本文整理汇总了Python中bigchaindb.Bigchain.write_vote方法的典型用法代码示例。如果您正苦于以下问题：Python Bigchain.write_vote方法的具体用法？Python Bigchain.write_vote怎么用？Python Bigchain.write_vote使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类bigchaindb.Bigchain的用法示例。
在下文中一共展示了Bigchain.write_vote方法的4个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: update_block
# 需要导入模块: from bigchaindb import Bigchain [as 别名]
# 或者: from bigchaindb.Bigchain import write_vote [as 别名]
def update_block(self):
"""
Appends the vote in the bigchain table
"""
# create a bigchain instance
b = Bigchain()
while True:
elem = self.q_voted_block.get()
# poison pill
if elem == 'stop':
logger.info('clean exit')
return
block, vote, block_number = elem
logger.info('updating block %s with number %s and with vote %s', block['id'], block_number, vote)
b.write_vote(block, vote, block_number)示例2: update_block
# 需要导入模块: from bigchaindb import Bigchain [as 别名]
# 或者: from bigchaindb.Bigchain import write_vote [as 别名]
def update_block(self):
"""
Appends the vote in the bigchain table
"""
# create a bigchain instance
b = Bigchain()
while True:
elem = self.q_voted_block.get()
# poison pill
if elem == 'stop':
logger.info('clean exit')
return
block, vote = elem
pretty_vote = 'valid' if vote['vote']['is_block_valid'] else 'invalid'
logger.info('voting %s for block %s', pretty_vote, block['id'])
b.write_vote(block, vote)示例3: __init__
# 需要导入模块: from bigchaindb import Bigchain [as 别名]
# 或者: from bigchaindb.Bigchain import write_vote [as 别名]
#.........这里部分代码省略.........
self.bigchain = Bigchain()
self.last_voted_id = Bigchain().get_last_voted_block().id
self.counters = Counter()
self.validity = {}
self.invalid_dummy_tx = Transaction.create([self.bigchain.me],
[([self.bigchain.me], 1)])
def validate_block(self, block):
if not self.bigchain.has_previous_vote(block['id'],
block['block']['voters']):
try:
block = Block.from_dict(block)
except (exceptions.InvalidHash, exceptions.InvalidSignature):
# XXX: if a block is invalid we should skip the `validate_tx`
# step, but since we are in a pipeline we cannot just jump to
# another function. Hackish solution: generate an invalid
# transaction and propagate it to the next steps of the
# pipeline.
return block['id'], [self.invalid_dummy_tx]
try:
self.consensus.validate_block(self.bigchain, block)
except (exceptions.InvalidHash,
exceptions.OperationError,
exceptions.InvalidSignature):
# XXX: if a block is invalid we should skip the `validate_tx`
# step, but since we are in a pipeline we cannot just jump to
# another function. Hackish solution: generate an invalid
# transaction and propagate it to the next steps of the
# pipeline.
return block.id, [self.invalid_dummy_tx]
return block.id, block.transactions
def ungroup(self, block_id, transactions):
"""Given a block, ungroup the transactions in it.
Args:
block_id (str): the id of the block in progress.
transactions (list(Transaction)): transactions of the block in
progress.
Returns:
``None`` if the block has been already voted, an iterator that
yields a transaction, block id, and the total number of
transactions contained in the block otherwise.
"""
num_tx = len(transactions)
for tx in transactions:
yield tx, block_id, num_tx
def validate_tx(self, tx, block_id, num_tx):
"""Validate a transaction.
Args:
tx (dict): the transaction to validate
block_id (str): the id of block containing the transaction
num_tx (int): the total number of transactions to process
Returns:
Three values are returned, the validity of the transaction,
``block_id``, ``num_tx``.
"""
return bool(self.bigchain.is_valid_transaction(tx)), block_id, num_tx
def vote(self, tx_validity, block_id, num_tx):
"""Collect the validity of transactions and cast a vote when ready.
Args:
tx_validity (bool): the validity of the transaction
block_id (str): the id of block containing the transaction
num_tx (int): the total number of transactions to process
Returns:
None, or a vote if a decision has been reached.
"""
self.counters[block_id] += 1
self.validity[block_id] = tx_validity and self.validity.get(block_id,
True)
if self.counters[block_id] == num_tx:
vote = self.bigchain.vote(block_id,
self.last_voted_id,
self.validity[block_id])
self.last_voted_id = block_id
del self.counters[block_id]
del self.validity[block_id]
return vote
def write_vote(self, vote):
"""Write vote to the database.
Args:
vote: the vote to write.
"""
self.bigchain.write_vote(vote)
return vote示例4: __init__
# 需要导入模块: from bigchaindb import Bigchain [as 别名]
# 或者: from bigchaindb.Bigchain import write_vote [as 别名]
#.........这里部分代码省略.........
except (exceptions.InvalidHash):
# XXX: if a block is invalid we should skip the `validate_tx`
# step, but since we are in a pipeline we cannot just jump to
# another function. Hackish solution: generate an invalid
# transaction and propagate it to the next steps of the
# pipeline.
return block_dict['id'], [self.invalid_dummy_tx]
try:
block._validate_block(self.bigchain)
except exceptions.ValidationError:
# XXX: if a block is invalid we should skip the `validate_tx`
# step, but since we are in a pipeline we cannot just jump to
# another function. Hackish solution: generate an invalid
# transaction and propagate it to the next steps of the
# pipeline.
return block.id, [self.invalid_dummy_tx]
return block.id, block_dict['block']['transactions']
def ungroup(self, block_id, transactions):
"""Given a block, ungroup the transactions in it.
Args:
block_id (str): the id of the block in progress.
transactions (list(dict)): transactions of the block in
progress.
Returns:
``None`` if the block has been already voted, an iterator that
yields a transaction, block id, and the total number of
transactions contained in the block otherwise.
"""
num_tx = len(transactions)
for tx in transactions:
yield tx, block_id, num_tx
def validate_tx(self, tx_dict, block_id, num_tx):
"""Validate a transaction. Transaction must also not be in any VALID
block.
Args:
tx_dict (dict): the transaction to validate
block_id (str): the id of block containing the transaction
num_tx (int): the total number of transactions to process
Returns:
Three values are returned, the validity of the transaction,
``block_id``, ``num_tx``.
"""
try:
tx = Transaction.from_dict(tx_dict)
new = self.bigchain.is_new_transaction(tx.id, exclude_block_id=block_id)
if not new:
raise exceptions.ValidationError('Tx already exists, %s', tx.id)
tx.validate(self.bigchain)
valid = True
except exceptions.ValidationError as e:
valid = False
logger.warning('Invalid tx: %s', e)
return valid, block_id, num_tx
def vote(self, tx_validity, block_id, num_tx):
"""Collect the validity of transactions and cast a vote when ready.
Args:
tx_validity (bool): the validity of the transaction
block_id (str): the id of block containing the transaction
num_tx (int): the total number of transactions to process
Returns:
None, or a vote if a decision has been reached.
"""
self.counters[block_id] += 1
self.blocks_validity_status[block_id] = tx_validity and self.blocks_validity_status.get(block_id,
True)
if self.counters[block_id] == num_tx:
vote = self.bigchain.vote(block_id,
self.last_voted_id,
self.blocks_validity_status[block_id])
self.last_voted_id = block_id
del self.counters[block_id]
del self.blocks_validity_status[block_id]
return vote, num_tx
def write_vote(self, vote, num_tx):
"""Write vote to the database.
Args:
vote: the vote to write.
"""
validity = 'valid' if vote['vote']['is_block_valid'] else 'invalid'
logger.info("Voting '%s' for block %s", validity,
vote['vote']['voting_for_block'])
self.bigchain.write_vote(vote)
self.bigchain.statsd.incr('pipelines.vote.throughput', num_tx)
return vote