repository.save()拋出錯誤的例外-有解無憂

我正在使用擴展的 jpa 存盤庫將CrudRepository物件保存到資料庫中。

該物件在其中一列上有一個唯一索引，如果我嘗試兩次保存相同的值，它會拋出一個java.sql.SQLIntegrityConstraintViolationException.

當我嘗試創建一個重新創建此行為的測驗時：

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

我有一個

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

如果我嘗試SQLIntegrityConstraintViolationException在 try-catch 的 catch 運算式中使用，也會出現錯誤。

這是因為CrudRepository.save不應該拋出那種例外。基于這個答案https://stackoverflow.com/a/28650987/5913107，存盤庫應該特別拋出一個NonTransientDataAccessException：DataIntegrityViolationException。但是例外似乎被SQLIntegrityConstraintViolationException. 如果我嘗試捕獲DataIntegrityViolationException例外，則不會捕獲。

我不知道該怎么做，因為我拋出了一個例外，因為它不應該被拋出，所以我無法捕獲。

代碼：

@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();

物體：

@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;
}

存盤庫：

@Repository
public interface DocsRepository extends CrudRepository<Doc, String> {
    Collection<Doc> findAll();

    Optional<Doc> findByHash(String hash);

    void deleteAll();
}

這是跟蹤的相關部分：

"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)

uj5u.com熱心網友回復：

您可能會發現此執行緒很有用，它類似于您在捕獲 SQLIntegrityConstraintViolationException 時遇到的問題。

uj5u.com熱心網友回復：

問題是注釋 @Transactional 正在“劫持”例外。我們最終洗掉了注釋，因為我們意識到這部分代碼不需要它。

我們想出的另一種解決方法是捕獲Exception和檢查，instanceOf但我們不喜歡這樣。

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標籤：爪哇休眠 jpa 弹簧数据-jpa

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