120 lines
3.3 KiB
Python
120 lines
3.3 KiB
Python
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# Copyright (C) 2010 Aldo Cortesi
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import sys
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import Queue, threading
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#begin nocover
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class Msg:
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def __init__(self):
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self.q = Queue.Queue()
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self.acked = False
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def ack(self, data=None):
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self.acked = True
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self.q.put(data or self)
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def send(self, masterq):
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self.acked = False
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masterq.put(self)
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return self.q.get()
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class Slave(threading.Thread):
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def __init__(self, masterq, server):
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self.masterq, self.server = masterq, server
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self.server.set_mqueue(masterq)
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threading.Thread.__init__(self)
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def run(self):
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self.server.serve_forever()
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class Master:
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def __init__(self, server):
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self.server = server
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self._shutdown = False
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self.masterq = None
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def tick(self, q):
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try:
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# Small timeout to prevent pegging the CPU
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msg = q.get(timeout=0.01)
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self.handle(msg)
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except Queue.Empty:
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pass
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def run(self):
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q = Queue.Queue()
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self.masterq = q
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slave = Slave(q, self.server)
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slave.start()
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while not self._shutdown:
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self.tick(q)
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self.shutdown()
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def handle(self, msg):
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c = "handle_" + msg.__class__.__name__.lower()
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m = getattr(self, c, None)
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if m:
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m(msg)
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else:
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msg.ack()
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def shutdown(self):
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if not self._shutdown:
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self._shutdown = True
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self.server.shutdown()
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class DumpMaster(Master):
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"""
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A simple master that just dumps to screen.
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"""
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def __init__(self, server, verbosity):
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self.verbosity = verbosity
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Master.__init__(self, server)
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def run(self):
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try:
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return Master.run(self)
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except KeyboardInterrupt:
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self.shutdown()
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def handle_response(self, msg):
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if 0 < self.verbosity < 3:
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print >> sys.stderr, ">>",
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print >> sys.stderr, msg.request.short()
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if self.verbosity == 1:
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print >> sys.stderr, "<<",
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print >> sys.stderr, msg.short()
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elif self.verbosity == 2:
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print >> sys.stderr, "<<"
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for i in msg.assemble().splitlines():
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print >> sys.stderr, "\t", i
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print >> sys.stderr, "<<"
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elif self.verbosity == 3:
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print >> sys.stderr, ">>"
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for i in msg.request.assemble().splitlines():
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print >> sys.stderr, "\t", i
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print >> sys.stderr, ">>"
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print >> sys.stderr, "<<"
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for i in msg.assemble().splitlines():
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print >> sys.stderr, "\t", i
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print >> sys.stderr, "<<"
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msg.ack()
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