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 // Copyright 2006, 2008 The Apache Software Foundation
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package org.apache.tapestry5.services;
Generic version of javax.servlet.http.HttpSession, used to bridge the gaps between the Servlet API and the Portlet API.
public interface Session
{
    
Returns a list of the names of all attributes stored in the session. The names are returned sorted alphabetically.
    List<StringgetAttributeNames();

    
Returns a list of the names of all attributes stored in the session whose name has the provided prefix. The names are returned in alphabetical order.
    List<StringgetAttributeNames(String prefix);

    
Returns the value previously stored in the session.
    Object getAttribute(String name);

    
Sets the value of an attribute. If the value is null, then the attribute is deleted.
    void setAttribute(String nameObject value);

    
Returns the maximum time interval, in seconds, that the servlet container will keep this session open between client accesses. After this interval, the servlet container will invalidate the session. The maximum time interval can be set with the setMaxInactiveInterval method. A negative time indicates the session should never timeout.
    int getMaxInactiveInterval();

    
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.
    void setMaxInactiveInterval(int seconds);

    
Invalidates this session then unbinds any objects bound to it.

Throws:
java.lang.IllegalStateException if this method is called on an already invalidated session
    void invalidate();

    
Checks to see if the session has been invalidated. Note: this only catches calls to invalidate(), not calls to javax.servlet.http.HttpSession.invalidate().

Since:
5.1.0.0
    boolean isInvalidated();

    
Re-stores dirty objects back into the session. This is necessary to support clustering, because (in most application servers) session objects are only broadcast around the cluster from setAttribute(). If a mutable session object is read and changed, those changes will be limited to a single server in the cluster, which can cause confusing application failures in the event of a failover. Does nothing if there are no changes, or the session has been invalidated.

    void restoreDirtyObjects();
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