MyExtension.java

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package test.extension;

import javax.enterprise.event.Observes;
import javax.enterprise.inject.spi.AfterBeanDiscovery;
import javax.enterprise.inject.spi.BeanManager;
import javax.enterprise.inject.spi.BeforeBeanDiscovery;
import javax.enterprise.inject.spi.Extension;
import javax.enterprise.inject.spi.ProcessAnnotatedType;

import test.beans.DuplicateTestBean;

public class MyExtension implements Extension{
    public static boolean beforeBeanDiscoveryCalled = false;
    public static boolean afterBeanDiscoveryCalled = false;
    public static boolean processAnnotatedTypeCalled = false;
    public MyExtension(){
        System.out.println("In MyExtension ctor");
        //new Throwable().printStackTrace();
    }
    
    void beforeBeanDiscovery(@Observes BeforeBeanDiscovery bdd){
        System.out.println("MyExtension::beforeBeanDiscovery" + bdd);
        beforeBeanDiscoveryCalled = true;
    }
    
    <T> void processAnnotatedType(@Observes ProcessAnnotatedType<T> pat){
        System.out.println("MyExtension:Process annotated type" + pat.getAnnotatedType().getBaseType());
        processAnnotatedTypeCalled = true;
        //Vetoing the processing of DuplicateTestBean
        //If this is not vetoed, at the InjectionPoint in Servlet, there would be
        //an ambiguous dependency due to TestBean and DuplicateTestBean
        if (pat.getAnnotatedType().getBaseType().equals(DuplicateTestBean.class)){
            pat.veto();
        }
    }
    
    void afterBeanDiscovery(@Observes AfterBeanDiscovery abd, BeanManager bm){
        System.out.println("MyExtension: abd: " + abd + " BeanManager: " + bm);
        
        if (bm != null) {
            //ensure a valid BeanManager is injected
            afterBeanDiscoveryCalled = true;
        }
    }
}