例外：由于标准JPA

Question

中的限制，HibernateJpaDialect不支持自定义隔离级别，我对hibernate和spring批处理相对来说比较新。我正在尝试为我的应用程序和作业存储库（在spring批处理中）配置类似的数据库配置。这是一个JPA + Hibernate + Spring组合。

下面是相关的（休眠+ JPA专用）DB-configurations.xml看起来像......

<bean id="entityManagerFactory" 
    class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"> 
    <property name="dataSource" ref="dataSource" /> 
    <property name="packagesToScan"> 
     <list> 
      <value>some.model.SomeClass 
      </value> 
     </list> 
    </property> 
    <property name="jpaVendorAdapter"> 
     <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"> 
      <property name="showSql" value="true" /> 
      <property name="generateDdl" value="false" /> 
      <property name="databasePlatform" value="org.hibernate.dialect.PostgreSQLDialect" /> 
      <property name="database" value="POSTGRESQL" /> 
     </bean> 
    </property> 
    <property name="jpaProperties"> 
     <map> 
      <entry key="hibernate.format_sql" value="true" /> 
     </map> 
    </property> 
    <property name="jpaDialect"> 
     <bean class="org.springframework.orm.jpa.vendor.HibernateJpaDialect" /> 
    </property> 
</bean> 

而且，这里是我用我的项目中组件的版本

<spring.batch.version>3.0.1.RELEASE</spring.batch.version> 
    <spring.version>4.1.1.RELEASE</spring.version> 
    <spring.data.version>1.7.0.RELEASE</spring.data.version> 
    <commons.dbcp.version>1.4</commons.dbcp.version> 
    <postgresql.driver.version>9.1-901-1.jdbc4</postgresql.driver.version> 
    <hibernate.entitymanager.version>4.3.6.Final</hibernate.entitymanager.version> 
    <hibernate.jpa.api>1.0.1.Final</hibernate.jpa.api> 

但是，当我尝试运行测试时，出现此错误。谷歌搜索也，我找不到如何解决这个问题。有人可以建议什么吗？

org.springframework.transaction.InvalidIsolationLevelException: HibernateJpaDialect does not support custom isolation levels due to limitations in standard JPA. Specific arrangements may be implemented in custom JpaDialect variants. 
at org.springframework.orm.jpa.DefaultJpaDialect.beginTransaction(DefaultJpaDialect.java:63) 
at org.springframework.orm.jpa.vendor.HibernateJpaDialect.beginTransaction(HibernateJpaDialect.java:110) 
at org.springframework.orm.jpa.JpaTransactionManager.doBegin(JpaTransactionManager.java:380) 
at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:373) 
at org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:438) 
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:261) 
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:95) 
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) 
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207) 
at com.sun.proxy.$Proxy14.getLastJobExecution(Unknown Source) 
at org.springframework.batch.core.launch.support.SimpleJobLauncher.run(SimpleJobLauncher.java:98) 
at au.com.optus.selene.selenebatch.notification.NotificationTest.importProducts(NotificationTest.java:36) 
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
at java.lang.reflect.Method.invoke(Method.java:597) 
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47) 
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) 
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44) 
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) 
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26) 
at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:72) 
at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:81) 
at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:72) 
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271) 
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:216) 
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:82) 
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238) 
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63) 
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236) 
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53) 
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229) 
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:60) 
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:67) 
at org.junit.runners.ParentRunner.run(ParentRunner.java:309) 
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:162) 
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50) 
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) 
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467) 
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683) 
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390) 
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197) 

Answer 1

我在使用Spring Batch时遇到了类似的问题。 的问题在课堂上org.springframework.batch.core.repository.support.JobRepositoryFactoryBean使用非默认的隔离级别“ISOLATION_SERIALIZABLE”撒谎（从AbstractJobRepositoryFactoryBean）：

private String isolationLevelForCreate = DEFAULT_ISOLATION_LEVEL; 
[...] 
/** 
* Default value for isolation level in create* method. 
*/ 
private static final String DEFAULT_ISOLATION_LEVEL = "ISOLATION_SERIALIZABLE"; 

我解决它通过该属性明确设置为org.springframework.transaction.TransactionDefinition的默认隔离级别：

<bean id="jobRepository" class="org.springframework.batch.core.repository.support.JobRepositoryFactoryBean"> 
    [...] 
     <property name="isolationLevelForCreate" value="ISOLATION_DEFAULT"/> 
    [...] 
</bean> 

这可能是你的问题的原因也是。