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people_poker.py
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people_poker.py
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#!/usr/bin/env python2.7
import imp
import itertools
import logging
import os
import plac
import pkgutil
import sys
#import threading
# XXX For debugging
#from IPython.Shell import IPShellEmbed; ipshell = IPShellEmbed()
from collections import defaultdict
from configobj import ConfigObj
from datetime import datetime as dt
from pprint import pformat
from sqlalchemy import and_, func
from sqlalchemy.orm.exc import MultipleResultsFound, NoResultFound
from time import sleep
# XXX Is this a hack? If not, where's a better place for it?
sys.path.append(os.path.abspath('..'))
from spp.models import User, Status
from spp.provider import Provider
from spp.utilities import create_db_session
class PeoplePoker(object):
threads = []
def __init__(self, configuration=""):
super(PeoplePoker, self).__init__()
# TODO Push logging setup into a config file
self.logger = logging.getLogger()
self.logger.setLevel(logging.DEBUG)
formatter = logging.Formatter('%(asctime)s %(levelname)s %(message)s')
console_handler = logging.StreamHandler()
console_handler.setLevel(logging.DEBUG)
console_handler.setFormatter(formatter)
self.logger.addHandler(console_handler)
self.logger.info("Starting up at %s..." % dt.now())
# Get all of the provider classes and instantiate them
self.providers = self.get_providers()
self.provider_instances = self.get_provider_instances()
self.logger.info("Providers: " + pformat([(type, \
[provider.__name__ for provider in providers]) \
for type, providers in self.providers.iteritems()]))
self.logger.info("Instances: " + pformat([(type, \
[provider.__class__.__name__ for provider in providers]) \
for type, providers in self.provider_instances.iteritems()]))
parser = ConfigObj('config.ini')
# Initialize the database connection
self.session = create_db_session(parser["database%s" % configuration])
# Start any server providers (like the ZMQ server provider)
for provider in self.provider_instances['server']:
self.logger.info("Starting server for %s" % provider)
self.threads.append(provider)
for thread in self.threads:
thread.start()
def get_provider_instances(self):
"""
Instantiate collected providers, taking care to only instantiate each
provider class once.
"""
# Get a list of provider classes without duplicates
providers = list(set(itertools.chain(*self.providers.values())))
provider_instances = defaultdict(list)
for provider in providers:
instance = provider()
for type, classes in self.providers.iteritems():
for provider_class in classes:
if isinstance(instance, provider_class):
provider_instances[type].append(instance)
return provider_instances
def get_providers(self):
"""Collect all providers and classify them by what they provide."""
provider_path = [os.path.join(sys.path[0], 'providers')]
for loader, name, ispkg in pkgutil.iter_modules(provider_path):
file, pathname, desc = imp.find_module(name, provider_path)
imp.load_module(name, file, pathname, desc)
subclasses = Provider.__subclasses__()
providers = defaultdict(list)
for subclass in subclasses:
self.logger.info("Found provider %s providing %s" \
% (subclass.__name__, ', '.join(subclass.provides)))
for type in subclass.provides:
providers[type].append(subclass)
return providers
def update_status(self, user, provider, status_type, time):
if not isinstance(time, dt):
time = dt.strptime(time, '%Y-%m-%dT%H:%M:%S.%f')
self.logger.debug("Time: %s" % time)
try:
status = self.session.query(Status).filter(and_(
Status.user == user,
Status.provider == provider)).one()
status.status = status_type
status.update_time = time
self.session.merge(status)
self.session.commit()
except MultipleResultsFound:
self.logger.debug("Multiple results found for %s, %s" % (user,
provider))
raise
except NoResultFound:
self.logger.debug("Status missing for %s, %s in database, adding" \
% (user.display_name, provider))
status = Status(provider, status_type, time)
status.user = user
self.session.add(status)
self.session.commit()
def query_providers(self):
"""Query the various providers."""
# Poll data for all providers
for type in ['status', 'devices', 'users']:
for provider in self.provider_instances[type]:
self.logger.info("Polling provider %s" % provider)
# Call the polling function of the provider to
# refresh the data
try:
provider.poll()
except Exception as e:
self.logger.error("There was an error polling %s" \
% provider)
self.logger.exception(e)
# Update data from user providers
for provider in self.provider_instances['users']:
self.logger.debug("%s returned %d users" % (provider,
len(provider.users)))
for user in provider.users:
try:
db_user = self.session.query(User).filter(
User.guid == user.guid).one()
# TODO Can this be compacted?
db_user.account = user.account
db_user.display_name = user.display_name
db_user.first_name = user.first_name
db_user.last_name = user.last_name
db_user.department = user.department
db_user.email = user.email
db_user.provider = provider
db_user.last_modified = func.current_timestamp()
self.session.commit()
except MultipleResultsFound:
self.logger.debug("Multiple results found for %s" \
% user.guid)
raise
except NoResultFound:
self.logger.debug("User %s missing in database, adding" \
% user.guid)
self.session.add(user)
self.session.commit()
# Update data from status providers
for provider in self.provider_instances['status']:
while len(provider.updates):
update = provider.updates.popleft()
self.logger.info("Got update: %s" % update)
try:
user = self.session.query(User).filter(
User.account == update['account']).one()
except NoResultFound:
continue
self.update_status(user, update['provider'],
update['status'], update['time'])
# Update data from device providers
devices = defaultdict(list)
for provider in self.provider_instances['devices']:
for device in provider.devices:
devices[device].append(str(provider))
users = self.session.query(User)
self.logger.debug("sql-alchemy returned %d users" % users.count())
# Iterate through each user
for user in users:
# Iterate through all the user's devices and see
# if any of them are active
for device in user.devices:
self.logger.debug("User has device: %s" % device)
if device.mac_address in devices:
for provider in devices[device.mac_address]:
self.update_status(user, provider, 'in',
dt.now())
else:
for provider in devices[device.mac_address]:
self.update_status(user, provider, 'out',
dt.now())
def loop(self):
"""The main program loop."""
while True:
self.query_providers()
sleep(10)
@plac.annotations(
daemonize=("Daemonize the People Poker service", 'flag', 'd'),
configuration=("The configuration set to use", 'option', 'c'))
def main(daemonize=False, configuration=""):
if configuration:
configuration = "-%s" % configuration
pp = PeoplePoker(configuration)
try:
pp.loop()
finally:
for thread in pp.threads:
print "Attempting to stop thread %s" % thread
thread.stop()
if __name__ == "__main__":
plac.call(main)