Zookeeper Java开发

最新推荐文章于 2024-06-27 13:31:06 发布

原创最新推荐文章于 2024-06-27 13:31:06 发布 · 232 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#zookeeper #spring cloud

Spring Boot 专栏收录该内容

5 篇文章

订阅专栏

本文介绍如何使用Spring Cloud结合Zookeeper实现微服务架构。通过具体步骤演示了搭建微服务环境、配置服务注册与发现的过程，并展示了如何通过Feign实现服务间的调用。

依赖环境准备

搭建好集群环境后，创建Spring Boot项目，增加如下依赖

<properties>
	<spring.cloud-version>Hoxton.SR10</spring.cloud-version>
	<spring.zookeeper-version>2.2.4.RELEASE</spring.zookeeper-version>
	<spring.openfeign-version>2.2.7.RELEASE</spring.openfeign-version>
</properties>
<dependencyManagement>
	<dependencies>
	    <dependency>
	        <groupId>org.springframework.cloud</groupId>
	        <artifactId>spring-cloud-dependencies</artifactId>
	        <version>${spring.cloud-version}</version>
	        <type>pom</type>
	        <scope>import</scope>
	    </dependency>
	</dependencies>
</dependencyManagement>
<dependencies>
	<dependency>
	    <groupId>org.springframework.cloud</groupId>
	    <artifactId>spring-cloud-starter-config</artifactId>
	</dependency>
	<dependency>
	    <groupId>org.springframework.cloud</groupId>
	    <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
	    <version>${spring.zookeeper-version}</version>
	</dependency>
	<dependency>
	    <groupId>org.springframework.cloud</groupId>
	    <artifactId>spring-cloud-openfeign-core</artifactId>
	    <version>${spring.openfeign-version}</version>
	</dependency>
	<dependency>
	    <groupId>org.springframework.cloud</groupId>
	    <artifactId>spring-cloud-starter-openfeign</artifactId>
	</dependency>
</dependencies>

其中spring-cloud-starter-zookeeper-discovery是zookeeper注册发现的核心包，spring-cloud-openfeign-core和spring-cloud-starter-openfeign是用于获取zookeeper注册中心中的服务内容的核心包

在项目配置文件application.yml或boostrap.yml中增加如下配置

spring:
  application:
    name: centerm-framework-cloud
  cloud:
    config:
      enabled: false
    zookeeper:
      connect-string: 127.0.0.1:2181,127.0.0.1:2182,127.0.0.1:2183

其中spring.application.name是项目名称，同时也是注册中心的注册服务名，spring.cloud.zookeeper.connect-string配置单机或集群所有[IP:PORT]

代码Demo

在启动类上加上@EnableDiscoveryClient使接口会被扫描注册到zookeeper，加上@EnableFeignClients使项目可以获取zookeeper中注册的服务

创建注册服务类

@RestController
@RequestMapping("/centermdemo")
public class CentermDemoController {
	@GetMapping("/get")
	public String get() {
		return "My First Spring Cloud Zookeeper!";
	}
}

创建发现服务接口

@FeignClient(value = "centerm-framework-cloud", path="/centermdemo")
public interface CentermDemoFeignService {
    @GetMapping("/get")
    String get();
}

其中value = "centerm-framework-cloud"就是配置文件中spring.application.name的属性值，path="/centermdemo"对应CentermDemoController 中的@RequestMapping("/centermdemo")

创建验证服务接口

@RestController
@RequestMapping("/centermdemofeign")
public class CentermDemoFeignController {
    @Autowired
    private CentermDemoFeignService centermDemoFeignService;

    @GetMapping("/get")
    public JsonResponse<CentermDemo> get(@RequestBody CentermDemo entity) {
        return centermDemoFeignService.get(entity);
    }
}