SpringCloud中Fegion的日志

创建工程

具体实现

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.itmuch.cloud</groupId>
  <artifactId>microservice-consumer-movie-feign-logging</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>jar</packaging>

  <!-- 引入spring boot的依赖 -->
  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.4.3.RELEASE</version>
  </parent>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <java.version>1.8</java.version>
  </properties>

  <dependencies>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>

    <dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-starter-eureka</artifactId>
    </dependency>

    <dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-starter-feign</artifactId>
    </dependency>
  </dependencies>

  <!-- 引入spring cloud的依赖 -->
  <dependencyManagement>
    <dependencies>
      <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-dependencies</artifactId>
        <version>Camden.SR4</version>
        <type>pom</type>
        <scope>import</scope>
      </dependency>
    </dependencies>
  </dependencyManagement>

  <!-- 添加spring-boot的maven插件 -->
  <build>
    <plugins>
      <plugin>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
      </plugin>
    </plugins>
  </build>
</project>

application.yml

server:
  port: 8010
spring:
  application:
    name: microservice-consumer-movie
eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/
  instance:
    prefer-ip-address: true
logging:
  level:
    com.itmuch.cloud.study.user.feign.UserFeignClient: DEBUG # 将Feign接口的日志级别设置成DEBUG，因为Feign的Logger.Level只对DEBUG作出响应。

说明：

    1）需要在配置文件中添加logging.level;

User

com.itmuch.cloud.study.user.entity.User

package com.itmuch.cloud.study.user.entity;

import java.math.BigDecimal;

public class User {
  private Long id;
  private String username;
  private String name;
  private Integer age;
  private BigDecimal balance;

  public Long getId() {
    return this.id;
  }

  public void setId(Long id) {
    this.id = id;
  }

  public String getUsername() {
    return this.username;
  }

  public void setUsername(String username) {
    this.username = username;
  }

  public String getName() {
    return this.name;
  }

  public void setName(String name) {
    this.name = name;
  }

  public Integer getAge() {
    return this.age;
  }

  public void setAge(Integer age) {
    this.age = age;
  }

  public BigDecimal getBalance() {
    return this.balance;
  }

  public void setBalance(BigDecimal balance) {
    this.balance = balance;
  }
}

FeignLogConfiguration

com.itmuch.cloud.config.FeignLogConfiguration

package com.itmuch.cloud.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import feign.Logger;

@Configuration
public class FeignLogConfiguration {
  @Bean
  Logger.Level feignLoggerLevel() {
    return Logger.Level.BASIC;
  }
}

说明：

    1）此步骤比较关键；针对每一个Feign客户端，可以配置一个Logger.Level对象，通过该对象控制日志输出内容。

    2）Logger.Level有如下几种选择：

        2.1）NONE, 不记录日志 (默认)；

        2.2）BASIC, 只记录请求方法和URL以及响应状态代码和执行时间；

        2.3）HEADERS, 记录请求和应答的头的基本信息；

        2.4）FULL, 记录请求和响应的头信息，正文和元数据；

    3）因为在官网API中有提到“NONE, no loggin（DEFAULT）”，就是说默认日志级别时NONE的。

UserFeignClient

com.itmuch.cloud.study.user.feign.UserFeignClient

package com.itmuch.cloud.study.user.feign;

import org.springframework.cloud.netflix.feign.FeignClient;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import com.itmuch.cloud.config.FeignLogConfiguration;
import com.itmuch.cloud.study.user.entity.User;

@FeignClient(name = "microservice-provider-user", configuration = FeignLogConfiguration.class)
public interface UserFeignClient {
  @RequestMapping(value = "/{id}", method = RequestMethod.GET)
  public User findById(@PathVariable("id") Long id);
}

MovieController

com.itmuch.cloud.study.user.controller.MovieController

package com.itmuch.cloud.study.user.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;

import com.itmuch.cloud.study.user.entity.User;
import com.itmuch.cloud.study.user.feign.UserFeignClient;

@RestController
public class MovieController {
  @Autowired
  private UserFeignClient userFeignClient;

  @GetMapping("/user/{id}")
  public User findById(@PathVariable Long id) {
    return this.userFeignClient.findById(id);
  }
}

测试

http://localhost:8010/user/1

说明：

    1）启动测试，可以看到控制台输出debug日志；

2018-07-11 02:47:07.716 DEBUG 8632 --- [provider-user-8] c.i.c.study.user.feign.UserFeignClient   : [UserFeignClient#findById] ---> GET http://microservice-provider-user/1 HTTP/1.1
2018-07-11 02:47:07.725 DEBUG 8632 --- [provider-user-8] c.i.c.study.user.feign.UserFeignClient   : [UserFeignClient#findById] <--- HTTP/1.1 200 (8ms)