PersistenceService not found. No bindings to that type were found

[Kelly Davis]

I am trying to try to warp persist with jpa. I have the following:

public class InitializerJpa
{
private final Log log = LogFactory.getLog( getClass());

private final PersistenceService service;

@Inject
InitializerJpa(PersistenceService service)
{
this.service = service;
service.start();
log.info("JPA Persistence Service started...");
}
}

public class ServiceModule extends AbstractModule
{
@Override
protected void configure()
{
bindConstant().annotatedWith(JpaUnit.class).to("DLXPU");
bind(InitializerJpa.class).asEagerSingleton();
}
}

public class Main
{
public static void main( String[] args )
{
Injector injector = Guice.createInjector(new ServiceModule(),
PersistenceService.usingJpa().across(UnitOfWork.TRANSACTION).buildModule());

Main main = injector.getInstance(Main.class);
main.go();
}
}

When I run Main, I get the following exception:

Exception in thread "main" com.google.inject.CreationException: Guice
configuration errors:

1) Error at
edu.duke.fuqua.dlx.util.InitializerJpa.<init>(InitializerJpa.java:25):
Binding to com.wideplay.warp.persist.PersistenceService not found. No
bindings to that type were found.

1 error[s]
at com.google.inject.BinderImpl.createInjector(BinderImpl.java:
465)
at com.google.inject.Guice.createInjector(Guice.java:96)
at com.google.inject.Guice.createInjector(Guice.java:69)
at com.google.inject.Guice.createInjector(Guice.java:59)
at test.Main.main(Main.java:171)

I am trying to follow the sample code pretty closely, so I am having
trouble getting an understanding of why this is happening. It looks
like there isn't a binding for PersistenceService, but none of the
examples show the a binding needs to be set in the user defined
module, so I am assuming it happens in the module created by
PersistenceService when I create the Injector. The only thing that may
be different is that I am using a recent snapshot of guice.

Thanks,

Kelly

[Dhanji R. Prasanna]

Hi Kelly

No you certainly don't need to bind PersistenceService yourself, it
should be available to the injector once you pass in the module from
PersistenceService.usingJpa()..buildModule(). I'm not sure I can tell
what is happening from the code you have--can you post the entire Main
class including the go() method?

I tried this quick and dirty test and it worked for me:

injector = Guice.createInjector(
new AbstractModule() {

protected void configure() {
//tell Warp the name of the jpa persistence unit

bindConstant().annotatedWith(JpaUnit.class).to("testUnit");
}
},
PersistenceService.usingJpa()
.across(UnitOfWork.TRANSACTION)
.transactedWith(TransactionStrategy.LOCAL)
.buildModule());

//startup persistence
injector.getInstance(PersistenceService.class)
.start();

There isn't anything different here to your code, semantically. So I'm
not sure what it is. I even tried a version with the InitializerJpa
exactly as you have it. One thing you could try is looking at the
warp-persist unit tests and compare if you are doing anything
differently?

As you say it may be the newer snapshot of Guice, I will grab it and
re-test to make sure. To be on the safe side, can you try it with
Guice 1.0? The latest source versions appear to be unstable..

Dhanji.

[Kelly Davis]

Hi Dhanji, Thanks for your reply. I switched back to Guice 1.0 and it
worked. Thanks for your help, Kelly