GraalVM实践javaweb项目改造成SpringNative

　　Spring Native使用
　　代码已贡献在github，iMinusMinus/jaot的子模块javaweb，master分支为传统的ssm框架，切换到spring-native分支即可。
　　spring-native项目提供了spring-native和spring-aot两个jar包，由于这些jar可能并未发布到中央仓库，需要加入spring仓库，内容如下：                           org.springframework.experimental             spring-native             ${spring-native.version}                               org.springframework.experimental             spring-aot             ${spring-native.version}             provided                                                  org.springframework.boot                 spring-boot-maven-plugin                 ${spring-boot.version}                                      ${repackage.classifier}                                                                                                             repackage                                                                                                                  org.springframework.experimental                 spring-aot-maven-plugin                 ${spring-native.version}                                      false                     true                     true                                                                                generate                                                      generate                                                                                            test-generate                                                      test-generate                                                                                                                     spring-release             Spring release             https://repo.spring.io/release                              false                                            spring-snapshots             Spring Snapshots             https://repo.spring.io/snapshot                                         spring-release             Spring release             https://repo.spring.io/release                              false                                                      native                              exec                 0.9.10                                                                                 org.junit.platform                     junit-platform-launcher                     test                                                                                                          org.graalvm.buildtools                         native-maven-plugin                         ${native-buildtools.version}                         true                                                                                       test-native                                 test                                                                      test                                                                                                                            build-native                                 package                                                                      build                                                                                                                                                        
　　执行编译：mvn -Pnative -DskipTests clean package
　　如果使用了logback自身的＂%gray＂、＂%highlight＂以及安装DelayingShutdownHook时，都会编译后启动报错。这是因为spring-native默认的LogbackHints只添加了部分logback的类型信息，可以使用spring-boot提供的默认配置，或者自己添加NativeHint。
　　报错信息如下：%PARSER_ERROR[gray] %PARSER_ERROR[highlight] %PARSER_ERROR[magenta] %PARSER_ERROR[gray] %PARSER_ERROR[gray] %PARSER_ERROR[cyan] %PARSER_ERROR[gray] Application run failed %PARSER_ERROR[ex]java.lang.IllegalStateException: java.lang.IllegalStateException: Logback configuration error detected: ERROR in ch.qos.logback.core.pattern.parser.Compiler@61b960ac - Failed to instantiate converter class [ch.qos.logback.core.pattern.color.GrayCompositeConverter] as a composite converter for keyword [gray] ch.qos.logback.core.util.DynamicClassLoadingException: Failed to instantiate type ch.qos.logback.core.pattern.color.GrayCompositeConverter ERROR in ch.qos.logback.core.pattern.parser.Compiler@61b960ac - Failed to create converter for [%gray] keyword ERROR in ch.qos.logback.core.pattern.parser.Compiler@61b960ac - Failed to instantiate converter class [ch.qos.logback.classic.pattern.color.HighlightingCompositeConverter] as a composite converter for keyword [highlight] ch.qos.logback.core.util.DynamicClassLoadingException: Failed to instantiate type ch.qos.logback.classic.pattern.color.HighlightingCompositeConverter ERROR in ch.qos.logback.core.pattern.parser.Compiler@61b960ac - Failed to create converter for [%highlight] keyword ERROR in ch.qos.logback.core.pattern.parser.Compiler@61b960ac - Failed to instantiate converter class [ch.qos.logback.core.pattern.color.MagentaCompositeConverter] as a composite converter for keyword [magenta] ch.qos.logback.core.util.DynamicClassLoadingException: Failed to instantiate type ch.qos.logback.core.pattern.color.MagentaCompositeConverter ERROR in ch.qos.logback.core.pattern.parser.Compiler@61b960ac - Failed to create converter for [%magenta] keyword ERROR in ch.qos.logback.core.pattern.parser.Compiler@61b960ac - Failed to instantiate converter class [ch.qos.logback.core.pattern.color.GrayCompositeConverter] as a composite converter for keyword [gray] ch.qos.logback.core.util.DynamicClassLoadingException: Failed to instantiate type ch.qos.logback.core.pattern.color.GrayCompositeConverter ERROR in ch.qos.logback.core.pattern.parser.Compiler@61b960ac - Failed to create converter for [%gray] keyword ERROR in ch.qos.logback.core.pattern.parser.Compiler@61b960ac - Failed to instantiate converter class [ch.qos.logback.core.pattern.color.GrayCompositeConverter] as a composite converter for keyword [gray] ch.qos.logback.core.util.DynamicClassLoadingException: Failed to instantiate type ch.qos.logback.core.pattern.color.GrayCompositeConverter ERROR in ch.qos.logback.core.pattern.parser.Compiler@61b960ac - Failed to create converter for [%gray] keyword ERROR in ch.qos.logback.core.pattern.parser.Compiler@61b960ac - Failed to instantiate converter class [ch.qos.logback.core.pattern.color.CyanCompositeConverter] as a composite converter for keyword [cyan] ch.qos.logback.core.util.DynamicClassLoadingException: Failed to instantiate type ch.qos.logback.core.pattern.color.CyanCompositeConverter ERROR in ch.qos.logback.core.pattern.parser.Compiler@61b960ac - Failed to create converter for [%cyan] keyword ERROR in ch.qos.logback.core.pattern.parser.Compiler@61b960ac - Failed to instantiate converter class [ch.qos.logback.core.pattern.color.GrayCompositeConverter] as a composite converter for keyword [gray] ch.qos.logback.core.util.DynamicClassLoadingException: Failed to instantiate type ch.qos.logback.core.pattern.color.GrayCompositeConverter ERROR in ch.qos.logback.core.pattern.parser.Compiler@61b960ac - Failed to create converter for [%gray] keyword ERROR in ch.qos.logback.core.pattern.parser.Compiler@61b960ac - Failed to instantiate converter class [ch.qos.logback.classic.pattern.ThrowableProxyConverter] for keyword [ex] ch.qos.logback.core.util.DynamicClassLoadingException: Failed to instantiate type ch.qos.logback.classic.pattern.ThrowableProxyConverter ERROR in ch.qos.logback.core.pattern.parser.Compiler@61b960ac - [ex] is not a valid conversion word ERROR in ch.qos.logback.core.pattern.parser.Compiler@7ad7aa6c - Failed to instantiate converter class [ch.qos.logback.classic.pattern.ThrowableProxyConverter] for keyword [ex] ch.qos.logback.core.util.DynamicClassLoadingException: Failed to instantiate type ch.qos.logback.classic.pattern.ThrowableProxyConverter ERROR in ch.qos.logback.core.pattern.parser.Compiler@7ad7aa6c - [ex] is not a valid conversion word ERROR in ch.qos.logback.core.joran.action.AppenderAction - Could not create an Appender of type [ch.qos.logback.classic.AsyncAppender]. ch.qos.logback.core.util.DynamicClassLoadingException: Failed to instantiate type ch.qos.logback.classic.AsyncAppender ERROR in ch.qos.logback.core.joran.spi.Interpreter@24:73 - ActionException in Action for tag [appender] ch.qos.logback.core.joran.spi.ActionException: ch.qos.logback.core.util.DynamicClassLoadingException: Failed to instantiate type ch.qos.logback.classic.AsyncAppender ERROR in ch.qos.logback.core.joran.action.ShutdownHookAction - Could not create a shutdown hook of type [ch.qos.logback.core.hook.DelayingShutdownHook]. ch.qos.logback.core.util.DynamicClassLoadingException: Failed to instantiate type ch.qos.logback.core.hook.DelayingShutdownHook ERROR in ch.qos.logback.core.joran.spi.Interpreter@49:75 - ActionException in Action for tag [shutdownHook] ch.qos.logback.core.joran.spi.ActionException: ch.qos.logback.core.util.DynamicClassLoadingException: Failed to instantiate type ch.qos.logback.core.hook.DelayingShutdownHook at org.springframework.boot.context.logging.LoggingApplicationListener.initializeSystem(LoggingApplicationListener.java:328) at org.springframework.boot.context.logging.LoggingApplicationListener.initialize(LoggingApplicationListener.java:282) at org.springframework.boot.context.logging.LoggingApplicationListener.onApplicationEnvironmentPreparedEvent(LoggingApplicationListener.java:240) at org.springframework.boot.context.logging.LoggingApplicationListener.onApplicationEvent(LoggingApplicationListener.java:216) at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:176) at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:169) at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:143) at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:131) at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:85) at org.springframework.boot.SpringApplicationRunListeners.lambda$environmentPrepared$2(SpringApplicationRunListeners.java:66) at java.util.ArrayList.forEach(ArrayList.java:1511) at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:120) at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:114) at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:65) at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:339) at org.springframework.boot.SpringApplication.run(SpringApplication.java:297) at org.springframework.boot.SpringApplication.run(SpringApplication.java:1312) at org.springframework.boot.SpringApplication.run(SpringApplication.java:1301) at ml.iamwhatiam.baostock.Application.main(Application.java:12)
　　可以通过在main类或配置类上添加注解解决，代码如下：@NativeHint(trigger = Level.class, types = {         @TypeHint(types = {                 GrayCompositeConverter.class,                 CyanCompositeConverter.class,                 HighlightingCompositeConverter.class,                 MagentaCompositeConverter.class,                 ThrowableProxyConverter.class         }, access = {}, methods = @MethodHint(name = ＂＂)),         @TypeHint(types = {                 AsyncAppender.class,                 DelayingShutdownHook.class         }, access = {TypeAccess.PUBLIC_CONSTRUCTORS, TypeAccess.PUBLIC_METHODS}), }) @SpringBoootApplication public class Application {      public static void main(String[] args) {           SpringApplication.run(Application.class, args);       } }
　　再次编译启动后，仍有报错： [36mo.s.boot.SpringApplication  [0;39m  [1;30m: [0;39m Application run failed org.springframework.beans.factory.BeanCreationException: Error creating bean with name ＂stockRepositoryImpl＂: Initialization of bean failed; nested exception is com.oracle.svm.core.jdk.UnsupportedFeatureError: Unsupported method java.lang.Class.isSealed() is reachable: The declaring class of this element has been substituted, but this element is not present in the substitution class at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:628) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:953) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:918) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583) at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145) at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:740) at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:415) at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) at org.springframework.boot.SpringApplication.run(SpringApplication.java:1312) at org.springframework.boot.SpringApplication.run(SpringApplication.java:1301) at ml.iamwhatiam.baostock.Application.main(Application.java:38) Caused by: com.oracle.svm.core.jdk.UnsupportedFeatureError: Unsupported method java.lang.Class.isSealed() is reachable: The declaring class of this element has been substituted, but this element is not present in the substitution class at com.oracle.svm.core.util.VMError.unsupportedFeature(VMError.java:87) at java.lang.Class.isSealed(DynamicHub.java:4563) at java.lang.reflect.Method.invoke(Method.java:568) at org.springframework.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:282) at org.springframework.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:266) at org.springframework.aop.framework.AopProxyUtils.completeProxiedInterfaces(AopProxyUtils.java:146) at org.springframework.aop.framework.JdkDynamicAopProxy.(JdkDynamicAopProxy.java:111) at org.springframework.aop.framework.DefaultAopProxyFactory.createAopProxy(DefaultAopProxyFactory.java:55) at org.springframework.aop.framework.ProxyCreatorSupport.createAopProxy(ProxyCreatorSupport.java:105) at org.springframework.aop.framework.ProxyFactory.getProxy(ProxyFactory.java:110) at org.springframework.aop.framework.AbstractAdvisingBeanPostProcessor.postProcessAfterInitialization(AbstractAdvisingBeanPostProcessor.java:99) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsAfterInitialization(AbstractAutowireCapableBeanFactory.java:455) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1808) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:620) ... 15 common frames omitted
　　可以看到是因为触发了动态代理，由于使用的是基于JDK17的GraalVM，触发了bug。
　　一般来说JDK动态代理是不存在问题的，CGLIB不被GraalVM原生支持。而熟悉spring框架的朋友都知道，接口才能使用JDK动态代理。根据bean名称我们能找到对应的类，而根据类上的Repository注解，非常熟悉spring-boot的朋友会想起有个PersistenceExceptionTranslationAutoConfiguration，它会自动给有Repository注解的bean生成代理类。
　　既然罪魁祸首找到了，那么将Repository注解改成Component注解就好。但是需要注意，改了后，自然也没有SQL发生异常后的自动转换了。
　　改好了再编译看下呗：org.springframework.beans.factory.BeanCreationException: Error creating bean with name ＂baoStockApi＂: Unexpected exception during bean creation; nested exception is java.lang.ExceptionInInitializerError at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:555) at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:953) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:918) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583) at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145) at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:740) at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:415) at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) at org.springframework.boot.SpringApplication.run(SpringApplication.java:1312) at org.springframework.boot.SpringApplication.run(SpringApplication.java:1301) at ml.iamwhatiam.baostock.Application.main(Application.java:45) Caused by: java.lang.ExceptionInInitializerError: null at java.lang.Class.ensureInitialized(DynamicHub.java:546) at java.lang.Class.ensureInitialized(DynamicHub.java:546) at java.lang.Class.ensureInitialized(DynamicHub.java:546) at java.lang.Class.ensureInitialized(DynamicHub.java:546) at java.lang.Class.ensureInitialized(DynamicHub.java:546) at java.lang.Class.ensureInitialized(DynamicHub.java:546) at io.netty.util.internal.PlatformDependent$Mpsc.newMpscQueue(PlatformDependent.java:986) at io.netty.util.internal.PlatformDependent.newMpscQueue(PlatformDependent.java:997) at io.netty.channel.nio.NioEventLoop.newTaskQueue0(NioEventLoop.java:282) at io.netty.channel.nio.NioEventLoop.newTaskQueue(NioEventLoop.java:153) at io.netty.channel.nio.NioEventLoop.(NioEventLoop.java:141) at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:183) at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:38) at io.netty.util.concurrent.MultithreadEventExecutorGroup.(MultithreadEventExecutorGroup.java:84) at io.netty.util.concurrent.MultithreadEventExecutorGroup.(MultithreadEventExecutorGroup.java:60) at io.netty.channel.MultithreadEventLoopGroup.(MultithreadEventLoopGroup.java:52) at io.netty.channel.nio.NioEventLoopGroup.(NioEventLoopGroup.java:97) at io.netty.channel.nio.NioEventLoopGroup.(NioEventLoopGroup.java:92) at io.netty.channel.nio.NioEventLoopGroup.(NioEventLoopGroup.java:73) at io.netty.channel.nio.NioEventLoopGroup.(NioEventLoopGroup.java:53) at io.netty.channel.nio.NioEventLoopGroup.(NioEventLoopGroup.java:45) at ml.iamwhatiam.baostock.infrastructure.rpc.NettyClient.init(NettyClient.java:86) at ml.iamwhatiam.baostock.infrastructure.rpc.NettyClient.(NettyClient.java:73) at ml.iamwhatiam.baostock.infrastructure.AppConfig.baoStockApi(AppConfig.java:19) at org.springframework.aot.ContextBootstrapInitializer.lambda$initialize$0(ContextBootstrapInitializer.java:219) at org.springframework.aot.beans.factory.BeanDefinitionRegistrar$ThrowableSupplier.get(BeanDefinitionRegistrar.java:317) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.obtainFromSupplier(AbstractAutowireCapableBeanFactory.java:1249) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1191) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ... 14 common frames omitted Caused by: java.lang.RuntimeException: java.lang.NoSuchFieldException: producerIndex at io.netty.util.internal.shaded.org.jctools.util.UnsafeAccess.fieldOffset(UnsafeAccess.java:111) at io.netty.util.internal.shaded.org.jctools.queues.BaseMpscLinkedArrayQueueProducerFields.(BaseMpscLinkedArrayQueue.java:55) ... 44 common frames omitted Caused by: java.lang.NoSuchFieldException: producerIndex at java.lang.Class.getDeclaredField(DynamicHub.java:2610) at io.netty.util.internal.shaded.org.jctools.util.UnsafeAccess.fieldOffset(UnsafeAccess.java:107)
　　这个看起来也简单，不就是有些使用Unsafe么，反射信息加上：@NativeHint(trigger = NettyClient.class, types = {         @TypeHint(typeNames = ＂io.netty.util.internal.shaded.org.jctools.queues.BaseMpscLinkedArrayQueueColdProducerFields＂,                 fields = @FieldHint(name = ＂producerLimit＂, allowUnsafeAccess = true)),         @TypeHint(typeNames = ＂io.netty.util.internal.shaded.org.jctools.queues.BaseMpscLinkedArrayQueueProducerFields＂,                 fields = @FieldHint(name = ＂producerIndex＂, allowUnsafeAccess = true)),         @TypeHint(typeNames = ＂io.netty.util.internal.shaded.org.jctools.queues.BaseMpscLinkedArrayQueueConsumerFields＂,                 fields = @FieldHint(name = ＂consumerIndex＂, allowUnsafeAccess = true)),         @TypeHint(typeNames = ＂io.netty.util.internal.shaded.org.jctools.queues.MpscArrayQueueConsumerIndexField＂,                 fields = @FieldHint(name = ＂consumerIndex＂, allowUnsafeAccess = true)),         @TypeHint(typeNames = ＂io.netty.util.internal.shaded.org.jctools.queues.MpscArrayQueueProducerIndexField＂,                 fields = @FieldHint(name = ＂producerIndex＂, allowUnsafeAccess = true)),         @TypeHint(typeNames = ＂io.netty.util.internal.shaded.org.jctools.queues.MpscArrayQueueProducerLimitField＂,                 fields = @FieldHint(name = ＂producerLimit＂, allowUnsafeAccess = true)),         @TypeHint(typeNames = {                 ＂io.netty.channel.DefaultChannelPipeline$HeadContext＂,                 ＂io.netty.channel.DefaultChannelPipeline$TailContext＂,         }, access = {TypeAccess.QUERY_DECLARED_METHODS}),         @TypeHint(types = ChannelHandlerAdapter.class,                 queriedMethods = @MethodHint(name = ＂exceptionCaught＂, parameterTypes = {ChannelHandlerContext.class, Throwable.class})),         @TypeHint(types = {                 AbstractByteBufAllocator.class,                 ChannelInboundHandlerAdapter.class,                 ChannelInitializer.class,                 ChannelOutboundHandlerAdapter.class,                 ByteToMessageDecoder.class,                 MessageToByteEncoder.class,                 ReferenceCountUtil.class         }, access = TypeAccess.QUERY_DECLARED_METHODS),         @TypeHint(types = {                 PooledByteBufAllocator.class,         })}, options = {＂-Dbaostock.socket.readTimeout＂})
　　于是接着编译，再启动。可不同的错误再一次袭来：org.springframework.beans.factory.BeanCreationException: Error creating bean with name ＂sqlSessionFactory＂: Unexpected exception during bean creation; nested exception is java.lang.NoClassDefFoundError: Could not initialize class org.mybatis.spring.SqlSessionFactoryBean at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:555) at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:953) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:918) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583) at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145) at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:740) at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:415) at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) at org.springframework.boot.SpringApplication.run(SpringApplication.java:1312) at org.springframework.boot.SpringApplication.run(SpringApplication.java:1301) at ml.iamwhatiam.baostock.Application.main(Application.java:77) Caused by: java.lang.NoClassDefFoundError: Could not initialize class org.mybatis.spring.SqlSessionFactoryBean at org.mybatis.spring.boot.autoconfigure.MybatisAutoConfiguration.sqlSessionFactory(MybatisAutoConfiguration.java:141) at org.springframework.aot.ContextBootstrapInitializer.lambda$initialize$70(ContextBootstrapInitializer.java:367) at org.springframework.aot.beans.factory.BeanDefinitionRegistrar$ThrowableFunction.apply(BeanDefinitionRegistrar.java:294) at org.springframework.aot.beans.factory.InjectedElementResolver.create(InjectedElementResolver.java:67) at org.springframework.aot.beans.factory.BeanDefinitionRegistrar$BeanInstanceContext.create(BeanDefinitionRegistrar.java:211) at org.springframework.aot.ContextBootstrapInitializer.lambda$initialize$71(ContextBootstrapInitializer.java:367) at org.springframework.aot.beans.factory.BeanDefinitionRegistrar$ThrowableFunction.apply(BeanDefinitionRegistrar.java:294) at org.springframework.aot.beans.factory.BeanDefinitionRegistrar.lambda$instanceSupplier$0(BeanDefinitionRegistrar.java:115) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.obtainFromSupplier(AbstractAutowireCapableBeanFactory.java:1249) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1191) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ... 14 common frames omitted
　　由于不关注mybatis团队的动态，我先是认为MyBatisAutoConfiguration存在问题，将@Configuration改成spring建议的@Configuration(proxyBeanMethods=false)形式。结果仍是问题频出，只得了解下spring-native的机制，想看下spring-data-jpa是如何处理。Mapper接口加入动态代理信息，Mapper方法的入参和出参加入反射信息，Mapper需要的xml作为资源信息，但还是存在诸多问题。于是到mybatis-spring上看看，发现官方团队已经在支持且有示例，于是添加依赖和仓库（由于还是snapshot版本）：                               org.mybatis.spring.native             mybatis-spring-native-extensions             ${mybatis-spring-native.version}                                         sonatype-oss-snapshots             Sonatype OSS Snapshots Repository             https://oss.sonatype.org/content/repositories/snapshots          
　　然后添加注解（由于xml不是mybatis-spring-native的默认文件名）@MyBatisResourcesScan(mapperLocationPatterns = ＂mapper/**/*Mapper.xml＂)
　　但是，编译后错误再度出现：2022-04-04 18:02:27.159 INFO [stock,,] 15128 --- [main] ml.iamwhatiam.baostock.Application : No active profile set, falling back to 1 default profile: ＂default＂ 2022-04-04 18:02:33.010 INFO [stock,,] 15128 --- [main] ml.iamwhatiam.baostock.Application : Started Application in 5.885 seconds (JVM running for 5.887) 2022-04-04 18:02:36.307 ERROR [stock,,] 15128 --- [http-nio-8080-exec-1] m.i.b.i.web.WrapResponseBodyAdvice : uncaught exception: Invalid bound statement (not found): ml.iamwhatiam.baostock.infrastructure.dao.IndustryMapper.findAll org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): ml.iamwhatiam.baostock.infrastructure.dao.IndustryMapper.findAll at org.apache.ibatis.binding.MapperMethod$SqlCommand.(MapperMethod.java:235) at org.apache.ibatis.binding.MapperMethod.(MapperMethod.java:53) at org.apache.ibatis.binding.MapperProxy.lambda$cachedInvoker$0(MapperProxy.java:108) at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1708) at org.apache.ibatis.util.MapUtil.computeIfAbsent(MapUtil.java:35) at org.apache.ibatis.binding.MapperProxy.cachedInvoker(MapperProxy.java:95) at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:86) at jdk.proxy4.$Proxy257.findAll(Unknown Source) at ml.iamwhatiam.baostock.infrastructure.dao.StockRepositoryImpl.load(StockRepositoryImpl.java:30) at ml.iamwhatiam.baostock.domain.PotentialStockServiceImpl.top(PotentialStockServiceImpl.java:16) at ml.iamwhatiam.baostock.infrastructure.web.StockController.topN(StockController.java:53) at java.lang.reflect.Method.invoke(Method.java:568) at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205) at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:150) at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:117) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808) at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1067) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) at javax.servlet.http.HttpServlet.service(HttpServlet.java:655) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) at javax.servlet.http.HttpServlet.service(HttpServlet.java:764) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:540) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:359) at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:399) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:889) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1735) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191) at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:833) at com.oracle.svm.core.thread.JavaThreads.threadStartRoutine(JavaThreads.java:600) at com.oracle.svm.core.windows.WindowsJavaThreads.osThreadStartRoutine(WindowsJavaThreads.java:138)
　　看mapper的xml文件已经在jar包中存在，resourc-config.json也包含了文件。死马当活马医，把xml文件放到mapper接口包下，把MyBatisResourcesScan删除，再度编译。新的问题出现了，崩溃！org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name ＂stockRepositoryImpl＂: Unsatisfied dependency expressed through field ＂stockMapper＂; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type ＂ml.iamwhatiam.baostock.infrastructure.dao.StockMapper＂ available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired} at org.springframework.aot.beans.factory.InjectedFieldResolver.resolve(InjectedFieldResolver.java:50) at org.springframework.aot.beans.factory.InjectedElementResolver.resolve(InjectedElementResolver.java:35) at org.springframework.aot.beans.factory.InjectedElementResolver.invoke(InjectedElementResolver.java:53) at ml.iamwhatiam.baostock.infrastructure.dao.ContextBootstrapInitializer.lambda$registerStockRepositoryImpl$2(ContextBootstrapInitializer.java:14) at org.springframework.aot.beans.factory.BeanDefinitionRegistrar$ThrowableFunction.apply(BeanDefinitionRegistrar.java:294) at org.springframework.aot.beans.factory.BeanDefinitionRegistrar.lambda$instanceSupplier$0(BeanDefinitionRegistrar.java:115) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.obtainFromSupplier(AbstractAutowireCapableBeanFactory.java:1249) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1191) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:953) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:918) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583) at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145) at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:740) at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:415) at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) at org.springframework.boot.SpringApplication.run(SpringApplication.java:1312) at org.springframework.boot.SpringApplication.run(SpringApplication.java:1301) at ml.iamwhatiam.baostock.Application.main(Application.java:12)
　　查看生成的ContextBootstrapInitializer类，可以发现差异，被@Autowired或@Value注解的字段可以正常被注入，使用@Resource注解的字段，被忽略掉了。
　　查看spring-native源代码的InjectionPointsSupplier，可以看到该类只处理了Autowired/Value/Inject注解。找到原因就好办了，把Resource注解改成Autowired就行，或者自己定义BeanRegistrationWriterSupplier，提供自己的InjectionPointsSupplier，同时处理Resource/Autowired/Value/Inject注解。
　　曙光已现，再编译启动，正常。执行请求报序列化出了问题org.springframework.http.converter.HttpMessageConversionException: Type definition error: [simple type, class ml.iamwhatiam.baostock.infrastructure.rpc.QueryHistoryKDataPlusResponse$Quotation]; nested exception is com.fasterxml.jackson.databind.exc.InvalidDefinitionException: No serializer found for class ml.iamwhatiam.baostock.infrastructure.rpc.QueryHistoryKDataPlusResponse$Quotation and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) (through reference chain: ml.iamwhatiam.baostock.infrastructure.web.WrapResponseBodyAdvice$Wrapper[＂data＂]->ml.iamwhatiam.baostock.infrastructure.rpc.QueryHistoryKDataPlusResponse[＂data＂]->java.util.ArrayList[0]) at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.writeInternal(AbstractJackson2HttpMessageConverter.java:462) at org.springframework.http.converter.AbstractGenericHttpMessageConverter.write(AbstractGenericHttpMessageConverter.java:104) at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMethodProcessor.java:290) at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.handleReturnValue(RequestResponseBodyMethodProcessor.java:183) at org.springframework.web.method.support.HandlerMethodReturnValueHandlerComposite.handleReturnValue(HandlerMethodReturnValueHandlerComposite.java:78) at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:135) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808) at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1067) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) at javax.servlet.http.HttpServlet.service(HttpServlet.java:655) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) at javax.servlet.http.HttpServlet.service(HttpServlet.java:764) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:540) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:359) at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:399) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:889) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1735) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191) at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:833) at com.oracle.svm.core.thread.JavaThreads.threadStartRoutine(JavaThreads.java:600) at com.oracle.svm.core.windows.WindowsJavaThreads.osThreadStartRoutine(WindowsJavaThreads.java:138)
　　考虑到序列化，之前已经添加过SerializationHint，单测时发现没有注册JavaTimeModule会报错。然而查看HttpMessageConverter时，可以看到Jackson2ObjectMapperBuilder.build会自动注册JavaTimeModule。
　　猜测可能是序列化要反射获取getter方法或字段，于是修改序列化配置代码如下：@NativeHint(trigger = ResponseBodyAdvice.class, serializables = {         @SerializationHint(types = {                 Integer.class,                 String.class,                 LocalDate.class,                 LocalDateTime.class,                 BigDecimal.class,                 StockVO.class,                 BaoStockResponse.class,                 QueryHistoryKDataPlusResponse.class,         }, typeNames = { // nested types must be specific using a $ separator                 ＂ml.iamwhatiam.baostock.infrastructure.web.WrapResponseBodyAdvice$Wrapper＂,                 ＂ml.iamwhatiam.baostock.infrastructure.rpc.QueryHistoryKDataPlusResponse$Quotation＂,                 ＂ml.iamwhatiam.baostock.infrastructure.rpc.QueryHistoryKDataPlusResponse$Frequency＂         })}, types = {         @TypeHint(typeNames = {                 ＂ml.iamwhatiam.baostock.infrastructure.rpc.QueryHistoryKDataPlusResponse$Quotation＂,         }, access = {TypeAccess.DECLARED_METHODS, TypeAccess.PUBLIC_METHODS}) })
　　ok，终于解决了。
　　不过也遗留了一个问题，spring-native本身使用了bytebuddy，那么我们的事务究竟要如何配置使用呢？