user manual

Chapter 6: Java Session Service (JSS) configuration 63
Chapter
6
Chapter 6Java Session Service (JSS)
configuration
The Java Session Service (JSS) is a service that stores information pertaining
to a specific user session. JSS is used to store session information for
recovery in case of container failure.
Borland provides an Interface Definition Language (IDL) interface for the use
of JSS. Two implementations are bundled, one using DataExpress and
another with any JDBC capable database.
JSS provides a mechanism to easily store session information in a database.
For example, in a shopping cart scenario, information about your session (the
number of items in the shopping cart, and such) is stored by the JSS. So, if a
session is interrupted by a Borland web container unexpectedly going down,
the session information is recoverable by another Borland web container
instance through the JSS. The JSS must be running on the local network. Any
web container (within the cluster configuration) finds the JSS and connects to
it and continues session management.
For more information about the Borland web container, go Chapter 4, “Web
components”.
Session management with JSS
The following diagrams show typical landscapes of web components and how
session information is managed by the JSS. The JSS session management is
completely transparent to the client.