no problem, You happened to ask just after I had worked out how to do Supervision trees on my own so it was fresh in my head :-) Glad I could help.
On Wed, Jan 7, 2009 at 2:56 PM, Norman Barker <[email protected]>wrote: > Jeremy, > > thanks, that worked, I followed couch_log as an example but changed > the event manager I was subscribed to couch_db_update and added the > child spec as you suggested. > > I followed the blog at > > http://spawnlink.com/articles/an-introduction-to-gen_event-account-notifications/ > which helped me understand the code. > > Many thanks, > > Norman > > On Tue, Jan 6, 2009 at 6:07 PM, Jeremy Wall <[email protected]> wrote: > > Using the OTP principles you would modify the couch_server_sup.erl file > and > > add a child spec for your module similar to the child spec for the > couch_log > > module in there. > > > > I would recommend reading the OTP documentation on Supervisor trees and > > gen_event behaviours before doing so though. That way you will know what > > exactly it is that you are doing by adding them. Also it would be good to > > add you module to the module list in a custome app file. I'm not sure if > > there is someother hook for this in the code other than _external. > > > > On Tue, Jan 6, 2009 at 5:27 PM, Norman Barker <[email protected] > >wrote: > > > >> Hi, > >> > >> I have create an erlang module called couch_db_update_my_notifier > >> which is very similar to couch_db_update_notifier and just prints out > >> events as they are received to stdout. > >> > >> I try to register this module as an event handler as follows within the > >> module > >> > >> start_link(Exec) -> > >> io:format("***StartLink***"), > >> couch_event_sup:start_link(couch_db_update, > >> {couch_db_update_my_notifier, make_ref()}, Exec). > >> > >> which is how it is recommended in couch_event_sup.erl > >> > >> Problem is how do I actually load couch_db_update_my_notifier and get > >> start_link invoked, it isn't a daemon, just another listener, and the > >> updatenotification handler in the ini file is for system processes. > >> > >> Is there a way to do this (easily)? I am a newb at erlang and am > >> writing these modules to find my way around the code. Having multiple > >> listeners to events is something I will want to have eventually hence > >> why I am trying this. My aim is to do this in Erlang, I know it can > >> be done with _external. > >> > >> thanks, > >> > >> Norman > >> > > >
