Question

我有一个mobule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(;
    ...

    }
}

问题是没有注入notificationFetcher。

如何将GWTP与ginjector扩展程序一起使用？

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使用其所有演示者和视图getter自动创建ginjector。它还支持为非GWTP对象扩展此ginjector。这是你如何做到的：

一个。定义一个接口，让我们在包some.package.client

中命名为GinjectorExtensions

package some.package.client;

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

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

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

然后你只需@Inject你的对象，一切都应该按预期工作。

编辑：在审核完代码后，只需从ClientInjectorAdditional中删除“extends Ginjector”，一切都应该有效。

Answer 2

以下是直接来自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>，然后在每次要实例化NotificationFetcher时调用provider.get()。不需要定义额外的依赖（如Ginjector等）。

如何将GWTP与ginjector扩展一起使用？

3 个答案: