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Posted to dev@avalon.apache.org by Neeme Praks <ne...@inpoc.com> on 2001/12/27 19:13:32 UTC
componentmanager and looking up different implementations of the same role
I have the following issue: can I ask the componentmanager to lookup a
component by the "shorthand" name?
I need to have more than one implementation of the same role, and I need to
somehow look up those different implementations. Any other way to achieve
that?
(I'm in the middle of another round of refactoring the i18n stuff :-))
Rgds,
Neeme
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Re: componentmanager and looking up different implementations of the same role
Posted by Berin Loritsch <bl...@apache.org>.
Neeme Praks wrote:
>>-----Original Message-----
>>From: Berin Loritsch [mailto:bloritsch@apache.org]
>>Sent: Thursday, December 27, 2001 8:41 PM
>>
>>If you are using the ExcaliburComponentManager, then no. It is taken care
>>of by the configuration file. For example:
>>
>><resources>
>> <xml name="foo" file="/over/there.xml"/>
>> <file name="bar" rootdir="/over/here"/>
>> <file name="baz" rootdir="/over/hill"/>
>> <xml name="blah" file="/over/dale.xml"/>
>></resources>
>>
>>(with the proper entries in RoleManager) will allow you to get
>>the resources
>>with the hint matching the name in the configuration file.
>>
>
> Hmm, looks promising. Is there somewhere some more documentation about this
> (I haven't found yet :-()?
> If not, then can you present the whole configuration file for this? Together
> with rolemanager entries, etc...?
Look at "Developing with Avalon" and Chapter 3 "Implementing the Dream". It
is described pretty well there.
--
"They that give up essential liberty to obtain a little temporary safety
deserve neither liberty nor safety."
- Benjamin Franklin
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RE: componentmanager and looking up different implementations of the same role
Posted by Neeme Praks <ne...@apache.org>.
> -----Original Message-----
> From: Berin Loritsch [mailto:bloritsch@apache.org]
> Sent: Thursday, December 27, 2001 8:41 PM
>
> If you are using the ExcaliburComponentManager, then no. It is taken care
> of by the configuration file. For example:
>
> <resources>
> <xml name="foo" file="/over/there.xml"/>
> <file name="bar" rootdir="/over/here"/>
> <file name="baz" rootdir="/over/hill"/>
> <xml name="blah" file="/over/dale.xml"/>
> </resources>
>
> (with the proper entries in RoleManager) will allow you to get
> the resources
> with the hint matching the name in the configuration file.
Hmm, looks promising. Is there somewhere some more documentation about this
(I haven't found yet :-()?
If not, then can you present the whole configuration file for this? Together
with rolemanager entries, etc...?
Neeme
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Re: componentmanager and looking up different implementations of the same role
Posted by Berin Loritsch <bl...@apache.org>.
Neeme Praks wrote:
>>-----Original Message-----
>>From: Berin Loritsch [mailto:bloritsch@apache.org]
>>Sent: Thursday, December 27, 2001 8:24 PM
>>
>>ComponentSelector. ComponentSelector was designed for this purpose.
>>
>>Per the Developer's docs, if you use a selector, append the "Selector"
>>designator to the role name:
>>
>>ComponentSelector selector = (ComponentSelector) manager.lookup(
>>Resource.ROLE + "Selector" );
>>Resource resource = selector.select( hint );
>>
>>The hint can be any object (a Locale object if you wish, or any string).
>>
>
> This means that I need to write my own selector for that?
If you are using the ExcaliburComponentManager, then no. It is taken care
of by the configuration file. For example:
<resources>
<xml name="foo" file="/over/there.xml"/>
<file name="bar" rootdir="/over/here"/>
<file name="baz" rootdir="/over/hill"/>
<xml name="blah" file="/over/dale.xml"/>
</resources>
(with the proper entries in RoleManager) will allow you to get the resources
with the hint matching the name in the configuration file.
--
"They that give up essential liberty to obtain a little temporary safety
deserve neither liberty nor safety."
- Benjamin Franklin
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To unsubscribe, e-mail: <ma...@jakarta.apache.org>
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RE: componentmanager and looking up different implementations of the same role
Posted by Neeme Praks <ne...@apache.org>.
> -----Original Message-----
> From: Berin Loritsch [mailto:bloritsch@apache.org]
> Sent: Thursday, December 27, 2001 8:24 PM
>
> ComponentSelector. ComponentSelector was designed for this purpose.
>
> Per the Developer's docs, if you use a selector, append the "Selector"
> designator to the role name:
>
> ComponentSelector selector = (ComponentSelector) manager.lookup(
> Resource.ROLE + "Selector" );
> Resource resource = selector.select( hint );
>
> The hint can be any object (a Locale object if you wish, or any string).
This means that I need to write my own selector for that?
Neeme
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Re: componentmanager and looking up different implementations of the same role
Posted by Berin Loritsch <bl...@apache.org>.
Neeme Praks wrote:
> I have the following issue: can I ask the componentmanager to lookup a
> component by the "shorthand" name?
No. That is not it's purpose, nor should it ever be used in that manner.
> I need to have more than one implementation of the same role, and I need to
> somehow look up those different implementations. Any other way to achieve
> that?
ComponentSelector. ComponentSelector was designed for this purpose.
Per the Developer's docs, if you use a selector, append the "Selector"
designator to the role name:
ComponentSelector selector = (ComponentSelector) manager.lookup( Resource.ROLE + "Selector" );
Resource resource = selector.select( hint );
The hint can be any object (a Locale object if you wish, or any string).
>
> (I'm in the middle of another round of refactoring the i18n stuff :-))
>
> Rgds,
> Neeme
>
>
> --
> To unsubscribe, e-mail: <ma...@jakarta.apache.org>
> For additional commands, e-mail: <ma...@jakarta.apache.org>
>
> .
>
>
--
"They that give up essential liberty to obtain a little temporary safety
deserve neither liberty nor safety."
- Benjamin Franklin
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