ServiceComb微服务入门案例

其他 2020-04-01 10:38:05 阅读次数: 0

今天给大家分享一个华为的ServiceComb框架写的微服务，过多的话不说了，直接上干货部分。

ServiceComb需要有cse的注册中心，这里介绍如何使用docker快速的搭建一个。

docker pull servicecomb/service-center
docker run -d -p 30100:30100 servicecomb/service-center:latest

搭建成功后会在浏览器访问会有以上的输出，表明注册中心搭建成功。项目目录如下：

先来看看service-interfaces的部分

 

 其中RpcService如下：

package com.yuxuan.service;

/**
 *
 */
public interface RpcService {

    public String sayRpc(String name);

    /**
     * 转成大写字母
     * @param name
     * @return
     */
    public String strToUpper(String name);

}

interfaces项目中只有这一个接口类，这个项目主要用来放置公共的部分。

下面我们来看provider项目，服务的提供者：

RpcProviderApp类如下：

package com.yuxuan;

import org.apache.servicecomb.springboot.starter.provider.EnableServiceComb;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
@EnableServiceComb
public class RpcProviderApp {

    public static void main(String[] args) {

        SpringApplication.run(RpcProviderApp.class, args);
    }

}

RpcProviderServiceImpl如下：
package com.yuxuan.provider;

import com.yuxuan.service.RpcService;
import org.apache.servicecomb.provider.pojo.RpcSchema;

@RpcSchema(schemaId = "helloRpcSrv")
public class RpcProviderServiceImpl implements RpcService {
    @Override
    public String sayRpc(String name) {
        return "name " + name;
    }

    @Override
    public String strToUpper(String name) {
        return name == null ? "" : name.toUpperCase();
    }
}

application.properties 如下：

server.port=9981

microservice.yaml如下：

APPLICATION_ID: start.servicecomb.io
service_description:
  name: service-prvider-rpc
  version: 0.0.1
servicecomb:
  handler:
    chain:
      Provider: {}
  rest:
    address: 0.0.0.0:9080
  service:
    registry:
      address: http://127.0.0.1:30100
      autodiscovery: false #是否自动配置

pom.xml配置：

<?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">
    <parent>
        <artifactId>service-comb-t</artifactId>
        <groupId>com.yuxuan</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>service-provider</artifactId>

<dependencies>

    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-validator</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-rest</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

    <dependency>
        <groupId>org.apache.servicecomb</groupId>
        <artifactId>spring-boot-starter-provider</artifactId>
    </dependency>

    <dependency>
        <groupId>org.apache.servicecomb</groupId>
        <artifactId>transport-highway</artifactId>
    </dependency>

    <dependency>
        <groupId>org.apache.servicecomb</groupId>
        <artifactId>provider-pojo</artifactId>
    </dependency>


    <!--服务接口-->
    <dependency>
        <groupId>com.yuxuan</groupId>
        <artifactId>service-interfaces</artifactId>
        <version>1.0-SNAPSHOT</version>
    </dependency>

</dependencies>

</project>

下面我们来看 consumer 消费者项目：

RestConsumerApp如下：
package com.yuxuan;

import org.apache.servicecomb.springboot.starter.provider.EnableServiceComb;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.RestController;

@SpringBootApplication
@EnableServiceComb
public class RestConsumerApp {


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

    }
}

RestConsumerServiceImpl如下：
package com.yuxuan.service.impl;

import com.yuxuan.service.RpcService;
import org.apache.servicecomb.provider.pojo.RpcReference;
import org.springframework.stereotype.Component;

/**
 * rpc服务消费放
 */
@Component
public class RestConsumerServiceImpl implements RpcService {

    //从注册中心找
    @RpcReference(schemaId = "helloRpcSrv",microserviceName = "service-prvider-rpc")
    private RpcService rpcService;



    @Override
    public String sayRpc(String name) {
        return rpcService.sayRpc(name);
    }

    @Override
    public String strToUpper(String name) {
        return rpcService.strToUpper(name);
    }
}

RpcController如下：

package com.yuxuan.controller;

import com.yuxuan.service.RpcService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpMethod;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

/**
 * 对外发布的恐吓类
 */
@RestController
public class RpcController {

    @Autowired
    private RpcService rpcService;

    @RequestMapping(value = "rpc",method = RequestMethod.GET)
    public void rpcInvoke(){
        System.out.println(rpcService.sayRpc("rpc servicecomb "));
    }

    @RequestMapping(value = "upper",method = RequestMethod.GET)
    public String strToUpper(String str){
        return rpcService.strToUpper(str);
    }

}

application.properties

server.port=9980

microservice.yaml

APPLICATION_ID: start.servicecomb.io
service_description:
  name: rpc-servicecomb-consumer-rpc
  version: 0.0.1
servicecomb:
  handler:
    chain:
      Provider: {}
  rest:
    address: 0.0.0.0:9081
  service:
    registry:
      address: http://127.0.0.1:30100
      autodiscovery: false #是否自动配置

pom.xl

<?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">


    <parent>
        <artifactId>service-comb-t</artifactId>
        <groupId>com.yuxuan</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>

    <modelVersion>4.0.0</modelVersion>

    <artifactId>server-consumer</artifactId>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>

        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-validator</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-rest</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.apache.servicecomb</groupId>
            <artifactId>spring-boot-starter-provider</artifactId>
        </dependency>

        <!--RPC通信模型-->
        <dependency>
            <groupId>org.apache.servicecomb</groupId>
            <artifactId>transport-highway</artifactId>
        </dependency>

        <!--RPC编程模型-->
        <dependency>
            <groupId>org.apache.servicecomb</groupId>
            <artifactId>provider-pojo</artifactId>
        </dependency>


        <!--服务接口-->
        <dependency>
            <groupId>com.yuxuan</groupId>
            <artifactId>service-interfaces</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>



    </dependencies>


</project>

至此consumer项目完了，下面我们看看父pom文件的配置

<?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>

    <groupId>com.yuxuan</groupId>
    <artifactId>service-comb-t</artifactId>
    <packaging>pom</packaging>
    <version>1.0-SNAPSHOT</version>
    <modules>
        <module>service-interfaces</module>
        <module>service-provider</module>
        <module>server-consumer</module>
    </modules>


    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.2.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.apache.servicecomb</groupId>
                <artifactId>java-chassis-dependencies-springboot2</artifactId>
                <version>1.2.1</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
<!--            <plugin>-->
<!--                <groupId>org.springframework.boot</groupId>-->
<!--                <artifactId>spring-boot-maven-plugin</artifactId>-->
<!--                <version>2.1.2.RELEASE</version>-->
<!--                <executions>-->
<!--                    <execution>-->
<!--                        <goals>-->
<!--                            <goal>repackage</goal>-->
<!--                        </goals>-->
<!--                        <configuration>-->
<!--                            <outputDirectory>target/bin</outputDirectory>-->
<!--                            <classifier>exec</classifier>-->
<!--                        </configuration>-->
<!--                    </execution>-->
<!--                </executions>-->
<!--            </plugin>-->
<!--            <plugin>-->
<!--                <groupId>org.apache.maven.plugins</groupId>-->
<!--                <artifactId>maven-jar-plugin</artifactId>-->
<!--                <version>2.6</version>-->
<!--                <configuration>-->
<!--                    <archive>-->
<!--                        <manifestEntries>-->
<!--                            <Class-Path>.</Class-Path>-->
<!--                        </manifestEntries>-->
<!--                    </archive>-->
<!--                </configuration>-->
<!--            </plugin>-->
        </plugins>
    </build>

</project>

接下来先运行 provider，在运行consumer，在浏览器中输入 地址进行访问，如图：

以上就是整个项目的配置了，有问题可以在评论区评论，技术问题可以私信我。 

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