global types

f = open(path, 'r')

for line in f:

fields = line.split()

if len(fields) < 2:

continue

type_name = fields[0]

if type_name[0] == '#':

continue

v = []

for ds in fields[1:]:

ds = ds.rstrip(',')

ds_fields = ds.split(':')

if len(ds_fields) != 4:

collectd.warning('carbon_writer: cannot parse data source %s on type %s' % ( ds, type_name ))

continue

v.append(ds_fields)

types[type_name] = v

"""

Convert type limits from strings to floats for arithmetic.

Will force U[nlimited] values to be 0.

"""

try:

n = float(s)

except ValueError:

n = 0

global host, port, differentiate_values, differentiate_values_over_time, \

prefix, postfix, host_separator, metric_separator

for child in c.children:

if child.key == 'LineReceiverHost':

host = child.values[0]

elif child.key == 'LineReceiverPort':

port = int(child.values[0])

elif child.key == 'TypesDB':

for v in child.values:

carbon_parse_types_file(v)

# DeriveCounters maintained for backwards compatibility

elif child.key == 'DeriveCounters':

differentiate_values = True

elif child.key == 'DifferentiateCounters':

differentiate_values = True

elif child.key == 'DifferentiateCountersOverTime':

differentiate_values = True

differentiate_values_over_time = True

elif child.key == 'MetricPrefix':

prefix = child.values[0]

elif child.key == 'HostPostfix':

postfix = child.values[0]

elif child.key == 'HostSeparator':

host_separator = child.values[0]

elif child.key == 'MetricSeparator':

metric_separator = child.values[0]

if not host:

raise Exception('LineReceiverHost not defined')

if not port:

import threading

d = {

'host': host,

'port': port,

'differentiate_values': differentiate_values,

'differentiate_values_over_time': differentiate_values_over_time,

'sock': None,

'lock': threading.Lock(),

'values': { },

'last_connect_time': 0

}

carbon_connect(d)

result = False

if not data['sock']:

# only attempt reconnect every 10 seconds

now = time()

if now - data['last_connect_time'] < 10:

return False

data['last_connect_time'] = now

collectd.info('connecting to %s:%s' % ( data['host'], data['port'] ) )

try:

data['sock'] = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

data['sock'].connect((host, port))

result = True

except:

result = False

collectd.warning('error connecting socket: %s' % format_exc())

else:

result = True

result = False

data['lock'].acquire()

try:

data['sock'].sendall(s)

result = True

except socket.error, e:

data['sock'] = None

if isinstance(e.args, tuple):

collectd.warning('carbon_writer: socket error %d' % e[0])

else:

collectd.warning('carbon_writer: socket error')

except:

collectd.warning('carbon_writer: error sending data: %s' % format_exc())

data['lock'].release()

data['lock'].acquire()

if not carbon_connect(data):

data['lock'].release()

collectd.warning('carbon_writer: no connection to carbon server')

return

data['lock'].release()

if v.type not in types:

collectd.warning('carbon_writer: do not know how to handle type %s. do you have all your types.db files configured?' % v.type)

return

v_type = types[v.type]

if len(v_type) != len(v.values):

collectd.warning('carbon_writer: differing number of values for type %s' % v.type)

return

metric_fields = []

if prefix:

metric_fields.append(prefix)

metric_fields.append(v.host.replace('.', host_separator))

if postfix is not None:

metric_fields.append(postfix)

metric_fields.append(v.plugin)

if v.plugin_instance:

metric_fields.append(v.plugin_instance.replace('.', metric_separator))

metric_fields.append(v.type)

if v.type_instance:

metric_fields.append(v.type_instance.replace('.', metric_separator))

time = v.time

# we update shared recorded values, so lock to prevent race conditions

data['lock'].acquire()

lines = []

i = 0

for value in v.values:

ds_name = v_type[i][0]

ds_type = v_type[i][1]

path_fields = metric_fields[:]

path_fields.append(ds_name)

metric = '.'.join(path_fields)

new_value = None

# perform data normalization for COUNTER and DERIVE points

if (isinstance(value, (float, int)) and

data['differentiate_values'] and

(ds_type == 'COUNTER' or ds_type == 'DERIVE')):

# we have an old value

if metric in data['values']:

old_time, old_value = data['values'][metric]

# overflow

if value < old_value:

v_type_max = v_type[i][3]

if v_type_max == 'U':

# this is funky. pretend as if this is the first data point

new_value = None

else:

v_type_min = str_to_num(v_type[i][2])

v_type_max = str_to_num(v_type[i][3])

new_value = v_type_max - old_value + value - v_type_min

else:

new_value = value - old_value

if data['differentiate_values_over_time']:

interval = time - old_time

if interval < 1:

interval = 1

new_value = new_value / interval

# update previous value

data['values'][metric] = ( time, value )

else:

new_value = value

if new_value is not None:

line = '%s %f %d' % ( metric, new_value, time )

lines.append(line)

i += 1

data['lock'].release()

lines.append('')