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getService() without the UI?! [message #334572]

Wed, 18 February 2009 10:40

Eclipse User

Hello,

currently I'm using PlatformUI.getWorkbench().getService() a lot, using
the extensionpoint "org.eclipse.ui.services".

In general its working fine. But it suffers a bit from its bondage to the
UI. Why is something so general like a servicelocator bound to the UI
anyway? Every Plugin I create that uses this servicelocator has to have
"org.eclipse.ui" as a dependency. Even if it is a model plugin (EMF) thats
only dependencie to the UI would be the servicelocator.

Would'nt it be nice to have a UI-less servicelocator?
Aspecially since currently it is not possible to use services as long the
workbench has not been started. Likewise when opening a login dialog
within Application.start() and the connection to a database is controlled
by a ConnectionService... :)

Jan Kohnert

Re: getService() without the UI?! [message #334575 is a reply to message #334572]

Wed, 18 February 2009 11:38

Eclipse User

Hi,

If you want to do things at the lower level I'd suggest to use OSGi
Declarative Services.

If you need an example how to e.g. expose a EMF-Model as a Declarative
Service you can take a look the example application [1] I'm writing for
my EclipseCon [2] talk.

Tom

[1] http://github.com/tomsontom/emf-databinding-example/tree/mas ter
[2]Mixing Eclipse Technologies to create Enterprise Ready
Database-RCP-Frontends - http://www.eclipsecon.org/2009/sessions?id=446

Jan Kohnert schrieb:
> Hello,
>
> currently I'm using PlatformUI.getWorkbench().getService() a lot, using
> the extensionpoint "org.eclipse.ui.services".
>
> In general it�s working fine. But it suffers a bit from its bondage to
> the UI. Why is something so general like a servicelocator bound to the
> UI anyway? Every Plugin I create that uses this servicelocator has to
> have "org.eclipse.ui" as a dependency. Even if it is a model plugin
> (EMF) thats only dependencie to the UI would be the servicelocator.
>
> Would'nt it be nice to have a UI-less servicelocator?
> Aspecially since currently it is not possible to use services as long
> the workbench has not been started. Likewise when opening a login dialog
> within Application.start() and the connection to a database is
> controlled by a ConnectionService... :)
>
> Jan Kohnert
>
>
>

--
B e s t S o l u t i o n . at
------------------------------------------------------------ --------
Tom Schindl JFace-Committer
------------------------------------------------------------ --------

Re: getService() without the UI?! [message #334578 is a reply to message #334572]

Wed, 18 February 2009 13:34

Eclipse User

Jan

I use the Apache Commons Discover component that leverages the Java SPI
specification fairly successfully.

Karl

Jan Kohnert wrote:
> Hello,
>
> currently I'm using PlatformUI.getWorkbench().getService() a lot, using
> the extensionpoint "org.eclipse.ui.services".
>
> In general it�s working fine. But it suffers a bit from its bondage to
> the UI. Why is something so general like a servicelocator bound to the
> UI anyway? Every Plugin I create that uses this servicelocator has to
> have "org.eclipse.ui" as a dependency. Even if it is a model plugin
> (EMF) thats only dependencie to the UI would be the servicelocator.
>
> Would'nt it be nice to have a UI-less servicelocator?
> Aspecially since currently it is not possible to use services as long
> the workbench has not been started. Likewise when opening a login dialog
> within Application.start() and the connection to a database is
> controlled by a ConnectionService... :)
>
> Jan Kohnert
>
>
>

Re: getService() without the UI?! [message #334589 is a reply to message #334575]

Thu, 19 February 2009 05:18

Eclipse User

Tom,

which of your chared plugins contains the declarative service example?

Thanks,
Jan

Tom Schindl wrote:

> Hi,

> If you want to do things at the lower level I'd suggest to use OSGi
> Declarative Services.

> If you need an example how to e.g. expose a EMF-Model as a Declarative
> Service you can take a look the example application [1] I'm writing for
> my EclipseCon [2] talk.

> Tom

> [1] http://github.com/tomsontom/emf-databinding-example/tree/mas ter
> [2]Mixing Eclipse Technologies to create Enterprise Ready
> Database-RCP-Frontends - http://www.eclipsecon.org/2009/sessions?id=446

> Jan Kohnert schrieb:
>> Hello,
>>
>> currently I'm using PlatformUI.getWorkbench().getService() a lot, using
>> the extensionpoint "org.eclipse.ui.services".
>>
>> In general itï¿œs working fine. But it suffers a bit from its bondage to
>> the UI. Why is something so general like a servicelocator bound to the
>> UI anyway? Every Plugin I create that uses this servicelocator has to
>> have "org.eclipse.ui" as a dependency. Even if it is a model plugin
>> (EMF) thats only dependencie to the UI would be the servicelocator.
>>
>> Would'nt it be nice to have a UI-less servicelocator?
>> Aspecially since currently it is not possible to use services as long
>> the workbench has not been started. Likewise when opening a login dialog
>> within Application.start() and the connection to a database is
>> controlled by a ConnectionService... :)
>>
>> Jan Kohnert
>>
>>
>>

Re: getService() without the UI?! [message #334590 is a reply to message #334589]

Thu, 19 February 2009 05:58

Eclipse User

Hi,

* org.eclipse.emf.example.library.service.xmi.test1 declares a service
* org.eclipse.emf.example.library.service.teneo.derby.test1 declares a
service
* org.eclipse.emf.examples.library.databinding consumes them
(See the Activator)

Tom

Jan Kohnert schrieb:
>
>
> Tom,
>
> which of your chared plugins contains the declarative service example?
>
> Thanks,
> Jan
>
> Tom Schindl wrote:
>
>> Hi,
>
>> If you want to do things at the lower level I'd suggest to use OSGi
>> Declarative Services.
>
>> If you need an example how to e.g. expose a EMF-Model as a Declarative
>> Service you can take a look the example application [1] I'm writing for
>> my EclipseCon [2] talk.
>
>> Tom
>
>> [1] http://github.com/tomsontom/emf-databinding-example/tree/mas ter
>> [2]Mixing Eclipse Technologies to create Enterprise Ready
>> Database-RCP-Frontends - http://www.eclipsecon.org/2009/sessions?id=446
>
>
>
>> Jan Kohnert schrieb:
>>> Hello,
>>>
>>> currently I'm using PlatformUI.getWorkbench().getService() a lot, using
>>> the extensionpoint "org.eclipse.ui.services".
>>>
>>> In general itï¿œs working fine. But it suffers a bit from its bondage to
>>> the UI. Why is something so general like a servicelocator bound to the
>>> UI anyway? Every Plugin I create that uses this servicelocator has to
>>> have "org.eclipse.ui" as a dependency. Even if it is a model plugin
>>> (EMF) thats only dependencie to the UI would be the servicelocator.
>>>
>>> Would'nt it be nice to have a UI-less servicelocator?
>>> Aspecially since currently it is not possible to use services as long
>>> the workbench has not been started. Likewise when opening a login dialog
>>> within Application.start() and the connection to a database is
>>> controlled by a ConnectionService... :)
>>>
>>> Jan Kohnert
>>>
>>>
>>>
>
>
>

--
B e s t S o l u t i o n . at
------------------------------------------------------------ --------
Tom Schindl JFace-Committer
------------------------------------------------------------ --------

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