| #!/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 time |
| from proton.reactor import Reactor |
| |
| # Not every event goes to the reactor's event handler. If we have a |
| # separate handler for something like a scheduled task, then those |
| # events aren't logged by the logger associated with the reactor's |
| # handler. Sometimes this is useful if you don't want to see them, but |
| # sometimes you want the global picture. |
| |
| class Logger: |
| |
| def on_unhandled(self, name, event): |
| print("LOG:", name, event) |
| |
| class Task: |
| |
| def on_timer_task(self, event): |
| print("Mission accomplished!") |
| |
| class Program: |
| |
| def on_reactor_init(self, event): |
| print("Hello, World!") |
| event.reactor.schedule(0, Task()) |
| |
| def on_reactor_final(self, event): |
| print("Goodbye, World!") |
| |
| r = Reactor(Program()) |
| |
| # In addition to having a regular handler, the reactor also has a |
| # global handler that sees every event. By adding the Logger to the |
| # global handler instead of the regular handler, we can log every |
| # single event that occurs in the system regardless of whether or not |
| # there are specific handlers associated with the objects that are the |
| # target of those events. |
| r.global_handler.add(Logger()) |
| r.run() |