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From "Richard S. Hall (JIRA)" <j...@apache.org>
Subject [jira] Commented: (FELIX-2815) Difference between "instance" and "provides"
Date Mon, 07 Feb 2011 00:21:30 GMT

    [ https://issues.apache.org/jira/browse/FELIX-2815?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12991243#comment-12991243

Richard S. Hall commented on FELIX-2815:

This distinction is also discussed here: http://felix.apache.org/site/how-to-use-ipojo-factories.html

> Difference between "instance" and "provides"
> --------------------------------------------
>                 Key: FELIX-2815
>                 URL: https://issues.apache.org/jira/browse/FELIX-2815
>             Project: Felix
>          Issue Type: Bug
>          Components: iPOJO
>            Reporter: Andriyko
>            Assignee: Clement Escoffier
>              Labels: documentation, felix,, ipojo
> In the documentation on iPOJO Services:
> http://felix.apache.org/site/providing-osgi-services.html#ProvidingOSGiservices-Instancereconfiguration
> There is no clear explanation of what is the difference between <provides> and
> It is not clear why "instance" is needed at all.
> Under the "Service Properties" heading on the page, the two are used interchangeably
in the examples.
> For example, first "property" is configured with <provides>:
> <component classname="...FooProviderType1">
>             <provides>
>                         <property name="foo" field="m_foo" value="Foo"/>
>                         <property name="static" type="java.lang.String" value="this
is a static property"/>
>             </provides>
> </component>
> and then immediately, with no explanation what-so-ever and <intsance> is used,
with a tiny explanation that "The value can be given in the instance configuration":
> <instance component="...FooProviderType1">
>    <property name="foo" value="My New Foo Value"/>
>    <property name="static" value="My Value For Static"/>
> </instance>

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