AlexStocks commented on code in PR #3189: URL: https://github.com/apache/dubbo-go/pull/3189#discussion_r2767252342
########## metrics/rpc/error_classifier.go: ########## @@ -0,0 +1,68 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package rpc + +import ( + "dubbo.apache.org/dubbo-go/v3/protocol/triple/triple_protocol" +) + +// ErrorType represents the classification of RPC errors Review Comment: 在 RPC 系统中,使用 iota 定义错误码是一把双刃剑。代码在语法和可读性上是标准的 Go 风格,但在系统稳定性和向前兼容性方面存在潜在风险。 核心建议:在涉及跨服务通信时,建议使用固定值。 为什么 iota 在这里有风险? 序列化陷阱: RPC 的核心是服务间通信。如果你的 ErrorType 会被发送到网络(例如通过 Protobuf 或 JSON),那么数值的含义必须是永久固定的。 风险场景:如果你将来在 ErrorTypeTimeout 后面插入了一个新的错误类型,所有后续类型的数值都会自动加 1。如果客户端还没更新代码,它接收到的 2 以前代表 ErrorTypeLimit,现在可能代表了别的东西,直接导致逻辑错乱。 默认值混淆: 你正确地将 ErrorTypeUnknown 放在了 0 位(Go 的零值)。但如果使用 iota,开发者很容易手抖在最前面插入新项,导致 Unknown 不再是 0,这会破坏 Go 语言“零值即默认”的哲学。 日志与监控的碎片化: 如果你将这些数值存储在数据库或监控系统(如 Prometheus/ELK)中,iota 值的变动会导致历史数据无法追溯。去年的“错误 3”和今年的“错误 3”可能根本不是一回事。 ```go type ErrorType uint8 const ( // 保持 0 为未知错误,符合 Go 零值原则 ErrorTypeUnknown ErrorType = 0 ErrorTypeTimeout ErrorType = 1 ErrorTypeLimit ErrorType = 2 ErrorTypeServiceUnavailable ErrorType = 3 ErrorTypeBusinessFailed ErrorType = 4 // 为未来可能增加的类型预留空间,或者明确固定后续值 ErrorTypeNetworkFailure ErrorType = 10 ErrorTypeCodec ErrorType = 11 ) ``` -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
