class Election:
"""Election class."""
def __init__(self, events_queue=None):
self.bigchain = Bigchain()
self.events_queue = events_queue
def check_for_quorum(self, next_vote):
"""
Checks if block has enough invalid votes to make a decision
Args:
next_vote: The next vote.
"""
try:
block_id = next_vote['vote']['voting_for_block']
node = next_vote['node_pubkey']
except KeyError:
return
next_block = self.bigchain.get_block(block_id)
result = self.bigchain.block_election(next_block)
self.handle_block_events(result, block_id)
if result['status'] == self.bigchain.BLOCK_INVALID:
return Block.from_dict(next_block)
# Log the result
if result['status'] != self.bigchain.BLOCK_UNDECIDED:
msg = 'node:%s block:%s status:%s' % \
(node, block_id, result['status'])
# Extra data can be accessed via the log formatter.
# See logging.dictConfig.
logger_results.debug(msg,
extra={
'current_vote': next_vote,
'election_result': result,
})
def requeue_transactions(self, invalid_block):
"""
Liquidates transactions from invalid blocks so they can be processed again
"""
logger.info('Rewriting %s transactions from invalid block %s',
len(invalid_block.transactions), invalid_block.id)
for tx in invalid_block.transactions:
self.bigchain.write_transaction(tx)
return invalid_block
def handle_block_events(self, result, block_id):
if self.events_queue:
if result['status'] == self.bigchain.BLOCK_UNDECIDED:
return
elif result['status'] == self.bigchain.BLOCK_INVALID:
event_type = EventTypes.BLOCK_INVALID
elif result['status'] == self.bigchain.BLOCK_VALID:
event_type = EventTypes.BLOCK_VALID
event = Event(event_type, self.bigchain.get_block(block_id))
self.events_queue.put(event)
class Election:
"""Election class."""
def __init__(self, events_queue=None):
self.bigchain = Bigchain()
self.events_queue = events_queue
def check_for_quorum(self, next_vote):
"""Checks if block has enough invalid votes to make a decision
Args:
next_vote: The next vote.
"""
try:
block_id = next_vote['vote']['voting_for_block']
node = next_vote['node_pubkey']
except KeyError:
return
next_block = self.bigchain.get_block(block_id)
result = self.bigchain.block_election(next_block)
self.handle_block_events(result, block_id)
if result['status'] == self.bigchain.BLOCK_INVALID:
return Block.from_dict(next_block)
# Log the result
if result['status'] != self.bigchain.BLOCK_UNDECIDED:
msg = 'node:%s block:%s status:%s' % \
(node, block_id, result['status'])
# Extra data can be accessed via the log formatter.
# See logging.dictConfig.
logger_results.debug(msg, extra={
'current_vote': next_vote,
'election_result': result,
})
def requeue_transactions(self, invalid_block):
"""Liquidates transactions from invalid blocks so they can be processed again
"""
logger.info('Rewriting %s transactions from invalid block %s',
len(invalid_block.transactions),
invalid_block.id)
for tx in invalid_block.transactions:
self.bigchain.write_transaction(tx)
return invalid_block
def handle_block_events(self, result, block_id):
if self.events_queue:
if result['status'] == self.bigchain.BLOCK_UNDECIDED:
return
elif result['status'] == self.bigchain.BLOCK_INVALID:
event_type = EventTypes.BLOCK_INVALID
elif result['status'] == self.bigchain.BLOCK_VALID:
event_type = EventTypes.BLOCK_VALID
event = Event(event_type, self.bigchain.get_block(block_id))
self.events_queue.put(event)
class Election:
"""Election class."""
def __init__(self):
self.bigchain = Bigchain()
def check_for_quorum(self, next_vote):
"""
Checks if block has enough invalid votes to make a decision
Args:
next_vote: The next vote.
"""
next_block = self.bigchain.get_block(
next_vote['vote']['voting_for_block'])
block_status = self.bigchain.block_election_status(next_block['id'],
next_block['block']['voters'])
if block_status == self.bigchain.BLOCK_INVALID:
return Block.from_dict(next_block)
def requeue_transactions(self, invalid_block):
"""
Liquidates transactions from invalid blocks so they can be processed again
"""
logger.info('Rewriting %s transactions from invalid block %s',
len(invalid_block.transactions),
invalid_block.id)
for tx in invalid_block.transactions:
self.bigchain.write_transaction(tx)
return invalid_block
class Election:
"""Election class."""
def __init__(self):
self.bigchain = Bigchain()
def check_for_quorum(self, next_vote):
"""
Checks if block has enough invalid votes to make a decision
Args:
next_vote: The next vote.
"""
next_block = self.bigchain.get_block(
next_vote['vote']['voting_for_block'])
block_status = self.bigchain.block_election_status(
next_block['id'], next_block['block']['voters'])
if block_status == self.bigchain.BLOCK_INVALID:
return Block.from_dict(next_block)
def requeue_transactions(self, invalid_block):
"""
Liquidates transactions from invalid blocks so they can be processed again
"""
logger.info('Rewriting %s transactions from invalid block %s',
len(invalid_block.transactions), invalid_block.id)
for tx in invalid_block.transactions:
self.bigchain.write_transaction(tx)
return invalid_block
