Returns all attribute keys maintained by the target session or an empty collection if there are no attributes.
@param sessionKey the session key to use to look up the target session.
@return all attribute keys maintained by the target session or an empty collection if there are no attributes.
@throws InvalidSessionException if the associated session has stopped or expired prior to calling this method.
@see hunt.shiro.session.Session#getAttributeKeys()
Returns all attribute keys maintained by the target session or an empty collection if there are no attributes.
@param sessionKey the session key to use to look up the target session. @return all attribute keys maintained by the target session or an empty collection if there are no attributes. @throws InvalidSessionException if the associated session has stopped or expired prior to calling this method. @see hunt.shiro.session.Session#getAttributeKeys()