darknesstm opened a new issue #1710: 扩展点自动激活的文档说明和代码不一致 URL: https://github.com/apache/incubator-dubbo/issues/1710 代码如下： > /dubbo-common/src/main/java/com/alibaba/dubbo/common/extension/ExtensionLoader.java ```java private boolean isMatchGroup(String group, String[] groups) { if (group == null || group.length() == 0) { return true; } if (groups != null && groups.length > 0) { for (String g : groups) { if (group.equals(g)) { return true; } } } return false; } ``` 当注解`@Activate`不设置任何属性的时候不可能被激活，因为这个方法中形参`groups`就是注解的值，为空数组时，返回false。 但是文档上却说 > https://dubbo.incubator.apache.org/books/dubbo-dev-book/SPI.html#fn_1 ```java import com.alibaba.dubbo.common.extension.Activate; import com.alibaba.dubbo.rpc.Filter; @Activate // 无条件自动激活 public class XxxFilter implements Filter { // ... } ```
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