This is Third  part of CDI discussion.Please visit first part and part two,

In part two we seen @qualifier 's to resolve the unambiguous problem for one interface and more than on implementation. In qualifier helps to solve in development time. (i.e all meta information is stored in class files).
Another solution is @Alternative annotation solve the problem in deployment time. all configuration is stored in beans.xml in WEB-INF folder

We take same example what we discussed in last part 

one interface (Hello) and two implementation(HelloImplOne, HelloImplTwo)
here i marked @Alternative in both implementation

Hello Interface

HelloImplOne Implementation

HelloImplTwo Implementation

and go and modify the beans.xml in WEB_INF folder

In <alternatives> tag in beans.xml we need specify which one need to inject.

See the screen cast for demo

Comments are welcomed