Mina 是 Apache 开源的一个 NIO 框架。还有一个 NIO 框架是 Netty。 像 Dubbo,RocketMQ,Nacos 都是基于Netty开发的,因此用 Mina 其实也能够开发。java
由于以前想看 RocketMQ,Nacos 的源码,看了一下Netty,结果Netty看了一点,RocketMQ,Nacos 的源码也看了一点...尴尬啊。mysql
好了,如今开始,开发一个基于 Mina 的配置中心。git
感受一篇写不完,因此就搞了一个系列,我也不知道最后会有多少。github
先说一下技术架构。web
虽然主要是Mina,当中也包含了不少SpringBoot相关的知识。redis
整个配置中心包括三个部分:spring
先编写Server端,建立一个Maven项目。sql
把红色的全删掉,这是一个多模块项目,最外面的只是一个空的父项目。apache
添加两个模块,一个Server,一个Basejson
这时选择 Maven ,GroupId就会默认填好,不须要再输入了。
最后结构是这样的(不过选择Maven不会自动建立包和启动类...)
接下来就是编辑 pom.xml 添加依赖了。
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <packaging>pom</packaging> <modules> <module>mina-server</module> <module>mina-base</module> </modules> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.2.6.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.lww</groupId> <artifactId>mina-config</artifactId> <version>1.0.0</version> <name>mina-config</name> <description>Demo project for Spring Boot</description> <properties> <java.version>1.8</java.version> <!--升级版本号只用修改这里--> <config.version>1.0.0</config.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</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> <exclusions> <exclusion> <groupId>org.junit.vintage</groupId> <artifactId>junit-vintage-engine</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus-boot-starter</artifactId> <version>3.0.4</version> </dependency> <!-- mina核心依赖 https://mvnrepository.com/artifact/org.apache.mina/mina-core --> <dependency> <groupId>org.apache.mina</groupId> <artifactId>mina-core</artifactId> <version>2.1.3</version> </dependency> <!-- 为了进行socket通讯,还须要加入另外一个依赖: https://mvnrepository.com/artifact/org.apache.mina/mina-integration-beans --> <dependency> <groupId>org.apache.mina</groupId> <artifactId>mina-integration-beans</artifactId> <version>2.1.3</version> <exclusions> <exclusion> <groupId>org.apache.mina</groupId> <artifactId>mina-core</artifactId> </exclusion> <exclusion> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.apache.mina</groupId> <artifactId>mina-integration-spring</artifactId> <version>1.1.7</version> <exclusions> <exclusion> <artifactId>mina-core</artifactId> <groupId>org.apache.mina</groupId> </exclusion> </exclusions> </dependency> <dependency> <groupId>io.springfox</groupId> <artifactId>springfox-swagger2</artifactId> <version>2.9.2</version> <exclusions> <exclusion> <groupId>io.swagger</groupId> <artifactId>swagger-models</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>io.swagger</groupId> <artifactId>swagger-models</artifactId> <version>1.5.21</version> <exclusions> <exclusion> <artifactId>swagger-annotations</artifactId> <groupId>io.swagger</groupId> </exclusion> </exclusions> </dependency> <dependency> <groupId>io.springfox</groupId> <artifactId>springfox-swagger-ui</artifactId> <version>2.9.2</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.62</version> </dependency> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-lang3</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-configuration-processor</artifactId> <optional>true</optional> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>3.2</version> <configuration> <source>1.8</source> <target>1.8</target> <encoding>UTF-8</encoding> </configuration> </plugin> <!--此时pom文件会报错Missing artifact org.apache.mina:mina-core:bundle:2.1.3 须要添加以下插件:--> <plugin> <groupId>org.apache.felix</groupId> <artifactId>maven-bundle-plugin</artifactId> <extensions>true</extensions> </plugin> </plugins> </build> </project> 复制代码
放在父项目的pom.xml中,全局均可以用,Mybatis-Plus和Swagger放在这里,是由于,消息体(Domain)要放在Base模块里,不放又不行,由于Client也要用这个类。
<?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>mina-config</artifactId> <groupId>com.lww</groupId> <version>1.0.0</version> </parent> <modelVersion>4.0.0</modelVersion> <artifactId>mina-server</artifactId> <dependencies> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>8.0.18</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid-spring-boot-starter</artifactId> <version>1.1.13</version> </dependency> <dependency> <groupId>com.lww</groupId> <artifactId>mina-base</artifactId> <version>${config.version}</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-redis</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-aop</artifactId> </dependency> </dependencies> </project> 复制代码
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <parent> <artifactId>mina-config</artifactId> <groupId>com.lww</groupId> <version>1.0.0</version> </parent> <modelVersion>4.0.0</modelVersion> <artifactId>mina-base</artifactId> <version>${config.version}</version> </project> 复制代码
一些基本的配置类
SpringBeanFactoryUtils
这个类主要从ApplicationContext
容器中获取对象,按理说,Client也会用到, 可是没有放到Base里,由于若是放到Base里,须要配置扫描路径,还要建立一个/META-INF/spring.factories来配置,不然是没法获取到容器的。 只为了一个工具类,有点太不划算了。
不过在Client中,会配置这些东西,并且把SpringBeanFactoryUtils
配置了一下,由于Client是做为第三方包被引入的,若是不配置,是没法生效的。
第一章先到这里。 准备工做已经完成了。第二章会建立消息表,而后总体设计配置中心,继续撸代码。敬请期待!
项目源码
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