Question

我需要在contextInitialized方法中添加什么才能正确初始化对象图？

鉴于这个匕首模块：

@Module
public class MapperModule {

    @Provides
    @Singleton
    ObjectMapper provideObjectMapper() {
        return new ObjectMapper();
    }

}

ServletContextListener的这个子类：

public class DaggerDi implements ServletContextListener {

    @Override
    public void contextInitialized(ServletContextEvent sce) {
        ObjectGraph objectGraph = ObjectGraph.create(new MapperModule());                
     }

    @Override
    public void contextDestroyed(ServletContextEvent sce) {

    }

}

和web.xml

<web-app>
  <display-name>Archetype Created Web Application</display-name>
   <listener>
    <listener-class>
             com.me.config.DaggerDi
        </listener-class>
   </listener>
</web-app>

Answer 1

您可以查看this dagger-servlet project，我还没有尝试过，但看起来很简单，您必须：

配置servlet（web.xml文件）：

<web-app>
    <listener>
        <listener-class>com.example.MyServletContextListener</listener-class>
    </listener>
    <filter>
        <filter-name>Dagger Filter</filter-name>
        <filter-class>com.leacox.dagger.servlet.DaggerFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>Dagger Filter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
</web-app>

实现上下文侦听器和模块：

@Module（injects = {...}，includes = ServletModule.class）公共类MyModule {}

@Module（injects = {...}，includes = ServletRequestModule.class）公共类MyRequestModule {}

public class MyServletContextListener extends DaggerServletContextListener { @覆盖 protected Class [] getBaseModules（）{ return new Class [] {MyModule.class}; }
```
@Override
protected Class<?>[] getRequestScopedModules() {
    return new Class<?>[]{MyRequestModule.class};
}
```
}

问候！

如何使用匕首初始化Web应用程序？

1 个答案: