Florian Brunner created FELIX-4831:
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Summary: Simplify the declaration of capabilities
Key: FELIX-4831
URL: https://issues.apache.org/jira/browse/FELIX-4831
Project: Felix
Issue Type: Improvement
Components: Maven Bundle Plugin
Affects Versions: maven-bundle-plugin-2.5.3
Reporter: Florian Brunner
Declaring capabilities is currently rather cryptic. It requires a specific
syntax, which I believe is hard to remember for non-OSGi experts.
E.g. to provide a CDI extension using PAX-CDI you would need something like
this:
<Provide-Capability>
org.ops4j.pax.cdi.extension; extension=my-extension
</Provide-Capability>
To require the CDI extension you would need something like this:
<instructions>
<Require-Capability>
osgi.extender; filter:="(osgi.extender=pax.cdi)",
org.ops4j.pax.cdi.extension; filter:="(extension=my-extension)"
</Require-Capability>
</instructions>
The proposed solutions consists of 3 parts:
- a new property for the bundle goal of the Maven Bundle Plugin:
instructionsFile
This property defines a properties file containing additional BND instruction
to take into consideration when executing the goal
- a annotation library, which provides annotations for declaring BND
instructions
- a custom annotation processor, which generates the instructionsFile from the
annotations
This approach would:
- guide the developer what to specify
- doesn't require the developer to know the exact syntax
- helps avoiding typos
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