Spring Cloud Feign 之日志输出

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Spring Cloud Feign 之日志输出

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环境信息: java 1.8、Spring boot 1.5.10.RELEASE、spring cloud-Edgware.SR3、maven 3.3+

第一章 Spring Cloud Feign 之初体验已经对Feign有了初步了解，这章介绍下Feign的日志输出

在平时开发过程中少不了查看日志解决问题，一个好的框架日志输出是必不可少的，Feign也一样

Feign日志输出说明

Feign的日志是以下部分组成

1、Feign的Level日志级别配置默认是:NONE，不要跟log日志级别混淆

日志级别枚举类 Logger.Level

NONE 不输出日志

BASIC 只有请求方法、URL、响应状态代码、执行时间

HEADERS基本信息以及请求和响应头

FULL 请求和响应 的heads、body、metadata，建议使用这个级别

2、log日志级别配置，默认是debug

使用指定Feign类会包名配置日志打印级别

此处使用spring logging配置 比如打印 UserFeign logging.level.com.example.feign.UserFeign=debug

Feign日志输出-Logger.Level.FULL+log debug级别

全局开启方式 使用spring java config 配置，注意该类一定要放到spring可以扫描到的包下

/**
 * 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 日志输出级别

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

运行 UserFeignTest.save方法 可以看到以下保存user输出的请求和响应日志。

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":"张三"}
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)

运行 UserFeignTest.getUserByID方法 可以看到以下查询user详情输出的请求和响应日志。

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":"张三"}
2018-08-07 16:48:03.055 DEBUG 75661 --- [           main] com.example.feign.UserFeign              : [UserFeign#getUserByID] <--- END HTTP (26-byte body)

总结

此章节只介绍了feign自带的日志输出配置方式，下面章节将详细介绍其实现原理及自定义log 日志级别输出。

样例地址 spring-cloud-feign 分支 Spring-Cloud-Feign之日志输出，

写在最后

Spring Cloud Feign 系列持续更新中。。。。。欢迎关注

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