'Bean does not have a public constructor that does not take parameters' error despite clearly having one?

Question

I have an EmailService EJB that has a very simple \'send_email\' method. I\'m receving the error in the title despite clearly having a public constructor that does not take para

Answer 1

I would prefer to annotate your constructor with @Inject instead:

@Stateless
@LocalBean
public class EmailService {

    ....
    @Deprecated
    public EmailService(){}       

    @Inject 
    public EmailService(ContextFinder ctf) { 
        username = (String) ctf.lookup(EMAIL_USERNAME_JNDI_NAME);
        password = (String) ctf.lookup(EMAIL_PASSWORD_JNDI_NAME);
        server = (String) ctf.lookup(SMTP_SERVER_JNDI_NAME);
        port = (Integer) ctf.lookup(SMTP_PORT_JNDI_NAME);
    }

...
}

>> Using @PostConstruct is not exactly the same as you had. init() method will not work outside the container like in JUnit test.

You still need to provide the default not parametrized constructor (part of the The EJB 3.1 spec, section 4.9.2 Bean Classes).