Web Service: SOAP

Why Dependency Injection?
using dependency injection to inject EJBs gives the container a lot of flexibility to manage instance pools, reactivation of passivated instances, etc. -- professor duggan.

Enterprise JavaBeans (EJB) is a managed, server-side component architecture for modular construction of enterprise applications.

Example

The following shows a basic example of what an EJB looks like in code:

@Stateless 
public class CustomerService { 
 
  @PersistenceContext 
  private EntityManager entityManager; 
 
  public void addCustomer(Customer customer) { 
    entityManager.persist(customer); 
  } 
}