Spring 6.x 的 AoT 相关支持的注解

RegisterReflectionForBinding

RegisterReflectionForBinding在构建期间.使用RegisterReflectionForBindingProcessor 来注册相关类的元数据. 详情看org.springframework.aot.hint.BindingReflectionHintsRegistrar 类的处理.
不仅会处理当前类. 还会处理其方法和方法参数和返回值的相关类. 仅仅处理与反射相关的操作. 一些动态代理. 序列化. 资源文件.等处理不了.

ImportRuntimeHints

ImportRuntimeHints 可控.更加灵活的处理相关类的元数据. 不仅可以处理反射. 资源. 序列化也可以处理. 指定相关RuntimeHintsRegistrar的子类. for-example:

@SpringBootApplication
@ImportRuntimeHints(AccountService.AccountRuntimeHints.class)
public class AccountService {

    public static void main(String[] args) {

        SpringApplication.run(AccountService.class, args);
    }
   static class AccountRuntimeHints implements RuntimeHintsRegistrar {

        @Override
        public void registerHints(RuntimeHints hints, ClassLoader classLoader) {
            ReflectionHints ref = hints.reflection();
            try {
                for (Class<?> c : getK8sClasses()) {
                    ref.registerType(c, MemberCategory.values());
                }
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }

        private Collection<? extends Class<?>> getK8sClasses() {
            Set<Class<?>> classes = new HashSet<>();
            return classes;
        }
    }
}
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Reflective

标注哪些类是需要被反射的. 会自动处理

使用BeanFactoryInitializationAotProcessor

• 可以在build阶段动态注册某些bean, 例如对Feign的支持. 就是使用这种方式在构建阶段生成Feign的实现类动态注册到spring context中. 参考 注册Feign 实例相关源码:org.springframework.cloud.openfeign.aot.FeignClientBeanFactoryInitializationAotProcessor

使用aot.factories 注册BeanFactoryInitializationAotProcessor

org.springframework.beans.factory.aot.BeanFactoryInitializationAotProcessor=

如何debug Spring的AoT的编译阶段.

   public static void main(String[] args) throws Exception {
        args = new String[]{"spring.cloud.kubernetes.example.account.AccountService",
                "/Users/apple/opensource/spring-cloud-kubernetes-microservices-toolkit/example-service-account/build/generated/aotSources",
                "/Users/apple/opensource/spring-cloud-kubernetes-microservices-toolkit/example-service-account/build/generated/aotResources",
                "/Users/apple/opensource/spring-cloud-kubernetes-microservices-toolkit/example-service-account/build/generated/aotClasses",
                "spring.cloud.kubernetes.example.account",
                "example-service-account"};
        SpringApplicationAotProcessor.main(args);
    }
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• spring.cloud.kubernetes.example.account.AccountService 主类
• spring.cloud.kubernetes.example.account 主包
• example-service-account 模块名
• 其他的三个为代码生成的路径

一个spring-cloud-kubernetes的本地debug的开发工具包.并支持native

• github