def _ensure_index(self):
"""
Ensure indices for all databases and collections.
first access self._dbs config to get index column names;
then get collection names from self._collNames and loop
over all collections.
"""
if self._collNames and self._dbs:
try:
for dbName in self._dbs:
# Iterate over database configurations.
db = self._dbs[dbName]
dbSelf = db['self']
index = db['index']
collNames = self._collNames[db['collNames']]
# db['self'] is the pymongo.Database object.
for name in collNames:
coll = dbSelf[name]
coll.ensure_index([(index, pymongo.DESCENDING)],
unique=True)
print '[MONGOD]: MongoDB index set.'
return 1
except KeyError:
msg = '[MONGOD]: Unable to set collection indices; ' + \
'infomation in Config.body["dbs"] is incomplete.'
raise VNPAST_DatabaseError(msg)
except Exception, e:
msg = '[MONGOD]: Unable to set collection indices; ' + str(e)
raise VNPAST_DatabaseError(msg)
def download_equity_M1(self, tasks, startYr=2012, endYr=2015):
"""
"""
try:
# map equity tickers to security IDs.
if self._mapTickersToSecIDs:
maps = self._mapTickersToSecIDs
else:
assert os.isfile('./names/secID.json')
jsonFile = open(dName, 'r')
allSecIds = json.loads(jsonFile.read())
jsonFile.close()
allTickers = [s.split('.')[0] for s in allSecIds]
maps = dict(zip(allTickers, allSecIds))
self._mapTickersToSecIDs = maps
tasks_ = [maps[task] for task in tasks]
db = self._dbs['EQU_M1']['self']
self._api.get_equity_M1_interMonth(db,
id=1,
startYr=startYr,
endYr=endYr,
tasks=tasks_)
except AssertionError:
msg = '[MONGOD]: Cannot map tickers to secIDs; ' + \
'secID.json does not exist.'
raise VNPAST_DatabaseError(msg)
except Exception as e:
msg = '[MONGOD]: Unable to download data; ' + str(e)
raise VNPAST_DatabaseError(msg)
def _get_coll_names(self):
"""
get all instruments'names and store them in self._collNames.
"""
try:
if not os.path.exists('names'):
os.makedirs('names')
self._collNames['equTicker'] = self._allEquTickers()
self._collNames['fudTicker'] = self._allFudTickers()
self._collNames['secID'] = self._allSecIds()
self._collNames['futTicker'] = self._allFutTickers()
self._collNames['optTicker'] = self._allOptTickers()
self._collNames['idxTicker'] = self._allIdxTickers()
print('[MONGOD]: Collection names gotten.')
return 1
except AssertionError:
warning = '[MONGOD]: Warning, collection names ' + \
'is an empty list.'
print(warning)
except Exception as e:
msg = '[MONGOD]: Unable to set collection names; ' + \
str(e)
raise VNPAST_DatabaseError(msg)
def download_future_D1(self, start, end, sessionNum=30):
"""
"""
try:
db = self._dbs['FUT_D1']['self']
self._api.get_future_D1_mongod(db, start, end, sessionNum)
except Exception, e:
msg = '[MONGOD]: Unable to download data; ' + str(e)
raise VNPAST_DatabaseError(msg)
def download_index_D1(self, start, end, sessionNum=30):
"""
"""
try:
db = self._dbs['IDX_D1']['self']
self._api.get_index_D1_overlord(db, 'mongod', start, end,
sessionNum)
except Exception, e:
msg = '[MONGOD]: Unable to download data; ' + str(e)
raise VNPAST_DatabaseError(msg)
def update_equity_D1_(self, sessionNum=30):
"""
"""
try:
# set databases and tickers
db = self._dbs['EQU_D1']['self']
index = self._dbs['EQU_D1']['index']
allEquTickers = self._allEquTickers()
coll = db[allEquTickers[0]]
# find the latest timestamp in collection.
latest = coll.find_one(sort=[(index, pymongo.DESCENDING)])[index]
start = datetime.strftime(latest + timedelta(days=1), '%Y%m%d')
end = datetime.strftime(datetime.now(), '%Y%m%d')
# then download.
self._api.get_equity_D1_mongod(db, start, end, sessionNum)
except Exception as e:
msg = '[MONGOD]: Unable to update data; ' + str(e)
raise VNPAST_DatabaseError(msg)
def __update(self, key, target1, target2, sessionNum):
"""
Basic update method.
Looks into the database specified by 'key', find the latest
record in the collection of it. Then update the collections
till last trading date.
parameters
----------
* key: string; a database alias (refer to the database config)
e.g., 'EQU_D1'.
* target1: method; pointer to the function with which controller
obtain all tickers in the database. Concretely, target1 are
self._all#Tickers methods.
* target2: method; pointer to the api overlord requesting functions
i.e. self._api.get_###_mongod methods.
* sessionNum: integer; the number of threads.
"""
try:
# get databases and tickers
db = self._dbs[key]['self']
index = self._dbs[key]['index']
allTickers = target1()
coll = db[allTickers[0]]
# find the latest timestamp in collection.
latest = coll.find_one(sort=[(index, pymongo.DESCENDING)])[index]
start = datetime.strftime(latest + timedelta(days=1), '%Y%m%d')
end = datetime.strftime(datetime.now(), '%Y%m%d')
# then download.
target2(db, start, end, sessionNum)
return db
except Exception, e:
msg = '[MONGOD]: Unable to update data; ' + str(e)
raise VNPAST_DatabaseError(msg)
