Shiro AbstractSessionManager的设计概念

最抽象功能也最基础的Session管理器，只包含了存取Session的过期时间

package org.apache.shiro.session.mgt;

import org.apache.shiro.session.Session;

public abstract class AbstractSessionManager implements SessionManager {

    protected static final long MILLIS_PER_SECOND = 1000;
    protected static final long MILLIS_PER_MINUTE = 60 * MILLIS_PER_SECOND;
    protected static final long MILLIS_PER_HOUR = 60 * MILLIS_PER_MINUTE;

    /**
     * Default main session timeout value, equal to {@code 30} minutes.
     */
    public static final long DEFAULT_GLOBAL_SESSION_TIMEOUT = 30 * MILLIS_PER_MINUTE;

    private long globalSessionTimeout = DEFAULT_GLOBAL_SESSION_TIMEOUT;

    public AbstractSessionManager() {
    }
  
    public long getGlobalSessionTimeout() {
        return this.globalSessionTimeout;
    }

    public void setGlobalSessionTimeout(long globalSessionTimeout) {
        this.globalSessionTimeout = globalSessionTimeout;
    }
}