[jira] [Created] (SIS-102) Choose a dependency injection library for SIS

["Martin Desruisseaux (JIRA)" <ji...@apache.org>]

Martin Desruisseaux created SIS-102:
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             Summary: Choose a dependency injection library for SIS
                 Key: SIS-102
                 URL: https://issues.apache.org/jira/browse/SIS-102
             Project: Spatial Information Systems
          Issue Type: Task
          Components: Utilities
            Reporter: Martin Desruisseaux


We need to choose a dependency injection mechanism (CDI). Johann Sorel provided the following analysis:

There is basically two overlapping Java Specification Requests (JSR):
* {{JSR-299}} is the complete CDI version ({{cdi-api}})
* {{JSR-330}} can be seen as a lightweight version of {{JSR-299}}. Whether this is an improvement appears questionable.

{{JSR-330}} provides only a limited amount of injection possibilities and does not provide discovery mechanism. Consequently it would not be a replacement for our current usage of {{META-INF/services}} entries. Google _Guice 3_ is a {{JSR-330}} implementation.

{{JSR-299}} is more complete and provides a discovery mechanism. _Weld 1_ is the reference implementation.

The next CDI version will be {{JSR-346}}, available as a draft at the time of writing. _Weld 2_ (available as beta-5) will be the reference implementation.

Recommendation is to wait for {{JSR-346}}. The difference with {{JSR-299}} seems small. This new JSR aims to brings "updates and clarifications to CDI 1.0 along much requested features".


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