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/**
 *  Copyright (c) 1997-2013, www.tinygroup.org ([email protected]).
 *
 *  Licensed under the GPL, Version 3.0 (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.gnu.org/licenses/gpl.html
 *
 *  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.tinygroup.weblayer.webcontext.session;

import java.io.Serializable;

/**
 * 描述session模型的接口
 * @author renhui
 *
 */
public interface SessionModel extends Serializable {
    /**
     * 取得session ID。
     *
     * @return session ID
     */
    String getSessionID();

    /**
     * 取得session的创建时间。
     *
     * @return 创建时间戮
     */
    long getCreationTime();

    /**
     * 取得最近访问时间。
     *
     * @return 最近访问时间戮
     */
    long getLastAccessedTime();

    /**
     * 取得session的最大不活动期限，超过此时间，session就会失效。
     *
     * @return 不活动期限的秒数
     */
    int getMaxInactiveInterval();

    /**
     * 判断session有没有过期。
     *
     * @return 如果过期了，则返回true
     */
    boolean isExpired();

    /** 用来创建session model实例的工厂。 */
    interface Factory {
        SessionModel newInstance(String sessionID, long creationTime, long lastAccessedTime, int maxInactiveInterval);
    }
}