我有以下Grails控制器操作：
def index() {
def facebookUser = FacebookUser.findByUid(facebookUserId, [lock: true])
facebookContext.user.exchangeToken()
FacebookUser.withTransaction {
facebookUser.lock()
facebookUser.accessToken = accessToken
facebookUser.accessTokenExpires = new Date(facebookContext.user.tokenExpirationTime)
facebookUser.save(flush: true, failOnError: true)
} // end withTransaction
}
有时我会收到以下错误：
org.hibernate.StaleObjectStateException
Message
Executing action [success] of controller [test.FacebookController] caused exception: Runtime error executing action
Caused by
Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [test.FacebookUser#180]
Caused by HibernateOptimisticLockingFailureException: Object of class [test.FacebookUser] with identifier [180]: optimistic locking failed; nested exception is org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [test.FacebookUser#180]
->> 683 | convertHibernateAccessException in org.springframework.orm.hibernate3.SessionFactoryUtils
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 412 | convertHibernateAccessException in org.springframework.orm.hibernate3.HibernateAccessor
| 411 | doExecute . . . . . . . . . . . in org.springframework.orm.hibernate3.HibernateTemplate
| 374 | executeWithNativeSession in ''
| 663 | lock . . . . . . . . . . . . . in ''
| -1 | call in org.springframework.orm.hibernate3.HibernateOperations$lock
| 864 | lock . . . . . . . . . . . . . in org.codehaus.groovy.grails.orm.hibernate.HibernateGormInstanceApi
| -1 | lock in test.FacebookUser
| 419 | doCall . . . . . . . . . . . . in test.FacebookController$_success_closure5
| -1 | invoke in sun.reflect.GeneratedMethodAccessor2580
| 43 | invoke . . . . . . . . . . . . in sun.reflect.DelegatingMethodAccessorImpl
| 606 | invoke in java.lang.reflect.Method
| 90 | invoke . . . . . . . . . . . . in org.codehaus.groovy.reflection.CachedMethod
| 233 | doMethodInvoke in groovy.lang.MetaMethod
| 1085 | invokeMethod . . . . . . . . . in groovy.lang.MetaClassImpl
| 1110 | invokeMethod in groovy.lang.ExpandoMetaClass
| 909 | invokeMethod . . . . . . . . . in groovy.lang.MetaClassImpl
| 411 | call in groovy.lang.Closure
| 51 | invokeCustom . . . . . . . . . in org.codehaus.groovy.runtime.ConvertedClosure
| 82 | invoke in org.codehaus.groovy.runtime.ConversionHandler
| -1 | doInTransaction . . . . . . . . in com.sun.proxy.$Proxy57
| 130 | execute in org.springframework.transaction.support.TransactionTemplate
| -1 | invoke . . . . . . . . . . . . in sun.reflect.GeneratedMethodAccessor1546
| 43 | invoke in sun.reflect.DelegatingMethodAccessorImpl
| 606 | invoke . . . . . . . . . . . . in java.lang.reflect.Method
| 189 | invoke in org.codehaus.groovy.runtime.callsite.PojoMetaMethodSite$PojoCachedMethodSite
| 53 | call . . . . . . . . . . . . . in org.codehaus.groovy.runtime.callsite.PojoMetaMethodSite
| 116 | call in org.codehaus.groovy.runtime.callsite.AbstractCallSite
| 687 | withTransaction . . . . . . . . in org.grails.datastore.gorm.GormStaticApi
| -1 | withTransaction in test.FacebookUser
| 418 | success . . . . . . . . . . . . in test.FacebookController
...
我知道我必须使用的Error: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect)这样的答案你可以使用悲观锁定，这就是我做了两次。
在我的情况下，我该怎么做才能防止出现此错误？