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8.2.12. About Portable Extensions
CDI is intended to be a foundation for frameworks, extensions and integration with other technologies. Therefore, CDI exposes a set of SPIs for the use of developers of portable extensions to CDI. Extensions can provide the following types of functionality:
- integration with Business Process Management engines
- integration with third-party frameworks such as Spring, Seam, GWT or Wicket
- new technology based upon the CDI programming model
According to the JSR-299 specification, a portable extension may integrate with the container in the following ways:
- Providing its own beans, interceptors and decorators to the container
- Injecting dependencies into its own objects using the dependency injection service
- Providing a context implementation for a custom scope
- Augmenting or overriding the annotation-based metadata with metadata from some other source
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