目的：
Hystrix集群及监控turbine
Feign、Hystrix整合之服务熔断服务降级彻底解耦
集群后超时设置
Hystrix集群及监控turbine
新建一个springboot工程microservice-student-provider-hystrix-1005把它作为集群
工程中测试详细代码见https://www.cnblogs.com/huangting/p/11902121.html
导入pom依赖
<?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> <parent> <groupId>com.ht</groupId> <artifactId>htSpringCloud</artifactId> <version>1.0-SNAPSHOT</version> </parent> <artifactId>microservice-student-provider-hystrix-1005</artifactId> <properties> <java.version>1.8</java.version> </properties> <dependencies> <!--添加注册中心Eureka相关配置--> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-eureka</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-config</artifactId> </dependency> <!-- actuator监控引入 --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-tomcat</artifactId> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid-spring-boot-starter</artifactId> </dependency> <!-- 修改后立即生效，热部署 --> <dependency> <groupId>org.springframework</groupId> <artifactId>springloaded</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> </dependency> <dependency> <groupId>com.ht</groupId> <artifactId>microservice-common</artifactId> <version>1.0-SNAPSHOT</version> <scope>compile</scope> </dependency> <!--Hystrix相关依赖--> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-hystrix</artifactId> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
修改yml配置：
--- server: port: 1004 context-path: / spring: datasource: type: com.alibaba.druid.pool.DruidDataSource driver-class-name: com.mysql.jdbc.Driver url: jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf8 username: root password: root jpa: hibernate: ddl-auto: update show-sql: true application: name: microservice-student profiles: provider-hystrix-1004 eureka: instance: hostname: localhost appname: microservice-student instance-id: microservice-student:1004 prefer-ip-address: true client: service-url: defaultZone: http://eureka2001.ht.com:2001/eureka/,http://eureka2002.ht.com:2002/eureka/,http://eureka2003.ht.com:2003/eureka/ info: groupId: com.ht.testSpringcloud artifactId: microservice-student-provider-hystrix-1004 version: 1.0-SNAPSHOT userName: http://ht.com phone: 123456 hystrix: command: default: execution: isolation: thread: timeoutInMilliseconds: 1500 --- server: port: 1005 context-path: / spring: datasource: type: com.alibaba.druid.pool.DruidDataSource driver-class-name: com.mysql.jdbc.Driver url: jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf8 username: root password: root jpa: hibernate: ddl-auto: update show-sql: true application: name: microservice-student profiles: provider-hystrix-1005 eureka: instance: hostname: localhost appname: microservice-student instance-id: microservice-student:1005 prefer-ip-address: true client: service-url: defaultZone: http://eureka2001.ht.com:2001/eureka/,http://eureka2002.ht.com:2002/eureka/,http://eureka2003.ht.com:2003/eureka/ info: groupId: com.ht.htSpringCloud artifactId: microservice-student-provider-hystrix-1005 version: 1.0-SNAPSHOT userName: http://ht.com phone: 123456 hystrix: command: default: execution: isolation: thread: timeoutInMilliseconds: 1500 --- server: port: 1006 context-path: / spring: datasource: type: com.alibaba.druid.pool.DruidDataSource driver-class-name: com.mysql.jdbc.Driver url: jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf8 username: root password: root jpa: hibernate: ddl-auto: update show-sql: true application: name: microservice-student profiles: provider-hystrix-1006 eureka: instance: hostname: localhost appname: microservice-student instance-id: microservice-student:1006 prefer-ip-address: true client: service-url: defaultZone: http://eureka2001.ht.com:2001/eureka/,http://eureka2002.ht.com:2002/eureka/,http://eureka2003.ht.com:2003/eureka/ info: groupId: com.ht.htSpringCloud artifactId: microservice-student-provider-hystrix-1006 version: 1.0-SNAPSHOT userName: http://ht.com phone: 123456 hystrix: command: default: execution: isolation: thread: timeoutInMilliseconds: 1500
启动类MicroserviceStudentProviderHystrix1005Application 中添加注释
package com.ht.microservicestudentproviderhystrix1005; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.autoconfigure.domain.EntityScan; import org.springframework.cloud.client.circuitbreaker.EnableCircuitBreaker; import org.springframework.cloud.netflix.eureka.EnableEurekaClient; @EnableCircuitBreaker @EntityScan("com.ht.*.*") @EnableEurekaClient @SpringBootApplication public class MicroserviceStudentProviderHystrix1005Application { public static void main(String[] args) { SpringApplication.run(MicroserviceStudentProviderHystrix1005Application.class, args); } }
然后配置启动项的时候多搞几个启动项，这里搞了三个
provider-hystrix-1004
provider-hystrix-1005
provider-hystrix-1006
好了一个hystrix集群服务就搭好了。
修改pom依赖：
<?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> <parent> <groupId>com.ht</groupId> <artifactId>htSpringCloud</artifactId> <version>1.0-SNAPSHOT</version> </parent> <artifactId>microservice-student-consumer-hystrix-turbine-91</artifactId> <properties> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> <exclusions> <exclusion> <groupId>org.junit.vintage</groupId> <artifactId>junit-vintage-engine</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-turbine</artifactId> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
配置yml文件
server: port: 91 context-path: / eureka: client: service-url: defaultZone: http://eureka2001.ht.com:2001/eureka/,http://eureka2002.ht.com:2002/eureka/,http://eureka2003.ht.com:2003/eureka/ turbine: app-config: microservice-student # 指定要监控的应用名称 clusterNameExpression: "'default'" #表示集群的名字为default spring: application: name: turbine
给启动类MicroserviceStudentConsumerHystrixTurbine91Application 加注解：@EnableTurbine
package com.ht.microservicestudentconsumerhystrixdashboard90; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration; import org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration; import org.springframework.cloud.netflix.turbine.EnableTurbine; @SpringBootApplication(exclude={DataSourceAutoConfiguration.class, HibernateJpaAutoConfiguration.class}) @EnableTurbine public class MicroserviceStudentConsumerHystrixDashboard90Application { public static void main(String[] args) { SpringApplication.run(MicroserviceStudentConsumerHystrixDashboard90Application.class, args); } }
测试：
先启动三个eureka，然后把1004 1005 带hystrix的服务都启动；
microservice-student-consumer-80这个也启动，方便测试；
dashboard，turbine启动；
这样的话 http://localhost/student/hystrix 就能调用服务集群；
http://localhost:91/turbine.stream 可以监控数据，实时ping 返回data
输入http://localhost:90/hystrix进入仪表盘，输入地址，进行实时监控测试
Feign、Hystrix整合之服务熔断服务降级彻底解耦
前面的代码，用@HystrixCommand fallbackMethod是很不好的，因为和业务代码耦合度太高，不利于维护，所以需要解耦，这我们讲下Feign Hystrix整合。
microservice-student-provider-hystrix项目修改
我们不用原先那套。按照正常的逻辑来写；
StudentService加新的接口方法：
/** * 测试Hystrix服务降级 * @return */ public Map<String,Object> hystrix();
StudentServiceImpl实现：
@Override public Map<String, Object> hystrix() { Map<String,Object> map=new HashMap<String,Object>(); map.put("code", 200); map.put("info","工号【"+port+"】正在为您服务"); return map; }
StudentProviderController正常调用service方法：
/** * 测试Hystrix服务降级 * @return * @throws InterruptedException */ @ResponseBody @GetMapping(value="/hystrix") @HystrixCommand(fallbackMethod="hystrixFallback") public Map<String,Object> hystrix() throws InterruptedException{ Thread.sleep(2000); // Map<String,Object> map=new HashMap<String,Object>(); // map.put("code", 200); // map.put("info","工号【"+port+"】正在为您服务"); return studentService.hystrix(); }
microservice-common项目新建FallbackFactory类，解耦服务熔断服务降级
StudentClientService接口，新增getInfo方法；
/** * 服务熔断降级 * @return */ @GetMapping(value="/student/hystrix") public Map<String,Object> hystrix();
microservice-common的application.yml加上hystrix支持
hystrix支持
feign: hystrix: enabled: true
新建 StudentClientFallbackFactory 类，实现FallbackFactory接口；
package com.ht.microservicestudentproviderhystrix.service; import com.ht.microservicecommon.StudentClientService; import com.ht.microservicecommon.entity.Student; import feign.hystrix.FallbackFactory; import java.util.HashMap; import java.util.List; import java.util.Map; public class StudentClientFallbackFactory implements FallbackFactory<StudentClientService> { @Override public StudentClientService create(Throwable cause) { return new StudentClientService() { @Override public boolean save(Student student) { return false; } @Override public List<Student> list() { return null; } @Override public Map<String, Object> hystrix() { Map<String,Object> map=new HashMap<String,Object>(); map.put("code", 500); map.put("info", "系统繁忙，稍后重试"); return map; } @Override public Student get(Integer id) { return null; } @Override public boolean delete(Integer id) { return false; } @Override public String ribbon() { return null; } }; } }
StudentClientService接口的@FeignClient注解加下 fallbackFactory属性
@FeignClient(value="MICROSERVICE-STUDENT",fallbackFactory=StudentClientFallbackFactory.class)
microservice-student-consumer-feign-80修改 支持Hystrix
StudentConsumerFeignController新增方法调用
/** * Feign整合Hystrix服务熔断降级 * @return * @throws InterruptedException */ @GetMapping(value="/hystrix") public Map<String,Object> hystrix() throws InterruptedException{ return studentClientService.hystrix(); }
microservice-student-consumer-feign-80启动类中添加注释
package com.ht.microservicestudentconsumerfeign80; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration; import org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration; import org.springframework.cloud.netflix.eureka.EnableEurekaClient; import org.springframework.cloud.netflix.feign.EnableFeignClients; import org.springframework.context.annotation.ComponentScan; @EnableEurekaClient @EnableFeignClients(value = "com.ht.*.*") @ComponentScan(basePackages = {"com.ht.microservicecommon.service", "com.ht.microservicestudentconsumerfeign80"}) @SpringBootApplication(exclude={DataSourceAutoConfiguration.class, HibernateJpaAutoConfiguration.class}) public class MicroserviceStudentConsumerFeign80Application { public static void main(String[] args) { SpringApplication.run(MicroserviceStudentConsumerFeign80Application.class, args); } }
集群后超时设置
microservice-common的application.yml加上hystrix支持
这里因为还有一个 feign 也有一个超时时间的设置，当然feign底层是 ribbon的封装，所以 直接配置ribbon，ribbon默认超时也是1秒。
所以这里都是强制要求，ribbon的超时时间要大于hystrix的超时时间，否则 hystrix自定义的超时时间毫无意义。
所以还得microservice-student-consumer-feign-80上加个 ribbon超时时间设置
hystrix:
command:
default:
execution:
isolation:
thread:
timeoutInMilliseconds: 1500
这里因为还有一个 feign 也有一个超时时间的设置，当然feign底层是 ribbon的封装，所以 直接配置ribbon，ribbon默认超时也是1秒。
所以这里都是强制要求，ribbon的超时时间要大于hystrix的超时时间，否则 hystrix自定义的超时时间毫无意义。
所以还得microservice-student-consumer-feign-80上加个 ribbon超时时间设置
ribbon:
ReadTimeout: 10000
ConnectTimeout: 9000