SpringCloud学习笔记------Feign自定义日志

自定Spring Cloud Feign日志输出 参考DefaultFeignLoggerFactory类实现自己的日志工厂实现类。

场景说明：将原有的debug级别，修改成info级别

第一步:实现FeignLoggerFactory工厂接口,InfoFeignLoggerFactory 是FeignConfig静态内部类  

public static class InfoFeignLoggerFactory implements FeignLoggerFactory { @Override public Logger create(Class<?> type) { return new InfoFeignLogger(LoggerFactory.getLogger(type)); } }

 

第二部: 继承feign.Logger实现info级别日志输出，InfoFeignLogger使用slf4j日志工具，此处只是简单的实现了info级别日志输出，如果想效率更高请参考Slf4jLogger添加一些日记级别判断

public class InfoFeignLogger extends feign.Logger { private final Logger logger; public InfoFeignLogger(Logger logger) { this.logger = logger; } @Override protected void log(String configKey, String format, Object... args) { if (logger.isInfoEnabled()) { logger.info(String.format(methodTag(configKey) + format, args)); } } }

第三部:日志工厂InfoFeignLoggerFactory注册到spring 容器中，使用spring java Config

@Configuration public class FeignConfig { @Bean Logger.Level feignLevel() { return Logger.Level.FULL; } @Bean FeignLoggerFactory infoFeignLoggerFactory() { return new InfoFeignLoggerFactory(); } } 2019-05-22 17:53:31.548 INFO 17489 --- [ main] com.zxw.feign.UserFeign : [UserFeign#save] ---> POST http://localhost:8888/user HTTP/1.1 2019-05-22 17:53:31.549 INFO 17489 --- [ main] com.zxw.feign.UserFeign : [UserFeign#save] Content-Type: application/json;charset=UTF-8 2019-05-22 17:53:31.549 INFO 17489 --- [ main] com.zxw.feign.UserFeign : [UserFeign#save] Content-Length: 27 2019-05-22 17:53:31.549 INFO 17489 --- [ main] com.zxw.feign.UserFeign : [UserFeign#save] 2019-05-22 17:53:31.549 INFO 17489 --- [ main] com.zxw.feign.UserFeign : [UserFeign#save] {"id":null,"name":"张三"} 2019-05-22 17:53:31.549 INFO 17489 --- [ main] com.zxw.feign.UserFeign : [UserFeign#save] ---> END HTTP (27-byte body) 2019-05-22 17:53:31.621 INFO 17489 --- [ main] com.zxw.feign.UserFeign : [UserFeign#save] <--- HTTP/1.1 200 (71ms) 2019-05-22 17:53:31.621 INFO 17489 --- [ main] com.zxw.feign.UserFeign : [UserFeign#save] content-length: 0 2019-05-22 17:53:31.621 INFO 17489 --- [ main] com.zxw.feign.UserFeign : [UserFeign#save] date: Wed, 22 May 2019 09:53:31 GMT 2019-05-22 17:53:31.621 INFO 17489 --- [ main] com.zxw.feign.UserFeign : [UserFeign#save] 2019-05-22 17:53:31.621 INFO 17489 --- [ main] com.zxw.feign.UserFeign : [UserFeign#save] <--- END HTTP (0-byte body) 2019-05-22 17:53:31.623 INFO 17489 --- [ main] com.zxw.feign.UserFeign : [UserFeign#getUserByID] ---> GET http://localhost:8888/user/1 HTTP/1.1 2019-05-22 17:53:31.624 INFO 17489 --- [ main] com.zxw.feign.UserFeign : [UserFeign#getUserByID] ---> END HTTP (0-byte body) 2019-05-22 17:53:31.649 INFO 17489 --- [ main] com.zxw.feign.UserFeign : [UserFeign#getUserByID] <--- HTTP/1.1 200 (24ms) 2019-05-22 17:53:31.654 INFO 17489 --- [ main] com.zxw.feign.UserFeign : [UserFeign#getUserByID] content-type: application/json;charset=UTF-8 2019-05-22 17:53:31.660 INFO 17489 --- [ main] com.zxw.feign.UserFeign : [UserFeign#getUserByID] date: Wed, 22 May 2019 09:53:31 GMT 2019-05-22 17:53:31.661 INFO 17489 --- [ main] com.zxw.feign.UserFeign : [UserFeign#getUserByID] transfer-encoding: chunked 2019-05-22 17:53:31.661 INFO 17489 --- [ main] com.zxw.feign.UserFeign : [UserFeign#getUserByID] 2019-05-22 17:53:31.663 INFO 17489 --- [ main] com.zxw.feign.UserFeign : [UserFeign#getUserByID] {"id":"1","name":"张三"}

细心的同学可能会发现，为什么我们的FeignLoggerFactory就起作用了，其实这是spring 强大的条件装配功能

当FeignLoggerFactory不存在时才加载默认DefaultFeignLoggerFactory,如果对spring 条件装配感兴趣的同学可以看下官网，spring boot对spring条件装配扩展了很多注解。