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=mysql quarkus.datasource.jdbc.driver=com.mysql.cj.jdbc.Driver quarkus.datasource.username=root quarkus.datasource.password=root quarkus.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。 @QuarkusMain public class SimpleApplication implements QuarkusApplication { public static void main(String[] args) { Quarkus.run(SimpleApplication.class,args); } @Override public 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#userDao 2021-01-12 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:8080 2021-01-12 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 <<<
