10.3 Session scope

The Servlet 2.4 specification defines session scope at the Web application level. Session information can be accessed only by a single Web application. However, there can be times when there is a logical reason for multiple Web applications to share information, for example, a user name.

WAS provides an IBM extension to the specification allowing session information to be shared among Web applications within an enterprise application. This option is offered as an extension to the application deployment descriptor. No code change is necessary to enable this option. This option is specified during application assembling.

Because session information is shared within the enterprise application, you cannot use the Overwrite Session Management property at the Web module level when the IBM option for shared session context is selected.