| #!/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): |
| event.reactor.selectable(Echo(open(sys.argv[1]))) |
| |
| r = Reactor(Program()) |
| r.run() |