Eclipse Community Forums
Forum Search:

Search      Help    Register    Login    Home
Home » Modeling » Modeling (top-level project) » EMF Transaction advice needed
EMF Transaction advice needed [message #381191] Mon, 20 August 2007 09:50 Go to next message
Marko Tomljenovic is currently offline Marko Tomljenovic
Messages: 62
Registered: July 2009
Member
Hello guys,
since EMFT moved to the EMF project I am posting the question here.

I am just going through the EMFT examples dled from the EMF website. I
have played a bit with the example workspace editor and I am having some
doubts about my understanding of EMFT. Thats why I need some advice.

I am planing to write an editor plugin that should use transactions to
perform the read and write actions. Per project multiple editor instances
of the same kind will be opened. There will be multiple projects open
simultaneously.

The thing is that I do not know how to handle the EditingDomain instances.
Should I only use one for all instances of the editor (but then I would
mixup the resources of different projects). Or is it better to only use
one Editing Domain for one project or one for everything?

Greetings Marko T.
Re: EMF Transaction advice needed [message #381192 is a reply to message #381191] Mon, 20 August 2007 10:59 Go to previous messageGo to next message
Ed Merks is currently offline Ed Merks
Messages: 26130
Registered: July 2009
Senior Member
Marko,

Please use the EMF newsgroup for questions about transactions. I've
added it to the "to" list of the reply. Are the instances in the
separate projects related in some way, or are they completely independent?


Marko T. wrote:
> Hello guys,
> since EMFT moved to the EMF project I am posting the question here.
>
> I am just going through the EMFT examples dled from the EMF website. I
> have played a bit with the example workspace editor and I am having
> some doubts about my understanding of EMFT. Thats why I need some advice.
>
> I am planing to write an editor plugin that should use transactions to
> perform the read and write actions. Per project multiple editor
> instances of the same kind will be opened. There will be multiple
> projects open simultaneously.
>
> The thing is that I do not know how to handle the EditingDomain
> instances. Should I only use one for all instances of the editor (but
> then I would mixup the resources of different projects). Or is it
> better to only use one Editing Domain for one project or one for
> everything?
>
> Greetings Marko T.
>
Re: EMF Transaction advice needed [message #381193 is a reply to message #381192] Mon, 20 August 2007 12:40 Go to previous messageGo to next message
Marko Tomljenovic is currently offline Marko Tomljenovic
Messages: 62
Registered: July 2009
Member
Sorry about the wrong newsgroup. I will use the right one in future posts.

Now, about the projects.

Each project will be independent of the others regarding the editor
instances but several projects will contain files with the same emf meta
model that will be edited by the editor instances.
Re: EMF Transaction advice needed [message #381194 is a reply to message #381193] Mon, 20 August 2007 15:38 Go to previous message
Eclipse User
Originally posted by: cdamus.ca.ibm.com

Hi, Marko,

If your projects are truly independent, then it is probably best these
editors use separate editing domains. This ensures that there can be no
"cross-talk" in the contents of your resources, and allows the different
editors to work concurrently in their separate domains without contending
for unnecessary locks.

Of course, if your requirements should change and you find that the
resources from multiple projects need to be edited together because they
cross-reference one another, it is easy to change your editor to share a
single editing domain (using the editing domain registry).

The EMF metadata isn't really such an issue, as it is largely static
(generated to Java code) and thus isn't owned in the context of any
resource set. Unless, of course, you are using dynamic EMF or importing
schema from XSD on the fly ... then you possibly do want separate instances
of the schema in each resource set, and in each project.

HTH,

Christian

Marko T. wrote:

> Sorry about the wrong newsgroup. I will use the right one in future posts.
>
> Now, about the projects.
>
> Each project will be independent of the others regarding the editor
> instances but several projects will contain files with the same emf meta
> model that will be edited by the editor instances.
Re: EMF Transaction advice needed [message #599284 is a reply to message #381191] Mon, 20 August 2007 10:59 Go to previous message
Ed Merks is currently offline Ed Merks
Messages: 26130
Registered: July 2009
Senior Member
Marko,

Please use the EMF newsgroup for questions about transactions. I've
added it to the "to" list of the reply. Are the instances in the
separate projects related in some way, or are they completely independent?


Marko T. wrote:
> Hello guys,
> since EMFT moved to the EMF project I am posting the question here.
>
> I am just going through the EMFT examples dled from the EMF website. I
> have played a bit with the example workspace editor and I am having
> some doubts about my understanding of EMFT. Thats why I need some advice.
>
> I am planing to write an editor plugin that should use transactions to
> perform the read and write actions. Per project multiple editor
> instances of the same kind will be opened. There will be multiple
> projects open simultaneously.
>
> The thing is that I do not know how to handle the EditingDomain
> instances. Should I only use one for all instances of the editor (but
> then I would mixup the resources of different projects). Or is it
> better to only use one Editing Domain for one project or one for
> everything?
>
> Greetings Marko T.
>
Re: EMF Transaction advice needed [message #599298 is a reply to message #381192] Mon, 20 August 2007 12:40 Go to previous message
Marko Tomljenovic is currently offline Marko Tomljenovic
Messages: 62
Registered: July 2009
Member
Sorry about the wrong newsgroup. I will use the right one in future posts.

Now, about the projects.

Each project will be independent of the others regarding the editor
instances but several projects will contain files with the same emf meta
model that will be edited by the editor instances.
Re: EMF Transaction advice needed [message #599306 is a reply to message #381193] Mon, 20 August 2007 15:38 Go to previous message
Eclipse User
Originally posted by: cdamus.ca.ibm.com

Hi, Marko,

If your projects are truly independent, then it is probably best these
editors use separate editing domains. This ensures that there can be no
"cross-talk" in the contents of your resources, and allows the different
editors to work concurrently in their separate domains without contending
for unnecessary locks.

Of course, if your requirements should change and you find that the
resources from multiple projects need to be edited together because they
cross-reference one another, it is easy to change your editor to share a
single editing domain (using the editing domain registry).

The EMF metadata isn't really such an issue, as it is largely static
(generated to Java code) and thus isn't owned in the context of any
resource set. Unless, of course, you are using dynamic EMF or importing
schema from XSD on the fly ... then you possibly do want separate instances
of the schema in each resource set, and in each project.

HTH,

Christian

Marko T. wrote:

> Sorry about the wrong newsgroup. I will use the right one in future posts.
>
> Now, about the projects.
>
> Each project will be independent of the others regarding the editor
> instances but several projects will contain files with the same emf meta
> model that will be edited by the editor instances.
Previous Topic:EMF Transaction advice needed
Next Topic:Current date as default
Goto Forum:
  


Current Time: Tue Oct 21 21:51:54 GMT 2014

Powered by FUDForum. Page generated in 0.02366 seconds
.:: Contact :: Home ::.

Powered by: FUDforum 3.0.2.
Copyright ©2001-2010 FUDforum Bulletin Board Software