mysql上的Grails事務setSavePoint方法導致異常

Question

我在MySQL 5中使用grails。在服務中使用.withTransaction進行事務管理。 在withTransaction塊中，我正在使用savePoint（）方法，這將導致以下異常。 注意：我正在使用setRollbackOnly（）方法，沒有任何問題。

2011-06-26 23:02:37,818 [quartzScheduler_Worker-7] ERROR listeners.ExceptionPrinterJobListener  - Exception occured in job: GRAILS_JOBS.com.exmp.bdg.PowerRollupJob
org.quartz.JobExecutionException: Transaction manager does not allow nested transactions [See nested exception: org.springframework.transaction.NestedTransactionNotSupportedException: Transaction manager does not allow nested transactions]
    at org.codehaus.groovy.grails.plugins.quartz.GrailsJobFactory$GrailsTaskClassJob.execute(GrailsJobFactory.java:81)
    at org.quartz.core.JobRunShell.run(JobRunShell.java:199)
    at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:546)
Caused by: org.springframework.transaction.NestedTransactionNotSupportedException: Transaction manager does not allow nested transactions
    at org.springframework.jdbc.datasource.JdbcTransactionObjectSupport.getConnectionHolderForSavepoint(JdbcTransactionObjectSupport.java:151)
    at org.springframework.jdbc.datasource.JdbcTransactionObjectSupport.createSavepoint(JdbcTransactionObjectSupport.java:104)
    at org.springframework.transaction.support.AbstractTransactionStatus.createSavepoint(AbstractTransactionStatus.java:176)
    at org.springframework.transaction.SavepointManager$createSavepoint.call(Unknown Source)
    at com.exmp.bdg.service.PowerRollupService$_doRollup_closure2.doCall(PowerRollupService.groovy:85)

Answer 1

默認情況下，休眠和MySQL的事務管理器未啟用保存點。

在BootStrap.groovy中添加以下內容：

transactionManager.setNestedTransactionAllowed(true)

然后，在事務中，您可以執行以下操作：

Thing.withTransaction { status ->
  //Do some work and a save
  def savePoint = status.createSavepoint()
  //do other work
  if(checkOk)
  {
    //Everything worked so don't need the save point anymore
    status.releaseSavepoint(savePoint)
  }
  else
  {
    //The other work did not work so rollback from it.
    status.rollbackToSavepoint(savePoint)
  }

}