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#!/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
from proton import *
class CallbackAdapter:
def __init__(self, messenger):
self.messenger = messenger
self.messenger.blocking = False
self.messenger.outgoing_window = 1024
self.messenger.incoming_window = 1024
# for application use
self.message = Message()
self._incoming_message = Message()
self.tracked = {}
def run(self):
self.running = True
self.messenger.start()
self.on_start()
while self.running:
self.messenger.work()
self._process()
self.messenger.stop()
while not self.messenger.stopped:
self.messenger.work()
self._process()
self.on_stop()
def stop(self):
self.running = False
def _process(self):
self._process_outgoing()
self._process_incoming()
def _process_outgoing(self):
for t, on_status in list(self.tracked.items()):
status = self.messenger.status(t)
if status != PENDING:
on_status(status)
self.messenger.settle(t)
del self.tracked[t]
def _process_incoming(self):
while self.messenger.incoming:
t = self.messenger.get(self._incoming_message)
try:
self.on_recv(self._incoming_message)
self.messenger.accept(t)
except:
ex = sys.exc_info()[1]
print("Exception:", ex)
self.messenger.reject(t)
def send(self, message, on_status=None):
t = self.messenger.put(message)
if on_status:
self.tracked[t] = on_status
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