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## 自定义限流处理逻辑
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1. URL 限流触发后默认处理逻辑是,直接返回 "Blocked by Sentinel (flow limiting)"。
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* 默认限流异常处理
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URL 限流触发后默认处理逻辑是,直接返回 "Blocked by Sentinel (flow limiting)"。
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如果需要自定义处理逻辑,实现的方式如下:
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```java
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WebCallbackManager.setUrlBlockHandler(new CustomUrlBlockHandler());
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```
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2. 自定义限流触发后,默认的处理逻辑是抛出异常。
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* 使用 `@SentinelResource` 注解下的限流异常处理
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如果需要自定义处理逻辑,填写 `@SentinelResource` 注解的 `blockHandler` 属性(针对所有类型的 `BlockException`,需自行判断)或 `fallback` 属性(针对熔断降级异常),注意**对应方法的签名和位置有限制**,详情见 [Sentinel 注解支持文档](https://github.com/alibaba/Sentinel/wiki/%E6%B3%A8%E8%A7%A3%E6%94%AF%E6%8C%81#sentinelresource-%E6%B3%A8%E8%A7%A3)。示例实现如下:
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@ -172,7 +174,7 @@ public final class ExceptionUtil {
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}
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```
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一个简单的示例可以见 [sentinel-demo-annotation-spring-aop](https://github.com/alibaba/Sentinel/tree/master/sentinel-demo/sentinel-demo-annotation-spring-aop)。
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一个简单的 `@SentinelResource` 示例可以见 [sentinel-demo-annotation-spring-aop](https://github.com/alibaba/Sentinel/tree/master/sentinel-demo/sentinel-demo-annotation-spring-aop)。
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## Endpoint 信息查看
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@ -108,7 +108,9 @@ The screenshot belows shows invoke success:
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## Customize Flow Control Logic
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1. When a URL resource is blocked by Sentinel, the default logic is return HTTP response "Blocked by Sentinel (flow limiting)".
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* Flow control exception handle by default
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When a URL resource is blocked by Sentinel, the default logic is return HTTP response "Blocked by Sentinel (flow limiting)".
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If you want to customize your flow control logic, see the code below:
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WebCallbackManager.setUrlBlockHandler(new CustomUrlBlockHandler());
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2. When a custom resource is blocked by Sentinel, the default logic is throw BlockException.
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* Flow control exception handle by using `@SentinelResource`
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When a custom resource is blocked by Sentinel, the default logic is throw BlockException.
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If you want to customize your flow control logic, implement interface `SentinelExceptionHandler`, set @SentinelResource's blockHandler() and blockHandlerClass(). See the code below:
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