def getElectionMsgsForInstance(self, instId: int) -> \
Sequence[Union[Nomination, Primary]]:
"""
Get nomination and primary messages for instance with id `instId`.
"""
msgs = []
replica = self.replicas[instId]
# If a primary for this instance has been selected then send a
# primary declaration for the selected primary
if replica.isPrimary is not None:
msgs.append(Primary(replica.primaryName, instId, self.viewNo,
replica.last_ordered_3pc[1]))
else:
# If a primary for this instance has not been selected then send
# nomination and primary declaration that this node made for the
# instance with id `instId`
if self.didReplicaNominate(instId):
nm, seqNo = self.nominations[instId][replica.name]
msgs.append(Nomination(nm, instId, self.viewNo, seqNo))
if self.didReplicaDeclarePrimary(instId):
nm, seqNo = self.primaryDeclarations[instId][replica.name]
msgs.append(Primary(nm, instId, self.viewNo, seqNo))
return msgs
def sendPrimary(self, instId: int, primaryName: str,
lastOrderedSeqNo: int):
"""
Declare a primary and broadcast the message.
:param instId: the instanceId to which the primary belongs
:param primaryName: the name of the primary replica
"""
replica = self.replicas[instId]
self.primaryDeclarations[instId][replica.name] = (primaryName,
lastOrderedSeqNo)
self.scheduledPrimaryDecisions[instId] = None
logger.info("{} declaring primary as: {} on the basis of {}".format(
replica, primaryName, self.nominations[instId]))
prim = Primary(primaryName, instId, self.viewNo, lastOrderedSeqNo)
self.send(prim)
self.select_primary(instId, prim)
def testBlacklistNodeOnMultiplePrimaryDeclarations(looper, txnPoolNodeSet):
"""
A node that sends multiple primary declarations must be blacklisted by
other nodes
"""
A, B, C, D = txnPoolNodeSet
# B sends more than 2 primary declarations
for i in range(3):
B.send(Primary(D.name, 0, B.viewNo))
# B should be blacklisted by A, C, D
def chk():
for node in A, C, D:
assert node.isNodeBlacklisted(B.name)
timeout = waits.expectedPoolNominationTimeout(len(txnPoolNodeSet))
looper.run(eventually(chk, retryWait=1, timeout=timeout))
def primaryByNode(name: str, byNode: TestNode, instId: int):
return Primary(name, instId, byNode.viewNo,
byNode.replicas[instId].lastOrderedPPSeqNo[1])