Spring Boot 快速迁移至 Quarkus

Quarkus 是一个目前非常火的 Java 应用开发框架，定位是轻量级的微服务框架。，Quarkus 提供了优秀的容器化整合能力，相较于传统开发框架（Spring Boot）有着更快的启动速度、更小的内存消耗、更短的服务响应。

本文将演示将 SpringBoot 迁移至 Quarkus

Spring Boot 示例程序

使用 JPA 完成 数据库的增删改查操作，基础代码如下

  • maven 依赖
<dependency>  <groupId>org.springframework.boot</groupId>  <artifactId>spring-boot-starter-data-jpa</artifactId></dependency><dependency>  <groupId>org.springframework.boot</groupId>  <artifactId>spring-boot-starter-web</artifactId></dependency>
  • jpa crud
public interface DemoUserDao extends CrudRepository<DemoUser, Long> {}

迁移至 Quarkus

  • quarkus-bom 管理了全部 quarkus 插件 maven 依赖的版本信息，引入后所有依赖不需要再定义版本。
<dependencyManagement><dependencies><dependency><groupId>io.quarkus</groupId><artifactId>quarkus-bom</artifactId><version>1.10.5.Final</version><type>pom</type><scope>import</scope></dependency></dependencies></dependencyManagement>
  • 迁移 spring-web 、spring-jpa 至 quarkus 技术栈。
<dependency>  <groupId>io.quarkus</groupId>  <artifactId>quarkus-spring-data-jpa</artifactId></dependency><dependency>  <groupId>io.quarkus</groupId>  <artifactId>quarkus-spring-web</artifactId></dependency>
  • 配置文件调整 (还是在 application.yml)
quarkus.datasource.db-kind=mysqlquarkus.datasource.jdbc.driver=com.mysql.cj.jdbc.Driverquarkus.datasource.username=rootquarkus.datasource.password=rootquarkus.datasource.jdbc.url=jdbc:mysql://localhost:3306/pig_demo?useUnicode=true&characterEncoding=utf8&autoReconnect=true&rewriteBatchedStatements=TRUE
  • Main 方法调整为 实现 QuarkusApplication ，且需要通过 Quarkus.waitForExit() 保持服务运行。
@QuarkusMainpublic class SimpleApplication implements QuarkusApplication {public static void main(String[] args) {Quarkus.run(SimpleApplication.class,args);}@Overridepublic int run(String... args) {Quarkus.waitForExit();return 0;}}

启动运行

main 方法启动, 输出 Quarkus banner

__  ____  __  _____   ___  __ ____  ______ --/ __ \/ / / / _ | / _ \/ //_/ / / / __/ -/ /_/ / /_/ / __ |/ , _/ ,< / /_/ /\ --\___\_\____/_/ |_/_/|_/_/|_|\____/___/2021-01-12 22:31:46,341 INFO  [io.qua.arc.pro.BeanProcessor] (build-21) Found unrecommended usage of private members (use package-private instead) in application beans:- @Inject field com.example.simple.controller.DemoController#userDao2021-01-12 22:31:48,702 INFO  [io.quarkus] (Quarkus Main Thread) Quarkus 1.10.5.Final on JVM started in 4.613s. Listening on: http://localhost:80802021-01-12 22:31:48,703 INFO  [io.quarkus] (Quarkus Main Thread) Profile dev activated. Live Coding activated.2021-01-12 22:31:48,703 INFO  [io.quarkus] (Quarkus Main Thread) Installed features: [agroal, cdi, hibernate-orm, hibernate-orm-panache, mutiny, narayana-jta, resteasy, resteasy-jackson, smallrye-context-propagation, spring-data-jpa, spring-di, spring-web]

非常重要的是输出了当前已经安装的功能

Installed features: [agroal, cdi, hibernate-orm, hibernate-orm-panache, mutiny, narayana-jta, resteasy, resteasy-jackson, smallrye-context-propagation, spring-data-jpa, spring-di, spring-web]

【扩展】 actuator 监控迁移

  • 添加以下依赖
<dependency>  <groupId>io.quarkus</groupId>  <artifactId>quarkus-smallrye-health</artifactId></dependency>
  • 指定访问监控断点路径
quarkus.smallrye-health.root-path=/actuator/health
  • 访问监控检查断点测试
 curl http://localhost:8080/actuator/health{    "status": "UP",    "checks": [        {            "name": "Database connections health check",            "status": "UP"        }    ]}⏎

【扩展】Flyway 迁移

  • 添加 quarkus flyway 插件
<dependency>  <groupId>io.quarkus</groupId>  <artifactId>quarkus-flyway</artifactId></dependency>
  • 指定插件启动策略即可
quarkus.flyway.migrate-at-start=true

>>> 源码 https://gitee.com/log4j/pig，欢迎署名转载 <<<

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