class Acceptor (object):
_sync = {}
_async = ['set_multi', 'onPrepare', 'accept']
_ref = ['set_multi', 'onPrepare']
_parallel = []
def __init__(self, quorum_size):
self.accepted_id = {}
self.quorum_size = quorum_size
self.accepted_value = {}
self.promised_id = {}
def set_multi(self, learners):
self.learners = learners
self.amulti = AMulti(self.learners)
def onPrepare(self, proposer, index, proposal_id):
'''
Called when a Prepare message is received from a Proposer
'''
if not self.accepted_id.has_key(index):
self.accepted_id[index] = None
self.accepted_value[index] = None
try:
if proposal_id == self.promised_id[index]:
# Duplicate prepare message
proposer.promise(self.id, proposal_id, index, self.accepted_id[index], self.accepted_value[index])
elif proposal_id > self.promised_id[index]:
self.promised_id[index] = proposal_id
proposer.promise(self.id, proposal_id, index, self.accepted_id[index], self.accepted_value[index])
except:
self.promised_id[index] = proposal_id
proposer.promise(self.id, proposal_id, index, self.accepted_id[index], self.accepted_value[index])
def accept(self, from_uid, index, proposal_id, value):
'''
Called when an Accept! message is received from a Proposer
'''
if proposal_id >= self.promised_id[index]:
self.promised_id[index] = proposal_id
self.accepted_id[index] = proposal_id
self.accepted_value[index] = value
'''send accepted to all learners!! '''
self.amulti.accepted(self.id, proposal_id, index,self.accepted_value[index])
class Acceptor (object):
_sync = {'onPrepare':'2'}
_async = ['set_multi', 'accept']
_ref = ['set_multi', 'onPrepare']
_parallel = []
def __init__(self, quorum_size):
self.accepted_id = None
self.quorum_size = quorum_size
self.accepted_value = None
self.promised_id = None
def set_multi(self, learners):
self.learners = learners
self.amulti = AMulti(self.learners)
def onPrepare(self, proposer, proposal_id):
'''
Called when a Prepare message is received from a Proposer
'''
if proposal_id == self.promised_id:
# Duplicate prepare message
return [self.id, proposal_id, self.accepted_id, self.accepted_value]
elif proposal_id > self.promised_id:
self.promised_id = proposal_id
return [self.id, proposal_id, self.accepted_id, self.accepted_value]
def accept(self, from_uid, proposal_id, value):
'''
Called when an Accept! message is received from a Proposer
'''
if proposal_id >= self.promised_id:
self.promised_id = proposal_id
self.accepted_id = proposal_id
self.accepted_value = value
'''send accepted to all learners!! '''
self.amulti.accepted(self.id, proposal_id, self.accepted_value)
