adam bien's blog

Starting with Java EE 7, a CDI event:

package com.airhacks.events;

import javax.enterprise.event.Event;
import javax.inject.Inject;

public class MetaDataResource {

    @Inject
    Event<String> event;

    public void fire() {
        event.fire("hey duke");
    }

}

is delivered with injectable javax.enterprise.inject.spi.EventMetadata:

import javax.enterprise.event.Observes;
import javax.enterprise.inject.spi.EventMetadata;
import javax.enterprise.inject.spi.InjectionPoint;

public class Listener {

    public void onArrival(@Observes String event, EventMetadata metaData) {
        InjectionPoint ip = metaData.getInjectionPoint();
        Class clazz = ip.getMember().getDeclaringClass();
        String fieldName = ip.getMember().getName();
        System.out.println(clazz.getName() + "-> " + fieldName);
    }

}

The code creates the following output:

 com.airhacks.events.MetaDataResource-> event

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