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Developing AppServer Applications
AppServer and Client Interaction : Session models and application services : Choosing a session model : Session-managed model
Session-managed model
The session-managed model is specifically designed for application services or Web services that support a single transaction across multiple requests from the same client, returning intermediate results with each request until the transaction is completed. Thus, the AppServer maintains context between requests for each client that it services, and each such client participates in a persistent connection to the AppServer. The connected AppServer is dedicated to serving that one client until the connection between them is terminated.
In this session model, all client requests are single-threaded, meaning that the AppServer does not handle another request from the same client until it has completed and responded to any pending request from that client.