Hi Guice Gurus,
I am gradually introducing DI withGuice 2.x in my application. I am
hit upon a problem for which I hope you might be able to help me.
public class Service {
private final String serviceType;
@Inject
public Service(String serviceType) {
this.serviceType = serviceType;
}
@Inject
private Dao myDao;
// Setter and getter for Dao.
}
The service is called directly from the delegate which accesses the
injector configured using Guice's ServletContextListener. One of the
Module (ServiceModule) explicitly binds the string as follows
public class ClientTypeModule {
@Override
protected void configure() {
bind(String.class).toInstance("CRV_CLIENT_TYPE");
}
}
My issue is that there can be other potential values for the
serviceType. To get around that, I thought I would use child injectors
in my code that invokes this instance.
public class Delegate {
@Inject
private Service service
// Settter for Service.
private final Injector injector;
@Inject
public class Delegate(Injector injector) {
this.injector = injector;
}
public void callService() throws DelegateException {
Injector childInjector = injector.createChildInjector(new
ClientTypeModule()).injectMembers(this);
try {
service.doFoo();
} catch (DaoException de) {
throw new DelegateException();
}
}
}
I find that I am unable to mock Service instance to throw
DaoException to test exception handling as my mock is overridden by
child injector. Is there a work around for this that any one can
suggest? Any suggestion would be appreciated.
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