Home » Modeling » EMF "Technology" (Ecore Tools, EMFatic, etc) » [Texo] Refresh resources
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| Re: [Texo] Refresh resources [message #1015031 is a reply to message #1015006] |
Wed, 27 February 2013 09:11   |
 Martin Taal
Messages: 5468
Registered: July 2009 |
Senior Member |
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Hi Bastian,
The EObjectStore has a refresh method to refresh individual objects. Would that work for you (I can expose this method
int the TexoResource api directly)?
gr. Martin
On 02/27/2013 08:54 AM, Bastian Wagenfeld wrote:
> Hi Martin,
>
> I was wondering, if there is a possibility to force a refresh of a TexoResource ignoring the cache. For example: I open
> the editor, somebody else changes values in the database, I restart the editor, but the changed values are not shown.
> Can I force to reload the data without a cache? I thought maybe texoResource.getEObjectStore().clearCache() could do
> this, but it doesn't.
>
> Best regards Bastian
--
With Regards, Martin Taal
Springsite/Elver.org
Office: Hardwareweg 4, 3821 BV Amersfoort
Postal: Nassaulaan 7, 3941 EC Doorn
The Netherlands
Cell: +31 (0)6 288 48 943
Tel: +31 (0)84 420 2397
Fax: +31 (0)84 225 9307
Mail: mtaal@xxxxxxxx - mtaal@xxxxxxxx
Web: www.springsite.com - www.elver.org
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| Re: [Texo] Refresh resources [message #1015064 is a reply to message #1015060] |
Wed, 27 February 2013 10:50 |
Martin Taal
Messages: 5468
Registered: July 2009 |
Senior Member |
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Hi Bastian,
So the refresh does not work? (I think I have a testcase for it)
Or the refresh method does not do what you want? (I am open/interested in a different solution btw, with some polling
mechanism or so).
Or you can opt for starting with a new resource when an editor starts. This is more similar to how web apps work (to
limit the data in the browser and load frequently from the server).
gr. Martin
On 02/27/2013 11:36 AM, Bastian Wagenfeld wrote:
> Hi Martin,
>
> that doesn't have the effect I'm searching for. My problem is: - I start the editor --> it loads the resources via Texo
> - Somebody changes the data in the database (not in the editor)
> - I close the editor.
> - I restart the editor. And it loads the resources from the cache (which is good in most cases, because it accelerates
> the start). So the editor shows the same objects it did the last time.
>
> I also tried resource.getEObjectStore().refresh(object) and resource.refresh(object) for all objects or only the
> selected one, but this doesn't make a difference. If I'd call the EntityManager on the server or restart the server, the
> resources are up to date (of course :) ). Could I force this behaviour manually?
>
> Best regards
> Bastian
--
With Regards, Martin Taal
Springsite/Elver.org
Office: Hardwareweg 4, 3821 BV Amersfoort
Postal: Nassaulaan 7, 3941 EC Doorn
The Netherlands
Cell: +31 (0)6 288 48 943
Tel: +31 (0)84 420 2397
Fax: +31 (0)84 225 9307
Mail: mtaal@xxxxxxxx - mtaal@xxxxxxxx
Web: www.springsite.com - www.elver.org
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| Re: [Texo] Refresh resources [message #1015077 is a reply to message #1015070] |
Wed, 27 February 2013 11:38 |
Martin Taal
Messages: 5468
Registered: July 2009 |
Senior Member |
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|
Hi Bastian,
The refresh should read the state from the database, the entitymanager in the servlet should not be re-used/cache data
between different requests. So a refresh request to the server should use a new entitymanager without caching. On the
server there should not be caching.
Could be a bug in Texo?
On the client there are 2 caches: the resource itself maintains a list of eobjects, the eobjectstore has a cache (also
to resolve references in the correct way).
In any case, not sure how practical it is to refresh all objects explicitly... Seems that a different
(to-be-implemented) approach can make more sense. Or can you close the resource when closing the editor?
gr. Martin
On 02/27/2013 12:08 PM, Bastian Wagenfeld wrote:
> Hi Martin,
>
> How is the refresh method supposed to work? Should it ask the EntityManager, if there are changes on the object, or
> should it ask the EntityManager to ask the database (without using cached objects)? If I just refresh an object, changes
> in the database are not shown. Notice, that the changes n the objects aren't done via the EntityManager from the servlet.
>
> Bastian
--
With Regards, Martin Taal
Springsite/Elver.org
Office: Hardwareweg 4, 3821 BV Amersfoort
Postal: Nassaulaan 7, 3941 EC Doorn
The Netherlands
Cell: +31 (0)6 288 48 943
Tel: +31 (0)84 420 2397
Fax: +31 (0)84 225 9307
Mail: mtaal@xxxxxxxx - mtaal@xxxxxxxx
Web: www.springsite.com - www.elver.org
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| Re: [Texo] Refresh resources [message #1015300 is a reply to message #1015299] |
Thu, 28 February 2013 06:59 |
Martin Taal
Messages: 5468
Registered: July 2009 |
Senior Member |
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|
Okay this is indeed a bug. Can you enter a bugzilla?
Then even if refresh works, is it a good solution...? My idea with Texo is to follow a more web-like-pattern where data
is reloaded frequently in the browser and any 'dirty' objects are only detected when committing changes (optimistic
locking).
gr. MArtin
On 02/28/2013 07:55 AM, Bastian Wagenfeld wrote:
> Hi Martin,
>
> what do you mean with close the resource? The JSONTexoResource?
> Refreshing each object isn't a very good solution, indeed :) Most of all, because it doesn't work either. I also tried
> it very basically by calling the servlet in a browser. If I call http://localhost:8080/texo/jsonws/User or
> http://localhost:8080/texo/jsonws/User/1 after I changed the user name in the database, returns the old user. Restarting
> the servlet then works.
> I use the latest Texo version with Eclipse 2.4.1.
>
> Best regards
> Bastian
--
With Regards, Martin Taal
Springsite/Elver.org
Office: Hardwareweg 4, 3821 BV Amersfoort
Postal: Nassaulaan 7, 3941 EC Doorn
The Netherlands
Cell: +31 (0)6 288 48 943
Tel: +31 (0)84 420 2397
Fax: +31 (0)84 225 9307
Mail: mtaal@xxxxxxxx - mtaal@xxxxxxxx
Web: www.springsite.com - www.elver.org
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). Could I force this behaviour manually?