CC-2588: Use RabbitMQ to control the show recorder
- recording works now. - further testing is needed - still need to work on canceling the show
This commit is contained in:
james
parent
ccdb886b9a
commit
047a288c38
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@ -37,6 +37,8 @@ class RabbitMq
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$channel->basic_publish($msg, $EXCHANGE);
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$channel->close();
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$conn->close();
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self::SendMessageToShowRecorder("update_schedule");
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}
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}
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@ -63,5 +65,26 @@ class RabbitMq
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$channel->close();
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$conn->close();
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}
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public static function SendMessageToShowRecorder($event_type)
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{
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global $CC_CONFIG;
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$conn = new AMQPConnection($CC_CONFIG["rabbitmq"]["host"],
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$CC_CONFIG["rabbitmq"]["port"],
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$CC_CONFIG["rabbitmq"]["user"],
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$CC_CONFIG["rabbitmq"]["password"]);
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$channel = $conn->channel();
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$channel->access_request($CC_CONFIG["rabbitmq"]["vhost"], false, false, true, true);
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$EXCHANGE = 'airtime-show-recorder';
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$channel->exchange_declare($EXCHANGE, 'direct', false, true);
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$msg = new AMQPMessage($event_type, array('content_type' => 'text/plain'));
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$channel->basic_publish($msg, $EXCHANGE);
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$channel->close();
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$conn->close();
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}
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}
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@ -0,0 +1,144 @@
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#!/usr/local/bin/python
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import urllib
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import logging
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import logging.config
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import json
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import time
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import datetime
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import os
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import sys
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import shutil
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from configobj import ConfigObj
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from poster.encode import multipart_encode
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from poster.streaminghttp import register_openers
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import urllib2
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from subprocess import Popen
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from threading import Thread
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import mutagen
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from api_clients import api_client
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# For RabbitMQ - to be implemented in the future
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from kombu.connection import BrokerConnection
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from kombu.messaging import Exchange, Queue, Consumer, Producer
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# configure logging
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try:
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logging.config.fileConfig("logging.cfg")
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except Exception, e:
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print 'Error configuring logging: ', e
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sys.exit()
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POLL_INTERVAL=3600
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# loading config file
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try:
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config = ConfigObj('/etc/airtime/recorder.cfg')
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except Exception, e:
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logger = logging.getLogger('root')
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logger.error('Error loading config file: %s', e)
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sys.exit()
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def getDateTimeObj(time):
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timeinfo = time.split(" ")
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date = timeinfo[0].split("-")
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time = timeinfo[1].split(":")
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return datetime.datetime(int(date[0]), int(date[1]), int(date[2]), int(time[0]), int(time[1]), int(time[2]))
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class CommandHandler(Thread):
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def __init__(self, command, q):
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Thread.__init__(self)
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self.api_client = api_client.api_client_factory(config)
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self.logger = logging.getLogger('root')
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self.logger.info("Handling command: " + command)
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self.command = command
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self.queue = q
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def run(self):
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if(self.command == 'update_schedule'):
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self.queue.put(self.api_client.get_shows_to_record())
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class CommandListener(Thread):
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def __init__(self, q):
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Thread.__init__(self)
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self.api_client = api_client.api_client_factory(config)
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self.logger = logging.getLogger('root')
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self.sr = None
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self.queue = q
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self.shows_to_record = []
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self.logger.info("RecorderFetch: init complete")
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def init_rabbit_mq(self):
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self.logger.info("Initializing RabbitMQ stuff")
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try:
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schedule_exchange = Exchange("airtime-show-recorder", "direct", durable=True, auto_delete=True)
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schedule_queue = Queue("recorder-fetch", exchange=schedule_exchange, key="foo")
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self.connection = BrokerConnection(config["rabbitmq_host"], config["rabbitmq_user"], config["rabbitmq_password"], "/")
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channel = self.connection.channel()
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consumer = Consumer(channel, schedule_queue)
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consumer.register_callback(self.handle_message)
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consumer.consume()
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except Exception, e:
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self.logger.error(e)
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return False
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return True
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def handle_message(self, body, message):
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self.logger.info("Received command from RabbitMQ: " + message.body)
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ch = CommandHandler(message.body, self.queue)
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ch.start()
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# ACK the message to take it off the queue
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message.ack()
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"""def process_shows(self, shows):
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self.logger.info("Processing shows...")
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self.shows_to_record = []
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self.logger.info(shows)
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shows = shows[u'shows']
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for show in shows:
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show_starts = getDateTimeObj(show[u'starts'])
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show_end = getDateTimeObj(show[u'ends'])
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time_delta = show_end - show_starts
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self.shows_to_record[show[u'starts']] = [time_delta, show[u'instance_id'], show[u'name']]"""
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"""
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Main loop of the thread:
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Wait for schedule updates from RabbitMQ, but in case there arent any,
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poll the server to get the upcoming schedule.
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"""
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def run(self):
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self.logger.info("Started...")
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while not self.init_rabbit_mq():
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self.logger.error("Error connecting to RabbitMQ Server. Trying again in few seconds")
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time.sleep(5)
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# Bootstrap: since we are just starting up, we need to grab the
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# most recent schedule. After that we can just wait for updates.
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try:
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self.queue.put(self.api_client.get_shows_to_record())
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self.logger.info("Bootstrap complete: got initial copy of the schedule")
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except Exception, e:
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self.logger.error(e)
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loops = 1
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while True:
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self.logger.info("Loop #%s", loops)
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try:
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# Wait for messages from RabbitMQ. Timeout if we
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# dont get any after POLL_INTERVAL.
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self.connection.drain_events(timeout=POLL_INTERVAL)
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status = 1
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except Exception, e:
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self.logger.info(e)
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# We didnt get a message for a while, so poll the server
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# to get an updated schedule.
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self.queue.put(self.api_client.get_shows_to_record())
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loops += 1
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@ -8,3 +8,11 @@ base_recorded_files = '/var/tmp/airtime/show-recorder/'
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# where the logging files live
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log_dir = '/var/log/airtime/show-recorder'
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############################################
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# RabbitMQ settings #
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############################################
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rabbitmq_host = 'localhost'
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rabbitmq_user = 'guest'
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rabbitmq_password = 'guest'
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@ -8,6 +8,9 @@ import datetime
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import os
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import sys
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import shutil
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from Queue import Queue
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from commandlistener import CommandListener
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from configobj import ConfigObj
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@ -20,10 +23,6 @@ from threading import Thread
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import mutagen
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# For RabbitMQ - to be implemented in the future
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#from kombu.connection import BrokerConnection
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#from kombu.messaging import Exchange, Queue, Consumer, Producer
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from api_clients import api_client
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# configure logging
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@ -61,7 +60,7 @@ class ShowRecorder(Thread):
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self.show_name = show_name
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self.logger = logging.getLogger('root')
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self.p = None
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def record_show(self):
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length = str(self.filelength)+".0"
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filename = self.start_time
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@ -114,109 +113,119 @@ class ShowRecorder(Thread):
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datagen, headers = multipart_encode({"file": open(filepath, "rb"), 'name': filename, 'show_instance': self.show_instance})
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self.api_client.upload_recorded_show(datagen, headers)
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def set_metadata_and_save(self, filepath):
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try:
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date = self.start_time
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md = date.split(" ")
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time = md[1].replace(":", "-")
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self.logger.info("time: %s" % time)
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name = time+"-"+self.show_name
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name.encode('utf-8')
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artist = "AIRTIMERECORDERSOURCEFABRIC".encode('utf-8')
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#set some metadata for our file daemon
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recorded_file = mutagen.File(filepath, easy=True)
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recorded_file['title'] = name
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recorded_file['artist'] = artist
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recorded_file['date'] = md[0]
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recorded_file['tracknumber'] = self.show_instance
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recorded_file.save()
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except Exception, e:
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self.logger.error("Exception: %s", e)
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def run(self):
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code, filepath = self.record_show()
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if code == 0:
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self.logger.info("Preparing to upload %s" % filepath)
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try:
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date = self.start_time
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md = date.split(" ")
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time = md[1].replace(":", "-")
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self.logger.info("time: %s" % time)
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name = time+"-"+self.show_name
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name.encode('utf-8')
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artist = "AIRTIMERECORDERSOURCEFABRIC".encode('utf-8')
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#set some metadata for our file daemon
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recorded_file = mutagen.File(filepath, easy=True)
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recorded_file['title'] = name
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recorded_file['artist'] = artist
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recorded_file['date'] = md[0]
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recorded_file['tracknumber'] = self.show_instance
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recorded_file.save()
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except Exception, e:
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self.logger.error("Exception: %s", e)
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self.upload_file(filepath)
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self.logger.info("Preparing to upload %s" % filepath)
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self.set_metadata_and_save(filepath)
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self.upload_file(filepath)
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except Exceptio, e:
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self.logger.error(e)
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else:
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self.logger.info("problem recording show")
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class Record():
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def __init__(self):
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self.api_client = api_client.api_client_factory(config)
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class RecordScheduler(Thread):
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def __init__(self, q):
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Thread.__init__(self)
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self.queue = q
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self.shows_to_record = {}
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self.logger = logging.getLogger('root')
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self.sr = None
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def process_shows(self, shows):
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self.logger.info("Processing show schedules...")
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self.shows_to_record = {}
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for show in shows:
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temp = shows[u'shows']
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for show in temp:
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show_starts = getDateTimeObj(show[u'starts'])
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show_end = getDateTimeObj(show[u'ends'])
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time_delta = show_end - show_starts
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self.shows_to_record[show[u'starts']] = [time_delta, show[u'instance_id'], show[u'name']]
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self.logger.info(self.shows_to_record)
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def check_record(self):
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tnow = datetime.datetime.now()
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sorted_show_keys = sorted(self.shows_to_record.keys())
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start_time = sorted_show_keys[0]
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next_show = getDateTimeObj(start_time)
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self.logger.debug("Next show %s", next_show)
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self.logger.debug("Now %s", tnow)
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delta = next_show - tnow
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min_delta = datetime.timedelta(seconds=60)
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if delta <= min_delta:
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self.logger.debug("sleeping %s seconds until show", delta.seconds)
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time.sleep(delta.seconds)
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show_length = self.shows_to_record[start_time][0]
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show_instance = self.shows_to_record[start_time][1]
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show_name = self.shows_to_record[start_time][2]
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self.sr = ShowRecorder(show_instance, show_name, show_length.seconds, start_time, filetype="mp3")
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self.sr.start()
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#remove show from shows to record.
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del self.shows_to_record[start_time]
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def get_shows(self):
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response = self.api_client.get_shows_to_record()
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if response is not None and 'is_recording' in response:
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if self.sr is not None:
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if not response['is_recording'] and self.sr.is_recording():
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self.sr.cancel_recording()
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shows = response[u'shows']
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if len(shows):
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self.process_shows(shows)
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self.check_record()
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if len(self.shows_to_record) != 0:
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try:
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tnow = datetime.datetime.now()
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sorted_show_keys = sorted(self.shows_to_record.keys())
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start_time = sorted_show_keys[0]
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next_show = getDateTimeObj(start_time)
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self.logger.debug("Next show %s", next_show)
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self.logger.debug("Now %s", tnow)
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delta = next_show - tnow
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min_delta = datetime.timedelta(seconds=5)
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if delta <= min_delta:
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self.logger.debug("sleeping %s seconds until show", delta.seconds)
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time.sleep(delta.seconds)
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show_length = self.shows_to_record[start_time][0]
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show_instance = self.shows_to_record[start_time][1]
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show_name = self.shows_to_record[start_time][2]
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self.sr = ShowRecorder(show_instance, show_name, show_length.seconds, start_time, filetype="mp3")
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self.sr.start()
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#remove show from shows to record.
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del self.shows_to_record[start_time]
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except Exception,e :
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self.logger.error(e)
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else:
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self.logger.info("No recording schedule...")
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def run(self):
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self.logger.info("RecordScheduler started...")
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while True:
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if not self.queue.empty():
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try:
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self.logger.debug("Received data from command handler")
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shows = self.queue.get()
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self.logger.debug('shows %s' % shows)
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self.process_shows(shows)
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except Exception, e:
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self.logger.error(e)
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self.check_record()
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time.sleep(1)
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if __name__ == '__main__':
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recorder = Record()
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while True:
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recorder.get_shows()
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time.sleep(5)
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q = Queue()
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cl = CommandListener(q)
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cl.start()
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rs = RecordScheduler(q)
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rs.start()
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