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#
# sfive
#
# sfive - spreadspace streaming statistics suite is a generic
# statistic collection tool for streaming server infrastuctures.
# The system collects and stores meta data like number of views
# and throughput from a number of streaming servers and stores
# it in a global data store.
# The data acquisition is designed to be generic and extensible in
# order to support different streaming software.
# sfive also contains tools and applications to filter and visualize
# live and recorded data.
#
#
# Copyright (C) 2014-2015 Christian Pointner <equinox@spreadspace.org>
# Markus Grueneis <gimpf@gimpf.org>
#
# This file is part of sfive.
#
# sfive is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 3
# as published by the Free Software Foundation.
#
# sfive 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with sfive. If not, see <http://www.gnu.org/licenses/>.
#
import os
try:
import simplejson as json
except ImportError:
json = None
from flumotion.component.plugs import base
from flumotion.common import messages, i18n, log
from flumotion.common.poller import Poller
from errno import EINTR, EMSGSIZE, EAGAIN, EWOULDBLOCK, ECONNREFUSED, ENOBUFS
from twisted.internet import protocol, reactor, unix
from socket import error as socket_error
import datetime
import time
from flumotion.common.i18n import N_
T_ = i18n.gettexter()
_DEFAULT_POLL_INTERVAL = 15 # in seconds
_RECONNECT_TIMEOUT = 2 # in seconds
_MAX_PACKET_SIZE = 262144 # in bytes
__version__ = "$Rev$"
class SFivePort(unix.ConnectedDatagramPort):
def __init__(self, addr, proto, maxPacketSize=8192, mode=0666, bindAddress=None, reactor=None):
unix.ConnectedDatagramPort.__init__(self, addr, proto, maxPacketSize, mode, bindAddress, reactor)
def write(self, data):
try:
return self.socket.send(data)
except socket_error, se:
no = se.args[0]
if no == EINTR:
return self.write(data)
elif no == EMSGSIZE:
raise error.MessageLengthError, "message too long"
elif no == ECONNREFUSED:
self.protocol.connectionRefused()
elif no == EAGAIN:
# the send buffer seems to be full - let's wait a little while...
# this is not really a good solution but better than the aproach
# of twisted which just drops the datagram...
time.sleep(0.01)
return self.write(data)
else:
raise
class SFiveProto(protocol.ConnectedDatagramProtocol):
def __init__(self, plug):
self._plug = plug
def stopProtocol(self):
self._plug.debug('SFive: protocol stopped')
def startProtocol(self):
self._plug.debug('SFive: protocol started')
self._plug._socketReady()
def datagramReceived(self, data):
self._plug.debug('SFive: received datagram: "%s" (will get ignored)', data)
def connectionFailed(self, failure):
self._plug.warning('SFive: connection failed: %s', failure.getErrorMessage())
self._plug._socketError()
def sendDatagram(self, data):
try:
return self.transport.write(data)
except socket_error as err:
self._plug.warning('SFive: sending datagram failed: %s', err)
self._plug._socketError()
class ComponentSFivePlug(base.ComponentPlug):
"""Class to send statistics to the spreadspace streaming statistic suite"""
### ComponentPlug methods
def start(self, component):
self.debug('SFive: plug loaded')
self._sfivepoller = None
self._component = component
if not self._hasImport():
return
properties = self.args['properties']
self._socket = properties['socket']
self._hostname = properties['hostname']
self._content_id = properties.get('content')
self._format = properties.get('format')
self._quality = properties.get('quality')
tagstring = properties.get('tags', '')
self._tags = [x.strip() for x in tagstring.split(',')]
self._duration = properties.get('duration', _DEFAULT_POLL_INTERVAL)
self._sfivepoller = Poller(self._updateSFive, self._duration, start=False)
self._proto = None
self._conn = None
reactor.callLater(_RECONNECT_TIMEOUT, self._initSocket)
def _hasImport(self):
"""Check simplejson availability"""
if not json:
m = messages.Warning(T_(N_(
"Cannot import module '%s'.\n"), 'simplejson'),
mid='simplejson-import-error')
m.add(T_(N_(
"The SFive plug for this component is disabled.")))
self._component.addMessage(m)
return False
return True
def stop(self, component):
if self._sfivepoller:
self._sfivepoller.stop()
if self._conn:
self._conn.stopListening()
def _initSocket(self):
self.info('SFive: trying to (re)connect to %s...', self._socket)
self._proto = SFiveProto(self)
self._conn = SFivePort(self._socket, self._proto, _MAX_PACKET_SIZE, 0666, None, reactor)
self._conn.startListening()
def _socketError(self):
if self._sfivepoller:
self._sfivepoller.stop()
if self._conn:
self._conn.stopListening()
reactor.callLater(_RECONNECT_TIMEOUT, self._initSocket)
def _socketReady(self):
self.info('SFive: connection to sfive hub established')
# we are using datagram sockets for now -> must use stateless protocol
# self._sendInit()
if self._sfivepoller:
# try to be aligned with current time
# this will eventually get out of sync but for now this is good enough
offset = self._duration - (time.time() % self._duration)
self.info('SFive: %sZ -> will wait %0.2f seconds before starting poller (alignment)' % (datetime.datetime.utcnow().isoformat('T'), offset))
reactor.callLater(offset, self._startPoller)
def _startPoller(self):
self._old_bytes_received = self._component.getBytesReceived()
self._old_bytes_sent = self._component.getBytesSent()
self._start_time = datetime.datetime.utcnow().replace(microsecond=0)
self._sfivepoller.start()
self.info('SFive: poller started at %sZ' % (self._start_time.isoformat('T')))
def _updateSFive(self):
client_count = self._component.getClients()
bytes_received = self._component.getBytesReceived()
bytes_sent = self._component.getBytesSent()
bytes_received_diff = bytes_received - self._old_bytes_received
self._old_bytes_received = bytes_received
bytes_sent_diff = bytes_sent - self._old_bytes_sent
self._old_bytes_sent = bytes_sent
self.debug('SFive: updating %s/%s/%s: %d clients, %d/%d bytes sent/received' %
(self._content_id, self._format, self._quality, client_count, bytes_sent_diff, bytes_received_diff))
self._sendDatasetFull(self._start_time, self._duration, client_count, bytes_sent_diff, bytes_received_diff)
self._start_time = datetime.datetime.utcnow().replace(microsecond=0)
def _sendDatasetFull(self, timestamp, duration, client_count, bytes_sent, bytes_received):
data = { "version": 2, "hostname": self._hostname,
"stream": {
"content": self._content_id,
"format": self._format,
"quality": self._quality
},
"tags": self._tags,
"start-time": timestamp.isoformat('T') + 'Z',
"duration-ms": duration * 1000,
"data": {
"client-count": client_count,
"bytes-received": bytes_received,
"bytes-sent": bytes_sent
}
}
self._proto.sendDatagram('%s\n' % (json.dumps(data)))
def _sendInit(self):
initdata = { "version": 2, "hostname": self._hostname,
"stream": { "content": self._content_id, "format": self._format, "quality": self._quality },
"tags": self._tags }
self._proto.sendDatagram('%s\n' % (json.dumps(initdata)))
def _sendDataset(self, timestamp, duration, client_count, bytes_sent, bytes_received):
data = { "start-time": timestamp.isoformat('T') + 'Z',
"duration-ms": duration * 1000,
"data": {
"client-count": client_count,
"bytes-received": bytes_received,
"bytes-sent": bytes_sent
}
}
self._proto.sendDatagram('%s\n' % (json.dumps(data)))
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