448 lines
12 KiB
Markdown
448 lines
12 KiB
Markdown
# mall4cloud项目新增一个微服务
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```
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说明: 本文以新增一个分销微服务(mall4cloud-distribution)项目模块为例子
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(默认已创建mall4cloud_distribution数据库)
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```
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> 总体上分为5步：
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>
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> 1. 新建mall4cloud-distribution微服务模块
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>
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> 2. 修改或者新增mall4cloud_distribution的pom.xml、bootstrap.yml、Dockerfile、启动类上注解
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>
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> 3. nacos上新增mall4cloud-distribution.yml文件，配置数据源；
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>
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> nacos上修改mall4cloud-gateway.yml文件配置路由；
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>
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> nacos上新增mall4cloud-distribution相关seata的配置;
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>
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> 4. 新建mall4cloud-api-distribution模块远程feign调用接口模块
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>
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> 5. mall4cloud-distribution引入mall4cloud-api-distribution模块，新增一些配置
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## 1. 新增项目
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a.在mall4cloud上右键 New -> Module
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b.我们要新增一个可以带启动类的项目，这里我们选择用springboot快速创建一个项目，选择Spring Initialiar
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c.点击 Next 下一步
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```
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Group: com.mall4j.cloud
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Artifact: mall4cloud-distribution
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Type: Maven
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Language: Java
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Packaging: Jar
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Java version: 8
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Version: 0.0.1-SNAPSHOT
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Name: distribution
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Description: mall4cloud 分销服务
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Package: com.mall4j.cloud.distribution
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```
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d.点击 Next 下一步，这里我们不需要选择任何依赖，我们需要在项目新增完成后，手动添加修改依赖
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e.点击 Next 下一步
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```
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Module Name: mall4cloud-distribution
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Content root: 这个会根据 Module Name 自动修改。
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Module file location: 这个会根据 Module Name 自动修改
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```
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最后点击 Finish 等待项目创建，创建完成的项目如下所示
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## 2.修改项目mall4cloud-distribution
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a.我们需要删除掉一些文件和.mvn、test文件夹：
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```
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.mvn
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application.properties
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test
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.gitignore
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HELP.md
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mvnw
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mvnw.cmd
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```
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删除完成后的结果如下图所示
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b.修改mall4cloud-distribution的pom.xml文件, 依赖可根据实际需要引入或者删除，pom.xml修改后如下所示
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```
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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
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<parent>
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<artifactId>mall4cloud</artifactId>
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<groupId>com.mall4j.cloud</groupId>
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<version>0.0.1</version>
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</parent>
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<modelVersion>4.0.0</modelVersion>
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<artifactId>mall4cloud-distribution</artifactId>
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<description>mall4cloud 分销服务</description>
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<packaging>jar</packaging>
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<dependencies>
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<!--注册中心客户端-->
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<dependency>
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<groupId>com.alibaba.cloud</groupId>
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<artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
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</dependency>
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<dependency>
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<groupId>com.alibaba.cloud</groupId>
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<artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
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</dependency>
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<dependency>
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<groupId>com.mall4j.cloud</groupId>
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<artifactId>mall4cloud-common-database</artifactId>
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<version>${project.version}</version>
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</dependency>
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<dependency>
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<groupId>com.mall4j.cloud</groupId>
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<artifactId>mall4cloud-common-security</artifactId>
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<version>${project.version}</version>
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</dependency>
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<dependency>
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<groupId>com.mall4j.cloud</groupId>
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<artifactId>mall4cloud-api-product</artifactId>
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<version>${project.version}</version>
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</dependency>
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<dependency>
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<groupId>com.mall4j.cloud</groupId>
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<artifactId>mall4cloud-api-search</artifactId>
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<version>${project.version}</version>
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</dependency>
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<dependency>
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<groupId>com.mall4j.cloud</groupId>
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<artifactId>mall4cloud-api-platform</artifactId>
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<version>${project.version}</version>
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</dependency>
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<dependency>
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<groupId>com.mall4j.cloud</groupId>
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<artifactId>mall4cloud-api-multishop</artifactId>
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<version>${project.version}</version>
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</dependency>
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<dependency>
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<groupId>com.mall4j.cloud</groupId>
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<artifactId>mall4cloud-api-order</artifactId>
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<version>${project.version}</version>
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</dependency>
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<dependency>
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<groupId>com.mall4j.cloud</groupId>
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<artifactId>mall4cloud-api-delivery</artifactId>
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<version>${project.version}</version>
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</dependency>
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<dependency>
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<groupId>com.mall4j.cloud</groupId>
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<artifactId>mall4cloud-common-rocketmq</artifactId>
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<version>${project.version}</version>
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</dependency>
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<dependency>
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<groupId>com.xuxueli</groupId>
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<artifactId>xxl-job-core</artifactId>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-maven-plugin</artifactId>
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</plugin>
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<plugin>
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<groupId>io.fabric8</groupId>
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<artifactId>docker-maven-plugin</artifactId>
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<configuration>
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<skip>false</skip>
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</configuration>
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</plugin>
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</plugins>
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</build>
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</project>
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```
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在mall4cloud的pom.xml的modules里面添加mall4cloud-distribution模块
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```
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<modules>
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<module>mall4cloud-distribution</module>
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</modules>
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```
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c. 新增bootstrap.yml文件，并且配置好项目的端口、名称以及nacos注册中心的地址
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d. 修改启动类上的启动配置
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```
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@SpringBootApplication(scanBasePackages = { "com.mall4j.cloud" },exclude = UserDetailsServiceAutoConfiguration.class)
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@EnableFeignClients(basePackages = {"com.mall4j.cloud.**.feign"})
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```
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e. 先去nacos上面新增一个mall4cloud-distribution.yml配置文件，并且配置好数据源
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```yaml
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Data ID: mall4cloud-distribution.yml
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Group: DEFAULT_GROUP
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配置格式： YAML
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配置内容：
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#数据源
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spring:
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datasource:
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url: jdbc:mysql://192.168.193.128:3306/mall4cloud_distribution?characterEncoding=utf8&zeroDateTimeBehavior=convertToNull&useSSL=FALSE&useJDBCCompliantTimezoneShift=TRUE&useLegacyDatetimeCode=FALSE&serverTimezone=GMT%2B8&allowMultiQueries=true&rewriteBatchedStatements=true&allowPublicKeyRetrieval=TRUE&useAffectedRows=TRUE
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username: root
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PASSWORD: root
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```
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f.新增完成后，我们需要在我们的网关mall4cloud-gateway，配置一下mall4cloud-distribution的路由，在nacos上找到我们的mall4cloud-gateway.yml文件，新增mall4cloud-distribution路由配置
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```yaml
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- id: mall4cloud-distribution
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uri: lb://mall4cloud-distribution
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predicates:
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- Path=/mall4cloud_distribution/**
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filters:
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- RewritePath=/mall4cloud_distribution(?<segment>/?.*), $\{segment}
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```
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j.我们引入了seata，所以 还需要在nacos的application.yml上配置seata
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```
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seata:
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enableAutoDataSourceProxy: false
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config:
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type: nacos
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nacos:
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namespace: nacos中seata的命名空间id
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dataId: "seataServer.properties"
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server-addr: ${spring.cloud.nacos.discovery.server-addr}
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password: ${spring.cloud.nacos.discovery.password}
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username: ${spring.cloud.nacos.discovery.username}
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registry:
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type: nacos
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nacos:
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server-addr: ${spring.cloud.nacos.discovery.server-addr}
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password: ${spring.cloud.nacos.discovery.password}
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username: ${spring.cloud.nacos.discovery.username}
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namespace: ${seata.config.nacos.namespace}
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```
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我们尝试启动，如果启动成功且服务没有打印错误日志，我们这个微服务基本上是创建成功了。
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接下来，我们需要完善一些服务需要的其他内容
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## 3.新增远程调用api
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```
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就我们的项目结构设计而言，我们把feign远程调用的接口都抽取了出来，放在了mall4cloud-api这个模块下面，所以我们要新增一个mall4cloud-api-distribution模块
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```
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a.在mall4cloud-api上右键 New -> Module
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b.我们只是新增一个模块，这个地方不需要启动类，所以我们这里创建一个maven就好了
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c.点击 Next 下一步
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```
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Parent: mall4cloud-api // 选择mall4cloud-api
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Name: mall4cloud-api-distribution
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Lacation: 自动填写
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GroupId: com.mall4j.cloud.api
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Artifactld: mall4cloud-api-distribution
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Version: 0.01
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```
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4.点击 Finish ，创建完成后如图所示
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删除test、resource文件夹，修改pom.xml文件，新增mall4cloud-api-distribution的feign接口
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修改后的pom.xml文件
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```
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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<parent>
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<artifactId>mall4cloud-api</artifactId>
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<groupId>com.mall4j.cloud</groupId>
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<version>0.0.1</version>
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</parent>
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<modelVersion>4.0.0</modelVersion>
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<artifactId>mall4cloud-api-distribution</artifactId>
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<packaging>jar</packaging>
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<description>分销对内接口</description>
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<dependencies>
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<dependency>
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<groupId>com.mall4j.cloud</groupId>
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<artifactId>mall4cloud-common-order</artifactId>
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<version>${project.version}</version>
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</dependency>
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<dependency>
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<groupId>com.mall4j.cloud</groupId>
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<artifactId>mall4cloud-common-product</artifactId>
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<version>${project.version}</version>
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</dependency>
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</dependencies>
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</project>
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```
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新增的DistributionFeignClient.class类
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接口上要加上注解@FeignClient(value = "mall4cloud-distribution",contextId ="distribution")
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```
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package com.mall4j.cloud.api.distribution.feign;
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import org.springframework.cloud.openfeign.FeignClient;
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/**
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* @author cl
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* @date 2021-08-05 16:07:34
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*/
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@FeignClient(value = "mall4cloud-distribution",contextId ="distribution")
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public interface DistributionFeignClient {
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}
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```
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## 4.完善mall4cloud-distribution的配置和feign接口实现
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在mall4cloud-distribution项目引入mall4cloud-api-distribution
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```xml
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<dependency>
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<groupId>com.mall4j.cloud</groupId>
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<artifactId>mall4cloud-api-distribution</artifactId>
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<version>${project.version}</version>
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</dependency>
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```
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DistributionFeignController来实现DistributionFeignClient接口
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```
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public class DistributionFeignController implements DistributionFeignClient {
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}
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```
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添加Swagger文档配置SwaggerConfiguration.class
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```java
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/**
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* Swagger文档，只有在测试环境才会使用
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*
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* @author FrozenWatermelon
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*/
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@Configuration
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@EnableSwagger2
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@EnableKnife4j
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public class SwaggerConfiguration {
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@Bean
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public Docket baseRestApi() {
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return new Docket(DocumentationType.SWAGGER_2).apiInfo(apiInfo()).select()
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.apis(RequestHandlerSelectors.basePackage("com.mall4j.cloud.distribution.controller")).paths(PathSelectors.any())
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.build();
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}
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@Bean
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public ApiInfo apiInfo() {
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return new ApiInfoBuilder().title("mall4cloud商城接口文档").description("mall4cloud商城接口文档Swagger版").termsOfServiceUrl("")
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.contact(new Contact("广州蓝海创新科技有限公司", "", "")).version("1.0").build();
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}
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}
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```
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到这里微服务就创建完成了，相关基本配置也搭建好了。
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