Spring-Cloud Hystrix局部降级和全局降级

比眉伴天荒 2023-10-05 10:24 50阅读 0赞

#### Hystrix服务熔断 ####

*  Hystrix 局部熔断
 *   *  1. 在服务调用端（user-server）添加依赖
     *  2. 在UserServerImpl实现类添加假数据方法和注解
     *  3. 在启动类上添加注解
     *  4. 依次启动服务
     *  5. 在Postman中测试
 *  Hystrix 全局熔断

## Hystrix 局部熔断 ##

### 1. 在服务调用端（user-server）添加依赖 ###

<dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-actuator</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
            </dependency>

### 2. 在UserServerImpl实现类添加假数据方法和注解 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTYyNjI4OA_size_16_color_FFFFFF_t_70_pic_center]

### 3. 在启动类上添加注解 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTYyNjI4OA_size_16_color_FFFFFF_t_70_pic_center 1]

### 4. 依次启动服务 ###

Eureka >>  Order  >>  User

### 5. 在Postman中测试 ###

输入：[http://localhost:8001/findUserOrder?uid=2][http_localhost_8001_findUserOrder_uid_2].

当测试的num小于5时就会被熔断  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTYyNjI4OA_size_16_color_FFFFFF_t_70_pic_center 2]  
num大于5的时候则会正常返回数据  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTYyNjI4OA_size_16_color_FFFFFF_t_70_pic_center 3]

## Hystrix 全局熔断 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTYyNjI4OA_size_16_color_FFFFFF_t_70_pic_center 4]

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[http_localhost_8001_findUserOrder_uid_2]: http://localhost:8001/findUserOrder?uid=2
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