import collectd
import json, math
from contextlib import closing
from urllib2 import urlopen, URLError
import urlparse
import time
def handle_config(root):
for child in root.children:
instance_name = None
if child.key == 'Instance':
instance_name = child.values[0]
url = None
for ch2 in child.children:
if ch2.key == 'URL':
url = ch2.values[0]
if not url:
collectd.warning('No URL found in dump1090 Instance ' + instance_name)
else:
collectd.register_read(callback=handle_read,
data=(instance_name, urlparse.urlparse(url).hostname, url),
name='dump1090.' + instance_name)
collectd.register_read(callback=handle_read_1min,
data=(instance_name, urlparse.urlparse(url).hostname, url),
name='dump1090.' + instance_name + '.1min',
interval=60)
else:
collectd.warning('Ignored config entry: ' + child.key)
V=collectd.Values(host='', plugin='dump1090', time=0)
def T(provisional):
now = time.time()
if provisional <= now + 60: return provisional
else: return now
def handle_read(data):
instance_name,host,url = data
read_stats(instance_name, host, url)
read_aircraft(instance_name, host, url)
def handle_read_1min(data):
instance_name,host,url = data
read_stats_1min(instance_name, host, url);
def read_stats_1min(instance_name, host, url):
try:
with closing(urlopen(url + '/data/stats.json', None, 5.0)) as stats_file:
stats = json.load(stats_file)
except URLError:
return
# Signal measurements - from the 1 min bucket
if stats['last1min'].has_key('local'):
if stats['last1min']['local'].has_key('signal'):
V.dispatch(plugin_instance = instance_name,
host=host,
type='dump1090_dbfs',
type_instance='signal',
time=T(stats['last1min']['end']),
values = [stats['last1min']['local']['signal']],
interval = 60)
if stats['last1min']['local'].has_key('peak_signal'):
V.dispatch(plugin_instance = instance_name,
host=host,
type='dump1090_dbfs',
type_instance='peak_signal',
time=T(stats['last1min']['end']),
values = [stats['last1min']['local']['peak_signal']],
interval = 60)
if stats['last1min']['local'].has_key('min_signal'):
V.dispatch(plugin_instance = instance_name,
host=host,
type='dump1090_dbfs',
type_instance='min_signal',
time=T(stats['last1min']['end']),
values = [stats['last1min']['local']['min_signal']],
interval = 60)
if stats['last1min']['local'].has_key('noise'):
V.dispatch(plugin_instance = instance_name,
host=host,
type='dump1090_dbfs',
type_instance='noise',
time=T(stats['last1min']['end']),
values = [stats['last1min']['local']['noise']],
interval = 60)
V.dispatch(plugin_instance = instance_name,
host=host,
type='dump1090_messages',
type_instance='strong_signals',
time=T(stats['last1min']['end']),
values = [stats['last1min']['local']['strong_signals']],
interval = 60)
def read_stats(instance_name, host, url):
try:
with closing(urlopen(url + '/data/stats.json', None, 5.0)) as stats_file:
stats = json.load(stats_file)
except URLError:
return
# Local message counts
if stats['total'].has_key('local'):
counts = stats['total']['local']['accepted']
V.dispatch(plugin_instance = instance_name,
host=host,
type='dump1090_messages',
type_instance='local_accepted',
time=T(stats['total']['end']),
values = [sum(counts)])
for i in xrange(len(counts)):
V.dispatch(plugin_instance = instance_name,
host=host,
type='dump1090_messages',
type_instance='local_accepted_%d' % i,
time=T(stats['total']['end']),
values = [counts[i]])
# Remote message counts
if stats['total'].has_key('remote'):
counts = stats['total']['remote']['accepted']
V.dispatch(plugin_instance = instance_name,
host=host,
type='dump1090_messages',
type_instance='remote_accepted',
time=T(stats['total']['end']),
values = [sum(counts)])
for i in xrange(len(counts)):
V.dispatch(plugin_instance = instance_name,
host=host,
type='dump1090_messages',
type_instance='remote_accepted_%d' % i,
time=T(stats['total']['end']),
values = [counts[i]])
# Position counts
V.dispatch(plugin_instance = instance_name,
host=host,
type='dump1090_messages',
type_instance='positions',
time=T(stats['total']['end']),
values = [stats['total']['cpr']['global_ok'] + stats['total']['cpr']['local_ok']])
# Tracks
V.dispatch(plugin_instance = instance_name,
host=host,
type='dump1090_tracks',
type_instance='all',
time=T(stats['total']['end']),
values = [stats['total']['tracks']['all']])
V.dispatch(plugin_instance = instance_name,
host=host,
type='dump1090_tracks',
type_instance='single_message',
time=T(stats['total']['end']),
values = [stats['total']['tracks']['single_message']])
# CPU
for k in stats['total']['cpu'].keys():
V.dispatch(plugin_instance = instance_name,
host=host,
type='dump1090_cpu',
type_instance=k,
time=T(stats['total']['end']),
values = [stats['total']['cpu'][k]])
def greatcircle(lat0, lon0, lat1, lon1):
lat0 = lat0 * math.pi / 180.0;
lon0 = lon0 * math.pi / 180.0;
lat1 = lat1 * math.pi / 180.0;
lon1 = lon1 * math.pi / 180.0;
return 6371e3 * math.acos(math.sin(lat0) * math.sin(lat1) + math.cos(lat0) * math.cos(lat1) * math.cos(abs(lon0 - lon1)))
def read_aircraft(instance_name, host, url):
try:
with closing(urlopen(url + '/data/receiver.json', None, 5.0)) as receiver_file:
receiver = json.load(receiver_file)
if receiver.has_key('lat'):
rlat = float(receiver['lat'])
rlon = float(receiver['lon'])
else:
rlat = rlon = None
with closing(urlopen(url + '/data/aircraft.json', None, 5.0)) as aircraft_file:
aircraft_data = json.load(aircraft_file)
except URLError:
return
total = 0
with_pos = 0
max_range = 0
mlat = 0
for a in aircraft_data['aircraft']:
if a['seen'] < 15: total += 1
if a.has_key('seen_pos') and a['seen_pos'] < 15:
with_pos += 1
if rlat is not None:
distance = greatcircle(rlat, rlon, a['lat'], a['lon'])
if distance > max_range: max_range = distance
if 'lat' in a.get('mlat', ()):
mlat += 1
V.dispatch(plugin_instance = instance_name,
host=host,
type='dump1090_aircraft',
type_instance='recent',
time=aircraft_data['now'],
values = [total, with_pos])
V.dispatch(plugin_instance = instance_name,
host=host,
type='dump1090_mlat',
type_instance='recent',
time=aircraft_data['now'],
values = [mlat])
if max_range > 0:
V.dispatch(plugin_instance = instance_name,
host=host,
type='dump1090_range',
type_instance='max_range',
time=aircraft_data['now'],
values = [max_range])
collectd.register_config(callback=handle_config, name='dump1090')
