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gRPC 拦截器顺序的设置 #8

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jxlwqq opened this issue May 22, 2022 · 0 comments

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jxlwqq commented May 22, 2022 •

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各个拦截器的放置顺序就显得非常重要，比如为啥 panic 拦截器要放在第一个位置？如果放在后面的位置，那么假设前面拦截器运行过程中发生了 panic，就无法捕获到异常了。同理，需要对错误进行处理的拦截器，如果放置的位置不合适，获取不到相关的错误，那么该拦截器就无意义了（比如对于客户端的 breaker 熔断 / 超时重试 / 参数检查拦截器的位置，一般而言，是按照先检查输入参数 -> 熔断拦截器 -> 超时重试的顺序，因为熔断需要检查超时错误，但是对于参数校验错误就不关心）

https://pandaychen.github.io/2019/11/23/GRPC-INTERCEPTOR-APPLY/

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