SpringBoot 07: springboot中使用dubbo

公共接口项目

• 独立的maven项目：定义了接口和数据类

• 数据类

kage com.example.dubbo.model;

import java.io.Serializable;

public class Student  implements Serializable {
    private static final long serialVersionUID = -2375196479092045782L;
    private Integer id;
    private String name;
    private Integer age;

    @Override
    public String toString() {
        return "Student{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", age=" + age +
                '}';
    }

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    public Student(Integer id, String name, Integer age) {
        this.id = id;
        this.name = name;
        this.age = age;
    }

    public Student() {
    }
}

• 接口

package com.example.dubbo.service;

import com.example.dubbo.model.Student;

public interface StudentService {
    Student queryStudent(Integer id);
}

提供者

• springboot项目的pom.xml

  <!--加入公共接口项目的gav-->
        <dependency>
            <groupId>com.example.dubbo</groupId>
            <artifactId>oo14-springboot-dubbo-api</artifactId>
            <version>1.0.0</version>
        </dependency>

        <!--dubbo依赖-->
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>2.7.8</version>
        </dependency>


        <!--zookeeper依赖-->
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-dependencies-zookeeper</artifactId>
            <version>2.7.8</version>
            <type>pom</type>
            <exclusions>
                <!-- 排除log4j的依赖 防止日志冲突-->
                <exclusion>
                    <artifactId>slf4j-log4j12</artifactId>
                    <groupId>org.slf4j</groupId>
                </exclusion>
            </exclusions>
        </dependency>

• 实现接口

package com.example.service.impl;

import com.example.dubbo.model.Student;
import com.example.dubbo.service.StudentService;
import org.apache.dubbo.config.annotation.DubboService;

/**
 * 使用dubbo中的注解，对外暴露服务接口
 */
@DubboService(interfaceClass = StudentService.class, version = "1.0.0", timeout = 5000)
public class StudentServiceImpl implements StudentService {
    @Override
    public Student queryStudent(Integer id) {
        Student student = new Student();
        student.setId(id);
        student.setName("橘子");
        student.setAge(21);
        return student;
    }
}

• 在springboot的主启动类上添加注解@EnableDubbo，支持dubbo

package com.example;

import org.apache.dubbo.config.spring.context.annotation.EnableDubbo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
@EnableDubbo
public class ServiceProviderApplication {

    public static void main(String[] args) {
        SpringApplication.run(ServiceProviderApplication.class, args);
    }

}

• 在application.properties中配置服务提供者

#配置springboot中的dubbo服务者

#配置提供的服务名称
dubbo.application.name=student-service-provider

#配置需要扫描的包
dubbo.scan.base-packages=com.example.service

#配置注册中心
dubbo.registry.address=zookeeper://localhost:2181

消费者

• springboot项目的pom.xml, 和服务提供者的依赖相同

• 创建controller, 调用服务者提供的服务

package com.example.controller;

import com.example.dubbo.service.StudentService;
import org.apache.dubbo.config.annotation.DubboReference;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class StudentController {

    @DubboReference(interfaceClass = StudentService.class, version = "1.0.0")
    private StudentService studentService;

    @GetMapping("/student/query")
    public String queryStudent(Integer id){
        return studentService.queryStudent(id).toString();
    }
}

• 同样在springboot的主启动类上添加注解@EnableDubbo，支持dubbo
• 在application.properties中配置服务消费者

#springboot中配置dubbo消费者

#消费者名称
dubbo.application.name=student-service-consumer

#配置注册中心
dubbo.registry.address=zookeeper://localhost:2181

测试

• 先启动zookeeper注册中心，再启动服务的提供者和消费者