Package org.zkoss.zk.ui.http

Class SimpleSession

java.lang.Object
org.zkoss.zk.ui.http.SimpleSession
All Implemented Interfaces:
Scope, Session, SessionCtrl
Direct Known Subclasses:
SerializableSession
public class SimpleSession extends Object implements Session, SessionCtrl
A non-serializable implementation of Session.

Note:
Though this class is serializable, it is meaningless to serialize it directly. Reason: it doesn't serialize any session attributes. Rather, it is serialized when Web server serialized HttpSession. Also, notice that SimpleSession is stored as an attribute HttpSession.

Author:
tomyeh

  • Constructor Details

    • SimpleSession

      public SimpleSession(WebApp wapp, jakarta.servlet.http.HttpSession hsess, Object request)
      Constructs a ZK session with a HTTP session.
      Parameters:
      hsess - the original HTTP session.
      request - the original request causing this session to be created. If HTTP and servlet, it is jakarta.servlet.http.HttpServletRequest. If portlet, it is javax.portlet.RenderRequest.
      Since:
      3.0.1

    • SimpleSession

      public SimpleSession(WebApp wapp, Object navsess, Object request)
      Constructs a ZK session with either a HTTP session or a Portlet session.

      Note: it assumes the scope of attributes is PortletSession.APPLICATION_SCOPE.

      Parameters:
      navsess - the original session, either an instance of HttpSession or PortletSession. Notice: we don't declare PortletSession in API to avoid this class failed to be loaded in some system (without portlet-api.jar)
      request - the original request causing this session to be created. If portlet, it is javax.portlet.RenderRequest.
      Since:
      3.6.2

    • SimpleSession

      protected SimpleSession()
      Used by the deriving class, only if the deriving class implements java.io.Serializable.

  • Method Details

    • getDeviceType

      public String getDeviceType()
      Description copied from interface: Session
      Returns the device type that this session belongs to.

      A device type identifies the type of a client. For example, "ajax" represents the Web browsers with Ajax support, while "mil" represents clients that supports Mobile Interactive markup Language (on Limited Connected Device, such as mobile phones).

      All desktops of the same session must belong to the same device type.

      The session's device type is determined by the first desktop's device type.

      Specified by:
      getDeviceType in interface Session

    • setDeviceType

      public void setDeviceType(String deviceType)
      Description copied from interface: SessionCtrl
      Sets the device type that this session belongs to.

      It is called by the desktop when Desktop.setDeviceType(java.lang.String) is called. Don't call this method directly. Otherwise, the result is unpredictable.

      Specified by:
      setDeviceType in interface SessionCtrl

    • getAttribute

      public Object getAttribute(String name)
      Description copied from interface: Session
      Returns the value of the specified custom attribute.
      Specified by:
      getAttribute in interface Scope
      Specified by:
      getAttribute in interface Session

    • getAttribute

      public Object getAttribute(String name, boolean recurse)
      Description copied from interface: Scope
      Returns the custom attribute associated with this object.
      Specified by:
      getAttribute in interface Scope
      recurse - whether to search its ancestor scope. If true and the current scope doen't define the attribute, it searches up its ancestor to see any of them has defined the specified attribute.

    • hasAttribute

      public boolean hasAttribute(String name)
      Description copied from interface: Scope
      Returns if a custom attribute is associated with this object (scope).

      Notice that null is a valid value, so you can tell if an attribute is associated by examining the return value of Scope.getAttribute(java.lang.String).

      Specified by:
      hasAttribute in interface Scope

    • hasAttribute

      public boolean hasAttribute(String name, boolean recurse)
      Description copied from interface: Scope
      Returns if a custom attribute is associated with this object.

      Notice that null is a valid value, so you can tell if an attribute is associated by examining the return value of Scope.getAttribute(java.lang.String).

      Specified by:
      hasAttribute in interface Scope
      recurse - whether to search its ancestor scope. If true and the current scope doen't define the attribute, it searches up its ancestor to see any of them has defined the specified attribute.

    • setAttribute

      public Object setAttribute(String name, Object value)
      Description copied from interface: Session
      Sets the value of the specified custom attribute.
      Specified by:
      setAttribute in interface Scope
      Specified by:
      setAttribute in interface Session
      Returns:
      the previous value if any (since ZK 5)

    • setAttribute

      public Object setAttribute(String name, Object value, boolean recurse)
      Description copied from interface: Scope
      Sets the custom attribute associated with this scope, or the parent scope.
      Specified by:
      setAttribute in interface Scope
      recurse - whether to look up the parent scope for the existence of the attribute.
      If recurse is true and the attribute is defined in one of its ancestor (including page), the attribute is replaced. Otherwise, it is the same as Scope.setAttribute(String,Object).

    • removeAttribute

      public Object removeAttribute(String name, boolean recurse)
      Description copied from interface: Scope
      Removes the custom attribute associated with this scope.
      Specified by:
      removeAttribute in interface Scope
      recurse - whether to look up the parent scope for the existence of the attribute.
      If recurse is true and the attribute is defined in one of its ancestor (including page), the attribute is removed. Otherwise, it is the same as Scope.removeAttribute(String).

    • removeAttribute

      public Object removeAttribute(String name)
      Description copied from interface: Session
      Removes the specified custom attribute.
      Specified by:
      removeAttribute in interface Scope
      Specified by:
      removeAttribute in interface Session
      Returns:
      the previous value if any (since ZK 5)

    • addScopeListener

      public boolean addScopeListener(ScopeListener listener)
      Description copied from interface: Scope
      Adds a listener to listen whether this scope is changed. The listener is called when a custom attribute is added, removed, or the parent is changed.
      Specified by:
      addScopeListener in interface Scope
      Returns:
      weather the listener is added successfully. Note: if the resolver was added before, it won't be added again and this method returns false.

    • removeScopeListener

      public boolean removeScopeListener(ScopeListener listener)
      Description copied from interface: Scope
      Removes a change listener from this scope.
      Specified by:
      removeScopeListener in interface Scope
      Returns:
      false if listener is not added before.

    • getAttributes

      public Map<String,Object> getAttributes()
      Description copied from interface: Session
      Returns a map of custom attributes associated with this session.
      Specified by:
      getAttributes in interface Scope
      Specified by:
      getAttributes in interface Session

    • invalidateNow

      public void invalidateNow()
      Description copied from interface: SessionCtrl
      Really invalidates the session.

      Application shall never access this method.

      Specified by:
      invalidateNow in interface SessionCtrl

    • setMaxInactiveInterval

      public void setMaxInactiveInterval(int interval)
      Description copied from interface: Session
      Specifies the time, in seconds, between client requests before the servlet container will invalidate this session. A negative time indicates the session should never timeout.
      Specified by:
      setMaxInactiveInterval in interface Session
      See Also:

    • getMaxInactiveInterval

      public int getMaxInactiveInterval()
      Description copied from interface: Session
      Return the time, in seconds, between client requests before the servlet container will invalidate this session. A negative time indicates the session should never timeout.
      Specified by:
      getMaxInactiveInterval in interface Session
      See Also:

    • getNativeSession

      public Object getNativeSession()
      Description copied from interface: Session
      Returns the native session, or null if not available. The returned object depends on the type of clients. If HTTP, the object is an instance of jakarta.servlet.http.HttpSession. If portlet, the object is an instance of javax.portlet.PortletSession.
      Specified by:
      getNativeSession in interface Session

    • notifyClientRequest

      public boolean notifyClientRequest(boolean keepAlive)
      Description copied from interface: SessionCtrl
      Notifies the session that a client request is received.
      Specified by:
      notifyClientRequest in interface SessionCtrl
      Parameters:
      keepAlive - if the request will keep the session alive, or the request shall be ignored. If the request shall be ignored and the session is timeout, it will cause the session to expire (i.e., be invalidated).
      Returns:
      whether the session is invalidated (since 6.0.0)

    • getWebApp

      public final WebApp getWebApp()
      Description copied from interface: Session
      Returns the Web application that this session belongs to.
      Specified by:
      getWebApp in interface Session

    • invalidate

      public final void invalidate()
      Description copied from interface: Session
      Invalidates this session then unbinds any objects bound to it.

      Note: you usually have to ask the client to redirect to another page (or reload the same page) by use of Executions.sendRedirect(java.lang.String).

      The session is not invalidated immediately. Rather, it is invalidated after processing the current request.

      Specified by:
      invalidate in interface Session

    • isInvalidated

      public final boolean isInvalidated()
      Description copied from interface: SessionCtrl
      Returns whether this session is invalidated (i.e., Session.invalidate() was called).

      Note: ZK doesn't invalidate it immediately (until the event has been processed), so the session might be still alive.

      Specified by:
      isInvalidated in interface SessionCtrl

    • getDesktopCache

      public DesktopCache getDesktopCache()
      Description copied from interface: SessionCtrl
      Returns the desktop cache, or null if not available.

      Note: this is an utility to implement DesktopCacheProvider, which might or might not use this method. Other part of ZK shall not access this method.

      Specified by:
      getDesktopCache in interface SessionCtrl

    • setDesktopCache

      public void setDesktopCache(DesktopCache cache)
      Description copied from interface: SessionCtrl
      Sets the desktop cache.

      Note: this is an utility to implement DesktopCacheProvider, which might or might not use this method. Other part of ZK shall not access this method.

      Specified by:
      setDesktopCache in interface SessionCtrl
      Parameters:
      cache - the desktop cache; null to denote no cache available.

    • recover

      public void recover(Object nativeSession)
      Description copied from interface: SessionCtrl
      Called when ZK detects Session.getNativeSession() is not initialized properly.

      It is actually a workaround to solve the issue that some Web container fails to call HttpSessionActivationListener.sessionDidActivate() upon failover.

      It can be used to solve the issue that the mapping between the native session and the ZK session is changed. For example, you might manually invalidate the http session and recreate one. Then, you have to call this method to associate the ZK session with the new created session.

      Specified by:
      recover in interface SessionCtrl

    • onDestroyed

      public void onDestroyed()
      Description copied from interface: SessionCtrl
      Called when the session is destroyed.

      Application shall never access this method.

      Specified by:
      onDestroyed in interface SessionCtrl

    • writeThis

      protected void writeThis(ObjectOutputStream s) throws IOException
      Used by the deriving class to write this object, only if the deriving class implements java.io.Serializable.
      Throws:
      IOException

    • readThis

      protected void readThis(ObjectInputStream s) throws IOException, ClassNotFoundException
      Used by the deriving class to read back this object, only if the deriving class implements java.io.Serializable.
      Throws:
      IOException
      ClassNotFoundException

    • sessionWillPassivate

      protected void sessionWillPassivate()
      Used by the deriving class to pre-process a session before writing the session

    • sessionDidActivate

      protected void sessionDidActivate(jakarta.servlet.http.HttpSession hsess)
      Used by the deriving class to post-process a session after it is read back.

      Application shall not call this method directly.