07-invoke-async.py

#!/usr/bin/env python3

# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public License
# as published by the Free Software Foundation; either version 2.1
# of the License, or (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Lesser General Public License for more details.

import sys
import pyquid
import time


success = False


def on_invocation_done(value, user_data):
    global success
    global my_user_data
    assert value == 'hello world and count is 0'
    assert user_data == my_user_data
    success = True


# create a switcher.
sw = pyquid.Switcher('pyquid', debug=True)

# creating a quiddity method-quid in order to illustrate method invocation
methodquid = sw.create('method-quid')

# some Quiddities has methods that can be invoked
assert 'hello world and count is 0' == methodquid.invoke('hello', ['world'])

# asynchronous invocation invoke_async
my_user_data = ["my", "user", "data"]
methodquid.invoke_async('hello', ['world'], on_invocation_done, my_user_data)

# wait 200 milliseconds
time.sleep(0.2)

# check error
try:
    methodquid.invoke("nonexistent method")
except RuntimeError:
    pass

try:
    methodquid.invoke_async("nonexistent method", ['world'], on_invocation_done, my_user_data)
except RuntimeError:
    pass


if success == True:
    exit(0)
# fail if invocation done has not been notified
exit(1)