def get(self):
# We need to be careful here. It's possible this handler could run in the
# window between when the CHPData is updated and when the incidents get
# updated. So throw in 5 minutes of padding.
#
# See also: https://developers.google.com/appengine/docs/python/ndb/#writes
query = CHPIncident.query(CHPIncident.updated < CHPData.last_updated() - timedelta(minutes=5))
count = query.count()
keys = query.fetch(keys_only=True)
ndb.delete_multi(keys)
self.response.write("Purged %d records." % count)
def get_incidents(self):
"""Return CHP incidents given various request args.
"""
center = self.request.get("center")
dispatch = self.request.get("dispatch")
area = self.request.get("area")
city = self.request.get("city")
# Change this for the West Sac News-Leger since no one appears home there
if "http://www.westsac.com/news-ledger" in self.request.headers['User-Agent']:
if dispatch == "":
dispatch = 'SACC'
memcache_key = "incidents-%s-%s-%s-%s" % (center, dispatch, area, city)
# Don't even try the cache if this looks like a PubSubHubBub request.
if "pubsubhubbub" in self.request.headers['User-Agent']:
incidents = None
else:
incidents = memcache.get(memcache_key)
if incidents is None:
query = CHPIncident.query().order(-CHPIncident.LogTime)
if city != "":
query = query.filter(CHPIncident.city == city)
elif area != "":
query = query.filter(CHPIncident.Area == area)
elif dispatch != "":
query = query.filter(CHPIncident.DispatchID == dispatch)
elif center != "":
query = query.filter(CHPIncident.CenterID == center)
incidents = query.fetch(10000)
try:
memcache.set(memcache_key, incidents, 300)
except:
pass
if len(incidents) > 0:
self.incidents_last_mod = max(incidents, key=lambda incident: incident.updated).updated
else:
self.incidents_last_mod = CHPData.last_updated()
self.incidents = incidents