Typically, a default inactivity lease period for all sessions is set within your JSPengine admin screen or associated properties file. However, if your JSP engine supports the Servlet 2.1 API, you can manage the inactivity lease period on a per-session basis.This is done by invoking the HttpSession.setMaxInactiveInterval() method, right after the session has been created.

In advanced Java, particularly in the context of distributed systems or remote method invocation (RMI), there isn’t a built-in mechanism to set the inactivity lease period on a per-session basis. The inactivity lease period typically applies to the entire distributed object or remote service, rather than individual client sessions.

The inactivity lease period is a concept used in RMI to determine how long a client can be inactive (i.e., not invoking remote methods) before the lease on its remote reference expires. If the lease expires, the distributed object may be garbage-collected or released.

However, if you want to implement a custom solution for managing inactivity on a per-session basis, you could potentially design your own mechanism. This might involve keeping track of session activity timestamps and implementing a logic to expire sessions based on your specific requirements.

It’s worth noting that newer technologies and frameworks might offer more sophisticated session management capabilities. If you’re working with web applications, for example, frameworks like Spring provide robust session management features that you can leverage for handling inactivity at a higher level.

In summary, for standard RMI and basic Java, there isn’t a direct way to set the inactivity lease period on a per-session basis. If you need this level of customization, you may need to implement your own solution or explore frameworks that offer more advanced session management features.