DevForce Community Forum : Coroutine Start example

Coroutine Start example : Hi Scott,Referring to your original...

Mon, 30 Apr 2012 19:11:00 -700

Author: DenisK
Subject: 3400
Posted: 30-Apr-2012 at 7:11pm

Hi Scott,

Referring to your original post, here's a post on our DRC showing how to do serial coroutines with function list. http://drc.ideablade.com/xwiki/bin/view/Documentation/coroutine-function-list

Coroutine Start example : Thank you. That's what...

Tue, 24 Apr 2012 10:23:01 -700

Author: scottarlp
Subject: 3400
Posted: 24-Apr-2012 at 10:23am

Thank you. That's what I needed. I've been trying to yield the method itself instead of the Coroutine.Start() inside the Chain() method and it just didn't dawn on me to nest the Coroutine.Starts inside there. I was hoping to be able to do without the Chain method, but that'll work great for now.

Scott

Coroutine Start example : I think I see where you're...

Tue, 24 Apr 2012 08:00:37 -700

Author: esaulsberry
Subject: 3400
Posted: 24-Apr-2012 at 8:00am

I think I see where you're going now. DoThis and DoThat are themselves coroutine stacks? In which case I think you'll need another level of wrapper.

        private INotifyCompleted CallChain()        {            var op = IdeaBlade.EntityModel.Coroutine.Start(Chain);            op.Completed += (s, a) =>                {                    if (op.CompletedSuccessfully)                    {                        // do something                    }                };            return op;        }        private IEnumerable<INotifyCompleted> Chain()        {            var op1 = IdeaBlade.EntityModel.Coroutine.Start(() => DoThis(x));            yield return op1;             var op2 = IdeaBlade.EntityModel.Coroutine.Start(DoThat);            yield return op2;        }

Coroutine Start example : Scott,Both DoThis and DoThat should...

Tue, 24 Apr 2012 07:44:25 -700

Author: esaulsberry
Subject: 3400
Posted: 24-Apr-2012 at 7:44am

Scott,

Both DoThis and DoThat should be returning a single INotifyCompleted. Are they?

If not perhaps seeing more of the guts of them would help.

Elton

Coroutine Start example : Thanks for the replies. I...

Tue, 24 Apr 2012 05:01:11 -700

Author: scottarlp
Subject: 3400
Posted: 24-Apr-2012 at 5:01am

Thanks for the replies. I need to run the two methods in serial (one is semi-dependent on the other), so I don't think parellel will do the trick. Correct me if I'm wrong here.

I tried esaulsberry's example, but the yield return DoThis(int x) { ... } portion inside DoStuff() gives a convert expression error. The method is a IEnumable list of INotifyCompleted and yield is expecting a single INotifyCompleted result.

From looking at the overloads on Coroutine.Start(), it appeared there was a way to create a ienumable list you could pass and it would fire each in serial, but I either can't figure out the type of list (docs show something like IEnumerable>) or it doesn't do what I thought it does.

I can of course have a Coroutine.Start(...) of one method and then on the completed of it fire the next one, but that's just a couple steps away from outside Coroutine purpose to begin with (daisy callbacks).

Coroutine Start example : If I understand you correctly,...

Mon, 23 Apr 2012 14:10:27 -700

Author: esaulsberry
Subject: 3400
Posted: 23-Apr-2012 at 2:10pm

If I understand you correctly, you'll need to add a method for the .Start() method to call, like this:

priviate IEnumerable DoStuff()

{

yield return DoThis(int x) { ... }

yield return DoThat() {...}

}

Now call that from somewhere:

public void DoAsyncStuffForMe()

{

Coroutine.Start(GetStatusData);

}

You can also set up the caller to notify when it's done:

public INotifiyCompleted DoAsyncStuffForMe(Action onSuccess)

{

var op = Coroutine.Start(GetStatusData);

op.Completed += (s, a) =>

{

if(a.CompletedSuccessfully && onSuccess != null)

{

onSuccess();

}

return op();

}

Coroutine Start example : Hi Scott,Sounds like you might...

Mon, 23 Apr 2012 14:06:30 -700

Author: DenisK
Subject: 3400
Posted: 23-Apr-2012 at 2:06pm

Hi Scott,

Sounds like you might want to use Coroutine.StartParallel instead. http://drc.ideablade.com/xwiki/bin/view/Documentation/parallel-async-coroutines

Coroutine Start example : I've apparently hit a...

Mon, 23 Apr 2012 12:36:57 -700

Author: scottarlp
Subject: 3400
Posted: 23-Apr-2012 at 12:36pm

I've apparently hit a dense point. I'm attempting to call multiple coroutine methods at once to keep from chaining the callbacks.

Given two methods like the following:

public IEnumerable DoThis(int x) { ... }

and

public IEnumerable DoThat() {...}

How do I construct (or can I) the list to call Coroutine.Start(...)? I was trying to create a IEnumerable> list, but I'm not having any luck adding the methods.

Thanks for any help.

Scott