From: Damphyr <damphyr@...>
Date: 2005-09-09T22:27:40+09:00
Subject: Re: win32ole confusion

Well, I managed to confuse myself even more. I moved the code outside 
the application and it works. So I probably screwed up.

module Test

	class FinderException<RuntimeError
		def initialize modelname
			@modelname=modelname
		end
	end
	class Finder
		attr_reader :modelname, :model
		#Initialize will throw an exception if the model cannot be opened.
		def initialize modelname
			@modelname=modelname
			@app=WIN32OLE.new('RoseRT.Application')
			@model=@app.OpenModel(@modelname)
		end
		
		def start
			@app=WIN32OLE.new('RoseRT.Application')
			@model=@app.OpenModel(@modelname)
		end
		
		def stop
			@app.exit
			@model=nil
			@app=nil
		end
		
		def show
			raise FinderException.new(@modelname),"This Finder instance is 
invalid" unless @model
			@app.visible=true
		end
		
		def hide
			raise FinderException.new(@modelname),"This Finder instance is 
invalid" unless @model
			@app.visible=false
		end
	end
end

ff=Test::Finder.new('a_model')
ff.show
ff.stop
ff.hide
Damphyr wrote:
> OK, I'm trying to wade my way through Rationals Rose RealTime using
> their extensibility interface, just to get some information out of
> *various* models.
> So I need to load one model, do some work, open another model do some
> work etc.
> 
> The following code works without a problem:
> require 'win32ole'
> modelname="some_model"
> app=WIN32OLE.new('RoseRT.Application')
> model=app.OpenModel(modelname)
> app.visible
> and at the end of the script the RoseRT.Application process is exited.
> 
> If I put the same code in an initialize method for a class
> 
> class Finder
>     def initialize modelname
>         @app=WIN32OLE.new('RoseRT.Application')
>         @model=@app.OpenModel(modelname)
>         @app.visible
>     end
> end
> 
> I get the following error
> 
> ./rt_logical.rb:168:in `method_missing': OpenModel (WIN32OLERuntimeError)
>     OLE error code:0 in <Unknown>
>       <No Description>
>     HRESULT error code:0x80020005
>       Type mismatch.    from ./rt_logical.rb:168:in `initialize'
>     from structure.rb:69:in `new'
> 
> If I take the code and put it in a start method in the class
> 
> class Finder2
>     def initialize modelname
>         @modelname=modelname
>         @model=nil
>         @app=nil
>     end
>     
>     def start
>         @app=WIN32OLE.new('RoseRT.Application')
>         @model=@app.OpenModel(@modelname)
>         @app.visible
>     end
> 
>     def search objectname
>         raise RuntimeError,"Finder not started" unless @model
>         #some search thingy
>     end
> end
> 
> and then execute the following:
> 
> ff=Finder.new('some_model')
> begin
>     ff.search 'capsule'
> rescue
>     ff.start
>     retry
> end
> 
> I got the same error as before (once) and then it worked (although at
> the end of the script the RoseRT process is not exited).
> Not to forget to mention that the class Finder is in a module.
> So what am I missing in the whole create/initialize/destroy cycle that
> breaks my script? Do I have some racing condition I need to worry about?
> Cheers,
> V.-
> 
> 
> ____________________________________________________________________
> http://www.freemail.gr - ������ �������� ������������ ������������.
> http://www.freemail.gr - free email service for the Greek-speaking.
> 
> 


____________________________________________________________________
http://www.freemail.gr - ������ �������� ������������ ������������.
http://www.freemail.gr - free email service for the Greek-speaking.