/*
 * Copyright (c) 2002-2012 Alibaba Group Holding Limited.
 * All rights reserved.
 *
 * 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 com.alibaba.citrus.service.requestcontext.session;

public interface SessionModel {
    /**
     * 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<code>true</code>
     */
    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);
    }
}