You're probably getting this error because you haven't called
install(new JpaPersistModule("eventosImpa"));
before binding any other classes that require an EntityManager. Just
move it to the top of your configure() method:
See "Web Environments" in:
http://code.google.com/p/google-guice/wiki/JPA
On 4 July 2011 01:06, Gabriel Cardelli
<[email protected]> wrote:
> I'm trying execute Guice + JPA but i get an error:
>
> com.google.inject.ProvisionException: Guice provision errors:
>
> 1) Error in custom provider, java.lang.NullPointerException
> while locating com.google.inject.persist.jpa.JpaPersistService
> while locating javax.persistence.EntityManager
>
>
> public class GuiceServletConfig extends GuiceServletContextListener {
>
> @Override
> protected Injector getInjector() {
> Injector i = Guice.createInjector(new ServletModule() {
>
> @Override
> protected void configureServlets() {
> // Bind classes
> bind(PerRequestResource.class);
> bind(EventoWS.class);
> bind(EventoService.class).to(EventoServiceImpl.class);
> bind(EventoDAO.class).to(EventoDAOImpl.class);
> bind(Principal.class).toProvider(PrincipalProvider.class);
> bind(SecurityContext.class).to(MySecurityContext.class);
>
> install(new JpaPersistModule("eventosImpa"));
> serve("/*").with(GuiceContainer.class);
>
>
> }
> });
>
>
> return i;
> }
> }
>
> DAO:
>
> public class EventoDAOImpl implements EventoDAO {
>
> private final transient Logger log =
> Logger.getLogger(EventoDAOImpl.class);
>
>
> @Inject private Provider<EntityManager> entityManager;
>
> public EntityManager save(Evento object) {
> return entityManager.get();
> }
>
> }
>
> The method save return an error.
>
> Thnks
>
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