05.openfeign使用
一、项目结构
1.一个共两个服务
2.父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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>cn.luoruiyuan</groupId>
<artifactId>Spring-Cloud-Lry</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>Spring-Cloud-Lry</name>
<description>Spring-Cloud-Lry</description>
<packaging>pom</packaging>
<modules>
<module>stock</module>
<module>order</module>
</modules>
<properties>
<java.version>1.8</java.version>
<spring.boot.version>2.3.12.RELEASE</spring.boot.version>
<spring.cloud.version>Hoxton.SR12</spring.cloud.version>
<spring.cloud.alibaba.version>2.2.8.RELEASE</spring.cloud.alibaba.version>
</properties>
<!-- 版本管理(子工程引入了才会导jar包) -->
<dependencyManagement>
<dependencies>
<dependency>
<!--Spring Boot 版本管理-->
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>${spring.boot.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<!--Spring Cloud 版本管理-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring.cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<!--Spring Cloud Alibaba 版本管理-->
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-alibaba-dependencies</artifactId>
<version>${spring.cloud.alibaba.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<!-- 直接导入jar包 -->
<dependencies>
<!-- Spring Boot启动器 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<!-- 测试 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!-- WEB场景 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- 开发工具 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<!--lombok-->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<!-- alibaba nacos注册中心 -->
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>
<!-- openfeign -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>
</dependencies>
</project>
3.order的pom.xml文件
<?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">
<parent>
<artifactId>Spring-Cloud-Lry</artifactId>
<groupId>cn.luoruiyuan</groupId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>order</artifactId>
<properties>
<maven.compiler.source>8</maven.compiler.source>
<maven.compiler.target>8</maven.compiler.target>
</properties>
<dependencies>
</dependencies>
</project>
4.stock的pom.xml文件
<?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">
<parent>
<artifactId>Spring-Cloud-Lry</artifactId>
<groupId>cn.luoruiyuan</groupId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>stock</artifactId>
<properties>
<maven.compiler.source>8</maven.compiler.source>
<maven.compiler.target>8</maven.compiler.target>
</properties>
<dependencies>
</dependencies>
</project>
二、使用feign
1.引入依赖
2.order启动类上面启用feign
3.创建调用stock服务的接口
4.接口对应关系,左边为order,右边为stock
5.调用
三、扩展配置
1.全局日志配置
1)配置文件修改日志级别
2)创建feign配置文件
3)日志输出
2.局部日志生效配置
1)取消配置文件上面的@Configuration注解,在StockService上面去指定配置类
3.配置文件方式配置日志
4.修改契约,使用Feign原生注解
1)配置类方式
2)配置文件方式
5.超时时间配置
1)配置类方式
2)配置文件方式
6.Fegin拦截器,在请求服务端时做一些事情(日志记录,认证等)
1)配置类方式
2)配置文件方式
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