Sessions

Sessions are the key operation of FirstBatch. Each visitor to your app creates a session through FirstBatch SDK.

Sessions are required for FirstBatch to operate.

There are two types of sessions

• Temporary: Session is destroyed within 1 hour, Id created randomly by FirstBatch

session = personalized.session(
                algorithm=AlgorithmLabel.SIMPLE, 
                vdbid="my_db"
                )

• Persistent: Session is persistent, id is given by the user

session = personalized.session(
                session_id="newid",
                algorithm=AlgorithmLabel.SIMPLE, 
                vdbid="my_db"
                )

Stateless

FirstBatch manages sessions for you. An algorithm has multiple states and each session can be at a different state of the same algorithm or even a different algorithm. This design is to make it easy to integrate a stateless backend with FirstBatch and reduce development complexity.

Attributes

A session consists of:

• ID -> session ID

• Algorithm -> Type AlgorithmLabel

• State -> State of the algorithm

• User Embeddings -> List of vectors and their corresponding weights

Each type of Signal and Batch action updates the session state with the FirstBatch SDK.