Ayende @ Rahien

Alex Simkin commented on Challenge: Modifying execution approaches

Wed, 03 Aug 2011 11:26:17 GMT

@Chris Wright Not only this pattern got a name, it even got two names. Strategy and State patterns are two names for the same programming construct.

Chris Wright commented on Challenge: Modifying execution approaches

Tue, 02 Aug 2011 23:34:28 GMT

I'm surprised that the strategy pattern is worthy of a name. It's just method object + inheritance, no?

Duarte Nunes commented on Challenge: Modifying execution approaches

Tue, 02 Aug 2011 16:03:01 GMT

Off the top of my head, I would have something like IEnumerator LoadInternal(string id, string[] includes, Func cmd, Func unwrapper); And pump the enumerator either sync or asynchronously. I guess you can sophisticate this a bit to be able to return a typed IEnumerator. (This smells kind of monady).

Scooletz commented on Challenge: Modifying execution approaches

Tue, 02 Aug 2011 11:26:25 GMT

Use lazy enumerable, like in the result of Future from NHibernate. Address the internal choice with a strategy, passing the rest of the code, which must be executed as a some-kind-of continuation. During iteration IEnumerable different actions can occur (the enumerable is produced via strategy, for instance AsynchGetStrategy : IGetStrategy). What do you think about it?

tobi commented on Challenge: Modifying execution approaches

Tue, 02 Aug 2011 09:49:50 GMT

Besides using a delegate as Dave recommended, I would consider having just an async version and using a blocking wait around the call in the synchronous case. That makes for 99% code sharing.

Dave commented on Challenge: Modifying execution approaches

Tue, 02 Aug 2011 09:22:15 GMT

Without having seen the rest of the code, the description of the problem screems 'strategy pattern' to me. If I assume that LoadInternal is used by all three implementations, settings a delegate (which is called on the marked line) could do the job. Whether this is the correct solutions depends ofcourse on more than just the problem you've try to solve.