multi-profiles in one minute

2012 spring added bean-profiles which is similar to project-stages added in myfaces-codi 2010. deltaspike improved and unified the project-stage concept. for the average case it's (imo) easier to handle than bean-profiles. however, from time to time users come up with some very special edge-cases which can be done with (custom) expressions supported by @Exclude. per definition such cases can get quite complex and usually there is an easier approach with deltaspike. in all the years (on the mailing-lists and in projects) i just saw one case which would really benefit a bit from the (imo) more complex bean-profiles approach. even in that case the result wasn't just "bad luck" and a questionable workaround as a result. instead it is possible to implements bean-profiles as a deltaspike-addon with less than 30 lines of code.

	public class MultiProfileExtension implements Extension {
	private Set<String> activeProfileNames = new HashSet<>();
	protected void determineActiveProfiles(@Observes BeforeBeanDiscovery beforeBeanDiscovery) {
	String activeProfileString =
	ConfigResolver.getPropertyValue("active-profiles", "Production");
	Collections.addAll(activeProfileNames, activeProfileString.split(","));
	}
	protected void matchActiveProfiles(@Observes ProcessAnnotatedType pat, BeanManager bm) {
	Set<Annotation> annotations = pat.getAnnotatedType().getAnnotations();
	Profile profile = AnnotationUtils.findAnnotation(
	bm, annotations.toArray(new Annotation[annotations.size()]), Profile.class);
	if (profile == null) {
	return;
	}
	for (String supportedProfile : profile.value()) {
	if (activeProfileNames.contains(supportedProfile)) {
	return;
	}
	}
	pat.veto();
	}
	}

view raw MultiProfileExtension.java hosted with ❤ by GitHub

the usage is quite simple.

	@Profile("X")
	//further cdi annotation/s
	public class BeanProfileX {
	}

view raw ProfileBeanX.java hosted with ❤ by GitHub

a type-safe approach based on cdi-stereotypes is supported as well. the usage of the type-safe approach is also straightforward:

	@ProfileA
	//further cdi-annotation/s
	public class BeanProfileA {
	}

view raw BeanProfileA.java hosted with ❤ by GitHub

	//...
	@Stereotype
	@Profile("A")
	public @interface ProfileA {
	}

view raw ProfileA.java hosted with ❤ by GitHub

enabling 1-n profiles can be done with any active config-source.
the implementation including tests are available at ds-multi-profile-addon.