Sorry Krzystof, maybe this example explains my thinking:
public static void ExecuteWcfAsync<TChannel>(Action<TChannel> proxy) where
TChannel : class
{
TChannel generatedProxy = container.Resolve<TChannel>(); //Need to use IoC
here to get the TChannel from container
ThreadPool.QueueUserWorkItem(state => proxy.Invoke(generatedProxy));
}
The idea is to actually do the async bits inside the ExecuteWcfAsync method.
And if you don't want to use the .Net Thread Pool you can write your own
threading.
________________________________
From: Krzysztof Koźmic <[email protected]>
To: [email protected]
Sent: Thursday, 7 May, 2009 4:02:20 PM
Subject: Re: WCF Facility - Client proxy async calls
John,
Are you familiar with how async pattern works?
What you suggested looks great except that it won't work.
The GetSize syncronous method can't be used to return a value, because
to do that it'd have to execute syncronousely, rendering the whole
effort useless.
Since it can't return IAsyncResult as it should, because it would cause
a runtime error, it retuns null (or 0 for value types).
The point is to somehow make up for the absence of actual methods:
IAsyncResult BeginGetSize(string line, AsyncCallback callback,
object someData);
int EndResult(IAsyncResult);
Code similar to your could work if you used Expression classes,
but I'm resisting using them unless I have to.
I appreciate your help, if you want ping me and I'll send you the
actual code. I'm not going to publish it yet, since it's lacking a lot
a the moment, but it is working and if anyone else wants to play with
it, just drop me a line.
Krzysztof
John Simons pisze:
I'm not very keen on all those casts.
And it doesn't seem natural to call proxy.GetSize(line);
and not assign the result to anything!
Have a look at http://paste2.org/p/199716
Cheers
John
________________________________
From: Krzysztof Koźmic <[email protected]>
To: [email protected]; [email protected]
Sent: Thursday, 7 May,
2009 5:47:22 AM
Subject: WCF Facility
- Client proxy async calls
I'm working on adding to WCF Facility support for async calls from
client side (similar to what can be done with SvcUtil-generated
proxies), when using channelfactory and intereface contract only.
Something like What Ayende wrote about here:
http://ayende.com/Blog/archive/2008/03/29/WCF-Async-without-proxies.aspx
but without having to write IAsyncBus
I have very rough (but working) implementation.
But...
given we don't have an actual async methods to call, we have to have an
alternative syntax (well, at least until C# 4.0 and IDynamicObject, but
that's another story)
http://paste2.org/p/198506 here's what I came up
with.
I encourage you to discussion about it. If you have alternative, better
ideas, you can show it here: http://paste2.org/followup/198506
Thanks,
Krzysztof
________________________________
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