Comments on: Playing Nice With Service Locators http://kohari.org/2008/06/18/playing-nice-with-service-locators/ Organized chaos Fri, 05 Dec 2008 08:17:46 +0000 http://wordpress.org/?v=2.6.2 By: Nate Kohari http://kohari.org/2008/06/18/playing-nice-with-service-locators/#comment-337 Nate Kohari Sat, 21 Jun 2008 12:36:57 +0000 http://kohari.org/?p=89#comment-337 Yeah, Autofac is a very cool framework, and Nicholas has a lot of good ideas. I would imagine that Ninject could support something similar, but I haven't looked into it much at this point. Yeah, Autofac is a very cool framework, and Nicholas has a lot of good ideas. I would imagine that Ninject could support something similar, but I haven’t looked into it much at this point.

]]> By: Fredrik Kalseth http://kohari.org/2008/06/18/playing-nice-with-service-locators/#comment-336 Fredrik Kalseth Sat, 21 Jun 2008 08:53:22 +0000 http://kohari.org/?p=89#comment-336 Hmm, your blog stripped the angle brackets from my comment above; the RegisterGeneratedFactory method should take a generic parameter of type EventWatcherFactory for the code I posted to make any sense :) Hmm, your blog stripped the angle brackets from my comment above; the RegisterGeneratedFactory method should take a generic parameter of type EventWatcherFactory for the code I posted to make any sense :)

]]> By: Fredrik Kalseth http://kohari.org/2008/06/18/playing-nice-with-service-locators/#comment-335 Fredrik Kalseth Sat, 21 Jun 2008 08:49:48 +0000 http://kohari.org/?p=89#comment-335 Have you looked at Autofac? It has a pretty neat feature called 'delegate factories' (http://code.google.com/p/autofac/wiki/DelegateFactories) which can be used to solve this problem. Using your example, you could create a delegate like public delegate EventWatcher EventWatcherFactory(string eventName, Action callback) and register that with the Autofac container containerBuilder.RegisterGeneratedFactory(new TypedService(typeof(EventWatcher))); This would then allow anyone who needs to create EventWatchers to request the injection of the EventWatcherFactory, and use it to create event watchers. This has the added bonus of being typesafe and refactor friendly. I would love to see Ninject offer something similar :) Have you looked at Autofac? It has a pretty neat feature called ‘delegate factories’ (http://code.google.com/p/autofac/wiki/DelegateFactories) which can be used to solve this problem. Using your example, you could create a delegate like

public delegate EventWatcher EventWatcherFactory(string eventName, Action callback)

and register that with the Autofac container

containerBuilder.RegisterGeneratedFactory(new TypedService(typeof(EventWatcher)));

This would then allow anyone who needs to create EventWatchers to request the injection of the EventWatcherFactory, and use it to create event watchers. This has the added bonus of being typesafe and refactor friendly.

I would love to see Ninject offer something similar :)

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