class TransactionScheduler:
def __init__(self):
self.current_events_chain = CurrentEventsChain()
self.future_events_chain = FutureEventsChain()
self.clock = 0
def moveNextTransaction(self):
# Removes the Active Transaction from the CEC,
active_transaction = self.current_events_chain.removeActiveTransaction()
if active_transaction:
# Calls the routine for the next sequential Block (NSB)
if active_transaction.getNextSequentialBlock():
# Unless something extraordinary occurs, replaces the Transaction
# in front of its peers (i.e. same priority) on the CEC.
self.current_events_chain.replaceActiveTransaction(active_transaction)
return True
else:
return False
def replenishCecWithFecTransactions(self):
# Removes transactions from the fec for that scheduled time
for transaction in self.future_events_chain.removeNextTransactions(self.clock):
self.current_events_chain.append(transaction)
def addNewTransactions(self, transactions):
for transaction in transactions:
if transaction.isDelayed():
self.future_events_chain.addTransaction(transaction)
else:
self.current_events_chain.addTransaction(transaction)
def advanceClock(self):
self.clock += 1
return self.clock
def __init__(self):
self.current_events_chain = CurrentEventsChain()
self.future_events_chain = FutureEventsChain()
self.clock = 0