This is essentially how we implemented our rules script engine. It works really well. -- Chuck Durfee Lead Software Architect, CentreSuite TSYS iSolutions, Golden Email cdur...@tsys.com
Tomas Matousek <tomas.matou...@microsoft.com> Sent by: ironruby-core-boun...@rubyforge.org 11/06/2009 05:10 PM Please respond to ironruby-core@rubyforge.org To "ironruby-core@rubyforge.org" <ironruby-core@rubyforge.org> cc Subject Re: [Ironruby-core] ironruby hosting as scripting engine A better way of exposing application objects to the scripts and vice versa is to use ScriptScope: var engine = IronRuby.CreateEngine(); var scope = engine.CreateScope(); scope.SetVariable(“my_app_object”, new App()); engine.Execute(@“ my_app_object.declare 'version 1' def do_stuff 'success' end ”, scope); var execute = scope.GetVariable<Func<string>>(“do_stuff”); Console.WriteLine(execute()); Top level Ruby methods defined in the executed script are published to the scope so that the host can read it via GetVariable method. Also, Ruby methods are convertible to delegates, so you can get the variable as Func<string> and call the delegate later. Tomas From: ironruby-core-boun...@rubyforge.org [mailto:ironruby-core-boun...@rubyforge.org] On Behalf Of Dotan N. Sent: Friday, November 06, 2009 1:54 PM To: ironruby-core@rubyforge.org Subject: Re: [Ironruby-core] ironruby hosting as scripting engine Kevin, Yep i also needed to support input output but it all goes through the "$script" variable back to the backing C# object. for now, it makes it easier to have events and debugging. all in all the end result is that i provide an "API" exposed through $script. Jimmy, Thanks, I clearly overlooked that. On Fri, Nov 6, 2009 at 11:16 PM, Jimmy Schementi < jimmy.scheme...@microsoft.com> wrote: Your solution sounds fine. To answer you first question though: engine.Execute("class Script; end") will always give you nil; classes return nil when defined: >>> class Foo ... end => nil You’ll have to do this to get the actual class object: engine.Execute("class Script; end; Script") ~Jimmy From: ironruby-core-boun...@rubyforge.org [mailto: ironruby-core-boun...@rubyforge.org] On Behalf Of Dotan N. Sent: Friday, November 06, 2009 11:17 AM To: ironruby-core@rubyforge.org Subject: [Ironruby-core] ironruby hosting as scripting engine Hi guys sorry for the lengthy mail but i believe this is interesting since i've found a solution that someone else could use. just had a session of trying to embed IR in my application. I'm defining a user script which contains some initialization code and a special worker function 'execute' this is the "user script": script1.s -------------------------------------------------------- $script.declare "version 1" def execute $script.report "success" end -------------------------------------------------------- what i'm doing is setting "script" as a global variable that is a gateway to my application. I've tried this way first: wrapping script1.s with "class Script <scriopt1.s content> end" and doing Engine.Execute on it. I expected to get a RubyObject as a result, which is the Script class. then with the RubyObject i would do ObjectOperations.Invoke("execute"); when ever i wish. I had 2 problems: 1. the RubyObject was always null. any idea why? 2. I couldn't really define a global variable properly (i've used the $a = a trick from the forum) eventually i've realized this solution: 1. set global variable via RubyContext.DefineGlobalVariable 2. i run everything on my script scope and Execute script1.s directly given a ScriptScope 3. do InvokeMember on the ScriptScope itself from googling i've noticed the solution changed a lot along time. so what is the proper way to do it? Thanks! _______________________________________________ Ironruby-core mailing list Ironruby-core@rubyforge.org http://rubyforge.org/mailman/listinfo/ironruby-core _______________________________________________ Ironruby-core mailing list Ironruby-core@rubyforge.org http://rubyforge.org/mailman/listinfo/ironruby-core ----------------------------------------- The information contained in this communication (including any attachments hereto) is confidential and is intended solely for the personal and confidential use of the individual or entity to whom it is addressed. If the reader of this message is not the intended recipient or an agent responsible for delivering it to the intended recipient, you are hereby notified that you have received this communication in error and that any review, dissemination, copying, or unauthorized use of this information, or the taking of any action in reliance on the contents of this information is strictly prohibited. If you have received this communication in error, please notify us immediately by e-mail, and delete the original message. Thank you
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