Question

I have used Guice in my web app without problems and I wanted to use it in desktop app. I am certainly missing one thing – some way to tell my app how to bind everything and know what is what. In web app, I had declaration for that in Application class, how should I do it in my desktop app?

Here is relevant code that I am using:

public class GuiceModule extends AbstractModule
{
   @Override
   protected void configure()
   {
   // Enable per-request-thread PersistenceManager injection.
   install(new PersistenceManagerFilter.GuiceModule());
   // Business object bindings go here.
   bind(ProjectQueries.class).to(JdoProjectQueries.class);
   bind(new TypeLiteral<Repository<Project>>() { }).to(JdoProjectRepository.class);
 }

My main class:

@Inject
public Repository<Project> projectRepo;

public void createNewProject() {
   ...
   projectRepo.persist(newProject);
}

I am of course getting on projectRepo.persist(newProject);

So, what else do I have to do to make it work?

EDIT:

Ok, that part work now, thanks 🙂 It seems that I need to do a bit more though to make persistence work that way.

I am getting NPE here now:

public void persist(T entity) 
{ 
pmProvider.get().makePersistent(entity); 
} 

get() returns null here

It looks like
install(new PersistenceManagerFilter.GuiceModule());
is not enough. What do I need to do? My Repository class starts with:

public abstract class JdoRepository<T> implements Repository<T> { 
  private final Class<T> clazz; 
  private final Provider<PersistenceManager> pmProvider; 
  protected JdoRepository(Class<T> clazz, Provider<PersistenceManager> pmProvider)    {       this.clazz = clazz; this.pmProvider = pmProvider; 
} 

At my PMF I have:

public static class GuiceModule extends AbstractModule { 

  @Override protected void configure() { 
    bind(PersistenceManager.class).toProvider(new Provider<PersistenceManager>() {
      public PersistenceManager get() { 
         return PersistenceManagerFilter.pm.get(); 
         } 
      }); 
    } 
   }

Answer 1

Create Bootstrap class with main method.

Move your current static main method code to non-static one. For example Application#run.

Create main method in Bootstrap class:

public static void main(String[] args) {
    Injector injector = Guice.createInjector(new GuiceModule())
    Application app = injector.getInstance(Application.class);
    app.run();
}

Run Bootstrap class.