Home » Modeling » EMF » Resources that are removed from the ResourceSet reappear
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| Re: Resources that are removed from the ResourceSet reappear [message #498578 is a reply to message #498550] |
Tue, 17 November 2009 14:48   |
 Ed Merks
Messages: 33141
Registered: July 2009 |
Senior Member |
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Artun,
Comments below.
Artun Subasi wrote:
> Hello,
>
> I am working on the navigator part of our application. The entities
> that are seen on the navigator correspond to both Eclipse platform
> resources and EObjects which are persisted in EMF resources.
>
> I recently implemented a delete action. Deleting an entity first
> updates the EMF model, then removes the EMF resource from the
> ResourceSet. Finally it deletes the Eclipse platform resources. (It
> also deletes all proxy references to the deleted entity.)
>
> After the last line of the delete action, the ResourceSet does not
> contain the deleted entity. However, after some time it reappears in
> the ResourceSet, which causes problems in the future if I try to
> create a new entity with the same URI. I couldn't find out when the
> resource is readded to the ResourceSet by debugging because I get
> stuck in an event loop after my action. As soon as I press resume to
> get out of the event loop, the resource is back there...
Set a breakpoint in ResourceSetImpl.demandCreateResource
>
>
> I can't find out why the resource reappears in the ResourceSet.
No doubt a proxy is being resolved causing the references resource to be
loaded again.
> I could probably solve my problems with workarounds (for example by
> reloading the resource to make sure the old one is not loaded), but I
> am searching for a better way. Plus, I am very curious. :)
>
> Artun Subasi
Ed Merks
Professional Support: https://www.macromodeling.com/
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| Re: Resources that are removed from the ResourceSet reappear [message #498601 is a reply to message #498578] |
Tue, 17 November 2009 16:14 |
Artun Subasi
Messages: 20
Registered: July 2009 |
Junior Member |
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Thanks Ed. You are quick, as always. =)
You were right. A proxy is causing the references to be loaded again. I
was sure that I removed all proxies from my data model. The problem
seems to be the viewer (and ViewerRefresh).
My AdapterFactoryContentProvider$ViewerRefresh calls the refresh method
with a viewer notification that the EObject was removed from the data
model. This causes the object to be resolved again and it appears in the
resource set.
I think this ViewerRefresh method is called asynchronously with
Display.runAsync, therefore it happens after my operation terminates. Is
there a way to prevent this?
Ed Merks wrote:
> Artun,
>
> Comments below.
>
>
> Artun Subasi wrote:
>> Hello,
>>
>> I am working on the navigator part of our application. The entities
>> that are seen on the navigator correspond to both Eclipse platform
>> resources and EObjects which are persisted in EMF resources.
>>
>> I recently implemented a delete action. Deleting an entity first
>> updates the EMF model, then removes the EMF resource from the
>> ResourceSet. Finally it deletes the Eclipse platform resources. (It
>> also deletes all proxy references to the deleted entity.)
>>
>> After the last line of the delete action, the ResourceSet does not
>> contain the deleted entity. However, after some time it reappears in
>> the ResourceSet, which causes problems in the future if I try to
>> create a new entity with the same URI. I couldn't find out when the
>> resource is readded to the ResourceSet by debugging because I get
>> stuck in an event loop after my action. As soon as I press resume to
>> get out of the event loop, the resource is back there...
> Set a breakpoint in ResourceSetImpl.demandCreateResource
>>
>>
>> I can't find out why the resource reappears in the ResourceSet.
> No doubt a proxy is being resolved causing the references resource to be
> loaded again.
>> I could probably solve my problems with workarounds (for example by
>> reloading the resource to make sure the old one is not loaded), but I
>> am searching for a better way. Plus, I am very curious. :)
>>
>> Artun Subasi
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| Re: Resources that are removed from the ResourceSet reappear [message #498618 is a reply to message #498601] |
Tue, 17 November 2009 16:54 |
Ed Merks
Messages: 33141
Registered: July 2009 |
Senior Member |
|
|
Artun,
Comments below.
Artun Subasi wrote:
> Thanks Ed. You are quick, as always. =)
>
> You were right. A proxy is causing the references to be loaded again.
> I was sure that I removed all proxies from my data model. The problem
> seems to be the viewer (and ViewerRefresh).
>
> My AdapterFactoryContentProvider$ViewerRefresh calls the refresh
> method with a viewer notification that the EObject was removed from
> the data model. This causes the object to be resolved again and it
> appears in the resource set.
>
> I think this ViewerRefresh method is called asynchronously with
> Display.runAsync, therefore it happens after my operation terminates.
> Is there a way to prevent this?
It sounds like the selection is being restored so likely resetting the
selection to a non-deleted object will avoid this.
>
> Ed Merks wrote:
>> Artun,
>>
>> Comments below.
>>
>>
>> Artun Subasi wrote:
>>> Hello,
>>>
>>> I am working on the navigator part of our application. The entities
>>> that are seen on the navigator correspond to both Eclipse platform
>>> resources and EObjects which are persisted in EMF resources.
>>>
>>> I recently implemented a delete action. Deleting an entity first
>>> updates the EMF model, then removes the EMF resource from the
>>> ResourceSet. Finally it deletes the Eclipse platform resources. (It
>>> also deletes all proxy references to the deleted entity.)
>>>
>>> After the last line of the delete action, the ResourceSet does not
>>> contain the deleted entity. However, after some time it reappears in
>>> the ResourceSet, which causes problems in the future if I try to
>>> create a new entity with the same URI. I couldn't find out when the
>>> resource is readded to the ResourceSet by debugging because I get
>>> stuck in an event loop after my action. As soon as I press resume to
>>> get out of the event loop, the resource is back there...
>> Set a breakpoint in ResourceSetImpl.demandCreateResource
>>>
>>>
>>> I can't find out why the resource reappears in the ResourceSet.
>> No doubt a proxy is being resolved causing the references resource to
>> be loaded again.
>>> I could probably solve my problems with workarounds (for example by
>>> reloading the resource to make sure the old one is not loaded), but
>>> I am searching for a better way. Plus, I am very curious. :)
>>>
>>> Artun Subasi
Ed Merks
Professional Support: https://www.macromodeling.com/
|
|
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| Re: Resources that are removed from the ResourceSet reappear [message #498717 is a reply to message #498618] |
Wed, 18 November 2009 10:35 |
Artun Subasi
Messages: 20
Registered: July 2009 |
Junior Member |
|
|
Thanks Ed,
Right again! Resetting the selection to a non-deleted object solved the
problem.
Ed Merks wrote:
> Artun,
>
> Comments below.
>
> Artun Subasi wrote:
>> Thanks Ed. You are quick, as always. =)
>>
>> You were right. A proxy is causing the references to be loaded again.
>> I was sure that I removed all proxies from my data model. The problem
>> seems to be the viewer (and ViewerRefresh).
>>
>> My AdapterFactoryContentProvider$ViewerRefresh calls the refresh
>> method with a viewer notification that the EObject was removed from
>> the data model. This causes the object to be resolved again and it
>> appears in the resource set.
>>
>> I think this ViewerRefresh method is called asynchronously with
>> Display.runAsync, therefore it happens after my operation terminates.
>> Is there a way to prevent this?
> It sounds like the selection is being restored so likely resetting the
> selection to a non-deleted object will avoid this.
>>
>> Ed Merks wrote:
>>> Artun,
>>>
>>> Comments below.
>>>
>>>
>>> Artun Subasi wrote:
>>>> Hello,
>>>>
>>>> I am working on the navigator part of our application. The entities
>>>> that are seen on the navigator correspond to both Eclipse platform
>>>> resources and EObjects which are persisted in EMF resources.
>>>>
>>>> I recently implemented a delete action. Deleting an entity first
>>>> updates the EMF model, then removes the EMF resource from the
>>>> ResourceSet. Finally it deletes the Eclipse platform resources. (It
>>>> also deletes all proxy references to the deleted entity.)
>>>>
>>>> After the last line of the delete action, the ResourceSet does not
>>>> contain the deleted entity. However, after some time it reappears in
>>>> the ResourceSet, which causes problems in the future if I try to
>>>> create a new entity with the same URI. I couldn't find out when the
>>>> resource is readded to the ResourceSet by debugging because I get
>>>> stuck in an event loop after my action. As soon as I press resume to
>>>> get out of the event loop, the resource is back there...
>>> Set a breakpoint in ResourceSetImpl.demandCreateResource
>>>>
>>>>
>>>> I can't find out why the resource reappears in the ResourceSet.
>>> No doubt a proxy is being resolved causing the references resource to
>>> be loaded again.
>>>> I could probably solve my problems with workarounds (for example by
>>>> reloading the resource to make sure the old one is not loaded), but
>>>> I am searching for a better way. Plus, I am very curious. :)
>>>>
>>>> Artun Subasi
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