BATCAVE/batcave.py

#!/usr/bin/python
# -*- coding: utf-8 -*-

from __future__ import print_function
import argparse
import daemon
import logging
import sys
import time
import threading

from ffstatus import \
    dict_merge, merge_alfred_batman, \
    ApiServer, \
    AlfredParser, BatmanParser, \
    DashingClient, GraphitePush, \
    Storage
from ffstatus.exceptions import SanityCheckError

DEFAULT_INTERVAL = 15

parser = argparse.ArgumentParser(description='Batman/Alfred Transmission Collection, Aggregation & Value Engine')
parser.add_argument('--logfile', help='path for log file')
parser.add_argument('--interval', type=int, default=DEFAULT_INTERVAL, help='data poll interval')
parser.add_argument('-v', '--verbose', action='store_true', help='increase output verbosity')
parser.add_argument('-d', '--no-detach', action='store_true', help='Don\'t detach (daemonize) ourself')
parser.add_argument('-n', '--no-send', action='store_true', help='Fetch data but don\'t send it')
parser.add_argument('-A', '--alfred-json', help='executable path for alfred-json')
parser.add_argument('-B', '--batadv-vis', help='executable path for batadv-vis')
parser.add_argument('-G', '--graphite-host', help='Graphite host')
parser.add_argument('--graphite-port', type=int, default=2003, help='Graphite port')
parser.add_argument('--dashing-url', help='Dashing URL')
parser.add_argument('--dashing-token', help='Dashing\'s secret update token')
parser.add_argument('--api-bind-host', default='', help='API-Server Hostname')
parser.add_argument('--api-bind-port', type=int, default=8888, help='API-Server Port')
parser.add_argument('-S', '--storage-dir', default='.', help='Path where to store data')
args = parser.parse_args()

if args.interval < 5:
    print('A poll interval lower than 5s is not supported.')
    sys.exit(1)

shall_daemonize = not args.no_detach

logger = logging.getLogger()
logger.setLevel(logging.DEBUG if args.verbose else logging.INFO)

if not args.logfile is None:
    fh = logging.FileHandler(args.logfile)
    fh.setFormatter(logging.Formatter('%(asctime)s [%(levelname)s] %(message)s', '%Y-%m-%d %H:%M:%S'))
    logger.addHandler(fh)

if args.no_detach:
    ch = logging.StreamHandler(sys.stdout)
    ch.setFormatter(logging.Formatter('%(asctime)s [%(levelname)s] %(message)s', '%Y-%m-%d %H:%M:%S'))
    logger.addHandler(ch)

logger.info('Starting up')

storage = Storage(args.storage_dir)
storage.open()
logger.info('Storage: ' + str(storage))

a = AlfredParser()
b = BatmanParser()
d = DashingClient(args.dashing_url, args.dashing_token) if not args.dashing_url is None else None
g = GraphitePush(args.graphite_host, args.graphite_port) if not args.graphite_host is None else None

if args.no_send:
    if not g is None: g.dont_send = True

if not args.alfred_json is None: a.alfred_json = args.alfred_json
if not args.batadv_vis is None: b.batadv_vis = args.batadv_vis

logger.debug('Configured A.L.F.R.E.D. source: ' + str(a))
logger.debug('Configured B.A.T.M.A.N. source: ' + str(b))
logger.debug('Configured Dashing: ' + str(d))
logger.debug('Configured Graphite: ' + str(g))

# execute sanitycheck() where possible
for i in [('AlfredParser', a), ('BatmanParser', b)]:
    try:
        i[1].sanitycheck()
    except SanityCheckError as err:
        logger.critical(i[0] + '.sanitycheck() failed: ' + str(err))
        print('FAILED SANITY CHECK: ' + str(err))
        sys.exit(1)

server = ApiServer((args.api_bind_host, args.api_bind_port), storage)
server_thread = threading.Thread(target=server.serve_forever)
server_thread.daemon = True # exit thread when main thread terminates
server_thread.start()
logger.info('Started server: ' + str(server))

if shall_daemonize:
    daemon_context = daemon.DaemonContext(
        files_preserve=[fh.stream],
    )

    daemon_context.open()

while True:
    try:
        ts = int(time.time())
        logger.debug('Step 1/3: Fetching data ...')
        alfreddata = a.fetch()
        batmandata = b.fetch()
        newdata = merge_alfred_batman(alfreddata, batmandata)
        logger.debug('Fetched data: {0} ALFRED with {1} BATMAN makes {2} total'.format(len(alfreddata), len(batmandata), len(newdata)))

        logger.debug('Step 2/3: Pushing update data ...')
        if not g is None:
            graphitedata = g.push(newdata, ts=ts)
            logger.info('Sent ' + str(graphitedata.count('\n')+1) + ' lines to Graphite.')
        if not d is None:
            d.push(newdata)

        logger.debug('Step 3/3: Merging current data ...')
        storage.merge_new_data(newdata)

        logger.debug('I have data for %d nodes.', len(storage.data))

    except Exception as err:
        logger.error(str(err))

    logger.debug('Sleeping for {0} seconds'.format(args.interval))
    time.sleep(args.interval)

storage.close()
logger.info('Shut down.')