def handleOperationAndAcknowledgeTheCoordinator(self):
messageType = None
if self.Operation.Type == DSMessageType.SetNewValue:
self.temporarilySetNewValueHandler()
messageType = DSMessageType.VoteCommit
elif self.Operation.Type == DSMessageType.RollbackValues:
self.temporarilyRollbackValuesHandler()
messageType = DSMessageType.VoteCommit
if self.flipParticipantAcknowledge == True:
if messageType == DSMessageType.VoteCommit:
messageType = DSMessageType.VoteAbort
else:
messageType = DSMessageType.VoteCommit
if messageType == DSMessageType.VoteCommit:
self.State = DSParticipantOperationStatus.READY
else:
self.Abort()
coordinatorProcess = dsProcessManager.GetCoordinator()
coordinatorProcess.DSSocket.SendMessage(
DSMessage(messageType, self.CoordinatorTransactionId))
if messageType == DSMessageType.VoteCommit:
#if we are sending VoteCommit, means that the participant in the ready state
# and should wait specific amount of time for the response from coordinatory
self.dsTimeout.Run(self.onReadyTimeout)
def setNewValue(value):
coordinator = dsProcessManager.GetCoordinator()
if coordinator == None:
return 'coordinator is not available'
val = coordinator.DSSocket.SendMessage(
DSMessage(DSMessageType.SetNewValue, value))
if val == 'timeout':
val = 'timeout: coordinator is not responding'
return val
def rollbackFromPosition(position):
coordinator = dsProcessManager.GetCoordinator()
if coordinator == None:
return 'coordinator is not available'
val = coordinator.DSSocket.SendMessage(
DSMessage(DSMessageType.RollbackValues, position))
if val == 'timeout':
val = 'timeout: coordinator is not responding'
return val
def addProcess(pid):
coordinator = dsProcessManager.GetCoordinator()
if coordinator == None:
return 'coordinator is not available'
newProcess = dsProcessManager.GetProcessByID(pid)
if newProcess != None:
return 'the process id is duplicate'
newProcess = DSProcess(pid, False)
val = coordinator.DSSocket.SendMessage(
DSMessage(DSMessageType.SyncNewProcess, newProcess))
if val == 'timeout':
return 'timeout: coordinator is not responding'
newProcess.Run()
dsProcessManager.AddProcesses([newProcess])
dataStr = newProcess.DSSocket.SendMessage(DSMessage(DSMessageType.GetData))
return 'the process with the id \'' + pid + '\' is added and its data is [' + dataStr + ']'
def PreCommit(self):
self.State = DSParticipantOperationStatus.PRECOMMIT
coordinatorProcess = dsProcessManager.GetCoordinator()
coordinatorProcess.DSSocket.SendMessage(DSMessage(DSMessageType.PreCommitAcknowledge, self.CoordinatorTransactionId))