Disables the session validation job.
Enables the session validation job.
Returns <code>true</code> if this Scheduler is enabled and ready to begin validation at the appropriate time, <code>false</code> otherwise. <p/> It does <em>not</em> indicate if the validation is actually executing at that instant - only that it is prepared to do so at the appropriate time.
Interface that should be implemented by classes that can control validating sessions on a regular basis. This interface is used as a delegate for session validation by the {@link hunt.shiro.session.mgt.DefaultSessionManager}
@see hunt.shiro.session.mgt.DefaultSessionManager#setSessionValidationScheduler(SessionValidationScheduler)