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###############################################################################
#
# The MIT License (MIT)
#
# Copyright (c) Tavendo GmbH
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
###############################################################################
from os import environ
import math
try:
import asyncio
except ImportError:
# Trollius >= 0.3 was renamed
import trollius as asyncio
from autobahn import wamp
from autobahn.wamp.exception import ApplicationError
from autobahn.asyncio.wamp import ApplicationSession, ApplicationRunner
@wamp.error(u"com.myapp.error1")
class AppError1(Exception):
"""
An application specific exception that is decorated with a WAMP URI,
and hence can be automapped by Autobahn.
"""
class Component(ApplicationSession):
"""
Example WAMP application backend that raised exceptions.
"""
@asyncio.coroutine
def onJoin(self, details):
# raising standard exceptions
##
def sqrt(x):
if x == 0:
raise Exception("don't ask foolish questions;)")
else:
# this also will raise, if x < 0
return math.sqrt(x)
yield from self.register(sqrt, u'com.myapp.sqrt')
# raising WAMP application exceptions
##
def checkname(name):
if name in ['foo', 'bar']:
raise ApplicationError(u"com.myapp.error.reserved")
if name.lower() != name.upper():
# forward positional arguments in exceptions
raise ApplicationError(u"com.myapp.error.mixed_case", name.lower(), name.upper())
if len(name) < 3 or len(name) > 10:
# forward keyword arguments in exceptions
raise ApplicationError(u"com.myapp.error.invalid_length", min=3, max=10)
yield from self.register(checkname, u'com.myapp.checkname')
# defining and automapping WAMP application exceptions
##
self.define(AppError1)
def compare(a, b):
if a < b:
raise AppError1(b - a)
yield from self.register(compare, u'com.myapp.compare')
if __name__ == '__main__':
runner = ApplicationRunner(
environ.get("AUTOBAHN_DEMO_ROUTER", u"ws://127.0.0.1:8080/ws"),
u"crossbardemo",
)
runner.run(Component)
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