Eclipse Community Forums: EMF » [CDO] CDOViewInvalidationEvent: can I know which CDOSession provoked it?

Home

Home » Modeling » EMF » [CDO] CDOViewInvalidationEvent: can I know which CDOSession provoked it?

[CDO] CDOViewInvalidationEvent: can I know which CDOSession provoked it? [message #1061966]

Wed, 05 June 2013 03:49

Eclipse User

Hi,

In my editors, I register an IListener to the CDOView. When the CDOView receives a CDOViewInvalidationEvent, is it possible to know the origin CDOView or CDOSession that provoked this invalidation? This event only has methods to retrieve the detached and dirty objects, the revision delta and the view source, that coincides with the view of the editor, so it's not valid for me.

Cheers,
Marc

Re: [CDO] CDOViewInvalidationEvent: can I know which CDOSession provoked it? [message #1061989 is a reply to message #1061966]

Wed, 05 June 2013 05:38

Eclipse User

CDOSession or CDOView IDs do not have a lasting meaning. Even if the server would distribute them there would be no guarantee that it can be used in some meaningful way at the time the invalidation event is received. The userID of the CDOSession and the CDOCommitInfo are different, though. You can get access to it directly through the CDOSessionInvalidationEvent (which is a CDOCommitInfo) or use the CDOCommitInfoManager to retrieve the CDOCommitInfo for the time returned by CDOViewInvalidationEvent.getTimeStamp().

Does that help?

Cheers
/Eike

----
http://www.esc-net.de
http://thegordian.blogspot.com
http://twitter.com/eikestepper

Re: [CDO] CDOViewInvalidationEvent: can I know which CDOSession provoked it? [message #1061990 is a reply to message #1061989]

Wed, 05 June 2013 05:50

Eclipse User

mmm Not sure... Or maybe I don't really understand... Imagine these 2 scenarios:

Scenario 1
**********
- User A opens a session.
- User A opens the resource X with its editor.
- User A opens the resource Y with its editor (related with resource X).
- User A modifies resource X and save.
- Editor with resource Y receive the Invalidation and can notify the user.

Scenario 2
**********
- User A opens a session.
- User A opens the resource X with its editor.
- User B opens a session.
- User B opens the resource Y with its editor (related with resource X).
- User A modifies resource X and save.
- User B receives a notification via the editor with resource Y, who received the Invalidation.

Two scenarios are similar, the only difference is that there are 2 different sessions. But in the scenario 1, due to the modifications are done by the same session, I don't want to notify the user, cause he knows that he's modifying the resources. In the scenario 2, user should be notified, cause another user has modified any resource.

Is it possible to do with your provided information?

Cheers,
Marc

Re: [CDO] CDOViewInvalidationEvent: can I know which CDOSession provoked it? [message #1061992 is a reply to message #1061990]

Wed, 05 June 2013 05:57

Eclipse User

You can use CDOSessionInvalidationEvent.getLocalTransaction() which returns null if teh commit comes from a different session.

Cheers
/Eike

----
http://www.esc-net.de
http://thegordian.blogspot.com
http://twitter.com/eikestepper

Re: [CDO] CDOViewInvalidationEvent: can I know which CDOSession provoked it? [message #1061994 is a reply to message #1061992]

Wed, 05 June 2013 06:03

Eclipse User

That's what I need Smile

Thanks a lot Eike!

Cheers,
Marc

Re: [CDO] CDOViewInvalidationEvent: can I know which CDOSession provoked it? [message #1061998 is a reply to message #1061994]

Wed, 05 June 2013 06:41

Eclipse User

You're welcome. Please note that a CDOSessionInvalidationEvent is emitted *before* the views and transactions are invalidated/notified. Compare CDOSessionImpl.invalidateOrdered().

Cheers
/Eike

----
http://www.esc-net.de
http://thegordian.blogspot.com
http://twitter.com/eikestepper

Re: [CDO] CDOViewInvalidationEvent: can I know which CDOSession provoked it? [message #1062002 is a reply to message #1061998]

Wed, 05 June 2013 07:12

Eclipse User

I used the CDOSessionInvalidationEvent to notify the user if the changes comes from a remote session, and the CDOViewInvalidationEvent to refresh the editor with the changes.

Thanks again,
Marc

Previous Topic:	[EMF Compare] Graphical Representation (solved)
Next Topic:	EMF's Jet templates costumization

Goto Forum:

-=] Back to Top [=-

Current Time: Sun Jul 13 07:21:24 EDT 2025

.:: Contact :: Home ::.

Breadcrumbs

Sign up to our Newsletter