ejb-to-cdi

name	ejb-to-cdi
description	Migrates EJB components to CDI managed beans.

EJB to CDI Migration

When migrating from Java EE to Jakarta EE or Quarkus, replace Enterprise JavaBeans (EJB) with CDI managed beans.

Rules

1. Replace @Stateless with @ApplicationScoped.
2. Replace @Stateful with @SessionScoped or @ApplicationScoped depending on the use case.
3. Replace @Singleton (javax.ejb) with @ApplicationScoped + @Startup if initialization is needed.
4. Remove @LocalBean and @Local — CDI beans are local by default.
5. Replace @EJB injection with @Inject.
6. Replace JNDI lookups with CDI @Inject or programmatic lookup via CDI.current().select(...).
7. Replace @Schedule (EJB Timer) with Quarkus @Scheduled or jakarta.enterprise.concurrent scheduled executors.
8. Replace @MessageDriven with framework-specific messaging (e.g., Quarkus SmallRye Reactive Messaging with @Incoming).

Examples

Before:

@Stateless
public class OrderService {
    @EJB
    private InventoryService inventory;

    public void processOrder(Order order) {
        inventory.reserve(order.getItems());
    }
}

After:

@ApplicationScoped
public class OrderService {
    @Inject
    InventoryService inventory;

    public void processOrder(Order order) {
        inventory.reserve(order.getItems());
    }
}