mirror of
https://github.com/bigchaindb/bigchaindb.git
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0f13da59bf
* naive revert * skip voting if already voted * typo * poison pill * tests * reversions * block reverter is separate process * factor out previous vote checking * add tests
118 lines
3.9 KiB
Python
118 lines
3.9 KiB
Python
import logging
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import multiprocessing as mp
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import rethinkdb as r
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import bigchaindb
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from bigchaindb import Bigchain
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from bigchaindb.voter import Voter, Election
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from bigchaindb.block import Block, BlockDeleteRevert
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from bigchaindb.web import server
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logger = logging.getLogger(__name__)
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BANNER = """
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****************************************************************************
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* *
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* Initialization complete. BigchainDB is ready and waiting for events. *
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* You can send events through the API documented at: *
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* - http://docs.bigchaindb.apiary.io/ *
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* *
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* Listening to client connections on: {:<15} *
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* *
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****************************************************************************
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"""
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class Processes(object):
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def __init__(self):
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# initialize the class
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self.q_new_block = mp.Queue()
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self.q_new_transaction = mp.Queue()
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self.q_block_new_vote = mp.Queue()
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self.q_revert_delete = mp.Queue()
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def map_backlog(self):
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# listen to changes on the backlog and redirect the changes
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# to the correct queues
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# create a bigchain instance
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b = Bigchain()
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for change in r.table('backlog').changes().run(b.conn):
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# insert
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if change['old_val'] is None:
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self.q_new_transaction.put(change['new_val'])
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# delete
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if change['new_val'] is None:
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pass
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# update
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if change['new_val'] is not None and change['old_val'] is not None:
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pass
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def map_bigchain(self):
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# listen to changes on the bigchain and redirect the changes
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# to the correct queues
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# create a bigchain instance
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b = Bigchain()
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for change in r.table('bigchain').changes().run(b.conn):
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# insert
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if change['old_val'] is None:
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self.q_new_block.put(change['new_val'])
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# delete
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elif change['new_val'] is None:
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# this should never happen in regular operation
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self.q_revert_delete.put(change['old_val'])
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# update (new vote)
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elif change['new_val'] is not None and change['old_val'] is not None:
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self.q_block_new_vote.put(change['new_val'])
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def start(self):
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logger.info('Initializing BigchainDB...')
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# instantiate block and voter
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block = Block(self.q_new_transaction)
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delete_reverter = BlockDeleteRevert(self.q_revert_delete)
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# start the web api
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app_server = server.create_server(bigchaindb.config['server'])
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p_webapi = mp.Process(name='webapi', target=app_server.run)
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p_webapi.start()
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# initialize the processes
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p_map_bigchain = mp.Process(name='bigchain_mapper', target=self.map_bigchain)
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p_map_backlog = mp.Process(name='backlog_mapper', target=self.map_backlog)
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p_block = mp.Process(name='block', target=block.start)
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p_block_delete_revert = mp.Process(name='block_delete_revert', target=delete_reverter.start)
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p_voter = Voter(self.q_new_block)
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p_election = Election(self.q_block_new_vote)
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# start the processes
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logger.info('starting bigchain mapper')
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p_map_bigchain.start()
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logger.info('starting backlog mapper')
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p_map_backlog.start()
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logger.info('starting block')
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p_block.start()
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p_block_delete_revert.start()
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logger.info('starting voter')
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p_voter.start()
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logger.info('starting election')
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p_election.start()
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# start message
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block.initialized.wait()
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p_voter.initialized.wait()
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logger.info(BANNER.format(bigchaindb.config['server']['bind']))
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