最新版dubbo+SpringBoot整合入门

墨蓝 2022-02-01 13:36 203阅读 0赞

因为最近在面试过程中被问到太多关于你会不会dubbo和Spring Cloud的问题了，Spring Cloud的入门在之前已经尝试过了。因此今天自己根据教程撸了一遍入门。

## 生产者配置 ##

### pom.xml ###

<properties>
            <java.version>1.8</java.version>
            <spring-boot.version>2.1.4.RELEASE</spring-boot.version>
            <dubbo.version>2.7.1</dubbo.version>
            <curator.version>2.8.0</curator.version>
            <zookeeper.version>3.4.6</zookeeper.version>
        </properties>
    
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
    
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <optional>true</optional>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <scope>test</scope>
            </dependency>
    
    
            
            <dependency>
                <groupId>org.apache.dubbo</groupId>
                <artifactId>dubbo-spring-boot-starter</artifactId>
                <version>2.7.1</version>
            </dependency>
    
            <dependency>
                <groupId>org.apache.dubbo</groupId>
                <artifactId>dubbo</artifactId>
                <version>2.7.1</version>
            </dependency>
    
    
            
            <dependency>
                <groupId>org.apache.zookeeper</groupId>
                <artifactId>zookeeper</artifactId>
                <version>${zookeeper.version}</version>
                <exclusions>
                    <exclusion>
                        <groupId>org.slf4j</groupId>
                        <artifactId>slf4j-log4j12</artifactId>
                    </exclusion>
                    <exclusion>
                        <groupId>log4j</groupId>
                        <artifactId>log4j</artifactId>
                    </exclusion>
                    <exclusion>
                        <groupId>io.netty</groupId>
                        <artifactId>netty</artifactId>
                    </exclusion>
                </exclusions>
            </dependency>
    
            <dependency>
                <groupId>org.apache.curator</groupId>
                <artifactId>curator-framework</artifactId>
                <version>${curator.version}</version>
            </dependency>
            <dependency>
                <groupId>org.apache.curator</groupId>
                <artifactId>curator-recipes</artifactId>
                <version>${curator.version}</version>
            </dependency>
        </dependencies>
        <repositories>
            <repository>
                <id>apache.snapshots.https</id>
                <name>Apache Development Snapshot Repository</name>
                <url>https://repository.apache.org/content/repositories/snapshots</url>
                <releases>
                    <enabled>false</enabled>
                </releases>
                <snapshots>
                    <enabled>true</enabled>
                </snapshots>
            </repository>
        </repositories>

### application.properties ###

server.port=8082
    
    dubbo.application.name=first-dubbo-provider
    dubbo.scan.base-packages=com.zhao.dubbo.service
    
    dubbo.protocol.name=dubbo
    dubbo.protocol.port=20880
    dubbo.registry.address=zookeeper://127.0.0.1:2181

### 接口层 ###

*  接口声明

public interface GreetingService {
        String sayHello(String name);
    }

*  接口实现

import com.zhao.dubbo.service.GreetingService;
    import org.apache.dubbo.config.annotation.Service;
    import org.springframework.beans.factory.annotation.Value;
    
    
    @Service
    public class GreetingServiceImpl implements GreetingService {
        @Value("${dubbo.application.name}")
        private String serviceName;
        @Override
        public String sayHello(String name) {
            return String.format("[%s][%s] : Hello, %s", serviceName,"2", name);
    
        }
    }

但是dubbo官网推荐将接口层单独作为一个独立模块使用。然后生产者和消费者均依赖此模块进行操作，详情请见 [http://dubbo.apache.org/zh-cn/docs/user/quick-start.html][http_dubbo.apache.org_zh-cn_docs_user_quick-start.html]

在上述实现没有接口层模块时要特别注意，如果生产者和消费者没有使用同样的报名 ，可能会出现dubbo异常:Failed to check the status of the service . No provider available for the service。此时需要统一接口层的包名才可以正常运行

## 消费者配置 ##

### 接口层配置 ###

*  接口声明

public interface GreetingService {
        String sayHello(String name);
    }

与生产者完全一致

### pom配置 ###

同理pom.xml与生产者完全一致

### application.properties配置 ###

server.port=8081
    
    spring.application.name=first-dubbo-consumer
    dubbo.registry.address=zookeeper://127.0.0.1:2181

### 调用 ###

*  启动zookeeper  
    调用之前，我们需要将使用的zookeeper启动

我们直接在启动类中采用轮询式调用

import org.apache.dubbo.config.annotation.Reference;
    import org.springframework.boot.ApplicationRunner;
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.context.annotation.Bean;
    
    import java.util.concurrent.TimeUnit;
    
    @SpringBootApplication
    public class DubboConsumerApplication {
        @Reference
        private GreetingService greetingService;
        public static void main(String[] args) {
            SpringApplication.run(DubboConsumerApplication.class, args);
        }
        @Bean
        public ApplicationRunner runner(){
            int count = 0;
            while (true) {
                System.out.println(greetingService.sayHello("World "));
                try {
                    TimeUnit.SECONDS.sleep(3);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                count++;
                if (count == 100) {
                    break;
                }
            }
            return s -> {
                System.out.println(greetingService.sayHello("World"));
            };
        }
    }

即可发现，调用成功  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFvemhlbi5ibG9nLmNzZG4ubmV0_size_16_color_FFFFFF_t_70]

## dubbo-admin控制台 ##

首先在github上下载dubbo-admin项目。 地址 [https://github.com/apache/incubator-dubbo-admin/blob/develop/README\_ZH.md][https_github.com_apache_incubator-dubbo-admin_blob_develop_README_ZH.md]  
使用Eclipse或IDEA直接默认方式启动就可以了。  
然后使用npm安装前端包内的依赖包之后，使用npm run dev启动

使用 localhost:8081 进行访问  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFvemhlbi5ibG9nLmNzZG4ubmV0_size_16_color_FFFFFF_t_70 1]

即可发现我们的服务提供者已显示成功。

[http_dubbo.apache.org_zh-cn_docs_user_quick-start.html]: http://dubbo.apache.org/zh-cn/docs/user/quick-start.html
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFvemhlbi5ibG9nLmNzZG4ubmV0_size_16_color_FFFFFF_t_70]: /images/20220201/d5d80465230c47c49046a5206295ec5a.png
[https_github.com_apache_incubator-dubbo-admin_blob_develop_README_ZH.md]: https://github.com/apache/incubator-dubbo-admin/blob/develop/README_ZH.md
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFvemhlbi5ibG9nLmNzZG4ubmV0_size_16_color_FFFFFF_t_70 1]: /images/20220201/e88eb0a0323b459ead4a6c9803380115.png