def demo(key, feed_id=None, datastream_id=None, timestamp=None):
client = Client()
if feed_id and datastream_id:
if timestamp:
# read the datapoint at the specified timestamp
try:
logging.info("Reading the datapoint at %s" % timestamp)
datapoint = yield client.read_datapoint(api_key=key,
feed_id=feed_id,
datastream_id=datastream_id,
timestamp=timestamp)
if datapoint:
logging.info("Success reading the datapoint:\n%s\n" % datapoint)
else:
logging.error("Problem occurred reading the datapoint")
except Exception, ex:
logging.error("Problem reading the datapoint: %s" % str(ex))
else:
# no specific datapoint was requested so just show the last 10 minutes worth
# create historical query parameters spanning the last 10 minutes
ten_minutes_ago_timestamp = datetime.datetime.utcnow() - datetime.timedelta(minutes=10)
start_timestamp = "%sZ" % (ten_minutes_ago_timestamp.isoformat())
parameters = {'start':start_timestamp, 'interval':0}
try:
logging.info("Requesting to view the last 10 minutes of historical datapoints for datastream %s in feed %s starting from %s" % (datastream_id, feed_id, start_timestamp))
datastream = yield client.read_datastream(api_key=key,
feed_id=feed_id,
datastream_id=datastream_id,
parameters=parameters)
if datastream:
logging.info("Success retrieving datastream historical datapoints:\n%s\n" % datastream)
else:
logging.error("Problem reading datastream")
except Exception, ex:
logging.error("Error reading datastream: %s" % str(ex))
