SpringCloud - 微服务之多模块化

其他 2020-04-11 18:05:33 阅读次数: 0

多模块

product-server 所有业务逻辑 controller、service……

product-client 对外暴露的接口、商品列表、扣库存。

product-common 公用的对象，既能被外部服务调用，也能被内部其他模块使用。

Ps：多模块最重要的难点就是 pom.xml 配置的问题。

5e5511b700019b1a19201080.jpg (1920×1080)

5bd5cdbe0001fc7f19201080.jpg (1920×1080)

 

Product 微服务项目

All Pom.xml

<?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.imooc</groupId>
	<artifactId>product</artifactId>
	<version>0.0.1-SNAPSHOT</version>
    <modules>
        <module>common</module>
        <module>server</module>
        <module>client</module>
    </modules>
    <packaging>pom</packaging>

	<name>product</name>
	<description>Demo project for Spring Boot</description>

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.0.0.M3</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
		<java.version>1.8</java.version>
		<spring-cloud.version>Finchley.M2</spring-cloud.version>
        <product-common.version>0.0.1-SNAPSHOT</product-common.version>
	</properties>
	
	<dependencyManagement>
		<dependencies>
			<dependency>
				<groupId>org.springframework.cloud</groupId>
				<artifactId>spring-cloud-dependencies</artifactId>
				<version>${spring-cloud.version}</version>
				<type>pom</type>
				<scope>import</scope>
			</dependency>
            <dependency>
                <groupId>com.imooc</groupId>
                <artifactId>product-common</artifactId>
                <version>${product-common.version}</version>
            </dependency>

			<dependency>
				<groupId>org.springframework.cloud</groupId>
				<artifactId>spring-cloud-starter-openfeign</artifactId>
				<version>2.0.0.M3</version>
			</dependency>
		</dependencies>
	</dependencyManagement>

	<repositories>
		<repository>
			<id>spring-snapshots</id>
			<name>Spring Snapshots</name>
			<url>https://repo.spring.io/snapshot</url>
			<snapshots>
				<enabled>true</enabled>
			</snapshots>
		</repository>
		<repository>
			<id>spring-milestones</id>
			<name>Spring Milestones</name>
			<url>https://repo.spring.io/milestone</url>
			<snapshots>
				<enabled>false</enabled>
			</snapshots>
		</repository>
	</repositories>

	<pluginRepositories>
		<pluginRepository>
			<id>spring-snapshots</id>
			<name>Spring Snapshots</name>
			<url>https://repo.spring.io/snapshot</url>
			<snapshots>
				<enabled>true</enabled>
			</snapshots>
		</pluginRepository>
		<pluginRepository>
			<id>spring-milestones</id>
			<name>Spring Milestones</name>
			<url>https://repo.spring.io/milestone</url>
			<snapshots>
				<enabled>false</enabled>
			</snapshots>
		</pluginRepository>
	</pluginRepositories>

</project>

Server

Pom.xml

<?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>product</artifactId>
        <groupId>com.imooc</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>product-server</artifactId>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>

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

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

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>

        <!-- 为了获取 common 的类 -->
        <dependency>
            <groupId>com.imooc</groupId>
            <artifactId>product-common</artifactId>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>
package com.imooc.product.controller;

import com.imooc.product.VO.ProductInfoVO;
import com.imooc.product.VO.ProductVO;
import com.imooc.product.VO.ResultVO;
import com.imooc.product.dataobject.ProductCategory;
import com.imooc.product.dataobject.ProductInfo;
import com.imooc.product.service.CategoryService;
import com.imooc.product.service.ProductService;
import com.imooc.product.utils.ResultVOUtil;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;

import com.imooc.product.common.DecreaseStockInput;
import com.imooc.product.common.ProductInfoOutput;

/**
 * 商品
 */
@RestController
@RequestMapping("/product")
public class ProductController {

    @Autowired
    private ProductService productService;

    @Autowired
    private CategoryService categoryService;

    /**
     * 1. 查询所有在架的商品
     * 2. 获取类目type列表
     * 3. 查询类目
     * 4. 构造数据
     */
    @GetMapping("/list")
    public ResultVO<ProductVO> list() {
        //1. 查询所有在架的商品
        List<ProductInfo> productInfoList = productService.findUpAll();

        //2. 获取类目type列表
        List<Integer> categoryTypeList = productInfoList.stream()
                .map(ProductInfo::getCategoryType)
                .collect(Collectors.toList());

        //3. 从数据库查询类目
        List<ProductCategory> categoryList = categoryService.findByCategoryTypeIn(categoryTypeList);

        //4. 构造数据
        List<ProductVO> productVOList = new ArrayList<>();
        for (ProductCategory productCategory: categoryList) {
            ProductVO productVO = new ProductVO();
            productVO.setCategoryName(productCategory.getCategoryName());
            productVO.setCategoryType(productCategory.getCategoryType());

            List<ProductInfoVO> productInfoVOList = new ArrayList<>();
            for (ProductInfo productInfo: productInfoList) {
                if (productInfo.getCategoryType().equals(productCategory.getCategoryType())) {
                    ProductInfoVO productInfoVO = new ProductInfoVO();
                    BeanUtils.copyProperties(productInfo, productInfoVO);
                    productInfoVOList.add(productInfoVO);
                }
            }
            productVO.setProductInfoVOList(productInfoVOList);
            productVOList.add(productVO);
        }

        return ResultVOUtil.success(productVOList);
    }

    /**
     * 获取商品列表(给订单服务用的)
     * @param productIdList
     * @return
     */
    @PostMapping("/listForOrder")
    public List<ProductInfoOutput> listForOrder(@RequestBody List<String> productIdList) {
        return productService.findList(productIdList);
    }

    @PostMapping("/decreaseStock")
    public void decreaseStock(@RequestBody List<DecreaseStockInput> decreaseStockInputList) {
        productService.decreaseStock(decreaseStockInputList);
    }
}
  • 这里能拿到 common 模块的类，是因为在 pom.xml 里引入了 common。 
package com.imooc.product;

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, args);
	}
}
  • server 模块这里应用配置也没过多的“添加剂”。 

Common

Pom.xml

<?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>product</artifactId>
        <groupId>com.imooc</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>product-common</artifactId>

    <dependencies>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
    </dependencies>
</project>
package com.imooc.product.common;

import lombok.Data;

/**
 * 减库存入参
 */
@Data
public class DecreaseStockInput {

    private String productId;

    private Integer productQuantity;

    public DecreaseStockInput() {
    }

    public DecreaseStockInput(String productId, Integer productQuantity) {
        this.productId = productId;
        this.productQuantity = productQuantity;
    }
}


package com.imooc.product.common;

import lombok.Data;
import java.math.BigDecimal;

@Data
public class ProductInfoOutput {

    private String productId;

    /** 名字. */
    private String productName;

    /** 单价. */
    private BigDecimal productPrice;

    /** 库存. */
    private Integer productStock;

    /** 描述. */
    private String productDescription;

    /** 小图. */
    private String productIcon;

    /** 状态, 0正常1下架. */
    private Integer productStatus;

    /** 类目编号. */
    private Integer categoryType;
}

Client

Pom.xml

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<?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>product</artifactId>
        <groupId>com.imooc</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>product-client</artifactId>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-netflix-core</artifactId>
        </dependency>

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

        <dependency>
            <groupId>com.imooc</groupId>
            <artifactId>product-common</artifactId>
        </dependency>
    </dependencies>
</project>
package com.imooc.product.client;

import com.imooc.product.common.DecreaseStockInput;
import com.imooc.product.common.ProductInfoOutput;
import org.springframework.cloud.netflix.feign.FeignClient;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import java.util.List;

@FeignClient(name = "product")
public interface ProductClient {

    @PostMapping("/product/listForOrder")
    List<ProductInfoOutput> listForOrder(@RequestBody List<String> productIdList);

    @PostMapping("/product/decreaseStock")
    void decreaseStock(@RequestBody List<DecreaseStockInput> decreaseStockInputList);
}

Order 微服务项目

All Pom.xml

<?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.imooc</groupId>
	<artifactId>order</artifactId>
	<version>0.0.1-SNAPSHOT</version>
    <modules>
        <module>client</module>
        <module>common</module>
        <module>server</module>
    </modules>
    <packaging>pom</packaging>

	<name>order</name>
	<description>Demo project for Spring Boot</description>

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.0.0.M3</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
		<java.version>1.8</java.version>
		<spring-cloud.version>Finchley.M2</spring-cloud.version>
        <product-client.version>0.0.1-SNAPSHOT</product-client.version>
        <order-common.version>0.0.1-SNAPSHOT</order-common.version>
	</properties>

	<dependencyManagement>
		<dependencies>
			<dependency>
				<groupId>org.springframework.cloud</groupId>
				<artifactId>spring-cloud-dependencies</artifactId>
				<version>${spring-cloud.version}</version>
				<type>pom</type>
				<scope>import</scope>
			</dependency>
            <dependency>
                <groupId>com.imooc</groupId>
                <artifactId>product-client</artifactId>
                <version>${product-client.version}</version>
            </dependency>
            <dependency>
                <groupId>com.imooc</groupId>
                <artifactId>order-common</artifactId>
                <version>${order-common.version}</version>
            </dependency>
			<dependency>
				<groupId>org.springframework.cloud</groupId>
				<artifactId>spring-cloud-starter-openfeign</artifactId>
				<version>2.0.0.M3</version>
			</dependency>
		</dependencies>
	</dependencyManagement>

	<repositories>
		<repository>
			<id>spring-snapshots</id>
			<name>Spring Snapshots</name>
			<url>https://repo.spring.io/snapshot</url>
			<snapshots>
				<enabled>true</enabled>
			</snapshots>
		</repository>
		<repository>
			<id>spring-milestones</id>
			<name>Spring Milestones</name>
			<url>https://repo.spring.io/milestone</url>
			<snapshots>
				<enabled>false</enabled>
			</snapshots>
		</repository>
	</repositories>

	<pluginRepositories>
		<pluginRepository>
			<id>spring-snapshots</id>
			<name>Spring Snapshots</name>
			<url>https://repo.spring.io/snapshot</url>
			<snapshots>
				<enabled>true</enabled>
			</snapshots>
		</pluginRepository>
		<pluginRepository>
			<id>spring-milestones</id>
			<name>Spring Milestones</name>
			<url>https://repo.spring.io/milestone</url>
			<snapshots>
				<enabled>false</enabled>
			</snapshots>
		</pluginRepository>
	</pluginRepositories>

</project>

Server

pom.xml

<?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>order</artifactId>
        <groupId>com.imooc</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>order-server</artifactId>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>

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

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

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>

        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-feign</artifactId>
        </dependency>

        <dependency>
            <groupId>com.imooc</groupId>
            <artifactId>product-client</artifactId>
        </dependency>

        <dependency>
            <groupId>com.imooc</groupId>
            <artifactId>order-common</artifactId>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>
package com.imooc.order;

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

@SpringBootApplication
@EnableDiscoveryClient
@EnableFeignClients(basePackages = "com.imooc.product.client")
public class OrderApplication {

	public static void main(String[] args) {
		SpringApplication.run(OrderApplication.class, args);
	}
}
  •  订单服务如果要调用商品服务的话，启动类的时候要加一个参数 @EnableFeignClients(basePackages = "com.imooc.product.client")，不调用是不会扫描的，不扫描就调用不了商品的接口。 这是为啥：因为product的client并没有注册到服务中心啊。
package com.imooc.order.service.impl;

import com.imooc.order.dataobject.OrderDetail;
import com.imooc.order.dataobject.OrderMaster;
import com.imooc.order.dto.OrderDTO;
import com.imooc.order.enums.OrderStatusEnum;
import com.imooc.order.enums.PayStatusEnum;
import com.imooc.order.repository.OrderDetailRepository;
import com.imooc.order.repository.OrderMasterRepository;
import com.imooc.order.service.OrderService;
import com.imooc.order.utils.KeyUtil;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.List;
import java.util.stream.Collectors;

import com.imooc.product.client.ProductClient;
import com.imooc.product.common.DecreaseStockInput;
import com.imooc.product.common.ProductInfoOutput;

@Service
public class OrderServiceImpl implements OrderService {

    @Autowired
    private OrderDetailRepository orderDetailRepository;

    @Autowired
    private OrderMasterRepository orderMasterRepository;

    @Autowired
    private ProductClient productClient;

    @Override
    public OrderDTO create(OrderDTO orderDTO) {
        String orderId = KeyUtil.genUniqueKey();

       //查询商品信息(调用商品服务)
        List<String> productIdList = orderDTO.getOrderDetailList().stream()
                .map(OrderDetail::getProductId)
                .collect(Collectors.toList());
        List<ProductInfoOutput> productInfoList = productClient.listForOrder(productIdList);

       //计算总价
        BigDecimal orderAmout = new BigDecimal(BigInteger.ZERO);
        for (OrderDetail orderDetail: orderDTO.getOrderDetailList()) {
            for (ProductInfoOutput productInfo: productInfoList) {
                if (productInfo.getProductId().equals(orderDetail.getProductId())) {
                    //单价*数量
                    orderAmout = productInfo.getProductPrice()
                            .multiply(new BigDecimal(orderDetail.getProductQuantity()))
                            .add(orderAmout);
                    BeanUtils.copyProperties(productInfo, orderDetail);
                    orderDetail.setOrderId(orderId);
                    orderDetail.setDetailId(KeyUtil.genUniqueKey());
                    //订单详情入库
                    orderDetailRepository.save(orderDetail);
                }
            }
        }

       //扣库存(调用商品服务)
        List<DecreaseStockInput> decreaseStockInputList = orderDTO.getOrderDetailList().stream()
                .map(e -> new DecreaseStockInput(e.getProductId(), e.getProductQuantity()))
                .collect(Collectors.toList());
        productClient.decreaseStock(decreaseStockInputList);

        //订单入库
        OrderMaster orderMaster = new OrderMaster();
        orderDTO.setOrderId(orderId);
        BeanUtils.copyProperties(orderDTO, orderMaster);
        orderMaster.setOrderAmount(orderAmout);
        orderMaster.setOrderStatus(OrderStatusEnum.NEW.getCode());
        orderMaster.setPayStatus(PayStatusEnum.WAIT.getCode());
        orderMasterRepository.save(orderMaster);
        return orderDTO;
    }
}

Common

pom.xml

<?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>order</artifactId>
        <groupId>com.imooc</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>order-common</artifactId>

    <dependencies>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
    </dependencies>
</project>

Client

pom.xml

<?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>order</artifactId>
        <groupId>com.imooc</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>order-client</artifactId>

</project>
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