201 lines
7.9 KiB
Python
201 lines
7.9 KiB
Python
# -*- coding: utf-8 -*-
|
|
import threading
|
|
import time
|
|
import copy
|
|
import traceback
|
|
from itertools import ifilter
|
|
|
|
from media.monitor.handler import ReportHandler
|
|
from media.monitor.log import Loggable
|
|
from media.monitor.exceptions import BadSongFile
|
|
from media.monitor.pure import LazyProperty
|
|
from media.monitor.eventcontractor import EventContractor
|
|
|
|
import api_clients.api_client as ac
|
|
|
|
class RequestSync(threading.Thread,Loggable):
|
|
def __init__(self, watcher, requests):
|
|
threading.Thread.__init__(self)
|
|
self.watcher = watcher
|
|
self.requests = requests
|
|
self.retries = 1
|
|
self.request_wait = 0.3
|
|
|
|
@LazyProperty
|
|
def apiclient(self):
|
|
return ac.AirtimeApiClient.create_right_config()
|
|
|
|
def run(self):
|
|
self.logger.info("Attempting request with %d items." %
|
|
len(self.requests))
|
|
# Note that we must attach the appropriate mode to every
|
|
# response. Also Not forget to attach the 'is_record' to any
|
|
# requests that are related to recorded shows
|
|
# TODO : recorded shows aren't flagged right
|
|
# Is this retry shit even necessary? Consider getting rid of this.
|
|
packed_requests = []
|
|
for request_event in ifilter(lambda x: not x.morph_target(),
|
|
self.requests):
|
|
try:
|
|
for request in request_event.safe_pack():
|
|
if isinstance(request, BadSongFile):
|
|
self.logger.info("Bad song file: '%s'" % request.path)
|
|
else: packed_requests.append(request)
|
|
except BadSongFile as e:
|
|
self.logger.info("This should never occur anymore!!!")
|
|
self.logger.info("Bad song file: '%s'" % e.path)
|
|
except Exception as e:
|
|
self.logger.info("An evil exception occured")
|
|
self.logger.error( traceback.format_exc() )
|
|
def make_req():
|
|
self.apiclient.send_media_monitor_requests( packed_requests )
|
|
for try_index in range(0,self.retries):
|
|
try: make_req()
|
|
# most likely we did not get json response as we expected
|
|
except ValueError:
|
|
self.logger.info("ApiController.php probably crashed, we \
|
|
diagnose this from the fact that it did not return \
|
|
valid json")
|
|
self.logger.info("Trying again after %f seconds" %
|
|
self.request_wait)
|
|
time.sleep( self.request_wait )
|
|
except Exception as e: self.unexpected_exception(e)
|
|
else:
|
|
self.logger.info("Request worked on the '%d' try" %
|
|
(try_index + 1))
|
|
break
|
|
else: self.logger.info("Failed to send request after '%d' tries..." %
|
|
self.retries)
|
|
self.watcher.flag_done()
|
|
|
|
class TimeoutWatcher(threading.Thread,Loggable):
|
|
def __init__(self, watcher, timeout=5):
|
|
self.logger.info("Created timeout thread...")
|
|
threading.Thread.__init__(self)
|
|
self.watcher = watcher
|
|
self.timeout = timeout
|
|
|
|
def run(self):
|
|
# We try to launch a new thread every self.timeout seconds
|
|
# so that the people do not have to wait for the queue to fill up
|
|
while True:
|
|
time.sleep(self.timeout)
|
|
# If there is any requests left we launch em. Note that this
|
|
# isn't strictly necessary since RequestSync threads already
|
|
# chain themselves
|
|
if self.watcher.requests_in_queue():
|
|
self.logger.info("We got %d requests waiting to be launched" %
|
|
self.watcher.requests_left_count())
|
|
self.watcher.request_do()
|
|
# Same for events, this behaviour is mandatory however.
|
|
if self.watcher.events_in_queue():
|
|
self.logger.info("We got %d events that are unflushed" %
|
|
self.watcher.events_left_count())
|
|
self.watcher.flush_events()
|
|
|
|
class WatchSyncer(ReportHandler,Loggable):
|
|
def __init__(self, signal, chunking_number = 100, timeout=15):
|
|
#self.signal = signal
|
|
self.timeout = float(timeout)
|
|
self.chunking_number = int(chunking_number)
|
|
self.__reset_queue()
|
|
# Even though we are not blocking on the http requests, we are still
|
|
# trying to send the http requests in order
|
|
self.__requests = []
|
|
self.request_running = False
|
|
# we don't actually use this "private" instance variable anywhere
|
|
self.__current_thread = None
|
|
self.contractor = EventContractor()
|
|
tc = TimeoutWatcher(self, self.timeout)
|
|
tc.daemon = True
|
|
tc.start()
|
|
super(WatchSyncer, self).__init__(signal=signal)
|
|
|
|
def handle(self, sender, event):
|
|
"""
|
|
We implement this abstract method from ReportHandler
|
|
"""
|
|
if hasattr(event, 'pack'):
|
|
# We push this event into queue
|
|
self.logger.info("Received event '%s'. Path: '%s'" % \
|
|
( event.__class__.__name__,
|
|
getattr(event,'path','No path exists') ))
|
|
try:
|
|
# If there is a strange bug anywhere in the code the next line
|
|
# should be a suspect
|
|
self.contractor.register( event )
|
|
self.push_queue( event )
|
|
except BadSongFile as e:
|
|
self.fatal_exception("Received bas song file '%s'" % e.path, e)
|
|
except Exception as e:
|
|
self.unexpected_exception(e)
|
|
else:
|
|
self.logger.info("Received event that does not implement packing.\
|
|
Printing its representation:")
|
|
self.logger.info( repr(event) )
|
|
|
|
def requests_left_count(self): return len(self.__requests)
|
|
def events_left_count(self): return len(self.__queue)
|
|
|
|
def push_queue(self, elem):
|
|
self.logger.info("Added event into queue")
|
|
if self.events_left_count() >= self.chunking_number:
|
|
self.push_request()
|
|
self.request_do() # Launch the request if nothing is running
|
|
self.__queue.append(elem)
|
|
|
|
def flush_events(self):
|
|
self.logger.info("Force flushing events...")
|
|
self.push_request()
|
|
self.request_do()
|
|
|
|
def events_in_queue(self):
|
|
"""
|
|
returns true if there are events in the queue that haven't been
|
|
processed yet
|
|
"""
|
|
return len(self.__queue) > 0
|
|
|
|
def requests_in_queue(self):
|
|
return len(self.__requests) > 0
|
|
|
|
def flag_done(self):
|
|
"""
|
|
called by request thread when it finishes operating
|
|
"""
|
|
self.request_running = False
|
|
self.__current_thread = None
|
|
# This call might not be necessary but we would like
|
|
# to get the ball running with the requests as soon as possible
|
|
if self.requests_in_queue() > 0: self.request_do()
|
|
|
|
def request_do(self):
|
|
"""
|
|
launches a request thread only if one is not running right now
|
|
"""
|
|
if not self.request_running:
|
|
self.request_running = True
|
|
self.__requests.pop()()
|
|
|
|
def push_request(self):
|
|
self.logger.info("WatchSyncer : Unleashing request")
|
|
# want to do request asyncly and empty the queue
|
|
requests = copy.copy(self.__queue)
|
|
def launch_request():
|
|
# Need shallow copy here
|
|
t = RequestSync(watcher=self, requests=requests)
|
|
t.start()
|
|
self.__current_thread = t
|
|
self.__requests.append(launch_request)
|
|
self.__reset_queue()
|
|
|
|
def __reset_queue(self): self.__queue = []
|
|
|
|
def __del__(self):
|
|
# Ideally we would like to do a little more to ensure safe shutdown
|
|
if self.events_in_queue():
|
|
self.logger.warn("Terminating with events still in the queue...")
|
|
if self.requests_in_queue():
|
|
self.logger.warn("Terminating with http requests still pending...")
|
|
|