Google Guice桌面应用程序 - 如何使其工作？ [英] Google Guice desktop application - how to make it work?

问题描述

我在我的网络应用中使用过Guice而没有任何问题，我想在桌面应用中使用它。我当然缺少一件事 - 某种方式告诉我的应用程序如何绑定所有内容并知道什么是什么。在Web应用程序中，我在Application类中声明了这一点，我应该如何在桌面应用程序中执行此操作？

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?

这是我正在使用的相关代码：

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);
 }

我的主要课程：

@Inject
public Repository<Project> projectRepo;

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

我当然正在使用projectRepo.persist（newProject）;

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

那么，我还需要做些什么才能让它发挥作用？

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

编辑：

好的，那个部分现在正常工作，谢谢:)似乎我需要做更多的事情来使持久性工作那样。

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

我现在在这里获得NPE：

I am getting NPE here now:

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

get（）在此返回null

get() returns null here

看起来像
install（new PersistenceManagerFilter.GuiceModule（））;
是不够的。我需要做什么？ My Repository类以以下内容开头：

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; 
} 

在我的PMF我有：

public static class GuiceModule extends AbstractModule { 

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

推荐答案

创建带有main方法的 Bootstrap 类。

Create Bootstrap class with main method.

将当前的静态主方法代码移动到非静态方法代码。例如 Application＃run 。

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

在 Bootstrap中创建main方法 class：

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

运行 Bootstrap 类。

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