repository.save()引发错误的异常

Question

我使用从CrudRepository扩展的jpa存储库将对象保存到DB中。

该对象在其中一列上有一个唯一的索引，如果我尝试保存两次相同的值，它会抛出一个java.sql.SQLIntegrityConstraintViolationException。

当我试图创建一个重现这种行为的测试时：

when(docsRepository.save(doc)).thenThrow(SQLIntegrityConstraintViolationException.class);
classThatCallsToSave(doc)

我有

org.mockito.exceptions.base.MockitoException: 
Checked exception is invalid for this method!
Invalid: java.sql.SQLIntegrityConstraintViolationException

如果尝试在try-catch的catch表达式中使用SQLIntegrityConstraintViolationException，也会出现错误。

这是因为CrudRepository.save不应该抛出那种异常。基于这个答案https://stackoverflow.com/a/28650987/5913107，存储库应该抛出一个NonTransientDataAccessException，特别是：DataIntegrityViolationException。但这个异常似乎被SQLIntegrityConstraintViolationException所包裹。如果我试图捕获DataIntegrityViolationException，则异常不是捕获。

我不知道该怎么办，因为我有一个异常被抛出，因为它不应该被抛出，我无法接住。

代码：

@Transactional
public getDocument(String docName){
var hash = hash(docName);
createDoc(docName, hash)
}
private String createDoc(String name, String hash) {
var doc = new Doc(
name,
hash);
try {
docsRepository.save(doc);
} catch (ConstraintViolationException e) {
token = tokensRepository.findByHash(hash).get();
}
return token.getValue();

实体：

@Entity
@Table(name = "docs",
indexes = {
@Index(name = "HASH_IDX", columnList = "hash", unique = true)
})
public class Doc {
public String getValue() {
return value;
}
@Id
@NotNull
private String value;
@NotNull
private String hash;
}

存储库：

@Repository
public interface DocsRepository extends CrudRepository<Doc, String> {
Collection<Doc> findAll();
Optional<Doc> findByHash(String hash);
void deleteAll();
}

这是跟踪的相关部分：

"stack_trace":"java.sql.SQLIntegrityConstraintViolationException: Duplicate entry 'efb12e37f6b898b576dd051cf1fcbd78be6bbea19316e591b03ac98e3f922f18' for key 'docss.HASH_IDX'
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:117)
at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:122)
at com.mysql.cj.jdbc.ClientPreparedStatement.executeInternal(ClientPreparedStatement.java:953)
at com.mysql.cj.jdbc.ClientPreparedStatement.executeUpdateInternal(ClientPreparedStatement.java:1098)
at com.mysql.cj.jdbc.ClientPreparedStatement.executeUpdateInternal(ClientPreparedStatement.java:1046)
at com.mysql.cj.jdbc.ClientPreparedStatement.executeLargeUpdate(ClientPreparedStatement.java:1371)
at com.mysql.cj.jdbc.ClientPreparedStatement.executeUpdate(ClientPreparedStatement.java:1031)
at com.zaxxer.hikari.pool.ProxyPreparedStatement.executeUpdate(ProxyPreparedStatement.java:61)
at com.zaxxer.hikari.pool.HikariProxyPreparedStatement.executeUpdate(HikariProxyPreparedStatement.java)
at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:197)
... 102 common frames omitted
Wrapped by: org.hibernate.exception.ConstraintViolationException: could not execute statement
at org.hibernate.exception.internal.SQLExceptionTypeDelegate.convert(SQLExceptionTypeDelegate.java:59)
at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:42)
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:113)
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:99)
at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:200)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3298)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3825)
at org.hibernate.action.internal.EntityInsertAction.execute(EntityInsertAction.java:107)
at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:604)
at org.hibernate.engine.spi.ActionQueue.lambda$executeActions$1(ActionQueue.java:478)
at java.util.LinkedHashMap.forEach(LinkedHashMap.java:721)
at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:475)
at org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:344)
at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:40)
at org.hibernate.event.service.internal.EventListenerGroupImpl.fireEventOnEachListener(EventListenerGroupImpl.java:99)
at org.hibernate.internal.SessionImpl.doFlush(SessionImpl.java:1362)
at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:453)
at org.hibernate.internal.SessionImpl.flushBeforeTransactionCompletion(SessionImpl.java:3212)
at org.hibernate.internal.SessionImpl.beforeTransactionCompletion(SessionImpl.java:2380)
at org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl.beforeTransactionCompletion(JdbcCoordinatorImpl.java:448)
at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.beforeCompletionCallback(JdbcResourceLocalTransactionCoordinatorImpl.java:183)
at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.access$300(JdbcResourceLocalTransactionCoordinatorImpl.java:40)
at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl$TransactionDriverControlImpl.commit(JdbcResourceLocalTransactionCoordinatorImpl.java:281)
at org.hibernate.engine.transaction.internal.TransactionImpl.commit(TransactionImpl.java:101)
at org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:562)
... 82 common frames omitted
Wrapped by: org.springframework.dao.DataIntegrityViolationException: could not execute statement; SQL [n/a]; constraint [docs.HASH_IDX]; nested exception is org.hibernate.exception.ConstraintViolationException: could not execute statement
at org.springframework.orm.jpa.vendor.HibernateJpaDialect.convertHibernateAccessException(HibernateJpaDialect.java:276)
at org.springframework.orm.jpa.vendor.HibernateJpaDialect.translateExceptionIfPossible(HibernateJpaDialect.java:233)
at org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:566)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:743)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:711)
at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:654)
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:407)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:119)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:753)
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:698)
at com.foo.bar.Document.domain.DocumentService$$EnhancerBySpringCGLIB$$1801847c.getDocument(<generated>)
at com.foo.bar.Document.rest.GetDocumentResource.getDocument(GetDocumentResource.java:21)
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java)
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
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)

Answer 1

您可能会发现这个线程很有用，它类似于您面临的捕获SQLIntegrityConstraintViolationException的问题。

Answer 2

问题是注释@Transactional是"劫持；例外。我们最终删除了注释，因为我们意识到代码的这一部分不需要它。

我们提出的另一种解决方案是捕获Exception并检查instanceOf，但我们不喜欢这样。