[news.eclipse.modeling] Re: How to make sure that a resource is written

[Ed Merks <Ed.Merks@xxxxxxxxx>]

Roland,

Please post EMF questions to the EMF newsgroup, which I've added to the 
"to" list of the reply.  More comments below.


Roland Brand wrote:
> Hi all
>
> I'm trying to read an EMF resource. In case it does not exist, I 
> create a new one, add some default content to it and call save().
>
> Now I've got the problem, that after the save(), the resource might 
> still not exist and an IOException is thrown when I try to load the 
> resource. It seems like a race condition to me, since it never occurs 
> in the debugger. So I helped myself with the following loop:
>
> while 
> (!resource.getResourceSet().getURIConverter().exists(resource.getURI(), 
> Collections.EMPTY_MAP))
> {
>    System.out.println("save it");
>    resource.save(saveOptions);
> }
>
> It is now clear, that save() does not guarantee the existence of the 
> resource after it has been called. I have seen up to 30 executions of 
> the while-loop until the resource finally existed.
What's the value of the URI?
> My question is: how can I make sure, that the new resource really 
> exists? The while-loop does not look like a nice solution to me. Or am 
> I misunderstanding something?
I wouldn't expect this kind of behavior...
> Thanks for your helpful posts ;-)
>
> Roland