70 lines
1.8 KiB
Python
70 lines
1.8 KiB
Python
"""
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Support for working with multiple channels and gateways
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"""
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import py
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try:
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import queue
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except ImportError:
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import Queue as queue
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NO_ENDMARKER_WANTED = object()
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class MultiGateway:
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def __init__(self, gateways):
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self.gateways = gateways
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def remote_exec(self, source):
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channels = []
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for gw in self.gateways:
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channels.append(gw.remote_exec(source))
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return MultiChannel(channels)
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def exit(self):
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for gw in self.gateways:
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gw.exit()
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class MultiChannel:
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def __init__(self, channels):
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self._channels = channels
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def send_each(self, item):
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for ch in self._channels:
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ch.send(item)
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def receive_each(self, withchannel=False):
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assert not hasattr(self, '_queue')
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l = []
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for ch in self._channels:
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obj = ch.receive()
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if withchannel:
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l.append((ch, obj))
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else:
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l.append(obj)
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return l
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def make_receive_queue(self, endmarker=NO_ENDMARKER_WANTED):
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try:
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return self._queue
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except AttributeError:
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self._queue = queue.Queue()
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for ch in self._channels:
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def putreceived(obj, channel=ch):
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self._queue.put((channel, obj))
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if endmarker is NO_ENDMARKER_WANTED:
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ch.setcallback(putreceived)
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else:
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ch.setcallback(putreceived, endmarker=endmarker)
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return self._queue
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def waitclose(self):
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first = None
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for ch in self._channels:
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try:
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ch.waitclose()
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except ch.RemoteError:
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if first is None:
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first = py.std.sys.exc_info()
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if first:
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py.builtin._reraise(first[0], first[1], first[2])
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