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文章目錄

??一、版本選取、需求和項(xiàng)目簡述??

??1. 版本選取??
??2. 項(xiàng)目模塊說明??
??2. 需求說明??

??二、需求實(shí)戰(zhàn)-依賴初始化??

??2.1. 創(chuàng)建maven父工程EShopParent??
??2.2. 創(chuàng)建子模塊DubboApi??
??2.3. 創(chuàng)建服務(wù)端Stock-serv??
??2.4. 創(chuàng)建服務(wù)端product-serv??
??2.5. 創(chuàng)建消費(fèi)端端Order-serv??

??三、需求實(shí)戰(zhàn)-代碼編寫??

??3.1. 創(chuàng)建公共接口??
??3.2. 扣庫存服務(wù)端編寫??
??3.3. 產(chǎn)品服務(wù)端編寫??
??3.5. 消費(fèi)端編寫??

??四、需求實(shí)戰(zhàn)-配置編寫??

??4.1. 扣庫存服務(wù)端配置??
??4.2. 產(chǎn)品服務(wù)端配置??
??4.3.消費(fèi)端配置??

??五、需求測試實(shí)戰(zhàn)??

??5.1. 啟動(dòng)nacos??
??5.2. 啟動(dòng)服務(wù)端??
??5.3. 啟消費(fèi)端??
??5.4. 查看nacos??
??5.5. 項(xiàng)目模塊分布結(jié)構(gòu)??

??六、測試實(shí)戰(zhàn)??

??6.1. 請求扣庫存鏈路??
??6.2. 請求產(chǎn)品鏈路??
??6.3. 常見的異常??

一、版本選取、需求和項(xiàng)目簡述

1. 版本選取

框架	版本	說明
spring-cloud-alibaba	2.2.6.RELEASE	版本要對(duì)應(yīng)
spring-boot	2.3.2.RELEASE	版本要對(duì)應(yīng)
nacos	1.4.2	版本要對(duì)應(yīng)
org.apache.dubbo	2.7.8	版本要對(duì)應(yīng)

2. 項(xiàng)目模塊說明

模塊	說明
EShopParent	父工程
DubboApi	接口子模塊
Order-serv	訂單模塊
Stock-serv	扣庫存模塊
product-serv	產(chǎn)品模塊

2. 需求說明

訂單模塊調(diào)用扣庫存模塊完成庫庫存的業(yè)務(wù)

二、需求實(shí)戰(zhàn)-依賴初始化

2.1. 創(chuàng)建maven父工程EShopParent

<?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.gblfy</groupId>
    <artifactId>EShopParent</artifactId>
    <packaging>pom</packaging>
    <version>1.0-SNAPSHOT</version>
    <modules>
        <module>Order-serv</module>
        <module>Stock-serv</module>
        <module>DubboApi</module>
        <module>product-serv</module>
    </modules>
    <description>父工程 所有子工程需要依賴此工程</description>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.2.RELEASE</version>
    </parent>

    <dependencies>
        <!--springMVC啟動(dòng)器-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!--nacos服務(wù)發(fā)現(xiàn)-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>
        <!--dubbo組件-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-dubbo</artifactId>
        </dependency>
    </dependencies>
    <dependencyManagement>
        <dependencies>
            <!--spring-cloud-alibaba依賴版本控制-->
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>2.2.6.RELEASE</version>
                <scope>import</scope>
                <type>pom</type>
            </dependency>
        </dependencies>
    </dependencyManagement>
</project>

2.2. 創(chuàng)建子模塊DubboApi

<?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>EShopParent</artifactId>
        <groupId>com.gblfy</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>DubboApi</artifactId>

</project>

2.3. 創(chuàng)建服務(wù)端Stock-serv

<?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>EShopParent</artifactId>
        <groupId>com.gblfy</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>Stock-serv</artifactId>
    <dependencies>
        <dependency>
            <groupId>com.gblfy</groupId>
            <artifactId>DubboApi</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
    </dependencies>

</project>

2.4. 創(chuàng)建服務(wù)端product-serv

<?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>EShopParent</artifactId>
        <groupId>com.gblfy</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>product-serv</artifactId>

    <dependencies>
        <dependency>
            <groupId>com.gblfy</groupId>
            <artifactId>DubboApi</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
    </dependencies>
</project>

2.5. 創(chuàng)建消費(fèi)端端Order-serv

<?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>EShopParent</artifactId>
        <groupId>com.gblfy</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>

    <groupId>com.gblfy</groupId>
    <artifactId>Order-serv</artifactId>
    <modelVersion>4.0.0</modelVersion>

    <dependencies>
        <dependency>
            <groupId>com.gblfy</groupId>
            <artifactId>DubboApi</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
    </dependencies>


</project>

三、需求實(shí)戰(zhàn)-代碼編寫

3.1. 創(chuàng)建公共接口

在DubboApi子模塊中創(chuàng)建調(diào)用扣庫存模塊（Stock-serv）的接口IStockService

package com.gblfy.stock.api;

public interface IStockService {
    public String reduce(Integer productId, Integer userId);
}

在DubboApi子模塊中創(chuàng)建調(diào)用產(chǎn)品（product-serv）模塊的接口

package com.gblfy.product.api;

public interface IProductService {
    public String buyProduct(Integer productId, Integer userId);
}

3.2. 扣庫存服務(wù)端編寫

在Stock-serv子模塊中實(shí)現(xiàn)接口實(shí)現(xiàn)類StockServiceimpl

package com.gblfy.service.impl;

import com.gblfy.stock.api.IStockService;
import org.apache.dubbo.config.annotation.DubboService;

@DubboService
public class StockServiceimpl implements IStockService {

    @Override
    public String reduce(Integer productId, Integer userId) {
        return "用戶編號(hào):   " + userId + "產(chǎn)品編碼:   " + productId + "減庫存1個(gè)";
    }
}

啟動(dòng)類上添加@EnableDiscoveryClient注解

package com.gblfy;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

@EnableDiscoveryClient
@SpringBootApplication
public class StockApplication {
    public static void main(String[] args) {
        SpringApplication.run(StockApplication.class);
    }
}

3.3. 產(chǎn)品服務(wù)端編寫

在product-serv子模塊中實(shí)現(xiàn)接口實(shí)現(xiàn)類ProductServiceImpl

package com.gblfy.service.impl;

import com.gblfy.product.api.IProductService;
import org.apache.dubbo.config.annotation.DubboService;

@DubboService
public class ProductServiceImpl implements IProductService {

    @Override
    public String buyProduct(Integer productId, Integer userId) {
        return "用戶編號(hào):   " + userId + "產(chǎn)品編碼:   " + productId + "購買PHONE SUCCESS";
    }
}

啟動(dòng)類添加@EnableDiscoveryClient注解

package com.gblfy;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

@SpringBootApplication
@EnableDiscoveryClient
public class ProductApplication {

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

3.5. 消費(fèi)端編寫

在Order-serv子模塊的啟動(dòng)類上添加@EnableDiscoveryClient開啟服務(wù)發(fā)現(xiàn)掃描

package com.gblfy;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;


@SpringBootApplication
@EnableDiscoveryClient
public class OrderAppliaction {

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

創(chuàng)建一個(gè)客戶端類發(fā)起請求OrderController分別向扣庫存模塊和產(chǎn)品模塊發(fā)起請求

package com.gblfy.controller;

import com.gblfy.product.api.IProductService;
import com.gblfy.stock.api.IStockService;
import org.apache.dubbo.config.annotation.DubboReference;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;


@RestController
public class OrderController {

    @DubboReference
    private IStockService stockService;
    @DubboReference
    private IProductService productService;

    @GetMapping("/order/create")
    public String createOrder(Integer productId, Integer userId) {
        //調(diào)用扣庫存模塊服務(wù)
        return stockService.reduce(productId, userId);
    }
    //http://127.0.0.1:8080/order/create?productId=2&userId=8

    @GetMapping("/buyProduct")
    public String buyProduct(Integer productId, Integer userId) {
        //調(diào)用產(chǎn)品模塊服務(wù)
        return productService.buyProduct(productId, userId);
    }
    // http://127.0.0.1:8080/buyProduct?productId=2&userId=8
}

四、需求實(shí)戰(zhàn)-配置編寫

4.1. 扣庫存服務(wù)端配置

# 應(yīng)用端口
server:
  port: 8082

# nacos服務(wù)發(fā)現(xiàn)配置
spring:
  cloud:
    nacos:
      server-addr: 127.0.0.1:8848
      discovery:
        service: stock-serv
  application:
    name: stock-serv

# Dubbo服務(wù)配置

4.2. 產(chǎn)品服務(wù)端配置

server:
  port: 8081
spring:
  cloud:
    nacos:
      server-addr: 127.0.0.1:8848
      discovery:
        service: product-serv
  application:
    name: product-serv

# Dubbo服務(wù)配置

4.3.消費(fèi)端配置

server:
  port: 8080
spring:
  application:
    name: order-serv
  cloud:
    nacos:
      discovery:
        server-addr: http://127.0.0.1:8848
      config:
        server-addr: http://127.0.0.1:8848
        
# Dubbo服務(wù)配置