def _get_timeframe_bounds(self, timeframe, bucket_width):
"""
Get a `bucket_width` aligned `start_time` and `end_time` from a
`timeframe` dict
"""
if bucket_width:
bucket_width_seconds = bucket_width
bucket_width = epoch_time_to_kronos_time(bucket_width)
# TODO(derek): Potential optimization by setting the end_time equal to the
# untrusted_time if end_time > untrusted_time and the results are not being
# output to the user (only for caching)
if timeframe['mode'] == 'recent':
# Set end_time equal to now and align to bucket width
end_time = datetime_to_kronos_time(datetime.datetime.now())
original_end_time = end_time
duration = get_seconds(timeframe['value'], timeframe['scale'])
duration = epoch_time_to_kronos_time(duration)
start_time = original_end_time - duration
if bucket_width:
# Align values to the bucket width
# TODO(derek): Warn the user that the timeframe has been altered to fit
# the bucket width
if (end_time % bucket_width) != 0:
end_time += bucket_width - (end_time % bucket_width)
if (start_time % bucket_width) != 0:
start_time -= (start_time % bucket_width)
start = kronos_time_to_datetime(start_time)
end = kronos_time_to_datetime(end_time)
elif timeframe['mode'] == 'range':
end = datetime.datetime.strptime(timeframe['to'], DT_FORMAT)
end_seconds = datetime_to_epoch_time(end)
start = datetime.datetime.strptime(timeframe['from'], DT_FORMAT)
start_seconds = datetime_to_epoch_time(start)
if bucket_width:
# Align values to the bucket width
# TODO(derek): Warn the user that the timeframe has been altered to fit
# the bucket width
start_bump = start_seconds % bucket_width_seconds
start -= datetime.timedelta(seconds=start_bump)
if (end_seconds % bucket_width_seconds) != 0:
end_bump = bucket_width_seconds - (end_seconds % bucket_width_seconds)
end += datetime.timedelta(seconds=end_bump)
else:
raise ValueError("Timeframe mode must be 'recent' or 'range'")
return start, end
def process_args():
parser = argparse.ArgumentParser()
parser.add_argument(
'--kronos-url1',
required=True,
help='The first Kronos server to retrieve data from')
parser.add_argument(
'--kronos-url2',
required=True,
help='The second Kronos server to retrieve data from')
parser.add_argument(
'--namespace1',
help='The namespace to read from the first Kronos server (optional)')
parser.add_argument(
'--namespace2',
help='The namespace to read from the second Kronos server (optional)')
parser.add_argument(
'--stream1',
help='The stream to read from the first Kronos server')
parser.add_argument(
'--stream2',
help='The stream to read from the second Kronos server')
parser.add_argument(
'--streams-file',
help='The name of the file with a stream name per line to copy')
parser.add_argument(
'--start',
required=True,
help='When to start retreiving? (format: 2003-09-25T10:49:41.5-03:00)')
parser.add_argument(
'--end',
required=True,
help='When to end retreiving? (format: 2003-09-25T10:49:41.5-03:00)')
group = parser.add_argument_group(title='sampling arguments',
description=('Only compare samples of '
'events.'))
group.add_argument('--num-samples',
type=int,
help=('Number of samples to compare?'))
group.add_argument('--sample-interval',
type=int,
default=3600,
help=('Interval of the sample (in seconds). Defaults to '
'1 hour (3600) (optional)'))
args = parser.parse_args()
if not bool(args.streams_file) ^ bool(args.stream1 and args.stream2):
print 'Please specify either `stream-file` or both `stream1 and stream2`.'
sys.exit(1)
args.start = datetime_to_kronos_time(parse(args.start))
args.end = datetime_to_kronos_time(parse(args.end))
args.sample_interval = epoch_time_to_kronos_time(args.sample_interval)
return args
def _compute_bucket(self, bucket, untrusted_time=None, cache=False):
bucket_start = kronos_time_to_datetime(
epoch_time_to_kronos_time(bucket))
bucket_end = kronos_time_to_datetime(
epoch_time_to_kronos_time(bucket + self._bucket_width))
bucket_events = list(self._query_function(bucket_start, bucket_end,
*self._query_function_args,
**self._query_function_kwargs))
if cache:
# If all events in the bucket happened before the untrusted
# time, cache the query results.
if not untrusted_time or bucket_end < untrusted_time:
caching_event = {TIMESTAMP_FIELD: bucket_start,
QueryCache.CACHE_KEY: bucket_events}
self._client.delete(self._scratch_stream, bucket_start,
bucket_start + timedelta(milliseconds=1),
namespace=self._scratch_namespace)
self._client.put({self._scratch_stream: [caching_event]},
namespace=self._scratch_namespace)
return bucket_events
def process_args():
parser = argparse.ArgumentParser()
parser.add_argument('--kronos-url1',
required=True,
help='The first Kronos server to retrieve data from')
parser.add_argument('--kronos-url2',
required=True,
help='The second Kronos server to retrieve data from')
parser.add_argument(
'--namespace1',
help='The namespace to read from the first Kronos server (optional)')
parser.add_argument(
'--namespace2',
help='The namespace to read from the second Kronos server (optional)')
parser.add_argument('--stream1',
help='The stream to read from the first Kronos server')
parser.add_argument(
'--stream2', help='The stream to read from the second Kronos server')
parser.add_argument(
'--streams-file',
help='The name of the file with a stream name per line to copy')
parser.add_argument(
'--start',
required=True,
help='When to start retreiving? (format: 2003-09-25T10:49:41.5-03:00)')
parser.add_argument(
'--end',
required=True,
help='When to end retreiving? (format: 2003-09-25T10:49:41.5-03:00)')
group = parser.add_argument_group(title='sampling arguments',
description=('Only compare samples of '
'events.'))
group.add_argument('--num-samples',
type=int,
help=('Number of samples to compare?'))
group.add_argument(
'--sample-interval',
type=int,
default=3600,
help=('Interval of the sample (in seconds). Defaults to '
'1 hour (3600) (optional)'))
args = parser.parse_args()
if not bool(args.streams_file) ^ bool(args.stream1 and args.stream2):
print 'Please specify either `stream-file` or both `stream1 and stream2`.'
sys.exit(1)
args.start = datetime_to_kronos_time(parse(args.start))
args.end = datetime_to_kronos_time(parse(args.end))
args.sample_interval = epoch_time_to_kronos_time(args.sample_interval)
return args
