Hello All,
I am a newbie in merlin and avalon. I am trying to understand concepts of Merlin. I
read the article 'Developing with Avalon'. I read in that article about cofigure
services and components. It looks like this -
<component role="org.apache.bizserver.docs.DocumentRepository"
class="org.apache.bizserver.docs.DatabaseDocumentRepository">
<dbpool>documents</dbpool>
</component>
When I see this config, I realize at least that DatabaseDocumentRepository has to
implement DocumentRepository as I understand.
Why now you've removed description about services wich component provides from
block.xml ? Because now when I look at block.xml, it doesn't describe structure of
application or components. For example now I can write
<container name="tutorial">
<component name="hello" class="tutorial.HelloComponent"/> <!-- just component
nothing about service which it supported -->
<component name="second" class="tutorial.SecondComponent"/> <!-- another
component and suppose it supports the same service but I cann't say it when I read
this config -->
</container>
I suppose that if we would add an optional field 'role' then the config only wins from
it. For example
<container name="tutorial">
<component name="hello" role="tutorial.Hello" class="tutorial.HelloComponent"/>
<!-- first implementation of Hello service-->
<component name="second" role="tutorial.Hello" class="tutorial.SecondComponent"/>
<!-- another implementation of Hello service-->
</container>
and if the field 'role' present then the component "tutorial.HelloComponent" has to
implement "tutorial.Hello" service. I know that this information presents in .xinfo
but these files are in many different directories, so it doesn't comfortable to use
them for view components services or something.
So I think that in this way block.xml would be more descriptive for an application
structure.
Regards,
Yura Ivanov.
