服务提供者
创建一个名为 hello-dubbo-nacos-provider 的服务提供者项目
POM
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<? 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 http://maven.apache.org/xsd/maven-4.0.0.xsd" >
< modelVersion >4.0.0</ modelVersion >
< parent >
< groupId >org.springframework.boot</ groupId >
< artifactId >spring-boot-starter-parent</ artifactId >
< version >2.1.6.RELEASE</ version >
< relativePath /> <!-- lookup parent from repository -->
</ parent >
< groupId >com.antoniopeng</ groupId >
< artifactId >hello-dubbo-nacos-provider</ artifactId >
< packaging >pom</ packaging >
< modules >
< module >hello-dubbo-nacos-provider-api</ module >
< module >hello-dubbo-nacos-provider-service</ module >
</ modules >
</ project >
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该项目下有两个子模块,分别是 hello-dubbo-nacos-provider-api 和 hello-dubbo-nacos-provider-service,前者用于定义接口,后者用于实现接口。
服务提供者接口模块
在服务提供者项目下创建一个名为 hello-dubbo-nacos-provider-api 的模块, 该项目模块只负责 定义接口
POM
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<? 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 http://maven.apache.org/xsd/maven-4.0.0.xsd" >
< modelVersion >4.0.0</ modelVersion >
< parent >
< groupId >com.antoniopeng</ groupId >
< artifactId >hello-dubbo-nacos-provider</ artifactId >
< version >0.0.1-SNAPSHOT</ version >
</ parent >
< artifactId >hello-dubbo-nacos-provider-api</ artifactId >
< packaging >jar</ packaging >
</ project >
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定义一个接口
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public interface EchoService {
String echo(String string);
}
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服务提供者接口实现模块
创建名为 hello-dubbo-nacos-provider-service 服务提供者接口的实现模块,用于实现在接口模块中定义的接口。
引入依赖
在 pom.xml 中主要添加以下依赖
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<!-- Nacos And Dubbo-->
< dependency >
< groupId >org.apache.dubbo</ groupId >
< artifactId >dubbo-spring-boot-starter</ artifactId >
</ dependency >
< dependency >
< groupId >org.apache.dubbo</ groupId >
< artifactId >dubbo</ artifactId >
</ dependency >
< dependency >
< groupId >org.apache.dubbo</ groupId >
< artifactId >dubbo-serialization-kryo</ artifactId >
</ dependency >
< dependency >
< groupId >com.alibaba</ groupId >
< artifactId >dubbo-registry-nacos</ artifactId >
</ dependency >
< dependency >
< groupId >com.alibaba.nacos</ groupId >
< artifactId >nacos-client</ artifactId >
</ dependency >
< dependency >
< groupId >com.alibaba.spring</ groupId >
< artifactId >spring-context-support</ artifactId >
</ dependency >
<!-- 依赖接口模块,用于实现接口 -->
< dependency >
< groupId >com.antoniopeng</ groupId >
< artifactId >hello-dubbo-nacos-provider-api</ artifactId >
< version >${project.parent.version}</ version >
</ dependency >
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相关配置
在 application.yml 中加入相关配置
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spring:
application:
name: dubbo-nacos-provider
main:
allow-bean-definition-overriding: true
dubbo:
scan:
# 接口扫描路径
base-packages: com.antoniopeng.hello.dubbo.nacos.provider.service
protocol:
name: dubbo
# -1 代表自动分配端口
port: -1
# 配置高速序列化规则
serialization: kryo
registry:
# 服务注册地址,也就是 Nacos 的服务器地址
address: nacos: //192 .168.127.132:8848
provider:
# 配置负载均衡策略(轮询)
loadbalance: roundrobin
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附:Duubo 负载均衡策略
- random:随机
- roundrobin:轮询
- leastactive:最少活跃数
- consistenthash:一致性 Hash
实现接口
通过 org.apache.dubbo.config.annotation 包下的 @Service 注解将接口暴露出去
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import com.antoniopeng.hello.dubbo.nacos.provider.api.EchoService;
import org.apache.dubbo.config.annotation.Service;
@Service (version = "1.0.0" )
public class EchoServiceImpl implements EchoService {
@Override
public String echo(String string) {
return "Echo Hello Dubbo " + string;
}
}
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注意:@Service 注解要注明 version 属性
验证是否成功
启动项目,通过浏览器访问Nacos Server 网址 http://192.168.127.132:8848/nacos ,会发现有一个服务已经注册在服务列表中。
服务消费者
创建一个名为 hello-dubbo-nacos-consumer 的服务消费者项目
引入依赖
同样在 pom.xml中添加以下主要依赖
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<!-- Nacos And Dubbo -->
< dependency >
< groupId >org.apache.dubbo</ groupId >
< artifactId >dubbo-spring-boot-starter</ artifactId >
</ dependency >
< dependency >
< groupId >org.apache.dubbo</ groupId >
< artifactId >dubbo-serialization-kryo</ artifactId >
</ dependency >
< dependency >
< groupId >org.apache.dubbo</ groupId >
< artifactId >dubbo-spring-boot-actuator</ artifactId >
</ dependency >
< dependency >
< groupId >org.apache.dubbo</ groupId >
< artifactId >dubbo</ artifactId >
</ dependency >
< dependency >
< groupId >com.alibaba</ groupId >
< artifactId >dubbo-registry-nacos</ artifactId >
</ dependency >
< dependency >
< groupId >com.alibaba.nacos</ groupId >
< artifactId >nacos-client</ artifactId >
</ dependency >
< dependency >
< groupId >com.alibaba.spring</ groupId >
< artifactId >spring-context-support</ artifactId >
</ dependency >
<!-- 依赖服务提供者接口模块,用于调用接口 -->
< dependency >
< groupId >com.antoniopeng</ groupId >
< artifactId >hello-dubbo-nacos-provider-api</ artifactId >
< version >${project.parent.version}</ version >
</ dependency >
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相关配置
在 application.yml 中添加以下配置
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spring:
application:
name: dubbo-nacos-consumer
main:
allow-bean-definition-overriding: true
dubbo:
scan:
# 配置 Controller 扫描路径
base-packages: com.antoniopeng.dubbo.nacos.consumer.controller
protocol:
name: dubbo
port: -1
registry:
address: nacos: //192 .168.127.132:8848
server:
port: 8080
# 服务监控检查
endpoints:
dubbo:
enabled: true
management:
health:
dubbo:
status:
defaults: memory
extras: threadpool
endpoints:
web:
exposure:
include: "*"
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Controller
通过 org.apache.dubbo.config.annotation 包下的 @Reference 注解以 RPC 通信的方式调用服务,而对外提供以 HTTP 通信的方式的 Restful API
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import com.antoniopeng.dubbo.nacos.provider.api.EchoService;
import org.apache.dubbo.config.annotation.Reference;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class EchoController {
@Reference (version = "1.0.0" )
private EchoService echoService;
@GetMapping (value = "/echo/{string}" )
public String echo( @PathVariable String string) {
return echoService.echo(string);
}
}
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验证是否成功
通过浏览器访问 Nacos Server 网址 http:192.168.127.132:8848/nacos ,会发现又多了一个服务在服务列表中。
然后再访问服务消费者对外提供的 RESTful API http://localhost:8080/echo/hi,浏览器会响应以下内容:
Echo Hello Dubbo hi
到此,实现了 Nacos 与 Dubbo 的融合。
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:https://www.cnblogs.com/antoniopeng/p/12687715.html