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