Hello guys,
I''d like to use asynchronous delegates, but it doesn''t
seem to work.
The IronRuby website mentioned that I can do:
______________________________________________________________________>>> require ''System''
=> true>>> require ''System.Core, Version=3.5.0.0, Culture=neutral,
PublicKeyToken=b77a5c561934e089''
=> true>>> my_action = System::Action.new { puts "Howdy!" }
=> System.Action>>> my_action.invoke
"Howdy!"
=> nil
______________________________________________________________________
That works fine, but if I try this instead:
______________________________________________________________________
result = my_action.BeginInvoke(nil,nil)
my_action.EndInvoke(result)
______________________________________________________________________
I get:
System::NullReferenceException: Object reference not set to an instance
of an object.
Am I missing something, or is there another way to do asynchronous
delegates in IR.
Thanks in advance,
Bassel
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Hi Bassel, Ruby provides its own support for asynchronous operations in its Thread class: Thread.new do puts "howdy!" end If you specifically need to run a .NET delegate asynchronously, you can call its invoke method within this structure: Thread.new do my_action.invoke end More info on Ruby''s Thread class: http://corelib.rubyonrails.org/classes/Thread.html Does that meet your needs? Cheers, Mark On Wed, Feb 10, 2010 at 11:25 PM, Bassel Samman <lists at ruby-forum.com>wrote:> Hello guys, > I''d like to use asynchronous delegates, but it doesn''t seem to work. > The IronRuby website mentioned that I can do: > > ______________________________________________________________________ > >>> require ''System'' > => true > >>> require ''System.Core, Version=3.5.0.0, Culture=neutral, > PublicKeyToken=b77a5c561934e089'' > => true > >>> my_action = System::Action.new { puts "Howdy!" } > => System.Action > >>> my_action.invoke > "Howdy!" > => nil > ______________________________________________________________________ > That works fine, but if I try this instead: > > ______________________________________________________________________ > result = my_action.BeginInvoke(nil,nil) > my_action.EndInvoke(result) > ______________________________________________________________________ > > I get: > > System::NullReferenceException: Object reference not set to an instance > of an object. > > > Am I missing something, or is there another way to do asynchronous > delegates in IR. > > Thanks in advance, > > Bassel > -- > Posted via http://www.ruby-forum.com/. > _______________________________________________ > Ironruby-core mailing list > Ironruby-core at rubyforge.org > http://rubyforge.org/mailman/listinfo/ironruby-core >-------------- next part -------------- An HTML attachment was scrubbed... URL: <http://rubyforge.org/pipermail/ironruby-core/attachments/20100211/7ab47f81/attachment.html>
or take a look here: I think the threadpool code is the one you want but it''s commented out right now http://github.com/casualjim/ironnails/blob/master/IronNails/vendor/iron_nails/lib/nails_engine.rb#L61 --- Met vriendelijke groeten - Best regards - Salutations Ivan Porto Carrero GSM: +32.486.787.582 Blog: http://flanders.co.nz Twitter: http://twitter.com/casualjim Author of IronRuby in Action (http://manning.com/carrero) On Thu, Feb 11, 2010 at 2:08 PM, Mark Rendle <mark at markrendle.net> wrote:> Hi Bassel, > > Ruby provides its own support for asynchronous operations in its Thread > class: > > Thread.new do > puts "howdy!" > end > > If you specifically need to run a .NET delegate asynchronously, you can > call its invoke method within this structure: > > Thread.new do > my_action.invoke > end > > More info on Ruby''s Thread class: > http://corelib.rubyonrails.org/classes/Thread.html > > Does that meet your needs? > > Cheers, > Mark > > On Wed, Feb 10, 2010 at 11:25 PM, Bassel Samman <lists at ruby-forum.com>wrote: > >> Hello guys, >> I''d like to use asynchronous delegates, but it doesn''t seem to work. >> The IronRuby website mentioned that I can do: >> >> ______________________________________________________________________ >> >>> require ''System'' >> => true >> >>> require ''System.Core, Version=3.5.0.0, Culture=neutral, >> PublicKeyToken=b77a5c561934e089'' >> => true >> >>> my_action = System::Action.new { puts "Howdy!" } >> => System.Action >> >>> my_action.invoke >> "Howdy!" >> => nil >> ______________________________________________________________________ >> That works fine, but if I try this instead: >> >> ______________________________________________________________________ >> result = my_action.BeginInvoke(nil,nil) >> my_action.EndInvoke(result) >> ______________________________________________________________________ >> >> I get: >> >> System::NullReferenceException: Object reference not set to an instance >> of an object. >> >> >> Am I missing something, or is there another way to do asynchronous >> delegates in IR. >> >> Thanks in advance, >> >> Bassel >> -- >> Posted via http://www.ruby-forum.com/. >> _______________________________________________ >> Ironruby-core mailing list >> Ironruby-core at rubyforge.org >> http://rubyforge.org/mailman/listinfo/ironruby-core >> > > > _______________________________________________ > Ironruby-core mailing list > Ironruby-core at rubyforge.org > http://rubyforge.org/mailman/listinfo/ironruby-core > >-------------- next part -------------- An HTML attachment was scrubbed... URL: <http://rubyforge.org/pipermail/ironruby-core/attachments/20100211/59168b8f/attachment-0001.html>
Thanks guys. I ended up writing a wrapper that takes an action and runs
it in an async delegate and that worked fine. You can obviously get
much fancier, but an example would be along the lines of this:
C# class:
public class WrapInDelegate{
public delegate void DelegateWrapper();
public DelegateWrapper wrapper;
public WrapInDelegate(Action a){
wrapper = delegate(){a.Invoke();};
}
public IAsyncResult BeginInvoke(){
return wrapper.BeginInvoke(null, null);
}
public void EndInvoke(IAsyncResult result){
wrapper.EndInvoke(result);
}
}
>From Ruby:
d = WrapInDelegate.new(System::Action.new { puts "I run for no
man..." })
r = d.BeginInvoke
d.EndInvoke r
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