def testEmittedSampleDatetime(self):
key = "bogus-test-key"
# Establish initial sample datetime
result = metric_utils.establishLastEmittedSampleDatetime(key, 300)
# Cleanup
self.addCleanup(collectorsdb.engineFactory().execute,
schema.emittedSampleTracker.delete().where(
(schema.emittedSampleTracker.c.key == key)
)
)
self.assertIsInstance(result, datetime)
# Update latest emitted sample datetime to now
now = datetime.utcnow().replace(microsecond=0)
metric_utils.updateLastEmittedSampleDatetime(key, now)
# Verify that it was updated
lastEmittedSample = metric_utils.queryLastEmittedSampleDatetime(key)
self.assertEqual(now, lastEmittedSample)
self.assertLess(result, lastEmittedSample)
def testEmittedSampleDatetime(self):
key = "bogus-test-key"
# Establish initial sample datetime
result = metric_utils.establishLastEmittedSampleDatetime(key, 300)
# Cleanup
self.addCleanup(
collectorsdb.engineFactory().execute,
schema.emittedSampleTracker.delete().where(
(schema.emittedSampleTracker.c.key == key)))
self.assertIsInstance(result, datetime)
# Update latest emitted sample datetime to now
now = datetime.utcnow().replace(microsecond=0)
metric_utils.updateLastEmittedSampleDatetime(key, now)
# Verify that it was updated
lastEmittedSample = metric_utils.queryLastEmittedSampleDatetime(key)
self.assertEqual(now, lastEmittedSample)
self.assertLess(result, lastEmittedSample)
def testUpdateLastEmittedSampleDatetime(self, collectorsdbMock):
collectorsdbMock.engineFactory.return_value = Mock(
spec_set=sqlalchemy.engine.Engine)
metric_utils.updateLastEmittedSampleDatetime("twitter-tweets-volume",
datetime.utcnow())
args, _ = (collectorsdbMock.engineFactory.return_value.execute.
call_args_list[0])
self.assertTrue(args)
self.assertIsInstance(args[0], sqlalchemy.sql.dml.Update)
def testUpdateLastEmittedSampleDatetime(self, collectorsdbMock):
collectorsdbMock.engineFactory.return_value = Mock(
spec_set=sqlalchemy.engine.Engine)
metric_utils.updateLastEmittedSampleDatetime("twitter-tweets-volume",
datetime.utcnow())
args, _ = (collectorsdbMock
.engineFactory
.return_value
.execute
.call_args_list[0])
self.assertTrue(args)
self.assertIsInstance(args[0], sqlalchemy.sql.dml.Update)
def _forwardNewsVolumeMetrics(metricSpecs,
lastEmittedAggTime,
stopDatetime,
periodSec,
metricDestAddr):
""" Query news volume metrics since the given last emitted timestamp through
stopDatetime and forward them to htmengine's Metric Listener. Update the
datetime of the last successfully-emitted news volume metric batch in the
database.
NOTE: forwarding will be aborted upon failure to connect to Metic Listener. In
this case, an error will be logged, and the function will return the UTC
timestamp of the last successfully-emitted sample aggregation interval. Once
Metric Listener comes online, a subsequent call to this function will catch
up by forwarding the stored samples since last successful emission.
:param metrics: a sequence of NewsVolumeMetricSpec objects corresponding to
the metrics to be emitted
:param lastEmittedAggTime: UTC datetime of last successfully-emitted sample
batch
:param stopDatetime: non-inclusive upper bound UTC datetime for forwarding
:param periodSec: aggregation period in seconds
:param metricDestAddr: two-tuple (metricDestHost, metricDestPort)
:returns: UTC timestamp of the last successfully-emitted sample batch.
:rtype: datetime.datetime
"""
periodTimedelta = timedelta(seconds=periodSec)
aggStartDatetime = lastEmittedAggTime + periodTimedelta
while aggStartDatetime < stopDatetime:
# Get News Volume metrics for one aggregation interval
aggStopDatetime = aggStartDatetime + periodTimedelta
symbolToNewsVolumeMap = defaultdict(
int,
_queryNewsVolumes(aggStartDatetime, aggStopDatetime))
# Generate metric samples
epochTimestamp = date_time_utils.epochFromNaiveUTCDatetime(aggStartDatetime)
samples = tuple(
dict(
metricName=spec.metric,
value=symbolToNewsVolumeMap[spec.symbol],
epochTimestamp=epochTimestamp)
for spec in metricSpecs
)
# Emit samples to Metric Listener
try:
with metric_utils.metricDataBatchWrite(log=g_log) as putSample:
for sample in samples:
putSample(**sample)
except Exception:
g_log.exception("Failure while emitting metric data for agg=%s "
"containing numSamples=%d",
aggStartDatetime, len(samples))
return lastEmittedAggTime
else:
g_log.info("Forwarded numSamples=%d for agg=%s",
len(samples), aggStartDatetime)
# Update db with last successfully-emitted datetime
metric_utils.updateLastEmittedSampleDatetime(
key=_EMITTED_NEWS_VOLUME_SAMPLE_TRACKER_KEY,
sampleDatetime=aggStartDatetime)
# Set up for next iteration
lastEmittedAggTime = aggStartDatetime
aggStartDatetime = aggStopDatetime
return lastEmittedAggTime
def _forwardNewsVolumeMetrics(metricSpecs, lastEmittedAggTime, stopDatetime,
periodSec, metricDestAddr):
""" Query news volume metrics since the given last emitted timestamp through
stopDatetime and forward them to htmengine's Metric Listener. Update the
datetime of the last successfully-emitted news volume metric batch in the
database.
NOTE: forwarding will be aborted upon failure to connect to Metic Listener. In
this case, an error will be logged, and the function will return the UTC
timestamp of the last successfully-emitted sample aggregation interval. Once
Metric Listener comes online, a subsequent call to this function will catch
up by forwarding the stored samples since last successful emission.
:param metrics: a sequence of NewsVolumeMetricSpec objects corresponding to
the metrics to be emitted
:param lastEmittedAggTime: UTC datetime of last successfully-emitted sample
batch
:param stopDatetime: non-inclusive upper bound UTC datetime for forwarding
:param periodSec: aggregation period in seconds
:param metricDestAddr: two-tuple (metricDestHost, metricDestPort)
:returns: UTC timestamp of the last successfully-emitted sample batch.
:rtype: datetime.datetime
"""
periodTimedelta = timedelta(seconds=periodSec)
aggStartDatetime = lastEmittedAggTime + periodTimedelta
while aggStartDatetime < stopDatetime:
# Get News Volume metrics for one aggregation interval
aggStopDatetime = aggStartDatetime + periodTimedelta
symbolToNewsVolumeMap = defaultdict(
int, _queryNewsVolumes(aggStartDatetime, aggStopDatetime))
# Generate metric samples
epochTimestamp = date_time_utils.epochFromNaiveUTCDatetime(
aggStartDatetime)
samples = tuple(
dict(metricName=spec.metric,
value=symbolToNewsVolumeMap[spec.symbol],
epochTimestamp=epochTimestamp) for spec in metricSpecs)
# Emit samples to Metric Listener
try:
with metric_utils.metricDataBatchWrite(log=g_log) as putSample:
for sample in samples:
putSample(**sample)
except Exception:
g_log.exception(
"Failure while emitting metric data for agg=%s "
"containing numSamples=%d", aggStartDatetime, len(samples))
return lastEmittedAggTime
else:
g_log.info("Forwarded numSamples=%d for agg=%s", len(samples),
aggStartDatetime)
# Update db with last successfully-emitted datetime
metric_utils.updateLastEmittedSampleDatetime(
key=_EMITTED_NEWS_VOLUME_SAMPLE_TRACKER_KEY,
sampleDatetime=aggStartDatetime)
# Set up for next iteration
lastEmittedAggTime = aggStartDatetime
aggStartDatetime = aggStopDatetime
return lastEmittedAggTime
def main():
"""
NOTE: main also serves as entry point for "console script" generated by setup
"""
logging_support.LoggingSupport().initTool()
try:
options = _parseArgs()
g_log.info("Verifying that agents are in hot_standby mode")
for section in config.sections():
try:
assert config.get(section, "opmode") == ApplicationConfig.OP_MODE_HOT_STANDBY
except Exception, e:
raise
g_log.info("Verifying that the old symbol has been removed from the " "metrics configuration")
for stockData in metric_utils.getMetricsConfiguration().itervalues():
assert stockData["symbol"] != options.old_symbol
if options.twitter and (not options.stocks):
g_log.info(
"Migrating ONLY twitter data from old-symbol=%s " "to new-symbol=%s",
options.old_symbol,
options.new_symbol,
)
elif options.stocks and (not options.twitter):
g_log.info(
"Migrating ONLY xignite stock data from old-symbol=%s " "to new-symbol=%s",
options.old_symbol,
options.new_symbol,
)
raise NotImplementedError
else:
g_log.info(
"Migrating BOTH twitter and xignite stock data from " "old-symbol=%s to new-symbol=%s",
options.old_symbol,
options.new_symbol,
)
raise NotImplementedError
oldSymbolTweetPrefix = "TWITTER.TWEET.HANDLE.{symbol}.".format(symbol=options.old_symbol)
newSymbolTweetPrefix = "TWITTER.TWEET.HANDLE.{symbol}.".format(symbol=options.new_symbol)
oldSymbolTweetMetricsList = []
with collectorsdb.engineFactory().begin() as conn:
g_log.info("Renaming metrics to new symbol")
if options.twitter:
oldSymbolTweetsQuery = sql.select([tweetSamplesSchema]).where(
tweetSamplesSchema.c.metric.contains(oldSymbolTweetPrefix)
)
oldSymbolTweets = conn.execute(oldSymbolTweetsQuery)
for tweetSample in oldSymbolTweets:
newMetricName = "{newPrefix}{metric}".format(
newPrefix=newSymbolTweetPrefix, metric=tweetSample.metric[len(oldSymbolTweetPrefix) :]
)
if tweetSample.metric not in oldSymbolTweetMetricsList:
oldSymbolTweetMetricsList.append(tweetSample.metric)
updateSampleQuery = (
tweetSamplesSchema.update()
.where(tweetSamplesSchema.c.seq == tweetSample.seq)
.values(metric=newMetricName)
)
conn.execute(updateSampleQuery)
g_log.info("Forwarding new twitter metric data to Taurus engine...")
if options.twitter:
oldestRecordTs = conn.execute(
sql.select([tweetSamplesSchema.c.agg_ts], order_by=tweetSamplesSchema.c.agg_ts.asc())
).first()[0]
lastEmittedAggTime = metric_utils.establishLastEmittedSampleDatetime(
key=_EMITTED_TWEET_VOLUME_SAMPLE_TRACKER_KEY, aggSec=options.aggPeriod
)
aggOffset = (
math.ceil(
(epochFromNaiveUTCDatetime(lastEmittedAggTime) - epochFromNaiveUTCDatetime(oldestRecordTs))
/ options.aggPeriod
)
* options.aggPeriod
)
aggStartDatetime = (
lastEmittedAggTime - timedelta(seconds=aggOffset) - timedelta(seconds=options.aggPeriod)
)
metric_utils.updateLastEmittedSampleDatetime(
key=_EMITTED_TWEET_VOLUME_SAMPLE_TRACKER_KEY, sampleDatetime=aggStartDatetime
)
MetricDataForwarder.runInThread(
metricSpecs=loadMetricSpecs(),
aggSec=options.aggPeriod,
symbolList=[options.new_symbol],
forwardOnlyBacklog=True,
)
metric_utils.updateLastEmittedSampleDatetime(
key=_EMITTED_TWEET_VOLUME_SAMPLE_TRACKER_KEY, sampleDatetime=lastEmittedAggTime
)
g_log.info("Forwarding metrics to dynamodb using new symbol...")
if options.twitter:
migrate_tweets_to_dynamodb.main(symbolList=[options.new_symbol])
g_log.info("Unmonitoring and deleting existing metrics associated with " "symbol=%s", options.old_symbol)
oldModels = metric_utils.getSymbolModels(options.htmServer, options.apikey, options.old_symbol)
for model in oldModels:
metric_utils.unmonitorMetric(options.htmServer, options.apikey, model.uid)
metric_utils.deleteMetric(options.htmServer, options.apikey, model.name)
