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Component Installation
LightGuard edited this page Feb 11, 2012
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Seam 2 offers the @Install annotation for controlling whether a given bean should be installed or not. The following concepts are supported and can be configured using the annotation:
- explicit prevention from installation
- installation dependencies
- bean selection based component ordering (precedence)
The CDI specification itself does not define a single replacement for all the functionality represented by the @Install annotation. Instead, the concepts are implemented separately.
| Concept | Seam 2 | CDI |
|---|---|---|
| explicit prevention from installation | @Install(false) |
No annotation, however, an extension can observe the ProcessAnnotatedType event and call the veto() method. |
| installation dependencies | @Install(dependencies = “foo”) |
No match |
| bean selection based component ordering (precedence) | @Install(precedence = MOCK) |
@Specializes |