Tomcat starts from scratch (12) the first part of the Session

public interface Session {        public static final String SESSION_CREATED_EVENT = "createSession";        public static final String SESSION_DESTROYED_EVENT = "destroySession";        public String getAuthType();        public void setAuthType(String authType);        public long getCreationTime();        public void setCreationTime(long time);        public String getId();        public void setId(String id);        public String getInfo();        public long getLastAccessedTime();        public Manager getManager();        public void setManager(Manager manager);        public int getMaxInactiveInterval();        public void setMaxInactiveInterval(int interval);        public void setNew(boolean isNew);        public Principal getPrincipal();        public void setPrincipal(Principal principal);        public HttpSession getSession();        public void setValid(boolean isValid);        public boolean isValid();        public void access();        public void addSessionListener(SessionListener listener);        public void expire();        public Object getNote(String name);        public Iterator getNoteNames();        public void recycle();        public void removeNote(String name);        public void removeSessionListener(SessionListener listener);        public void setNote(String name, Object value);}

 

(2) Delete the session from the manager.
(3) Delete the data stored in the session
(4) Check the parameters to determine whether to trigger some events.