[GitHub] [dubbo] kylixs commented on issue #9126: Dubbo 3.0 Filter 中 获取Spring Bean 的问题。

[GitBox <gi...@apache.org>]

kylixs commented on issue #9126:
URL: https://github.com/apache/dubbo/issues/9126#issuecomment-955632726


   > 原有的 ExtensionFactory ：ExtensionLoader.getExtensionLoader(ExtensionFactory.class).getAdaptiveExtension(); 方法已经废弃，请问新的方法是哪个呢？是否能给出示例？
   
   3.0.3 Dubbo支持多应用实例后，ExtensionLoader也相应的支持多实例，改成通过SPI对应ScopeModel( ApplicationModel/ModuleModel/FrameworkModel) 获取ExtensionLoader。
   
   如Application层的一个SPI：
   ```java
      @SPI(scope = ExtensionScope.APPLICATION)
      public interface  FooSPI {
          ...
      }
   ```
   
   1、加载SPI实例：
   ```java
      ApplicationModel  applicataionModel = ...;
      applicataionModel.getExtensionLoader(FooSPI.class).getAdaptiveExtension();
   ```
   
   2、一般是通过上下文获取到ScopeModel，如：
   1) URL.getScopeModel()
   2) SPI 的构造函数注入
   ```java
      public class MyFooSPI implements FooSPI  {
          public MyFooSPI ( ApplicationModel  applicataionModel ) {
             ...
          }
      }
   ```
   3) DubboBootstrap
   4) Spring ApplicationContext 
   ```
   DubboBeanUtils.getApplicationModel(applicationContext);
   DubboBeanUtils.getModuleModel(applicationContext);
   ```


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