#Specializes in Wildfly 10.1.0 - cdi

Question

We are trying to use alternative bean instance injection for our integration test suite deployed on a Wildfly 10.1.0 server.
According to the CDI 1.2 spec, a possible solution to do so would be to use the #Specializes annotation on an alternative deployed in the integration test archive only.
However, the default implementation is always injected. We tried #Specializes on managed beans, session beans, and tried to select the alternatives in the beans.xml file.
The following example illustrate the issue:
BeanInterface.java
public interface BeanInterface {
void work();
}
Implementation1.java
#Dependent
public class Implementation1 implements BeanInterface {
#Override
public void work() {
System.out.println("test 1");
}
}
Implementation2
#Dependent
#Alternative
#Specializes
public class Implementation2 extends Implementation1 {
#Override
public void work() {
System.out.println("test 2");
}
}
TestSingleton.java:
#Singleton
#Startup
public class TestSingleton {
#Inject
private BeanInterface beanInterface;
#PostConstruct
public void init() {
this.beanInterface.work();
}
}
Packaging these classes in a war (with a web.xml) and deploying on wildfly, the implementation 1 is always injected in the Stateless bean.
Wildfly 10.1.0 uses weld-2.3.SP2 which implements CDI 1.2.
Thanks,
Charly

Answer 1

Although it does not make the #Specializes annotation work as expected, this solution suggested by John Ament allows to inject the second Implementation.
Just change the #javax.enterprise.inject.Specializes annotation with #javax.annotation.Priority (and some value):
#Dependent
#Alternative
#Priority(100)
public class Implementation2 extends Implementation1 {
#Override
public void work() {
System.out.println("test 2");
}
}
Also missing in the OP question was the beans.xml (not web.xml) packaged in the WEB-INF:
<?xml version="1.0" encoding="UTF-8"?>
<beans
xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
http://xmlns.jcp.org/xml/ns/javaee/beans_1_1.xsd"
bean-discovery-mode="all">
</beans>