Difference between "instance" and "provides"
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Key: FELIX-2815
URL: https://issues.apache.org/jira/browse/FELIX-2815
Project: Felix
Issue Type: Bug
Components: Felix Commons
Reporter: Andriyko
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
<instance>.
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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