def getContentKey(self, timeSlot):
"""
Get the content key for the hour covering timeSlot.
:param float timeSlot: The time slot as milliseconds since Jan 1,
1970 UTC.
:return: A Blob with the encoded key.
:rtype: Blob
:raises ProducerDb.Error: If there is no key covering timeSlot or other
database error.
"""
fixedTimeSlot = ProducerDb.getFixedTimeSlot(timeSlot)
contentKey = None
try:
cursor = self._database.cursor()
cursor.execute("SELECT key FROM contentkeys where timeslot=?",
(fixedTimeSlot, ))
result = cursor.fetchone()
if result != None:
contentKey = Blob(bytearray(result[0]), False)
cursor.close()
except Exception as ex:
raise ProducerDb.Error(
"Sqlite3ProducerDb.getContentKey: SQLite error: " + str(ex))
if contentKey == None:
raise ProducerDb.Error(
"Sqlite3ProducerDb.getContentKey: Cannot get the key from the database"
)
return contentKey
def hasContentKey(self, timeSlot):
"""
Check if a content key exists for the hour covering timeSlot.
:param float timeSlot: The time slot as milliseconds since Jan 1,
1970 UTC.
:return: True if there is a content key for timeSlot.
:rtype: bool
:raises ProducerDb.Error: For a database error.
"""
fixedTimeSlot = ProducerDb.getFixedTimeSlot(timeSlot)
result = False
try:
cursor = self._database.cursor()
cursor.execute("SELECT key FROM contentkeys where timeslot=?",
(fixedTimeSlot, ))
if cursor.fetchone() != None:
result = True
cursor.close()
return result
except Exception as ex:
raise ProducerDb.Error(
"Sqlite3ProducerDb.hasContentKey: SQLite error: " + str(ex))
def getContentKey(self, timeSlot):
"""
Get the content key for the hour covering timeSlot.
:param float timeSlot: The time slot as milliseconds since Jan 1,
1970 UTC.
:return: A Blob with the encoded key.
:rtype: Blob
:raises ProducerDb.Error: If there is no key covering timeSlot or other
database error.
"""
fixedTimeSlot = ProducerDb.getFixedTimeSlot(timeSlot)
contentKey = None
try:
cursor = self._database.cursor()
cursor.execute(
"SELECT key FROM contentkeys where timeslot=?", (fixedTimeSlot, ))
result = cursor.fetchone()
if result != None:
contentKey = Blob(bytearray(result[0]), False)
cursor.close()
except Exception as ex:
raise ProducerDb.Error(
"Sqlite3ProducerDb.getContentKey: SQLite error: " + str(ex))
if contentKey == None:
raise ProducerDb.Error(
"Sqlite3ProducerDb.getContentKey: Cannot get the key from the database")
return contentKey
def hasContentKey(self, timeSlot):
"""
Check if a content key exists for the hour covering timeSlot.
:param float timeSlot: The time slot as milliseconds since Jan 1,
1970 UTC.
:return: True if there is a content key for timeSlot.
:rtype: bool
:raises ProducerDb.Error: For a database error.
"""
fixedTimeSlot = ProducerDb.getFixedTimeSlot(timeSlot)
result = False
try:
cursor = self._database.cursor()
cursor.execute(
"SELECT key FROM contentkeys where timeslot=?", (fixedTimeSlot, ))
if cursor.fetchone() != None:
result = True
cursor.close()
return result
except Exception as ex:
raise ProducerDb.Error(
"Sqlite3ProducerDb.hasContentKey: SQLite error: " + str(ex))
def deleteContentKey(self, timeSlot):
"""
Delete the content key for the hour covering timeSlot. If there is no
key for the time slot, do nothing.
:param float timeSlot: The time slot as milliseconds since Jan 1,
1970 UTC.
:raises ProducerDb.Error: For a database error.
"""
fixedTimeSlot = ProducerDb.getFixedTimeSlot(timeSlot)
try:
cursor = self._database.cursor()
cursor.execute("DELETE FROM contentkeys WHERE timeslot=?",
(fixedTimeSlot, ))
self._database.commit()
cursor.close()
except Exception as ex:
raise ProducerDb.Error(
"Sqlite3ProducerDb.deleteContentKey: SQLite error: " + str(ex))
def addContentKey(self, timeSlot, key):
"""
Add key as the content key for the hour covering timeSlot.
:param float timeSlot: The time slot as milliseconds since Jan 1,
1970 UTC.
:param Blob key: The encoded key.
:raises ProducerDb.Error: If a key for the same hour already exists in
the database, or other database error.
"""
fixedTimeSlot = ProducerDb.getFixedTimeSlot(timeSlot)
try:
cursor = self._database.cursor()
cursor.execute(
"INSERT INTO contentkeys (timeslot, key) values (?, ?)",
(fixedTimeSlot, sqlite3.Binary(bytearray(key.buf()))))
self._database.commit()
cursor.close()
except Exception as ex:
raise ProducerDb.Error(
"Sqlite3ProducerDb.addContentKey: SQLite error: " + str(ex))
def deleteContentKey(self, timeSlot):
"""
Delete the content key for the hour covering timeSlot. If there is no
key for the time slot, do nothing.
:param float timeSlot: The time slot as milliseconds since Jan 1,
1970 UTC.
:raises ProducerDb.Error: For a database error.
"""
fixedTimeSlot = ProducerDb.getFixedTimeSlot(timeSlot)
try:
cursor = self._database.cursor()
cursor.execute(
"DELETE FROM contentkeys WHERE timeslot=?", (fixedTimeSlot, ))
self._database.commit()
cursor.close()
except Exception as ex:
raise ProducerDb.Error(
"Sqlite3ProducerDb.deleteContentKey: SQLite error: " + str(ex))
def addContentKey(self, timeSlot, key):
"""
Add key as the content key for the hour covering timeSlot.
:param float timeSlot: The time slot as milliseconds since Jan 1,
1970 UTC.
:param Blob key: The encoded key.
:raises ProducerDb.Error: If a key for the same hour already exists in
the database, or other database error.
"""
fixedTimeSlot = ProducerDb.getFixedTimeSlot(timeSlot)
try:
cursor = self._database.cursor()
cursor.execute(
"INSERT INTO contentkeys (timeslot, key) values (?, ?)",
(fixedTimeSlot, sqlite3.Binary(bytearray(key.buf()))))
self._database.commit()
cursor.close()
except Exception as ex:
raise ProducerDb.Error(
"Sqlite3ProducerDb.addContentKey: SQLite error: " + str(ex))
