Closed
Description
Since Spring Boot 2.2(not release yet), the lazy Initialization feature will be support. For details see https://spring.io/blog/2019/03/14/lazy-initialization-in-spring-boot-2-2. When it is enabled and one-to-one or one-to-many relationship map using @One or @Many, there are cases that it does not work fine.
Known case is as follow:
@Mapper
public interface GoodsMapper {
@Select("select * from goods where id=#{goodsId}")
@Results({
@Result(id = true, column = "id", property = "id"),
@Result(column = "name", property = "name"),
@Result(column = "vendor_id", property = "vendor",
one = @One(select = "com.example.mybatisspringboot22demo.VendorMapper.getVendor"))
})
Goods getGoods(@Param("goodsId") Integer goodsId);
}@Mapper
public interface VendorMapper {
@Select("select * from vendor where id=#{vendorId}")
Vendor getVendor(@Param("vendorId") String vendorId);
}org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException:
### Error querying database. Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for com.example.mybatisspringboot22demo.VendorMapper.getVendor
### The error may exist in com/example/mybatisspringboot22demo/GoodsMapper.java (best guess)
### The error may involve com.example.mybatisspringboot22demo.GoodsMapper.getGoods
### The error occurred while handling results
### SQL: select * from goods where id=?
### Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for com.example.mybatisspringboot22demo.VendorMapper.getVendor
at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:77)
at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:446)
at com.sun.proxy.$Proxy56.selectOne(Unknown Source)
at org.mybatis.spring.SqlSessionTemplate.selectOne(SqlSessionTemplate.java:166)
at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:87)
at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:58)
at com.sun.proxy.$Proxy58.getGoods(Unknown Source)
at com.example.mybatisspringboot22demo.MybatisSpringBoot22DemoApplicationTests.contextLoads(MybatisSpringBoot22DemoApplicationTests.java:18)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.springframework.test.context.junit4.statements.RunBeforeTestExecutionCallbacks.evaluate(RunBeforeTestExecutionCallbacks.java:74)
at org.springframework.test.context.junit4.statements.RunAfterTestExecutionCallbacks.evaluate(RunAfterTestExecutionCallbacks.java:84)
at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:251)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
Caused by: org.apache.ibatis.exceptions.PersistenceException:
### Error querying database. Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for com.example.mybatisspringboot22demo.VendorMapper.getVendor
### The error may exist in com/example/mybatisspringboot22demo/GoodsMapper.java (best guess)
### The error may involve com.example.mybatisspringboot22demo.GoodsMapper.getGoods
### The error occurred while handling results
### SQL: select * from goods where id=?
### Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for com.example.mybatisspringboot22demo.VendorMapper.getVendor
at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30)
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:149)
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:140)
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:76)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:433)
... 36 more
Caused by: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for com.example.mybatisspringboot22demo.VendorMapper.getVendor
at org.apache.ibatis.session.Configuration$StrictMap.get(Configuration.java:946)
at org.apache.ibatis.session.Configuration.getMappedStatement(Configuration.java:739)
at org.apache.ibatis.session.Configuration.getMappedStatement(Configuration.java:732)
at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.getNestedQueryMappingValue(DefaultResultSetHandler.java:743)
at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.getPropertyMappingValue(DefaultResultSetHandler.java:465)
at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.applyPropertyMappings(DefaultResultSetHandler.java:441)
at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.getRowValue(DefaultResultSetHandler.java:404)
at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleRowValuesForSimpleResultMap(DefaultResultSetHandler.java:354)
at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleRowValues(DefaultResultSetHandler.java:328)
at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleResultSet(DefaultResultSetHandler.java:301)
at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleResultSets(DefaultResultSetHandler.java:194)
at org.apache.ibatis.executor.statement.PreparedStatementHandler.query(PreparedStatementHandler.java:65)
at org.apache.ibatis.executor.statement.RoutingStatementHandler.query(RoutingStatementHandler.java:79)
at org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:63)
at org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:324)
at org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:156)
at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:109)
at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:83)
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:147)
... 43 more
Solutions
Add lazyInitialization option on <mybatis:scan> and @MapperScan. The default value is false(=not use lazy initialization). If developer want to use lazy initialization for mapper bean, it should be set to the true expressly.
e.g.)
<mybatis:scan base-package="org.mybatis.spring.mapper"
lazy-initialization="${mybatis.lazy-initialization:false}" />@MapperScan(basePackages = "org.mybatis.spring.mapper",
lazyInitialization = "${mybatis.lazy-initialization:false}")
public class MyBatisConfig {
// ...
}Limitations
Description
If following feature use, cannot use lazy Initialization.
-
ref statement on
@Oneor@Many(<association select="...">or<collection select="...">) with other mapper statement -
include fragment with other mapper statement (
<include refid="...">) -
ref cache with other mapper cache (
<cache-ref namespace="...">) -
ref resultMap with other mapper result map (
<select resultMap="...">)
Solution for limitations
- Specify the bean name of dependency's mapper using
@DependsOn(Spring's annotation)
@Mapper
@DependsOn("vendorMapper")
public interface GoodsMapper {
// ...
}