multitimeuseortimeoutexpirationpolicy.java

来自「CAS在Tomcat中实现单点登录项目,单点登录（Single Sign On 」· Java 代码 · 共 43 行

/*
 * Copyright 2007 The JA-SIG Collaborative. All rights reserved. See license
 * distributed with this file and available online at
 * http://www.ja-sig.org/products/cas/overview/license/
 */
package org.jasig.cas.ticket.support;

import org.jasig.cas.ticket.ExpirationPolicy;
import org.jasig.cas.ticket.TicketState;

/**
 * ExpirationPolicy that is based on certain number of uses of a ticket or a
 * certain time period for a ticket to exist.
 * 
 * @author Scott Battaglia
 * @version $Revision: 42053 $ $Date: 2007-06-10 09:17:55 -0400 (Sun, 10 Jun 2007) $
 * @since 3.0
 */
public final class MultiTimeUseOrTimeoutExpirationPolicy implements
    ExpirationPolicy {

    /** Serializable Unique ID. */
    private static final long serialVersionUID = 3257844372614558261L;

    /** The time to kill in millseconds. */
    private final long timeToKillInMilliSeconds;

    /** The maximum number of uses before expiration. */
    private final int numberOfUses;

    public MultiTimeUseOrTimeoutExpirationPolicy(final int numberOfUses,
        final long timeToKillInMilliSeconds) {
        this.timeToKillInMilliSeconds = timeToKillInMilliSeconds;
        this.numberOfUses = numberOfUses;
    }

    public boolean isExpired(final TicketState ticketState) {
        return (ticketState == null)
            || (ticketState.getCountOfUses() >= this.numberOfUses)
            || (System.currentTimeMillis() - ticketState.getLastTimeUsed() >= this.timeToKillInMilliSeconds);
    }
}