How to build Dubbo project with SpringBoot to implement the nth term of Fibonacci

step1 Create a new project

Method 1: Create a new project directly in IDEA as shown:

Method 2: Create a new

in start.spring.io. Some children may have discovered that the Server URL of the first method is the second website, which is the same.

To create two new projects, the first project is as shown in the picture above, and the second project only needs to change the provider to consumer

The rest remains unchanged, open it through IDEA after decompression

step2 Create the required packages, interfaces and implementation classes

provider project structure:

consumer project structure:

Please note that the locations of the two ServiceAPIs in the project, or the package names, must be strictly consistent, otherwise problems will occur later

If they are inconsistent, you can press them as needed as follows Make changes

xsd and place it in the specified directory:

C:\Users\username\.lemminx\cache\http\code. alibabatech.com\schema\dubbo

File:dubbo.xsd

#step3 Create a new configuration file under the resources of the two projects

The name that needs to be created is: spring-dubbo.xml

In the configuration file of provider, write:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
	   http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
    <!-- dubbo应用名称 -->
    <dubbo:application name="springboot-buddo-provider"/>
    <!-- 发布者 dubbo协议  -->
    <dubbo:protocol name="dubbo" port="20881"/>
    <!-- 定义bean -->
    <bean id="providerImpl" class="com.springdubbo.demo.springbootdubbo.apiImpl.ProviderImpl"/>
    <!-- dubbo服务 发布者发布服务  需要暴露的服务接口 -->
    <dubbo:service interface="com.springdubbo.demo.springbootdubbo.ServiceAPI" ref="providerImpl"
                   registry="N/A"/>
</beans>

In the configuration file of consumer, write:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
	   http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
    <!-- dubbo应用名称 -->
    <dubbo:application name="springboot-buddo-consumer"/>
    <!-- 远程服务调用代理 -->
    <dubbo:reference id="consumerImpl"
                     interface="com.springdubbo.demo.springbootdubbo.ServiceAPI"
                     url="dubbo://localhost:20881" />
</beans>

step4 Code writing

Import dependencies

Add dependencies under the pom.xml of both projects:

<dependency>
	<groupId>com.alibaba.spring.boot</groupId>
	<artifactId>dubbo-spring-boot-starter</artifactId>
	<version>2.0.0</version>
</dependency>

provider

ProviderImpl

Don’t forget to add the Service annotation, and it must be dubbo’s Service

package com.springdubbo.demo.springbootdubbo.apiImpl;
import com.alibaba.dubbo.config.annotation.Service;
import com.springdubbo.demo.springbootdubbo.ServiceAPI;
/**
 * @author wuyt
 * @data 2022/6/11
 * @apiNote
 */
@Service
public class ProviderImpl implements ServiceAPI {
    public String getMessage(String message) {
        return "springboot-dubbo-provider  =>>>>>" + message;
    }
    public String getTheFeibN(int n) {
        //斐波那契数列第n项的实现逻辑
    }
}

ServiceAPI

package com.springdubbo.demo.springbootdubbo;
/**
 * @author wuyt
 * @data 2022/6/11
 * @apiNote
 */
public interface ServiceAPI {
    public String getMessage(String message);
    public String getTheFeibN(int n);
}

SpringbootDubboApplication

Be sure to add the ImportResource annotation

package com.springdubbo.demo.springbootdubbo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ImportResource;
@SpringBootApplication
@ImportResource("classpath:spring-dubbo.xml")
public class SpringbootDubboApplication {
    public static void main(String[] args) {
        SpringApplication.run(SpringbootDubboApplication.class, args);
    }
}

consumer

ServiceAPI

package com.springdubbo.demo.springbootdubbo;
/**
 * @author wuyt
 * @data 2022/6/11
 * @apiNote
 */
public interface ServiceAPI {
    public String getMessage(String message);
    public String getTheFeibN(int n);
}

SpringbootDubboApplication

package com.springdubbo.demo.springbootdubbo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.annotation.ImportResource;
@SpringBootApplication
@ImportResource("classpath:spring-dubbo.xml")
public class SpringbootDubboApplication {
	public static void main(String[] args) {
		ConfigurableApplicationContext count = SpringApplication.run(SpringbootDubboApplication.class, args);
		ServiceAPI impl = (ServiceAPI)count.getBean("consumerImpl");
//		System.out.println(impl.getMessage("Hello dubbo"));
		System.out.println(impl.getTheFeibN(10));
	}
}

Port conflict change

You can modify the port number of either provider or consumer

Modify the port number of the consumer running here:

step5 Run

First run the provider, then run the consumer

Result:

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