Support the GraalVM

[kazuki43zoo]

I will propose to support the GraalVM (native-image). I've try to run the demo application using MyBatis 3.5.1 on GraalVM. But I cannot build a native-image using version 3.5.1. I've applied some temporary fix to MyBatis's core components and it worked on GraalVM.

Known mainly problem on core component

Problems on build-time

• Invoke a default method using reflection (Not found good solution yet)
• Reflection of Javassist object on instance initialization at Configuration (Not found good solution yet)
• Reflection of Class object on static initialization at SystemMetaObject#NULL_META_OBJECT (Found solution -> passed the empty Map instead of Class)

Problems on run-time

• Not work package scanning (Not found good solution yet)
• Not work invoke a annotation method(attribute) using reflection (Found solution -> using annotationType() method instead of getClass()) Add constructor that pass an Annotation type instead of Object on ProviderSqlSource #1611
• Not work dynamic class loading (Found solution -> Resolved using native-image building configuration)
• Not work reflection access to the constructor and method (Found solution -> Resolved using native-image building configuration)

Related Issues and Links

• Cannot create native image when has a code that invoke default method using reflection oracle/graal#1353
• ClassLoader can't solve directories on Graal binary oracle/graal#1108

[zhfeng]

Hi @kazuki43zoo ,

I just find the MethodHandles which used in MapperProxy is not supported in the GraalVM.

https://github.com/oracle/graal/blob/master/substratevm/LIMITATIONS.md#invokedynamic-bytecode-and-method-handles

[linghengqian]

Hi, I noticed a component like Quarkus MyBatis in the update log of version 3.5.8 of Mybatis. Can I understand that Mybatis under Quarkus has supported Native Mode ( that is, supports GraalVM)? Can it be analogized to using Mybatis on Spring Native?

[zhfeng]

Hi @linghengqian,

I'm working on Quarkus MyBatis Extension and it supports the native mode by using Graal VM but not all of the mybatis capabities have been test currently. If you are interesting with this project, feel free to use it and any feedback is welcome !

[ccwxl]

https://github.com/kazuki43zoo/mybatis-spring-native

[kazuki43zoo]

@siaron Thanks for adding link of mybatis-spring-native.

[ccwxl]

@siaron Thanks for adding link of mybatis-spring-native.

The mybatis-plus framework is an extension to myabtis. Consider integration.

[Bahramudin]

Hi everyone! Is there any new updates due to MyBatis can be used with GraalVM? I have compiled my Springboot3 (3.0.6) project with MyBatis latest version (3.5.13), but I am getting the below exception while running the generated .exe file:

java.lang.ExceptionInInitializerError: null
	at org.mybatis.spring.mapper.MapperScannerConfigurer.postProcessBeanDefinitionRegistry(MapperScannerConfigurer.java:363) ~[web.exe:na]
	at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:344) ~[na:na]
	at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:145) ~[na:na]
	at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:747) ~[web.exe:6.0.8]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:565) ~[web.exe:6.0.8]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:146) ~[web.exe:3.0.6]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:732) ~[web.exe:3.0.6]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:434) ~[web.exe:3.0.6]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:310) ~[web.exe:3.0.6]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1304) ~[web.exe:3.0.6]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1293) ~[web.exe:3.0.6]
	at com.adil.bms.web.BmsApplication.main(BmsApplication.java:19) ~[web.exe:na]
Caused by: org.apache.ibatis.logging.LogException: Error creating logger for logger org.mybatis.spring.mapper.ClassPathMapperScanner.  Cause: java.lang.NullPointerException
	at org.apache.ibatis.logging.LogFactory.getLog(LogFactory.java:54) ~[na:na]
	at org.apache.ibatis.logging.LogFactory.getLog(LogFactory.java:47) ~[na:na]
	at org.mybatis.logging.LoggerFactory.getLogger(LoggerFactory.java:32) ~[na:na]
	at org.mybatis.spring.mapper.ClassPathMapperScanner.<clinit>(ClassPathMapperScanner.java:61) ~[na:na]
	... 12 common frames omitted
Caused by: java.lang.NullPointerException: null
	at org.apache.ibatis.logging.LogFactory.getLog(LogFactory.java:52) ~[na:na]
	... 15 common frames omitted

Is there any extra configuration I need to do?
Thanks!

[hazendaz]

known issue, will be looking into it as soon as possible. If anyone else knows how to fix, a PR would be great otherwise might be a while.

[xuxiaowei-com-cn]

✨ Support MyBatis for Spring Boot 3 Native