public DeltaSession(Manager manager) 
{
    // ----------------------------------------------------------- Constructors
        super();
        this.manager = manager;
        this.resetDeltaRequest();
}

Construct a new Session associated with the specified Manager.

Parameters:

manager - The manager with which this Session is associated

 public  void access() 
{
        this.lastAccessedTime = this.thisAccessedTime;
        this.thisAccessedTime = System.currentTimeMillis();
        evaluateIfValid();
        accessCount++;
}

Update the accessed time information for this session. This method should be called by the context when a request comes in for a particular session, even if the application does not reference it.

 public  void addSessionListener(SessionListener listener) 
{
        synchronized (listeners) {
            listeners.add(listener);
        }
}

Add a session event listener to this component.

 public  void endAccess() 
{
        isNew = false;
        accessCount--;
}

 public  void expire() 
{
        expire(true);
}

Perform the internal processing required to invalidate this session, without triggering an exception if the session has already expired.

 public  void expire(boolean notify) 
{
        expire(notify, true);
}

Perform the internal processing required to invalidate this session, without triggering an exception if the session has already expired.

 public  void expire(boolean notify,
    boolean notifyCluster) 
{
        // Mark this session as "being expired" if needed
        if (expiring)
            return;
        String expiredId = getIdInternal();
        synchronized (this) {
            if (manager == null)
                return;
            expiring = true;
            // Notify interested application event listeners
            // FIXME - Assumes we call listeners in reverse order
            Context context = (Context) manager.getContainer();
            //fix for standalone manager without container
            if (context != null) {
                Object listeners[] = context.getApplicationLifecycleListeners();
                if (notify && (listeners != null)) {
                    HttpSessionEvent event = new HttpSessionEvent(getSession());
                    for (int i = 0; i <  listeners.length; i++) {
                        int j = (listeners.length - 1) - i;
                        if (!(listeners[j] instanceof HttpSessionListener))
                            continue;
                        HttpSessionListener listener = (HttpSessionListener) listeners[j];
                        try {
                            fireContainerEvent(context,
                                    "beforeSessionDestroyed", listener);
                            listener.sessionDestroyed(event);
                            fireContainerEvent(context,
                                    "afterSessionDestroyed", listener);
                        } catch (Throwable t) {
                            try {
                                fireContainerEvent(context,
                                        "afterSessionDestroyed", listener);
                            } catch (Exception e) {
                                ;
                            }
                            // FIXME - should we do anything besides log these?
                            log.error(sm
                                    .getString("standardSession.sessionEvent"),
                                    t);
                        }
                    }
                }
            }//end if
            //end fix
            accessCount = 0;
            setValid(false);
            // Remove this session from our manager's active sessions
            if (manager != null)
                manager.remove(this);
            // Notify interested session event listeners
            if (notify) {
                fireSessionEvent(Session.SESSION_DESTROYED_EVENT, null);
            }
            // We have completed expire of this session
            expiring = false;
            // Unbind any objects associated with this session
            String keys[] = keys();
            for (int i = 0; i <  keys.length; i++)
                removeAttributeInternal(keys[i], notify, false);
            if (notifyCluster) {
                if (log.isDebugEnabled())
                    log.debug(smp.getString("deltaSession.notifying",
                            ((DeltaManager) manager).getName(), new Boolean(
                                    isPrimarySession()), expiredId));
                ((DeltaManager) manager).sessionExpired(expiredId);
            }
        }
}

 public  void fireSessionEvent(String type,
    Object data) 
{
        if (listeners.size() <  1)
            return;
        SessionEvent event = new SessionEvent(this, type, data);
        SessionListener list[] = new SessionListener[0];
        synchronized (listeners) {
            list = (SessionListener[]) listeners.toArray(list);
        }
        for (int i = 0; i <  list.length; i++) {
            ((SessionListener) list[i]).sessionEvent(event);
        }
}

Notify all session event listeners that a particular event has occurred for this Session. The default implementation performs this notification synchronously using the calling thread.

 protected int getAccessCount() 
{
        return accessCount;
}

 public Object getAttribute(String name) 
{
        if (!isValid())
            throw new IllegalStateException(sm
                    .getString("standardSession.getAttribute.ise"));
        return (attributes.get(name));
}

Return the object bound with the specified name in this session, or null if no object is bound with that name.

 protected Object getAttributeInternal(String name) 
{
        return (attributes.get(name));
}

Return the value of an attribute without a check for validity.

 public Enumeration getAttributeNames() 
{
        if (!isValid())
            throw new IllegalStateException(sm
                    .getString("standardSession.getAttributeNames.ise"));
        return (new Enumerator(attributes.keySet(), true));
}

Return an Enumeration of String objects containing the names of the objects bound to this session.

 public String getAuthType() 
{
        return (this.authType);
}

Return the authentication type used to authenticate our cached Principal, if any.

 public long getCreationTime() 
{
        if (!expiring && !isValid)
            throw new IllegalStateException(sm
                    .getString("standardSession.getCreationTime.ise"));
        return (this.creationTime);
}

Return the time when this session was created, in milliseconds since midnight, January 1, 1970 GMT.

 public DeltaRequest getDeltaRequest() 
{
        if (deltaRequest == null)
            resetDeltaRequest();
        return deltaRequest;
}

 public String getId() 
{
        if ( !isValid() ) {
            throw new IllegalStateException
            (sm.getString("standardSession.getId.ise"));
        }
        return (this.id);
}

Return the session identifier for this session.

 public String getIdInternal() 
{
        return (this.id);
}

Return the session identifier for this session.

 public String getInfo() 
{
        return (info);
}

Return descriptive information about this Session implementation and the corresponding version number, in the format <description>/<version>.

 public long getLastAccessedTime() 
{
        if (!isValid) {
            throw new IllegalStateException(sm
                    .getString("standardSession.getLastAccessedTime"));
        }
        return (this.lastAccessedTime);
}

Return the last time the client sent a request associated with this session, as the number of milliseconds since midnight, January 1, 1970 GMT. Actions that your application takes, such as getting or setting a value associated with the session, do not affect the access time.

 protected long getLastTimeReplicated() 
{
        return lastTimeReplicated;
}

 public Manager getManager() 
{
        return (this.manager);
}

Return the Manager within which this Session is valid.

 public int getMaxInactiveInterval() 
{
        return (this.maxInactiveInterval);
}

Return the maximum time interval, in seconds, between client requests before the servlet container will invalidate the session. A negative time indicates that the session should never time out.

 public Object getNote(String name) 
{
            return (notes.get(name));
}

Return the object bound with the specified name to the internal notes for this session, or null if no such binding exists.

 public Iterator getNoteNames() 
{
            return (notes.keySet().iterator());
}

Return an Iterator containing the String names of all notes bindings that exist for this session.

 public Principal getPrincipal() 
{
        return (this.principal);
}

Return the authenticated Principal that is associated with this Session. This provides an Authenticator with a means to cache a previously authenticated Principal, and avoid potentially expensive Realm.authenticate() calls on every request. If there is no current associated Principal, return null.

 public ServletContext getServletContext() 
{
        if (manager == null)
            return (null);
        Context context = (Context) manager.getContainer();
        if (context == null)
            return (null);
        else
            return (context.getServletContext());
}

Return the ServletContext to which this session belongs.

 public HttpSession getSession() 
{
        if (facade == null) {
            if (System.getSecurityManager() != null) {
                final DeltaSession fsession = this;
                facade = (DeltaSessionFacade) AccessController
                        .doPrivileged(new PrivilegedAction() {
                            public Object run() {
                                return new DeltaSessionFacade(fsession);
                            }
                        });
            } else {
                facade = new DeltaSessionFacade(this);
            }
        }
        return (facade);
}

Return the HttpSession for which this object is the facade.

 public HttpSessionContext getSessionContext() 
{
        if (sessionContext == null)
            sessionContext = new StandardSessionContext();
        return (sessionContext);
}

Return the session context with which this session is associated.

 public Object getValue(String name) 
{
        return (getAttribute(name));
}

Return the object bound with the specified name in this session, or null if no object is bound with that name.

 public String[] getValueNames() 
{
        if (!isValid())
            throw new IllegalStateException(sm
                    .getString("standardSession.getValueNames.ise"));
        return (keys());
}

Return the set of names of objects bound to this session. If there are no such objects, a zero-length array is returned.

 public  void invalidate() 
{
        if (!isValid())
            throw new IllegalStateException(sm
                    .getString("standardSession.invalidate.ise"));
        // Cause this session to expire
        expire();
}

Invalidates this session and unbinds any objects bound to it.

 public boolean isNew() 
{
        if (!isValid())
            throw new IllegalStateException(sm
                    .getString("standardSession.isNew.ise"));
        return (this.isNew);
}

Return true if the client does not yet know about the session, or if the client chooses not to join the session. For example, if the server used only cookie-based sessions, and the client has disabled the use of cookies, then a session would be new on each request.

 public boolean isPrimarySession() 
{
        return isPrimarySession;
}

returns true if this session is the primary session, if that is the case, the manager can expire it upon timeout.

 public boolean isValid() 
{
        if (this.expiring) {
            return true;
        }
        if (!this.isValid) {
            return false;
        }
        if (accessCount  > 0) {
            return true;
        }
        if (maxInactiveInterval  >= 0) {
            long timeNow = System.currentTimeMillis();
            int timeIdle = (int) ((timeNow - lastAccessedTime) / 1000L);
            if (isPrimarySession()) {
                if(timeIdle  >= maxInactiveInterval) {
                    expire(true);
                }
            } else {
                if (timeIdle  >= (2 * maxInactiveInterval)) {
                //if the session has been idle twice as long as allowed,
                //the primary session has probably crashed, and no other
                //requests are coming in. that is why we do this. otherwise
                //we would have a memory leak
                    expire(true, false);
                }
            }
        }
        return (this.isValid);
}

Return the isValid flag for this session.

 protected String[] keys() 
{
        return ((String[]) attributes.keySet().toArray(EMPTY_ARRAY));
}

Return the names of all currently defined session attributes as an array of Strings. If there are no defined attributes, a zero-length array is returned.

 public  void putValue(String name,
    Object value) 
{
        setAttribute(name, value);
}

Bind an object to this session, using the specified name. If an object of the same name is already bound to this session, the object is replaced.

After this method executes, and if the object implements HttpSessionBindingListener, the container calls valueBound() on the object.

 public  void readObjectData(ObjectInputStream stream) throws IOException, ClassNotFoundException 
{
        readObject(stream);
}

Read a serialized version of the contents of this session object from the specified object input stream, without requiring that the StandardSession itself have been serialized.

 public  void recycle() 
{
        // Reset the instance variables associated with this Session
        attributes.clear();
        setAuthType(null);
        creationTime = 0L;
        expiring = false;
        id = null;
        lastAccessedTime = 0L;
        maxInactiveInterval = -1;
        accessCount = 0;
        notes.clear();
        setPrincipal(null);
        isNew = false;
        isValid = false;
        manager = null;
        deltaRequest.clear();
}

Release all object references, and initialize instance variables, in preparation for reuse of this object.

 public  void removeAttribute(String name) 
{
        removeAttribute(name, true);
}

Remove the object bound with the specified name from this session. If the session does not have an object bound with this name, this method does nothing.

After this method executes, and if the object implements HttpSessionBindingListener, the container calls valueUnbound() on the object.

 public  void removeAttribute(String name,
    boolean notify) 
{
        removeAttribute(name, notify, true);
}

Remove the object bound with the specified name from this session. If the session does not have an object bound with this name, this method does nothing.

After this method executes, and if the object implements HttpSessionBindingListener, the container calls valueUnbound() on the object.

 public  void removeAttribute(String name,
    boolean notify,
    boolean addDeltaRequest) 
{
        // Validate our current state
        if (!isValid())
            throw new IllegalStateException(sm
                    .getString("standardSession.removeAttribute.ise"));
        removeAttributeInternal(name, notify, addDeltaRequest);
}

 protected  void removeAttributeInternal(String name,
    boolean notify,
    boolean addDeltaRequest) 
{
        // Remove this attribute from our collection
        Object value = attributes.remove(name);
        if (value == null)
            return;
        if (addDeltaRequest && (deltaRequest != null))
            deltaRequest.removeAttribute(name);
        // Do we need to do valueUnbound() and attributeRemoved() notification?
        if (!notify) {
            return;
        }
        // Call the valueUnbound() method if necessary
         HttpSessionBindingEvent event = null;
         if (value instanceof HttpSessionBindingListener) {
            event = new HttpSessionBindingEvent(
                (HttpSession) getSession(), name, value);
            try {
                ((HttpSessionBindingListener) value).valueUnbound(event);
            } catch (Exception x) {
                log.error(smp.getString("deltaSession.valueUnbound.ex"), x);
            }
        }
        // Notify interested application event listeners
        Context context = (Context) manager.getContainer();
        //fix for standalone manager without container
        if (context != null) {
            Object listeners[] = context.getApplicationEventListeners();
            if (listeners == null)
                return;
            for (int i = 0; i <  listeners.length; i++) {
                if (!(listeners[i] instanceof HttpSessionAttributeListener))
                    continue;
                HttpSessionAttributeListener listener = (HttpSessionAttributeListener) listeners[i];
                try {
                    fireContainerEvent(context,
                            "beforeSessionAttributeRemoved", listener);
                    if (event == null) {
                        event = new HttpSessionBindingEvent
                            (getSession(), name, value);
                    }
                    listener.attributeRemoved(event);
                    fireContainerEvent(context, "afterSessionAttributeRemoved",
                            listener);
                } catch (Throwable t) {
                    try {
                        fireContainerEvent(context,
                                "afterSessionAttributeRemoved", listener);
                    } catch (Exception e) {
                        ;
                    }
                    // FIXME - should we do anything besides log these?
                    log
                            .error(
                                    sm
                                            .getString("standardSession.attributeEvent"),
                                    t);
                }
            } //for
        }//end if
        //end fix
}

 public  void removeNote(String name) 
{
        notes.remove(name);
}

Remove any object bound to the specified name in the internal notes for this session.

 public  void removeSessionListener(SessionListener listener) 
{
        synchronized (listeners) {
            listeners.remove(listener);
        }
}

Remove a session event listener from this component.

 public  void removeValue(String name) 
{
        removeAttribute(name);
}

Remove the object bound with the specified name from this session. If the session does not have an object bound with this name, this method does nothing.

After this method executes, and if the object implements HttpSessionBindingListener, the container calls valueUnbound() on the object.

 public  void resetDeltaRequest() 
{
        if (deltaRequest == null) {
            deltaRequest = new DeltaRequest(getIdInternal(), false);
        } else {
            deltaRequest.reset();
            deltaRequest.setSessionId(getIdInternal());
        }
}

 protected  void setAccessCount(int accessCount) 
{
        this.accessCount = accessCount;
}

 public  void setAttribute(String name,
    Object value) 
{
        setAttribute(name, value, true, true);
}

Bind an object to this session, using the specified name. If an object of the same name is already bound to this session, the object is replaced.

After this method executes, and if the object implements HttpSessionBindingListener, the container calls valueBound() on the object.

 public  void setAttribute(String name,
    Object value,
    boolean notify,
    boolean addDeltaRequest) 
{
        // Name cannot be null
        if (name == null)
            throw new IllegalArgumentException(sm
                    .getString("standardSession.setAttribute.namenull"));
        // Null value is the same as removeAttribute()
        if (value == null) {
            removeAttribute(name);
            return;
        }
        // Validate our current state
        if (!isValid())
            throw new IllegalStateException(sm
                    .getString("standardSession.setAttribute.ise"));
        if (!(value instanceof java.io.Serializable)) {
            throw new IllegalArgumentException("Attribute [" + name
                    + "] is not serializable");
        }
        if (addDeltaRequest && (deltaRequest != null))
            deltaRequest.setAttribute(name, value);
        // Construct an event with the new value
        HttpSessionBindingEvent event = null;
        // Call the valueBound() method if necessary
        if (value instanceof HttpSessionBindingListener && notify) {
            // Don't call any notification if replacing with the same value
            Object oldValue = attributes.get(name);
            if (value != oldValue) {
                event = new HttpSessionBindingEvent(getSession(), name, value);
                try {
                    ((HttpSessionBindingListener) value).valueBound(event);
                } catch (Exception x) {
                    log.error(smp.getString("deltaSession.valueBound.ex"), x);
                }
            }
        }
        // Replace or add this attribute
        Object unbound = attributes.put(name, value);
        // Call the valueUnbound() method if necessary
        if ((unbound != null) && (unbound != value) && notify
                && (unbound instanceof HttpSessionBindingListener)) {
            try {
                ((HttpSessionBindingListener) unbound)
                        .valueUnbound(new HttpSessionBindingEvent(
                                (HttpSession) getSession(), name));
            } catch (Exception x) {
                log.error(smp.getString("deltaSession.valueBinding.ex"), x);
            }
        }
        //dont notify any listeners
        if (!notify)
            return;
        // Notify interested application event listeners
        Context context = (Context) manager.getContainer();
        //fix for standalone manager without container
        if (context != null) {
            Object listeners[] = context.getApplicationEventListeners();
            if (listeners == null)
                return;
            for (int i = 0; i <  listeners.length; i++) {
                if (!(listeners[i] instanceof HttpSessionAttributeListener))
                    continue;
                HttpSessionAttributeListener listener = (HttpSessionAttributeListener) listeners[i];
                try {
                    if (unbound != null) {
                        fireContainerEvent(context,
                                "beforeSessionAttributeReplaced", listener);
                        if (event == null) {
                            event = new HttpSessionBindingEvent(getSession(),
                                    name, unbound);
                        }
                        listener.attributeReplaced(event);
                        fireContainerEvent(context,
                                "afterSessionAttributeReplaced", listener);
                    } else {
                        fireContainerEvent(context,
                                "beforeSessionAttributeAdded", listener);
                        if (event == null) {
                            event = new HttpSessionBindingEvent(getSession(),
                                    name, value);
                        }
                        listener.attributeAdded(event);
                        fireContainerEvent(context,
                                "afterSessionAttributeAdded", listener);
                    }
                } catch (Throwable t) {
                    try {
                        if (unbound != null) {
                            fireContainerEvent(context,
                                    "afterSessionAttributeReplaced", listener);
                        } else {
                            fireContainerEvent(context,
                                    "afterSessionAttributeAdded", listener);
                        }
                    } catch (Exception e) {
                        ;
                    }
                    // FIXME - should we do anything besides log these?
                    log
                            .error(
                                    sm
                                            .getString("standardSession.attributeEvent"),
                                    t);
                }
            } //for
        }//end if
        //end fix
}

 public  void setAuthType(String authType) 
{
        String oldAuthType = this.authType;
        this.authType = authType;
        support.firePropertyChange("authType", oldAuthType, this.authType);
}

Set the authentication type used to authenticate our cached Principal, if any.

 public  void setCreationTime(long time) 
{
        this.creationTime = time;
        this.lastAccessedTime = time;
        this.thisAccessedTime = time;
}

Set the creation time for this session. This method is called by the Manager when an existing Session instance is reused.

 public  void setId(String id) 
{
        setIdInternal(id);
        tellNew();
}

Set the session identifier for this session.

 public  void setIdInternal(String id) 
{
        if ((this.id != null) && (manager != null))
            manager.remove(this);
        this.id = id;
        if (manager != null)
            manager.add(this);
        if ( deltaRequest == null ) resetDeltaRequest();
        else deltaRequest.setSessionId(id);
}

Set the session identifier for this session without notify listeners.

 protected  void setLastTimeReplicated(long lastTimeReplicated) 
{
        this.lastTimeReplicated = lastTimeReplicated;
}

 public  void setManager(Manager manager) 
{
        this.manager = manager;
}

Set the Manager within which this Session is valid.

 public  void setMaxInactiveInterval(int interval) 
{
        setMaxInactiveInterval(interval, true);
}

Set the maximum time interval, in seconds, between client requests before the servlet container will invalidate the session. A negative time indicates that the session should never time out.

 public  void setMaxInactiveInterval(int interval,
    boolean addDeltaRequest) 
{
        this.maxInactiveInterval = interval;
        if (isValid && interval == 0) {
            expire();
        } else {
            if (addDeltaRequest && (deltaRequest != null))
                deltaRequest.setMaxInactiveInterval(interval);
        }
}

 public  void setNew(boolean isNew) 
{
        setNew(isNew, true);
}

Set the isNew flag for this session.

 public  void setNew(boolean isNew,
    boolean addDeltaRequest) 
{
        this.isNew = isNew;
        if (addDeltaRequest && (deltaRequest != null))
            deltaRequest.setNew(isNew);
}

 public  void setNote(String name,
    Object value) 
{
        notes.put(name, value);
}

Bind an object to a specified name in the internal notes associated with this session, replacing any existing binding for this name.

 public  void setPrimarySession(boolean primarySession) 
{
        this.isPrimarySession = primarySession;
}

Sets whether this is the primary session or not.

 public  void setPrincipal(Principal principal) 
{
        setPrincipal(principal, true);
}

Set the authenticated Principal that is associated with this Session. This provides an Authenticator with a means to cache a previously authenticated Principal, and avoid potentially expensive Realm.authenticate() calls on every request.

 public  void setPrincipal(Principal principal,
    boolean addDeltaRequest) 
{
        Principal oldPrincipal = this.principal;
        this.principal = principal;
        support.firePropertyChange("principal", oldPrincipal, this.principal);
        if (addDeltaRequest && (deltaRequest != null))
            deltaRequest.setPrincipal(principal);
}

 public  void setValid(boolean isValid) 
{
        this.isValid = isValid;
}

Set the isValid flag for this session.

 public  void tellNew() 
{
        // Notify interested session event listeners
        fireSessionEvent(Session.SESSION_CREATED_EVENT, null);
        // Notify interested application event listeners
        Context context = (Context) manager.getContainer();
        //fix for standalone manager without container
        if (context != null) {
            Object listeners[] = context.getApplicationLifecycleListeners();
            if (listeners != null) {
                HttpSessionEvent event = new HttpSessionEvent(getSession());
                for (int i = 0; i <  listeners.length; i++) {
                    if (!(listeners[i] instanceof HttpSessionListener))
                        continue;
                    HttpSessionListener listener = (HttpSessionListener) listeners[i];
                    try {
                        fireContainerEvent(context, "beforeSessionCreated",
                                listener);
                        listener.sessionCreated(event);
                        fireContainerEvent(context, "afterSessionCreated",
                                listener);
                    } catch (Throwable t) {
                        try {
                            fireContainerEvent(context, "afterSessionCreated",
                                    listener);
                        } catch (Exception e) {
                            ;
                        }
                        // FIXME - should we do anything besides log these?
                        log.error(sm.getString("standardSession.sessionEvent"),
                                t);
                    }
                }
            }
        }//end if
        //end fix
}

Inform the listeners about the new session.

 public String toString() 
{
        StringBuffer sb = new StringBuffer();
        sb.append("DeltaSession[");
        sb.append(id);
        sb.append("]");
        return (sb.toString());
}

Return a string representation of this object.

 public  void writeObjectData(ObjectOutputStream stream) throws IOException 
{
        writeObject(stream);
}

Write a serialized version of the contents of this session object to the specified object output stream, without requiring that the StandardSession itself have been serialized.