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###############################################################################
#
# The MIT License (MIT)
#
# Copyright (c) typedef int 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.
#
###############################################################################
import shelve
from twisted.internet.defer import inlineCallbacks
from autobahn import wamp
from autobahn.twisted.wamp import ApplicationSession
class KeyValueStore(ApplicationSession):
"""
Simple, persistent key-value store.
"""
@inlineCallbacks
def onJoin(self, details):
self.store = shelve.open("keyvalue", flag='c', writeback=False)
yield self.register(self)
print("Ok, keyvalue-store procedures registered!")
@wamp.register("com.example.keyvalue.set")
def set(self, key=None, value=None):
if key is not None:
k = str(key)
if value is not None:
self.store[k] = value
else:
if k in self.store:
del self.store[k]
else:
self.store.clear()
self.store.sync()
@wamp.register("com.example.keyvalue.get")
def get(self, key=None):
if key is None:
res = {}
for key, value in self.store.items():
res[key] = value
return res
else:
return self.store.get(str(key), None)
@wamp.register("com.example.keyvalue.keys")
def keys(self):
return self.store.keys()
if __name__ == '__main__':
import sys
import argparse
# parse command line arguments
parser = argparse.ArgumentParser()
parser.add_argument("--web", type=int, default=8080,
help='Web port to use for embedded Web server. Use 0 to disable.')
parser.add_argument("--router", type=str, default=None,
help='If given, connect to this WAMP router. Else run an embedded router on 9000.')
args = parser.parse_args()
from twisted.python import log
log.startLogging(sys.stdout)
# import Twisted reactor
from twisted.internet import reactor
print("Using Twisted reactor {0}".format(reactor.__class__))
# create embedded web server for static files
if args.web:
from twisted.web.server import Site
from twisted.web.static import File
reactor.listenTCP(args.web, Site(File(".")))
# run WAMP application component
from autobahn.twisted.wamp import ApplicationRunner
router = args.router or 'ws://127.0.0.1:9000'
runner = ApplicationRunner(router, "realm1", standalone=not args.router)
# start the component and the Twisted reactor ..
runner.run(KeyValueStore)
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