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State | Meaning |
|---|---|
Invalid | The session key used to identify the session is not provided, or it does not match any session key the server knows about. |
Expired | The session key identifies a valid session, however the previous request from the same session has exceeded the SessionTimeout period. |
Active | The session key identifies a known valid session and the last request from the same server was within the SessionTimeout period. |
None | Used declaratively at design time to denote WEBROUTINEs that can execute without a valid session context. If SessionStatus is set to Active at WAM level, you must have at least one WEBROUTINE with OnEntry(*SessionStatus_None) keyword to allow entry to the WAM application to create a new session, via this WEBROUTINE. |
Conceptually invalid or expired sessions are treated the same. They are both session statuses that prevent execution of WEBROUTINEs that require a valid session context (i.e. WEBROUTINEs with a SessionStatus property set to Active).
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When a session has expired, session state is not deleted from the session database immediately. This technique is used to reduce load on the server at peak times. The Transaction Monitor performs periodic cleanup of expired session states. It is also possible to turn off periodic cleanup and schedule cleanup to be performed at designated off-peak times.