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Dotan N.

2009-Nov-06 19:16 UTC

[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!
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Kevin Radcliffe

2009-Nov-06 19:35 UTC

head link

[Ironruby-core] ironruby hosting as scripting engine

Thanks Dotan.

Personally, I have a bit of a hacky solution:

I have a wrapper class with 2 functions SetScriptInput and GetScriptOutput.
These pass and retrieve 2 scope level variables "callerInput" and
"callerOutput" (names are arbitrary)

The internal scripts expect and deal with these variables calling them through:
self.callerInput and self.callerOutput.

It works just fine, but I think I''ll give your method a try as well.
It looks like there will be less artifacts in the script using it
(which would be nice)

Best Regards,
Kevin


On Fri, Nov 6, 2009 at 12:16 PM, Dotan N. <dipidi at gmail.com>
wrote:> 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 at rubyforge.org
> http://rubyforge.org/mailman/listinfo/ironruby-core
>
>

Jimmy Schementi

2009-Nov-06 21:16 UTC

head link

[Ironruby-core] ironruby hosting as scripting engine

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-bounces at rubyforge.org [mailto:ironruby-core-bounces at
rubyforge.org] On Behalf Of Dotan N.
Sent: Friday, November 06, 2009 11:17 AM
To: ironruby-core at 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!


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Dotan N.

2009-Nov-06 21:54 UTC

head link

[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.Schementi at 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-bounces at rubyforge.org [mailto:
> ironruby-core-bounces at rubyforge.org] *On Behalf Of *Dotan N.
> *Sent:* Friday, November 06, 2009 11:17 AM
> *To:* ironruby-core at 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 at rubyforge.org
> http://rubyforge.org/mailman/listinfo/ironruby-core
>
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Tomas Matousek

2009-Nov-07 00:09 UTC

head link

[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-bounces at rubyforge.org [mailto:ironruby-core-bounces at
rubyforge.org] On Behalf Of Dotan N.
Sent: Friday, November 06, 2009 1:54 PM
To: ironruby-core at 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.Schementi at
microsoft.com<mailto:Jimmy.Schementi at 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-bounces at rubyforge.org<mailto:ironruby-core-bounces at
rubyforge.org> [mailto:ironruby-core-bounces at
rubyforge.org<mailto:ironruby-core-bounces at rubyforge.org>] On Behalf Of
Dotan N.
Sent: Friday, November 06, 2009 11:17 AM
To: ironruby-core at rubyforge.org<mailto:ironruby-core at 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 at rubyforge.org<mailto:Ironruby-core at rubyforge.org>
http://rubyforge.org/mailman/listinfo/ironruby-core

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Jimmy Schementi

2009-Nov-07 00:48 UTC

head link

[Ironruby-core] ironruby hosting as scripting engine

Tomas,

Will "my_app_object" be accessible in the do_stuff method? I think
not, since our scope variables are just local ruby variables, right? What
he''d really want is to define a method called "my_app_object"
on the Script class, so then his ".s" files can use
"my_app_object" anywhere, like:

engine Execute(@"class Script
  def my_app_object
    # do whatever you need to get the app object
  end

  <script1.s content>
end")

But I still don''t like wrapping the user script in a class like that.
The preferred way would be to create an instance of script and call
instance_eval with the contents of the script1.s file:

~js

From: ironruby-core-bounces at rubyforge.org [mailto:ironruby-core-bounces at
rubyforge.org] On Behalf Of Tomas Matousek
Sent: Friday, November 06, 2009 4:09 PM
To: ironruby-core at rubyforge.org
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-bounces at rubyforge.org [mailto:ironruby-core-bounces at
rubyforge.org] On Behalf Of Dotan N.
Sent: Friday, November 06, 2009 1:54 PM
To: ironruby-core at 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.Schementi at
microsoft.com<mailto:Jimmy.Schementi at 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-bounces at rubyforge.org<mailto:ironruby-core-bounces at
rubyforge.org> [mailto:ironruby-core-bounces at
rubyforge.org<mailto:ironruby-core-bounces at rubyforge.org>] On Behalf Of
Dotan N.
Sent: Friday, November 06, 2009 11:17 AM
To: ironruby-core at rubyforge.org<mailto:ironruby-core at 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 at rubyforge.org<mailto:Ironruby-core at rubyforge.org>
http://rubyforge.org/mailman/listinfo/ironruby-core

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Tomas Matousek

2009-Nov-07 03:53 UTC

head link

[Ironruby-core] ironruby hosting as scripting engine

It actually works. Any method call on top-level "self" object will
fall back to the scope (we inject method_missing to the top-level object if the
code is executed from hosting code).
It is implemented like instance_eval against the scope.

Tomas

From: ironruby-core-bounces at rubyforge.org [mailto:ironruby-core-bounces at
rubyforge.org] On Behalf Of Jimmy Schementi
Sent: Friday, November 06, 2009 4:48 PM
To: ironruby-core at rubyforge.org
Subject: Re: [Ironruby-core] ironruby hosting as scripting engine

Tomas,

Will "my_app_object" be accessible in the do_stuff method? I think
not, since our scope variables are just local ruby variables, right? What
he''d really want is to define a method called "my_app_object"
on the Script class, so then his ".s" files can use
"my_app_object" anywhere, like:

engine Execute(@"class Script
  def my_app_object
    # do whatever you need to get the app object
  end

  <script1.s content>
end")

But I still don''t like wrapping the user script in a class like that.
The preferred way would be to create an instance of script and call
instance_eval with the contents of the script1.s file:

~js

From: ironruby-core-bounces at rubyforge.org [mailto:ironruby-core-bounces at
rubyforge.org] On Behalf Of Tomas Matousek
Sent: Friday, November 06, 2009 4:09 PM
To: ironruby-core at rubyforge.org
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-bounces at rubyforge.org [mailto:ironruby-core-bounces at
rubyforge.org] On Behalf Of Dotan N.
Sent: Friday, November 06, 2009 1:54 PM
To: ironruby-core at 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.Schementi at
microsoft.com<mailto:Jimmy.Schementi at 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-bounces at rubyforge.org<mailto:ironruby-core-bounces at
rubyforge.org> [mailto:ironruby-core-bounces at
rubyforge.org<mailto:ironruby-core-bounces at rubyforge.org>] On Behalf Of
Dotan N.
Sent: Friday, November 06, 2009 11:17 AM
To: ironruby-core at rubyforge.org<mailto:ironruby-core at 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 at rubyforge.org<mailto:Ironruby-core at rubyforge.org>
http://rubyforge.org/mailman/listinfo/ironruby-core

-------------- next part --------------
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Tomas Matousek

2009-Nov-07 03:59 UTC

head link

[Ironruby-core] ironruby hosting as scripting engine

Just to be clear, this works:

public class App { public string Name = "hello"; }

var engine = IronRuby.CreateEngine();
var scope = engine.CreateScope();
scope.SetVariable("my_app_object", new App());

engine.Execute(@"
def do_stuff
  my_app_object.name
end
", scope);

var execute = scope.GetVariable<Func<string>>("do_stuff");
Console.WriteLine(execute());

Tomas


From: ironruby-core-bounces at rubyforge.org [mailto:ironruby-core-bounces at
rubyforge.org] On Behalf Of Tomas Matousek
Sent: Friday, November 06, 2009 7:53 PM
To: ironruby-core at rubyforge.org
Subject: Re: [Ironruby-core] ironruby hosting as scripting engine

It actually works. Any method call on top-level "self" object will
fall back to the scope (we inject method_missing to the top-level object if the
code is executed from hosting code).
It is implemented like instance_eval against the scope.

Tomas

From: ironruby-core-bounces at rubyforge.org [mailto:ironruby-core-bounces at
rubyforge.org] On Behalf Of Jimmy Schementi
Sent: Friday, November 06, 2009 4:48 PM
To: ironruby-core at rubyforge.org
Subject: Re: [Ironruby-core] ironruby hosting as scripting engine

Tomas,

Will "my_app_object" be accessible in the do_stuff method? I think
not, since our scope variables are just local ruby variables, right? What
he''d really want is to define a method called "my_app_object"
on the Script class, so then his ".s" files can use
"my_app_object" anywhere, like:

engine Execute(@"class Script
  def my_app_object
    # do whatever you need to get the app object
  end

  <script1.s content>
end")

But I still don''t like wrapping the user script in a class like that.
The preferred way would be to create an instance of script and call
instance_eval with the contents of the script1.s file:

~js

From: ironruby-core-bounces at rubyforge.org [mailto:ironruby-core-bounces at
rubyforge.org] On Behalf Of Tomas Matousek
Sent: Friday, November 06, 2009 4:09 PM
To: ironruby-core at rubyforge.org
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-bounces at rubyforge.org [mailto:ironruby-core-bounces at
rubyforge.org] On Behalf Of Dotan N.
Sent: Friday, November 06, 2009 1:54 PM
To: ironruby-core at 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.Schementi at
microsoft.com<mailto:Jimmy.Schementi at 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-bounces at rubyforge.org<mailto:ironruby-core-bounces at
rubyforge.org> [mailto:ironruby-core-bounces at
rubyforge.org<mailto:ironruby-core-bounces at rubyforge.org>] On Behalf Of
Dotan N.
Sent: Friday, November 06, 2009 11:17 AM
To: ironruby-core at rubyforge.org<mailto:ironruby-core at 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 at rubyforge.org<mailto:Ironruby-core at rubyforge.org>
http://rubyforge.org/mailman/listinfo/ironruby-core

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CDurfee at tsys.com

2009-Nov-09 15:35 UTC

head link

[Ironruby-core] ironruby hosting as scripting engine

This is essentially how we implemented our rules script engine. It works 
really well.
 
-- 
Chuck Durfee
Lead Software Architect, CentreSuite
TSYS iSolutions, Golden
Email cdurfee at tsys.com
 



Tomas Matousek <Tomas.Matousek at microsoft.com> 
Sent by: ironruby-core-bounces at rubyforge.org
11/06/2009 05:10 PM
Please respond to
ironruby-core at rubyforge.org


To
"ironruby-core at rubyforge.org" <ironruby-core at
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-bounces at rubyforge.org 
[mailto:ironruby-core-bounces at rubyforge.org] On Behalf Of Dotan N.
Sent: Friday, November 06, 2009 1:54 PM
To: ironruby-core at 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.Schementi at 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-bounces at rubyforge.org [mailto:
ironruby-core-bounces at rubyforge.org] On Behalf Of Dotan N.
Sent: Friday, November 06, 2009 11:17 AM
To: ironruby-core at 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 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



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Kevin Radcliffe

2009-Nov-11 19:34 UTC

head link

[Ironruby-core] ironruby hosting as scripting engine

Tomas, is this new, or changed? I couldn''t seem to call a method using
what you showed.
Because "do_stuff" is a function that returns a list (in my case) I
couldn''t do:

var execute = scope.GetVariable<Func<string>>(?do_stuff?);

But instead, had to do something like this:

return engine.Execute<TOutput>("do_stuff", scope);

In any case, it worked. Just wondering if it won''t allow for some
reason because I am expecting a complex type back (IList<string>)

Thanks, -Kevin

On Fri, Nov 6, 2009 at 8:59 PM, Tomas Matousek
<Tomas.Matousek at microsoft.com> wrote:> Just to be clear, this works:
>
>
>
> public class App { public string Name = ?hello?; }
>
>
>
> var engine = IronRuby.CreateEngine();
>
> var scope = engine.CreateScope();
>
> scope.SetVariable(?my_app_object?, new App());
>
>
>
> engine.Execute(@?
>
> def do_stuff
> ??my_app_object.name
> end
>
> ?, scope);
>
>
>
> var execute = scope.GetVariable<Func<string>>(?do_stuff?);
>
> Console.WriteLine(execute());
>
>
>
> Tomas
>
>
>
>
>
> From: ironruby-core-bounces at rubyforge.org
> [mailto:ironruby-core-bounces at rubyforge.org] On Behalf Of Tomas Matousek
> Sent: Friday, November 06, 2009 7:53 PM
>
> To: ironruby-core at rubyforge.org
> Subject: Re: [Ironruby-core] ironruby hosting as scripting engine
>
>
>
> It actually works. Any method call on top-level ?self? object will fall
back
> to the scope (we inject method_missing to the top-level object if the code
> is executed from hosting code).
>
> It is implemented like instance_eval against the scope.
>
>
>
> Tomas
>
>
>
> From: ironruby-core-bounces at rubyforge.org
> [mailto:ironruby-core-bounces at rubyforge.org] On Behalf Of Jimmy
Schementi
> Sent: Friday, November 06, 2009 4:48 PM
> To: ironruby-core at rubyforge.org
> Subject: Re: [Ironruby-core] ironruby hosting as scripting engine
>
>
>
> Tomas,
>
>
>
> Will ?my_app_object? be accessible in the do_stuff method? I think not,
> since our scope variables are just local ruby variables, right? What he?d
> really want is to define a method called ?my_app_object? on the Script
> class, so then his ?.s? files can use ?my_app_object? anywhere, like:
>
>
>
> engine Execute(@?class Script
>
> ? def my_app_object
>
> ? ??# do whatever you need to get the app object
>
> ? end
>
>
>
> ??<script1.s content>
>
> end?)
>
>
>
> But I still don?t like wrapping the user script in a class like that. The
> preferred way would be to create an instance of script and call
> instance_eval with the contents of the script1.s file:
>
>
>
> ~js
>
>
>
> From: ironruby-core-bounces at rubyforge.org
> [mailto:ironruby-core-bounces at rubyforge.org] On Behalf Of Tomas Matousek
> Sent: Friday, November 06, 2009 4:09 PM
> To: ironruby-core at rubyforge.org
> 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-bounces at rubyforge.org
> [mailto:ironruby-core-bounces at rubyforge.org] On Behalf Of Dotan N.
> Sent: Friday, November 06, 2009 1:54 PM
> To: ironruby-core at 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.Schementi at 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-bounces at rubyforge.org
> [mailto:ironruby-core-bounces at rubyforge.org] On Behalf Of Dotan N.
> Sent: Friday, November 06, 2009 11:17 AM
> To: ironruby-core at 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 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
>
>

Tomas Matousek

2009-Nov-11 21:28 UTC

head link

[Ironruby-core] ironruby hosting as scripting engine

GetVariable<T> and Execute<T> should do the same conversion. Could
you send the snippet that doesn''t work?

Tomas

-----Original Message-----
From: ironruby-core-bounces at rubyforge.org [mailto:ironruby-core-bounces at
rubyforge.org] On Behalf Of Kevin Radcliffe
Sent: Wednesday, November 11, 2009 11:35 AM
To: ironruby-core at rubyforge.org
Subject: Re: [Ironruby-core] ironruby hosting as scripting engine

Tomas, is this new, or changed? I couldn''t seem to call a method using
what you showed.
Because "do_stuff" is a function that returns a list (in my case) I
couldn''t do:

var execute = scope.GetVariable<Func<string>>("do_stuff");

But instead, had to do something like this:

return engine.Execute<TOutput>("do_stuff", scope);

In any case, it worked. Just wondering if it won''t allow for some
reason because I am expecting a complex type back (IList<string>)

Thanks, -Kevin

On Fri, Nov 6, 2009 at 8:59 PM, Tomas Matousek <Tomas.Matousek at
microsoft.com> wrote:> Just to be clear, this works:
>
>
>
> public class App { public string Name = "hello"; }
>
>
>
> var engine = IronRuby.CreateEngine();
>
> var scope = engine.CreateScope();
>
> scope.SetVariable("my_app_object", new App());
>
>
>
> engine.Execute(@"
>
> def do_stuff
> ??my_app_object.name
> end
>
> ", scope);
>
>
>
> var execute =
scope.GetVariable<Func<string>>("do_stuff");
>
> Console.WriteLine(execute());
>
>
>
> Tomas
>
>
>
>
>
> From: ironruby-core-bounces at rubyforge.org
> [mailto:ironruby-core-bounces at rubyforge.org] On Behalf Of Tomas 
> Matousek
> Sent: Friday, November 06, 2009 7:53 PM
>
> To: ironruby-core at rubyforge.org
> Subject: Re: [Ironruby-core] ironruby hosting as scripting engine
>
>
>
> It actually works. Any method call on top-level "self" object
will
> fall back to the scope (we inject method_missing to the top-level 
> object if the code is executed from hosting code).
>
> It is implemented like instance_eval against the scope.
>
>
>
> Tomas
>
>
>
> From: ironruby-core-bounces at rubyforge.org
> [mailto:ironruby-core-bounces at rubyforge.org] On Behalf Of Jimmy 
> Schementi
> Sent: Friday, November 06, 2009 4:48 PM
> To: ironruby-core at rubyforge.org
> Subject: Re: [Ironruby-core] ironruby hosting as scripting engine
>
>
>
> Tomas,
>
>
>
> Will "my_app_object" be accessible in the do_stuff method? I
think
> not, since our scope variables are just local ruby variables, right? 
> What he''d really want is to define a method called
"my_app_object" on
> the Script class, so then his ".s" files can use
"my_app_object" anywhere, like:
>
>
>
> engine Execute(@"class Script
>
> ? def my_app_object
>
> ? ??# do whatever you need to get the app object
>
> ? end
>
>
>
> ??<script1.s content>
>
> end")
>
>
>
> But I still don''t like wrapping the user script in a class like
that.
> The preferred way would be to create an instance of script and call 
> instance_eval with the contents of the script1.s file:
>
>
>
> ~js
>
>
>
> From: ironruby-core-bounces at rubyforge.org
> [mailto:ironruby-core-bounces at rubyforge.org] On Behalf Of Tomas 
> Matousek
> Sent: Friday, November 06, 2009 4:09 PM
> To: ironruby-core at rubyforge.org
> 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-bounces at rubyforge.org
> [mailto:ironruby-core-bounces at rubyforge.org] On Behalf Of Dotan N.
> Sent: Friday, November 06, 2009 1:54 PM
> To: ironruby-core at 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.Schementi at 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-bounces at rubyforge.org
> [mailto:ironruby-core-bounces at rubyforge.org] On Behalf Of Dotan N.
> Sent: Friday, November 06, 2009 11:17 AM
> To: ironruby-core at 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 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
>
>_______________________________________________
Ironruby-core mailing list
Ironruby-core at rubyforge.org
http://rubyforge.org/mailman/listinfo/ironruby-core

Kevin Radcliffe

2009-Nov-11 21:37 UTC

head link

[Ironruby-core] ironruby hosting as scripting engine

Tomas, I wasn''t reading your snippet right, the execute automatically
executes..
But with the variable, you have to call it, I didn''t notice that in
your example you are actually calling it with () after you retrieve as
a var.
Sorry for the trouble. Works now, and is obvious why I was mistaken, Thanks

Best Regards, Kevin

On Wed, Nov 11, 2009 at 2:28 PM, Tomas Matousek
<Tomas.Matousek at microsoft.com> wrote:> GetVariable<T> and Execute<T> should do the same conversion.
Could you send the snippet that doesn''t work?
>
> Tomas
>
> -----Original Message-----
> From: ironruby-core-bounces at rubyforge.org [mailto:ironruby-core-bounces
at rubyforge.org] On Behalf Of Kevin Radcliffe
> Sent: Wednesday, November 11, 2009 11:35 AM
> To: ironruby-core at rubyforge.org
> Subject: Re: [Ironruby-core] ironruby hosting as scripting engine
>
> Tomas, is this new, or changed? I couldn''t seem to call a method
using what you showed.
> Because "do_stuff" is a function that returns a list (in my case)
I couldn''t do:
>
> var execute =
scope.GetVariable<Func<string>>("do_stuff");
>
> But instead, had to do something like this:
>
> return engine.Execute<TOutput>("do_stuff", scope);
>
> In any case, it worked. Just wondering if it won''t allow for some
reason because I am expecting a complex type back (IList<string>)
>
> Thanks, -Kevin
>
> On Fri, Nov 6, 2009 at 8:59 PM, Tomas Matousek <Tomas.Matousek at
microsoft.com> wrote:
>> Just to be clear, this works:
>>
>>
>>
>> public class App { public string Name = "hello"; }
>>
>>
>>
>> var engine = IronRuby.CreateEngine();
>>
>> var scope = engine.CreateScope();
>>
>> scope.SetVariable("my_app_object", new App());
>>
>>
>>
>> engine.Execute(@"
>>
>> def do_stuff
>> ??my_app_object.name
>> end
>>
>> ", scope);
>>
>>
>>
>> var execute =
scope.GetVariable<Func<string>>("do_stuff");
>>
>> Console.WriteLine(execute());
>>
>>
>>
>> Tomas
>>
>>
>>
>>
>>
>> From: ironruby-core-bounces at rubyforge.org
>> [mailto:ironruby-core-bounces at rubyforge.org] On Behalf Of Tomas
>> Matousek
>> Sent: Friday, November 06, 2009 7:53 PM
>>
>> To: ironruby-core at rubyforge.org
>> Subject: Re: [Ironruby-core] ironruby hosting as scripting engine
>>
>>
>>
>> It actually works. Any method call on top-level "self" object
will
>> fall back to the scope (we inject method_missing to the top-level
>> object if the code is executed from hosting code).
>>
>> It is implemented like instance_eval against the scope.
>>
>>
>>
>> Tomas
>>
>>
>>
>> From: ironruby-core-bounces at rubyforge.org
>> [mailto:ironruby-core-bounces at rubyforge.org] On Behalf Of Jimmy
>> Schementi
>> Sent: Friday, November 06, 2009 4:48 PM
>> To: ironruby-core at rubyforge.org
>> Subject: Re: [Ironruby-core] ironruby hosting as scripting engine
>>
>>
>>
>> Tomas,
>>
>>
>>
>> Will "my_app_object" be accessible in the do_stuff method? I
think
>> not, since our scope variables are just local ruby variables, right?
>> What he''d really want is to define a method called
"my_app_object" on
>> the Script class, so then his ".s" files can use
"my_app_object" anywhere, like:
>>
>>
>>
>> engine Execute(@"class Script
>>
>> ? def my_app_object
>>
>> ? ??# do whatever you need to get the app object
>>
>> ? end
>>
>>
>>
>> ??<script1.s content>
>>
>> end")
>>
>>
>>
>> But I still don''t like wrapping the user script in a class
like that.
>> The preferred way would be to create an instance of script and call
>> instance_eval with the contents of the script1.s file:
>>
>>
>>
>> ~js
>>
>>
>>
>> From: ironruby-core-bounces at rubyforge.org
>> [mailto:ironruby-core-bounces at rubyforge.org] On Behalf Of Tomas
>> Matousek
>> Sent: Friday, November 06, 2009 4:09 PM
>> To: ironruby-core at rubyforge.org
>> 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-bounces at rubyforge.org
>> [mailto:ironruby-core-bounces at rubyforge.org] On Behalf Of Dotan N.
>> Sent: Friday, November 06, 2009 1:54 PM
>> To: ironruby-core at 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.Schementi at 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-bounces at rubyforge.org
>> [mailto:ironruby-core-bounces at rubyforge.org] On Behalf Of Dotan N.
>> Sent: Friday, November 06, 2009 11:17 AM
>> To: ironruby-core at 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 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
>>
>>
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Ironruby core - Nov 2009 - ironruby hosting as scripting engine

[Ironruby-core] ironruby hosting as scripting engine

[Ironruby-core] ironruby hosting as scripting engine

[Ironruby-core] ironruby hosting as scripting engine

[Ironruby-core] ironruby hosting as scripting engine

[Ironruby-core] ironruby hosting as scripting engine

[Ironruby-core] ironruby hosting as scripting engine

[Ironruby-core] ironruby hosting as scripting engine

[Ironruby-core] ironruby hosting as scripting engine

[Ironruby-core] ironruby hosting as scripting engine

[Ironruby-core] ironruby hosting as scripting engine

[Ironruby-core] ironruby hosting as scripting engine

[Ironruby-core] ironruby hosting as scripting engine