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mitogen/econtext/tcp.py

43 lines
1.4 KiB
Python

"""
Functionality to allow a slave context to reconnect back to its master using a
plain TCP connection.
"""
import socket
import econtext.core
class Listener(econtext.core.BasicStream):
def __init__(self, broker, address=None, backlog=30):
self._broker = broker
self._sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
self._sock.bind(address or ('0.0.0.0', 0))
self._sock.listen(backlog)
econtext.core.set_cloexec(self._sock.fileno())
self.address = self._sock.getsockname()
self.receive_side = econtext.core.Side(self, self._sock.fileno())
broker.start_receive(self)
def on_receive(self, broker):
sock, addr = self._sock.accept()
context = Context(self._broker, name=addr)
stream = econtext.core.Stream(context)
stream.accept(sock.fileno(), sock.fileno())
def listen(broker, address=None, backlog=30):
"""Listen on `address` for connections from newly spawned contexts."""
return Listener(broker, address, backlog)
def connect(context):
"""Connect to a Broker at the address specified in our associated
Context."""
LOG.debug('%s.connect()', __name__)
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
self.receive_side = econtext.core.Side(self, sock.fileno())
self.transmit_side = econtext.core.Side(self, sock.fileno())
sock.connect(self._context.parent_addr)
self.enqueue(0, self._context.name)