| #!/usr/bin/python |
| # |
| # Licensed to the Apache Software Foundation (ASF) under one |
| # or more contributor license agreements. See the NOTICE file |
| # distributed with this work for additional information |
| # regarding copyright ownership. The ASF licenses this file |
| # to you under the Apache License, Version 2.0 (the |
| # "License"); you may not use this file except in compliance |
| # with the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, |
| # software distributed under the License is distributed on an |
| # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| # KIND, either express or implied. See the License for the |
| # specific language governing permissions and limitations |
| # under the License. |
| # |
| |
| import tornado.ioloop |
| from proton.reactor import Reactor |
| from proton.handlers import IOHandler |
| |
| class TornadoApp: |
| |
| def __init__(self, *args): |
| self.reactor = Reactor(*args) |
| self.reactor.global_handler = self |
| self.io = IOHandler() |
| self.loop = tornado.ioloop.IOLoop.instance() |
| self.count = 0 |
| self.reactor.start() |
| self.reactor.process() |
| |
| def on_reactor_quiesced(self, event): |
| event.reactor.yield_() |
| |
| def on_unhandled(self, name, event): |
| event.dispatch(self.io) |
| |
| def _events(self, sel): |
| events = self.loop.ERROR |
| if sel.reading: |
| events |= self.loop.READ |
| if sel.writing: |
| events |= self.loop.WRITE |
| return events |
| |
| def _schedule(self, sel): |
| if sel.deadline: |
| self.loop.add_timeout(sel.deadline, lambda: self.expired(sel)) |
| |
| def _expired(self, sel): |
| sel.expired() |
| |
| def _process(self): |
| self.reactor.process() |
| if not self.reactor.quiesced: |
| self.loop.add_callback(self._process) |
| |
| def _callback(self, sel, events): |
| if self.loop.READ & events: |
| sel.readable() |
| if self.loop.WRITE & events: |
| sel.writable() |
| self._process() |
| |
| def on_selectable_init(self, event): |
| sel = event.context |
| if sel.fileno() >= 0: |
| self.loop.add_handler(sel.fileno(), lambda fd, events: self._callback(sel, events), self._events(sel)) |
| self._schedule(sel) |
| self.count += 1 |
| |
| def on_selectable_updated(self, event): |
| sel = event.context |
| if sel.fileno() > 0: |
| self.loop.update_handler(sel.fileno(), self._events(sel)) |
| self._schedule(sel) |
| |
| def on_selectable_final(self, event): |
| sel = event.context |
| if sel.fileno() > 0: |
| self.loop.remove_handler(sel.fileno()) |
| sel.release() |
| self.count -= 1 |
| if self.count == 0: |
| self.loop.add_callback(self._stop) |
| |
| def _stop(self): |
| self.reactor.stop() |
| self.loop.stop() |
