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CDI extension for Java EE 8 application using Apache Kafka as Event Store

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package net.osomahe.esk;

import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Logger;

import javax.enterprise.event.Observes;
import javax.enterprise.inject.spi.AfterDeploymentValidation;
import javax.enterprise.inject.spi.BeanManager;
import javax.enterprise.inject.spi.Extension;
import javax.enterprise.inject.spi.ProcessObserverMethod;

import net.osomahe.esk.eventstore.entity.EventStoreEvent;
import net.osomahe.esk.eventstore.entity.EventSubscription;


/**
 * Kafka event store extension. Handles subscription to for events which are observed.
 *
 * @author Antonin Stoklasek
 */
public class EventStoreExtension implements Extension {
    private static final Logger logger = Logger.getLogger(EventStoreExtension.class.getName());

    private final List> events = new ArrayList<>();

    /**
     * Processes observation of events extended from {@link EventStoreEvent}.
     * Puts found events to list of events for later subscription.
     *
     * @param processObserverMethod process observer object
     */
    public void processObserverMethod(@Observes final ProcessObserverMethod processObserverMethod) {
        Method method = processObserverMethod.getAnnotatedMethod().getJavaMember();
        Class eventClass = (Class) method.getParameterTypes()[0];
        events.add(eventClass);
        logger.info("Found event: " + eventClass);
    }

    /**
     * After deployment method which fires events, what event should the subscription happened.
     *
     * @param afterDeploymentValidation hook for after deployment validation stage
     * @param beanManager bean manger
     */
    public void afterDeploymentValidation(@Observes final AfterDeploymentValidation afterDeploymentValidation, final BeanManager beanManager) {
        events.forEach(eventClass -> {
            beanManager.fireEvent(new EventSubscription(eventClass));
        });
    }
}