def _read(self):
"""
Read one line at a time, publish as a packet with TS of 0
It is expected that the driver will use the internal timestamp
of the record as the definitive timestamp
"""
if self._filehandle is None and not self.files:
log.msg('Completed reading specified port agent logs, exiting...')
reactor.stop()
return
if self._filehandle is None:
name = self.files.pop(0)
log.msg('Begin reading:', name)
self._filehandle = open(name, 'r')
data = self._filehandle.read(1024)
if data != '':
header = PacketHeader(packet_type=PacketType.FROM_INSTRUMENT, payload_size=len(data), packet_time=0)
header.set_checksum(data)
packet = [Packet(payload=data, header=header)]
self.router.got_data(packet)
else:
self._filehandle.close()
self._filehandle = None
# allow the reactor loop to process other events
reactor.callLater(0.01, self._read)
def _read(self):
"""
Read a chunk of data and inspect it for a complete DIGI ASCII record. When found, publish.
"""
if self._filehandle is None and not self.files:
log.msg('Completed reading specified port agent logs')
return
if self._filehandle is None:
name = self.files.pop(0)
log.msg('Begin reading:', name)
self._filehandle = open(name, 'r')
chunk = self._filehandle.read(1024)
if chunk != '':
self.buffer += chunk
new_index = 0
for match in self.ooi_ts_regex.finditer(self.buffer):
payload = match.group(2)
try:
packet_time = string_to_ntp_date_time(match.group(1))
header = PacketHeader(packet_type=PacketType.FROM_INSTRUMENT, payload_size=len(payload),
packet_time=packet_time)
header.set_checksum(payload)
packet = Packet(payload=payload, header=header)
self.router.got_data([packet])
except ValueError:
log.err('Unable to extract timestamp from record: %r' % match.group())
new_index = match.end()
if new_index > 0:
self.buffer = self.buffer[new_index:]
if len(self.buffer) > self.MAXBUF:
self.buffer = self.buffer[-self.MAXBUF:]
else:
self._filehandle.close()
self._filehandle = None
# allow the reactor loop to process other events
reactor.callLater(0.01, self._read)
