Eureka实战_com.atguigu pom

作者：你好赵伟 | 2024-04-15 23:06:33

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com.atguigu pom

实现80端口和8001、8002都注册到Eureka服务中心，同时7001和7002是一个服务集群，实现相互注册、相互守望

一、7001服务服务

pom.xml文件


 <dependencies>
        <!--eureka-server-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
        </dependency>
        <!-- 引入自己定义的api通用包，可以使用Payment支付Entity -->
        <dependency>
            <groupId>com.atguigu.springcloud</groupId>
            <artifactId>cloud-api-commons</artifactId>
            <version>${project.version}</version>
        </dependency>
        <!--boot web actuator-->
        <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>
        <!--一般通用配置-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
        </dependency>
    </dependencies>

application.yml


server:
  port: 7001
eureka:
  instance:
    hostname: eureka7001.com #eureka服务端的实例名称
  client:
    register-with-eureka: false     #false表示不向注册中心注册自己。
    fetch-registry: false     #false表示自己端就是注册中心，我的职责就是维护服务实例，并不需要去检索服务
    service-url:
      #集群指向其它eureka
      defaultZone: http://eureka7002.com:7002/eureka/
      #单机就是7001自己
      #defaultZone: http://eureka7001.com:7001/eureka/
    server:
    #关闭自我保护机制，保证不可用服务被及时踢除
    enable-self-preservation: false
    eviction-interval-timer-in-ms: 2000

7001启动类


package com.atguigu.springcloud;
 
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
 
/**
 * @author BLL
 * @create 2020/3/23 17:39
 */
@SpringBootApplication
@EnableEurekaServer
public class EurekaMain7001 {
    public static void main(String[] args) {
        SpringApplication.run(EurekaMain7001.class, args);
    }
}

7002服务服务给7001服务一样，只需要把端口号改为7002即可，然后分别启动7001服务和7002服务，实现7001和7002服务之间相互注册、相互守望.

7001服务中注册进了7002

7002服务中注册进了7001，从而实现了7001和7002服务之间相互注册、相互守望.

二、让provider8001和8002也注册进Eureka注册中心

目录结构（因为既然是提供者肯定要实现一定的业务逻辑）

pom.xml文件


 <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</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-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
 
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.16.18</version>
        </dependency>
        <dependency><!-- 引入自己定义的api通用包，可以使用Payment支付Entity -->
            <groupId>com.atguigu.springcloud</groupId>
            <artifactId>cloud-api-commons</artifactId>
            <version>${project.version}</version>
        </dependency>
 
    </dependencies>

application.yml文件


server:
  port: 8001
spring:
  application:
    name: cloud-payment-service #服务名称
 
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource  #当前数据源操作类型
    driver-class-name: org.gjt.mm.mysql.Driver
    url: jdbc:mysql://localhost:3306/db2019?characterEncoding=utf8&useSSL=false&serverTimezone=UTC&rewriteBatchedStatements=true
    username: root
    password: root
eureka:
  client:
    # 表示是否将自己注册进 EurekaServer 默认为 true
    register-with-eureka: true
    # 是否从 EurekaServer 抓取已有的注册信息，默认为 true. 单节点无所谓，集群必须设置为 true，才能配置 ribbon 使用负载均衡
    fetch-registry: true
    service-url:
      defaultZone: http://eureka7001.com:7001/eureka/,http://eureka7002.com:7002/eureka/
  instance:
    instance-id: payment8001
    prefer-ip-address: true    #访问路径可以显示Ip地址
    lease-renewal-interval-in-seconds: 1
    lease-expiration-duration-in-seconds: 2
mybatis:
  mapper-locations: classpath:mapper/*.xml
  type-aliases-package: com.atguigu.springcloud.entities  #所有entity别名所在包

Controller层的业务类


package com.atguigu.springcloud.controller;
 
import com.atguigu.springcloud.entities.CommonResult;
import com.atguigu.springcloud.entities.Payment;
import com.atguigu.springcloud.service.PaymentService;
import lombok.extern.slf4j.Slf4j;
import org.junit.platform.commons.logging.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.web.bind.annotation.*;
 
import javax.annotation.Resource;
import java.util.List;
import java.util.logging.Logger;
 
/**
 * @author BLL
 * @create 2020/3/17 17:49
 */
@RestController
@Slf4j
public class PaymentController {
    @Resource
    private PaymentService paymentService;
    @Value("${server.port}")
    private String serverPort;
    @Resource
    private DiscoveryClient discoveryClient; //服务发现，可以发现自己注册到服务上的信息
    @PostMapping(value = "/payment/create")
    public CommonResult create(@RequestBody Payment payment){
          int result=paymentService.create(payment);
          if(result>0){
              return  new CommonResult(200,"插入成功,serverPort"+serverPort,result);
          }else {
              return new CommonResult(444,"插入数据失败",null);
          }
    }
 
    @GetMapping(value = "/payment/get/{id}")
    public CommonResult getPaymentById(@PathVariable("id") Long id){
        Payment payment=paymentService.getPamentById(id);
        if(payment!=null){
            return new CommonResult(200,"查询数据成功,serverPort"+serverPort,payment);
        }else {
            return new CommonResult(444,"插入数据库失败",null);
        }
    }
    @GetMapping(value = "/payment/discover")
    public  Object discover(){
        List<String> service=discoveryClient.getServices();
        for(String element:service){
            System.out.println("******element"+element);
        }
     List<ServiceInstance> instances=discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");
        for(ServiceInstance instance:instances){
            System.out.println(instance.getServiceId()+"\t"+instance.getHost()+"\t"+instance.getPort()+"\t"+instance.getUri());
        }
        return  discoveryClient;
    }
}

8001启动类


package com.atguigu.springcloud;
 
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
 
@SpringBootApplication
@EnableEurekaClient
@EnableDiscoveryClient
public class PaymentMain8001 {
    public static void main(String[] args) {
        SpringApplication.run(PaymentMain8001.class, args);
    }
 
}

启动8001和8002后

80分支注册进Eureka服务中心，同时实现对8001和8002进行消费

pom.xml文件


  <dependencies>
        <dependency><!-- 引入自己定义的api通用包，可以使用Payment支付Entity -->
            <groupId>com.atguigu.springcloud</groupId>
            <artifactId>cloud-api-commons</artifactId>
            <version>${project.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</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-actuator</artifactId>
        </dependency>
 
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-commons</artifactId>
            <version>2.2.1.RELEASE</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-commons</artifactId>
            <version>2.2.1.RELEASE</version>
            <scope>compile</scope>
        </dependency>
    </dependencies>

application.yml文件


server:
  port: 80
spring:
  application:
    name: cloud-order-service
eureka:
  client:
    #表示是否将自己注册进EurekaServer默认为true。
    register-with-eureka: true
    #是否从EurekaServer抓取已有的注册信息，默认为true。单节点无所谓，集群必须设置为true才能配合ribbon使用负载均衡
    fetchRegistry: true
    service-url:
      #单机
      #defaultZone: http://localhost:7001/eureka
      # 集群
      defaultZone: http://eureka7001.com:7001/eureka,http://eureka7002.com:7002/eureka  # 集群版tp://eureka7001.com:7001/eureka/,http://eureka7002.com:7002/eureka/

80服务的启动类：


package com.atguigu.springcloud;
 
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
 
/**
 * @author BLL
 * @create 2020/3/18 17:29
 */
@SpringBootApplication
public class OrderMain80 {
    public static void main(String[] args) {
        SpringApplication.run(OrderMain80.class, args);
    }
}

启动80服务的启动类后

三、现在80、8001、8002都已经注册进入Eureka服务注册中心了，我们可以通过服务名称实现80跨服务访问8001和8002上的业务。

80服务的controller的实现如下：（注意：服务名称进行访问的）

public static  final String PAYMENT_URL="http://CLOUD-PAYMENT-SERVICE";


package com.atguigu.springcloud.Controller;
 
import com.atguigu.springcloud.entities.CommonResult;
import com.atguigu.springcloud.entities.Payment;
import lombok.extern.slf4j.Slf4j;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.client.RestTemplate;
 
import javax.annotation.Resource;
 
/**
 * @author BLL
 * @create 2020/3/18 17:42
 */
@RestController
@Slf4j
public class OrderController {
//    public static  final String PAYMENT_URL="http://localhost:8001";
public static  final String PAYMENT_URL="http://CLOUD-PAYMENT-SERVICE";
 
    @Resource
    private RestTemplate restTemplate;
    @GetMapping(value = "/consumer/payment/create")
    public CommonResult create(Payment payment){
        return restTemplate.postForObject(PAYMENT_URL+"/payment/create",payment,CommonResult.class);
    }
    @GetMapping(value = "/consumer/payment/get/{id}")
    public  CommonResult getPayment1(@PathVariable("id")Long id){
        return restTemplate.getForObject(PAYMENT_URL+"/payment/get/"+id,CommonResult.class);
    }
    @GetMapping(value = "/consumer/payment/getEntity/{id}")
    public  CommonResult getPayment2(@PathVariable("id")Long id){
        ResponseEntity<CommonResult> entity=restTemplate.getForEntity(PAYMENT_URL+"/payment/get/"+id,CommonResult.class);
        if(entity.getStatusCode().is2xxSuccessful()){
            return entity.getBody();
        }else {
            return new CommonResult(444,"插入数据失败",null);
        }
 
    }
}

通过请求映射地址请求：（由于Eureka中自带rubbio的负载均衡机制，所以会实现轮询机制，对8001提供者和8002提供者进行轮询访问）

备注：RestTemplate实现过程

以上就是利用Eureka进行注册，消费过程，刚开始学习，还有很多原理弄得不太清楚，所以有点乱，但是就是为了记下来，加深下印象，不喜勿喷，谢谢。

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