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Eureka替换方案Zookeeper

1 Zookeeper简介

  • zookeeper的官网。

  • zookeeper由雅虎研究院开发，是Google Chubby的开源实现，后来托管到Apache，于2010年11月正式成为Apache的顶级项目。

  • 大数据生态系统里的很多组件的命名都是某种动物或者昆虫，比如Hadoop就是🐘，Hive就是🐝。zookeeper即动物园管理者，顾名思义就是管理大数据生态系统各组件的管理员，如下图所示。

2 服务提供者注册到Zookeeper

2.1 导入相关jar包的Maven坐标

  • 修改部分：
<!--   SpringCloud整合zookeeper     -->
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
    <!--排除zk3.5.3-->
    <exclusions>
        <exclusion>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
        </exclusion>
    </exclusions>
</dependency>
<dependency>
    <groupId>org.apache.zookeeper</groupId>
    <artifactId>zookeeper</artifactId>
    <version>3.4.10</version>
    <exclusions>
        <exclusion>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
        </exclusion>
    </exclusions>
</dependency>
  • 完整部分：
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns="http://maven.apache.org/POM/4.0.0"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>spring_cloud_demo</artifactId>
        <groupId>org.sunxiaping</groupId>
        <version>1.0</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>product_service_zookeeper9001</artifactId>

    <dependencies>
        <!--   SpringCloud整合zookeeper     -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
            <!--排除zk3.5.3-->
            <exclusions>
                <exclusion>
                    <groupId>org.apache.zookeeper</groupId>
                    <artifactId>zookeeper</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.4.10</version>
            <exclusions>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-log4j12</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</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>
            <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-actuator</artifactId>
        </dependency>
    </dependencies>
</project>

2.2 application.yml

  • 修改部分：
spring:
# SpringCloud
  cloud:
    zookeeper:
      connect-string: 192.168.237.100:2181
  • 完整部分：
server:
  port: 9001 # 微服务的端口号

spring:
  application:
    name: service-product # 微服务的名称
  datasource:
    url: jdbc:mysql://192.168.237.100:3306/test?useUnicode=true&characterEncoding=UTF-8&autoReconnect=true&useSSL=false&serverTimezone=GMT%2B8&allowPublicKeyRetrieval=true
    driver-class-name: com.mysql.cj.jdbc.Driver
    username: root
    password: 123456
  jpa:
    generate-ddl: true
    show-sql: true
    open-in-view: true
    database: mysql
  # SpringCloud
  cloud:
    zookeeper:
      connect-string: 192.168.237.100:2181

# 微服务info内容详细信息
info:
  app.name: xxx
  company.name: xxx
  build.artifactId: $project.artifactId$
  build.version: $project.version$

2.3 在启动类上标注@EnableDiscoveryClient注解

package com.sunxiaping.product;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

@SpringBootApplication
@EnableDiscoveryClient //该注解用于向使用Consul或者zookeeper作为注册中心时注册服务
public class Product9001Application {
    public static void main(String[] args) {
        SpringApplication.run(Product9001Application.class, args);
    }
}

2.4 ProductController

package com.sunxiaping.product.controller;

import com.sunxiaping.product.domain.Product;
import com.sunxiaping.product.service.ProductService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.*;

@RestController
@RequestMapping(value = "/product")
public class ProductController {

    @Value("${server.port}")
    private String port;

    @Value("${spring.cloud.client.ip-address}")
    private String ip;

    @Autowired
    private ProductService productService;

    @PostMapping(value = "/save")
    public String save(@RequestBody Product product) {
        productService.save(product);
        return "新增成功";
    }

    @GetMapping(value = "/findById/{id}")
    public Product findById(@PathVariable(value = "id") Long id) {
        Product product = productService.findById(id);
        product.setProductName("访问的地址是：" + ip + ":" + port);
        return product;
    }
}

3 服务消费者注册到Zookeeper

3.1 导入相关jar包的Maven坐标

  • 修改部分：
<!--   SpringCloud整合zookeeper     -->
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
    <!--排除zk3.5.3-->
    <exclusions>
        <exclusion>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
        </exclusion>
    </exclusions>
</dependency>
<dependency>
    <groupId>org.apache.zookeeper</groupId>
    <artifactId>zookeeper</artifactId>
    <version>3.4.10</version>
    <exclusions>
        <exclusion>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
        </exclusion>
    </exclusions>
</dependency>
  • 完整部分：
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns="http://maven.apache.org/POM/4.0.0"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>spring_cloud_demo</artifactId>
        <groupId>org.sunxiaping</groupId>
        <version>1.0</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>order_service_zookeeper8001</artifactId>
    <dependencies>
        <!--   SpringCloud整合zookeeper     -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
            <!--排除zk3.5.3-->
            <exclusions>
                <exclusion>
                    <groupId>org.apache.zookeeper</groupId>
                    <artifactId>zookeeper</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.4.10</version>
            <exclusions>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-log4j12</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</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>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
    </dependencies>

</project>

3.2 application.yml

  • 修改部分：
spring: 
 # SpringCloud
  cloud:
    zookeeper:
      connect-string: 192.168.237.100:2181
  • 完整部分：
server:
  port: 8001 # 微服务的端口号

spring:
  application:
    name: service-order # 微服务的名称
  # SpringCloud
  cloud:
    zookeeper:
      connect-string: 192.168.237.100:2181


# 微服务info内容详细信息
info:
  app.name: xxx
  company.name: xxx
  build.artifactId: $project.artifactId$
  build.version: $project.version$

# 开启日志debug
logging:
  level:
    root: info

3.3 在Spring容器中注入RestTemplate

  • SpringConfig.java
package com.sunxiaping.order.config;

import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;

@Configuration
public class SpringConfig {

    @Bean
    @LoadBalanced
    public RestTemplate restTemplate() {
        return new RestTemplate();
    }
}

3.4 在启动类上标注@EnableDiscoveryClient注解

package com.sunxiaping.order;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;


@SpringBootApplication
@EnableDiscoveryClient
public class Order8001Application {
    public static void main(String[] args) {
        SpringApplication.run(Order8001Application.class, args);
    }
}

3.5 OrderController

package com.sunxiaping.order.controller;


import com.sunxiaping.order.domain.Product;
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.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

@RestController
@RequestMapping(value = "/order")
public class OrderController {
    @Autowired
    private RestTemplate restTemplate;


    /**
     * 使用OrderCommand调用远程远程服务
     *
     * @param id
     * @return
     */
    @GetMapping(value = "/buy/{id}")
    public Product buy(@PathVariable(value = "id") Long id) {
        return restTemplate.getForObject("http://service-product/product/findById/" + id, Product.class);
    }
}
posted @ 2020-10-01 19:39  许大仙  阅读(418)  评论(0)  编辑  收藏  举报