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fawce
107 lines
3.7 KiB
Python
107 lines
3.7 KiB
Python
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from data.sources.equity import *
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from backtest.util import *
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import time
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import logging
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class DataFeed(object):
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def __init__(self, db, subscriber_count):
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self.logger = logging.getLogger()
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self.data_address = "tcp://127.0.0.1:{port}".format(port=10101)
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self.sync_address = "tcp://127.0.0.1:{port}".format(port=10102)
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self.feed_address = "tcp://127.0.0.1:{port}".format(port=10103)
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self.db = db
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self.data_workers = {}
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emt1 = EquityMinuteTrades(133, self.db, self.data_address, self.sync_address, 1)
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self.data_workers[1] = emt1
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emt2 = EquityMinuteTrades(134, self.db, self.data_address, self.sync_address, 2)
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self.data_workers[2] = emt2
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self.data_buffer = ParallelBuffer(self.data_workers.keys())
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self.sync_count = subscriber_count + len(self.data_workers)
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def start_data_workers(self):
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"""Start a sub-process for each datasource."""
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for source_id, source in self.data_workers.iteritems():
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self.logger.info("starting {id}".format(id=source_id))
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source.start()
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self.logger.info("ds processes launched")
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def sync_clients(self):
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# Socket to receive signals
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self.logger.info("waiting for all datasources and clients to be ready")
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self.syncservice = self.context.socket(zmq.REP)
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self.syncservice.bind(self.sync_address)
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subscribers = 1
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while subscribers <= self.sync_count:
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self.logger.info("sync'ing {count} of {total}".format(count=subscribers, total=self.sync_count))
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# wait for synchronization request
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msg = self.syncservice.recv()
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# send synchronization reply
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self.syncservice.send('')
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subscribers += 1
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self.syncservice.close()
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self.logger.info("sync'd all datasources and clients")
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def run(self):
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# Prepare our context and sockets
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self.context = zmq.Context()
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ds_finished_counter = 0
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#create the data sink. Based on http://zguide.zeromq.org/py:tasksink2
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#see: http://zguide.zeromq.org/py:taskwork2
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self.data_socket = self.context.socket(zmq.PULL)
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self.data_socket.bind(self.data_address)
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#create the feed
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self.feed_socket = self.context.socket(zmq.PUSH)
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self.feed_socket.bind(self.feed_address)
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self.data_buffer.out_socket = self.feed_socket
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#start the data source workers
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self.start_data_workers()
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#wait for all feed subscribers
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self.sync_clients()
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self.logger.info("entering feed loop on {addr}".format(addr=self.data_address))
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while True:
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message = self.data_socket.recv()
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event = json.loads(message)
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if(event["type"] == "DONE"):
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ds_finished_counter += 1
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if(len(self.data_workers) == ds_finished_counter):
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break
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else:
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self.data_buffer.append(event[u's'], event)
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self.data_buffer.send_next()
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#drain any remaining messages in the buffer
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self.data_buffer.drain()
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#send the DONE message
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self.feed_socket.send("DONE")
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self.logger.info("received {n} messages, sent {m} messages".format(n=self.data_buffer.received_count, m=self.data_buffer.sent_count))
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self.data_socket.close()
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self.feed_socket.close()
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self.context.term()
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