. Rather, functions are defined in terms of components. " (from the front page on github).
I guess we can just (:interesting-component system) once the system has started? (Without writing a single line of code though, I can see the temptation to make stateless consumers Components just for the ease of use :)). On 28 November 2014 at 15:00, James Reeves <ja...@booleanknot.com> wrote: > On 28 November 2014 at 10:28, Colin Yates <colin.ya...@gmail.com> wrote: >> >> Am I right in thinking that in order to use >> https://github.com/stuartsierra/component every consumer of a component must >> also be a component? > > > Nope. > >> >> For example, if I have a component DB and I want to use that DB in (defn >> blob-query [db criteria]...), do I pull the DB out of the system map and >> call it or am I expected to make a BlobQuery component which offers a >> (blob-query [criteria]) API? > > > You only need to make something a component if it has a lifecycle. If you > just want to use a database connection, pass the component as an argument to > a function. > > Look at it another way: do you need to keep blob-query around? Does it have > state? If not, then it doesn't need to be a component. > > - James > > -- > 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 a topic in the > Google Groups "Clojure" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/clojure/WC983q33Nes/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > clojure+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. -- 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.
