/usr/share/proton-0.14.0/examples/python/reactor/echo.py is in libqpid-proton8-dev-examples 0.14.0-5.1ubuntu1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 | #!/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.
#
from __future__ import print_function
import sys, os
from proton.reactor import Reactor
class Echo:
def __init__(self, source):
self.source = source
def on_selectable_init(self, event):
sel = event.context # XXX: no selectable property yet
# We can configure a selectable with any file descriptor we want.
sel.fileno(self.source.fileno())
# Ask to be notified when the file is readable.
sel.reading = True
event.reactor.update(sel)
def on_selectable_readable(self, event):
sel = event.context
# The on_selectable_readable event tells us that there is data
# to be read, or the end of stream has been reached.
data = os.read(sel.fileno(), 1024)
if data:
print(data, end=' ')
else:
sel.terminate()
event.reactor.update(sel)
class Program:
def on_reactor_init(self, event):
# Every selectable is a possible source of future events. Our
# selectable stays alive until it reads the end of stream
# marker. This will keep the whole reactor running until we
# type Control-D.
print("Type whatever you want and then use Control-D to exit:")
event.reactor.selectable(Echo(sys.stdin))
r = Reactor(Program())
r.run()
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