如何将 GWTP 与 ginjector 扩展一起使用？

Question

我有一个移动文件：

<extend-configuration-property name="gin.ginjector.extensions" value="test.client.gin.ClientInjectorAdditional"/>

我的 ClientInjectorAdditional 是：

public interface ClientInjectorAdditional extends Ginjector {


    NotificationFetcher getNotificationFetcher();

}

现在我想在我的入口点类中注入 NotificationFetcher。我试过了

public class Test implements EntryPoint {

    private static final ApplicationController controller = GWT.create(ApplicationController.class);

    @Inject
    private NotificationFetcher notificationFetcher;

    @Override

    public void onModuleLoad() {
        controller.init(;
    ...

    }
}

问题是notificationFetcher 没有被注入。

如何将 GWTP 与 ginjector 扩展一起使用？

编辑：

当我使用时

 private final ClientInjectorAdditional injector = GWT.create(ClientInjectorAdditional.class);

我收到以下警告：

  No gin modules are annotated on Ginjector interface test.client.gin.ClientInjectorAdditional, did you forget the @GinModules annotation?

编辑：

我试过了：

@GinModules({ ClientModule.class }) 公共接口 ClientInjectorAdditional 扩展 Ginjector { ... }

但这会产生以下错误：

[DEBUG] [test] - Rebinding test.client.gin.ClientInjectorAdditional
    [DEBUG] [test] - Invoking generator com.google.gwt.inject.rebind.GinjectorGenerator
        [ERROR] [test] - Error injecting com.gwtplatform.dispatch.rest.client.ActionMetadataProvider: Unable to create or inherit binding: No @Inject or default constructor found for com.gwtplatform.dispatch.rest.client.ActionMetadataProvider
  Path to required node:

com.gwtplatform.dispatch.rest.client.RestRequestBuilderFactory [com.gwtplatform.dispatch.rest.client.gin.RestDispatchAsyncModule.configureDispatch(RestDispatchAsyncModule.java:99)]
 -> com.gwtplatform.dispatch.rest.client.DefaultRestRequestBuilderFactory [com.gwtplatform.dispatch.rest.client.gin.RestDispatchAsyncModule.configureDispatch(RestDispatchAsyncModule.java:99)]
 -> com.gwtplatform.dispatch.rest.client.ActionMetadataProvider [@Inject constructor of com.gwtplatform.dispatch.rest.client.DefaultRestRequestBuilderFactory]

        [ERROR] [test] - Error injecting com.gwtplatform.dispatch.rest.client.serialization.JacksonMapperProvider: Unable to create or inherit binding: No @Inject or default constructor found for com.gwtplatform.dispatch.rest.client.serialization.JacksonMapperProvider
  Path to required node:

com.gwtplatform.dispatch.rest.client.serialization.Serialization [com.gwtplatform.dispatch.rest.client.gin.RestDispatchAsyncModule.configureDispatch(RestDispatchAsyncModule.java:103)]
 -> com.gwtplatform.dispatch.rest.client.serialization.JsonSerialization [com.gwtplatform.dispatch.rest.client.gin.RestDispatchAsyncModule.configureDispatch(RestDispatchAsyncModule.java:103)]
 -> com.gwtplatform.dispatch.rest.client.serialization.JacksonMapperProvider [@Inject constructor of com.gwtplatform.dispatch.rest.client.serialization.JsonSerialization]

[ERROR] [test] - Deferred binding failed for 'test.client.gin.ClientInjectorAdditional'; expect subsequent failures
[ERROR] [test] - Failed to create an instance of 'test.client.test' via deferred binding 
[ERROR] [test] - Unable to load module entry point class test.client.test (see associated exception for details)
[ERROR] [test] - Failed to load module 'test' from user agent 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.152 Safari/537.36' at http-server.fritz.box:61196

Answer 1

GWTP 使用它的所有演示者和视图获取器自动创建 ginjector。 它还支持为非 GWTP 对象扩展这个 ginjector。 这是你的做法：

一个。定义一个接口，我们将其命名为 GinjectorExtensions 包中的 some.package.client

package some.package.client;

public interface GinjectorExtensions {
    //your objects here
    MyConstants getMyConstants();  
    MyMessages MyMessages();
    MyRequestFactory getRequestFactory(); 
}

b.编辑您的 GWT 模块 xml 文件以包含以下行（告诉 GWTP 将您的代码行添加到它的 autogen Ginjector）：

   <set-configuration-property name="gin.ginjector.extensions"
                              value="some.package.client.GinjectorExtensions"/> 

然后你只需在任何地方@Inject 你的对象，一切都会按预期工作。

编辑：查看您的代码后，只需从 ClientInjectorAdditional 中删除“extends Ginjector”即可，一切正常。

Answer 2

这是直接来自Gin Tutorial的示例代码：

请找出差异：

• gwt.xml

    <inherits name="com.google.gwt.inject.Inject"/>
  

• MyWidgetClientModule.java

  import com.google.gwt.inject.client.AbstractGinModule;
  import com.google.inject.Singleton;
  
  public class MyWidgetClientModule extends AbstractGinModule {
      protected void configure() {
          bind(MyWidgetMainPanel.class).in(Singleton.class);
      }
  }
  

• MyWidgetGinjector.java

  import com.google.gwt.inject.client.GinModules;
  import com.google.gwt.inject.client.Ginjector;
  
  @GinModules(MyWidgetClientModule.class)
  public interface MyWidgetGinjector extends Ginjector {
      MyWidgetMainPanel getMainPanel();
  }
  

• MyWidgetMainPanel.java

  import com.google.gwt.user.client.ui.Button;
  
  public class MyWidgetMainPanel extends Button {
  
  }
  

• EntryPoint.java

  private final MyWidgetGinjector injector = GWT.create(MyWidgetGinjector.class);
  
  public void onModuleLoad() {
  
      MyWidgetMainPanel mainPanel = injector.getMainPanel();
      mainPanel.setText("Hi");
      RootPanel.get().add(mainPanel);
  
  }
  

Answer 3

更简单的解决方案是在构造函数中注入Provider<NotificationFetcher>，然后每次要实例化NotificationFetcher 时调用provider.get()。无需定义额外的依赖项（如 Ginjector 等）。