Spring Cloud Feign 之日誌輸出

環境資訊: java 1.8、Spring boot 1.5.10.RELEASE、spring cloud-Edgware.SR3、maven 3.3+

在平時開發過程中少不了檢視日誌解決問題，一個好的框架日誌輸出是必不可少的，Feign也一樣

Feign日誌輸出說明

Feign的日誌是以下部分組成

1、Feign的Level日誌級別配置預設是:NONE，不要跟log日誌級別混淆

日誌級別列舉類 Logger.Level

NONE 不輸出日誌

BASIC 只有請求方法、URL、響應狀態程式碼、執行時間

HEADERS

FULL 請求和響應 的heads、body、metadata，建議使用這個級別

2、log日誌級別配置，預設是debug

使用指定Feign類會包名配置日誌列印級別

此處使用spring logging配置 比如列印 UserFeign logging.level.com.example.feign.UserFeign=debug

Feign日誌輸出-Logger.Level.FULL+log debug級別

全域性開啟方式 使用spring java config 配置，注意該類一定要放到spring可以掃描到的包下

/**
 * feign 配置
 * @author
 
: sunshaoping
 * @date: Create by in 下午4:07 2018/8/7
 */
@Configuration
public class FeignConfig {

    @Bean
    Logger.Level feignLevel() {
        return Logger.Level.FULL;
    }
}

application.properties 配置debug 日誌輸出級別

user.url=http://localhost:8080/user
logging.level.com.example.feign.UserFeign=debug

執行 UserFeignTest.save

2018-08-07 16:48:03.011 DEBUG 75661 --- [           main] com.example.feign.UserFeign              : [UserFeign#save] ---> POST http://localhost:8080/user HTTP/1.1
2018-08-07 16:48:03.011 DEBUG 75661 --- [           main] com.example.feign.UserFeign              : [UserFeign#save] Content-Type: application/json;charset=UTF-8
2018-08-07 16:48:03.011 DEBUG 75661 --- [           main] com.example.feign.UserFeign              : [UserFeign#save] Content-Length: 27
2018-08-07 16:48:03.011 DEBUG 75661 --- [           main] com.example.feign.UserFeign              : [UserFeign#save] 
2018-08-07 16:48:03.011 DEBUG 75661 --- [           main] com.example.feign.UserFeign              : [UserFeign#save] {"id":null,"name":"張三"}
2018-08-07 16:48:03.012 DEBUG 75661 --- [           main] com.example.feign.UserFeign              : [UserFeign#save] ---> END HTTP (27-byte body)
2018-08-07 16:48:03.041 DEBUG 75661 --- [           main] com.example.feign.UserFeign              : [UserFeign#save] <--- HTTP/1.1 200 (29ms)
2018-08-07 16:48:03.042 DEBUG 75661 --- [           main] com.example.feign.UserFeign              : [UserFeign#save] content-length: 0
2018-08-07 16:48:03.043 DEBUG 75661 --- [           main] com.example.feign.UserFeign              : [UserFeign#save] date: Tue, 07 Aug 2018 08:48:03 GMT
2018-08-07 16:48:03.043 DEBUG 75661 --- [           main] com.example.feign.UserFeign              : [UserFeign#save] 
2018-08-07 16:48:03.043 DEBUG 75661 --- [           main] com.example.feign.UserFeign              : [UserFeign#save] <--- END HTTP (0-byte body)

執行 UserFeignTest.getUserByID方法 可以看到以下查詢user詳情輸出的請求和響應日誌。

2018-08-07 16:48:03.045 DEBUG 75661 --- [           main] com.example.feign.UserFeign              : [UserFeign#getUserByID] ---> GET http://localhost:8080/user/5 HTTP/1.1
2018-08-07 16:48:03.046 DEBUG 75661 --- [           main] com.example.feign.UserFeign              : [UserFeign#getUserByID] ---> END HTTP (0-byte body)
2018-08-07 16:48:03.051 DEBUG 75661 --- [           main] com.example.feign.UserFeign              : [UserFeign#getUserByID] <--- HTTP/1.1 200 (4ms)
2018-08-07 16:48:03.051 DEBUG 75661 --- [           main] com.example.feign.UserFeign              : [UserFeign#getUserByID] content-type: application/json;charset=UTF-8
2018-08-07 16:48:03.051 DEBUG 75661 --- [           main] com.example.feign.UserFeign              : [UserFeign#getUserByID] date: Tue, 07 Aug 2018 08:48:03 GMT
2018-08-07 16:48:03.051 DEBUG 75661 --- [           main] com.example.feign.UserFeign              : [UserFeign#getUserByID] transfer-encoding: chunked
2018-08-07 16:48:03.051 DEBUG 75661 --- [           main] com.example.feign.UserFeign              : [UserFeign#getUserByID] 
2018-08-07 16:48:03.054 DEBUG 75661 --- [           main] com.example.feign.UserFeign              : [UserFeign#getUserByID] {"id":"5","name":"張三"}
2018-08-07 16:48:03.055 DEBUG 75661 --- [           main] com.example.feign.UserFeign              : [UserFeign#getUserByID] <--- END HTTP (26-byte body)

總結

此章節只介紹了feign自帶的日誌輸出配置方式，下面章節將詳細介紹其實現原理及自定義log 日誌級別輸出。

樣例地址 spring-cloud-feign 分支 Spring-Cloud-Feign之日誌輸出，

寫在最後

Spring Cloud Feign 系列持續更新中。。。。。歡迎關注

如發現哪些知識點有誤或是沒有看懂，歡迎在評論區提出，博主及時改正。

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