def get_analytics(self, query):
# key names
mck_analytics_json = str(query.key()) + '.analytics-json'
mck_analytics_json_last_update = str(query.key()) + '.analytics-json-last-update'
mck_metric_last_update = str(query.key()) + '.last-update'
# values
metric_last_update = memcache.get(mck_metric_last_update)
analytics_json_last_update = memcache.get(mck_analytics_json_last_update)
analytics_json = memcache.get(mck_analytics_json)
analytics = None
try:
analytics = json.loads(analytics_json)
except TypeError:
analytics = None
except valueError:
analytics = None
# cache miss condition
if not (analytics is not None and metric_last_update is not None and analytics_json_last_update is not None and int(metric_last_update) < int(analytics_json_last_update)):
# cache miss, so calculate the analytics
analytics = analyze_query_data(query)
analytics_json = json.dumps(analytics)
# update the relevant keys
memcache.set(
key=mck_analytics_json,
value=analytics_json,
)
memcache.set(
key=mck_analytics_json_last_update,
value=datetime.now().strftime('%s'),
)
# must have fallen out of memcache
if metric_last_update is None:
memcache.set(
key=mck_metric_last_update,
value=datetime.now().strftime('%s'),
)
analytics_html = self.generate_analysis_view(analytics)
return analytics_html
def get_analytics(self, query):
# key names
mck_analytics_json = str(query.key()) + '.analytics-json'
mck_analytics_json_last_update = str(query.key()) + '.analytics-json-last-update'
mck_metric_last_update = str(query.key()) + '.last-update'
# key values
metric_last_update = memcache.get(mck_metric_last_update)
analytics_json_last_update = memcache.get(mck_analytics_json_last_update)
analytics_json = memcache.get(mck_analytics_json)
# cache miss condition
if not (analytics_json is not None and metric_last_update is not None and analytics_json_last_update is not None and int(metric_last_update) < int(analytics_json_last_update)):
# cache miss, so calculate the analytics
analytics_json = json.dumps(analyze_query_data(query))
# update the relevant keys
memcache.set(
key=mck_analytics_json,
value=analytics_json,
)
memcache.set(
key=mck_analytics_json_last_update,
value=datetime.now().strftime('%s'),
)
# must have fallen out of memcache
if metric_last_update is None:
memcache.set(
key=mck_metric_last_update,
value=datetime.now().strftime('%s'),
)
return analytics_json