def _load_hist_agg(self):
self._debug("Loading data for historical_usage table")
# necessary because it's entirely possible for a last_update query to
# return no data
if len(self.hist_agg_data) > 0 or self.dry_run:
self._load_many(self.hist_agg_query, self.hist_agg_data)
DB.local().commit()
# note that we never /use/ this to determine whether to update or
# not, this is for informational purposes only
self.set_last_update(table="historical_usage")
def _load(self):
self._info("Loading data for " + self.table + " table")
cursor = DB.local_cursor()
# necessary because it's entirely possible for a last_update query to
# return no data
if len(self.data) > 0:
cursor.executemany(self.queries['update'],
self.data)
DB.local().commit()
self._debug("Rows updated: %d" % (cursor.rowcount))
self.set_last_update()
def set_last_update(self, table=None):
"""
Set the last_update field to the current time for the given table
"""
if not table:
table = self.table
if self.dry_run:
self._debug("Setting last update on table " + table)
return
cursor = DB.local_cursor(dictionary=False)
cursor.execute(self.metadata_update, (table, ))
DB.local().commit()
def load(self):
start = datetime.now()
# the aggregate table is simple to deal with.
self._load_simple()
# we need to be a little careful with the aggregate_host table, because
# it's a real pain to know if hosts have been removed (we capture all
# the additions, of course, but not the removals). So we need to delete
# everything and start afresh with each update. To avoid people seeing
# things in an odd state we need to wrap this in a transaction.
if not self.dry_run:
DB.local().start_transaction()
cursor = DB.local_cursor()
self._run_sql_cursor(cursor, self.aggregate_host_cleanup)
self._load_many(self.aggregate_host_query, self.agg_host_data)
DB.local().commit()
self.load_time = datetime.now() - start
def _load_has_instance_data(self):
self._debug("Updating project table with has instance data")
if len(self.has_instance_data) > 0 or self.dry_run:
self._load_many(self.has_instance_update_query,
self.has_instance_data)
DB.local().commit()
