SpringCloud學習筆記------Feign自定義日誌

自定Spring Cloud Feign日誌輸出
參考DefaultFeignLoggerFactory類實現自己的日誌工廠實現類。

場景說明：將原有的debug級別，修改成info級別

第一步:實現FeignLoggerFactory工廠接口,InfoFeignLoggerFactory 是FeignConfig靜態內部類
 

public static class InfoFeignLoggerFactory implements FeignLoggerFactory {

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

 

第二部: 繼承feign.Logger實現info級別日誌輸出，InfoFeignLogger使用slf4j日誌工具，此處只是簡單的實現了info級別日誌輸出，如果想效率更高請參考Slf4jLogger添加一些日記級別判斷

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:日誌工廠InfoFeignLoggerFactory註冊到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":"張三"}
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":"張三"}

細心的同學可能會發現，爲什麼我們的FeignLoggerFactory就起作用了，其實這是spring 強大的條件裝配功能

當FeignLoggerFactory不存在時才加載默認DefaultFeignLoggerFactory,如果對spring 條件裝配感興趣的同學可以看下官網，spring boot對spring條件裝配擴展了很多註解。