$db public property The DB connection object or the application

createIndex() public method Creates an index on the collection

sum() public method Returns the sum of the specified column

__unset() public method PHP magic method, which is invoked

delete() public method Removes documents from the collection

stream_tell() public method Retrieve the current position

getCollection() public static method Return the Mongo

init() public method Initializes the Session component

dropCollection() public method Generates drop collection

batchInsert() public method Inserts batch of new documents