A dynamic method for deal with Optimistic Locking in Grails with retries & timeout. Please consider the following for a correct usage: 1) Call withOptimisticLocking outside any transaction, 2) Ensure only one transaction is created inside withOptimisticLocking

Grails-withOptimisticLocking

grailsClass.metaClass.withOptimisticLocking = { Long timeout = 3000L, Closure cls ->
  def startTime = new Date().time
  def duration = 0
  def attempts = 0
  while (true) {
    try {
      attempts++
      cls.call()
      break
    } catch (OptimisticLockingFailureException e) {
      duration = new Date().time - startTime
      if (duration > timeout) {
        log.warn("withOptimisticLocking timeout! attempts = ${attempts}")
        throw e
      }
    }
  }
  duration = new Date().time - startTime
  log.info("withOptimistickLocking success! attempts = ${attempts}, duration = ${duration}")
}