TGT、ST資料共享

多臺CAS伺服器共享TGT、ST資料，由於TGT、ST資料沒有儲存到SESSION中，所以需要單獨處理TGT、ST資料的共享。可採用的方式有多種，例如：redis、memcached等NOSQL資料庫，登入量小的可以選擇關係型資料庫等。
Redis：

1、繼承AbstractDistributedTicketRegistry類，重寫ticket的增刪改查方法

import java.util.Collection;

import org.apache.commons.lang.SerializationUtils;
import org.jasig.cas.ticket.Ticket;
import org.jasig.cas.ticket.TicketGrantingTicket;
import org.jasig.cas.ticket.registry.AbstractDistributedTicketRegistry;

import redis.clients.jedis.Jedis;

public class RedisTicketRegistry extends AbstractDistributedTicketRegistry {
	//st ticket 最大空閒時間
	private int stMaxFreeTime;
	//tgt ticket 最大空閒時間
	private int tgtMaxFreeTime;
	private static Jedis jedis = new Jedis("localhost");
	
	/**
	 * 新增票據
	 * Description 
	 * @param ticket 
	 * @see org.jasig.cas.ticket.registry.TicketRegistry#addTicket(org.jasig.cas.ticket.Ticket)
	 */
	@Override
	public void addTicket(Ticket ticket) {
		// TODO Auto-generated method stub
		String key = ticket.getId();
		int seconds = 0; 
		if(ticket instanceof TicketGrantingTicket){
			seconds = this.getTgtMaxFreeTime();
		} else {
			seconds = this.getStMaxFreeTime();
		}
		System.out.println("---------------add Tikcet into redis-------------------  start");
		jedis.setex(SerializationUtils.serialize(key), seconds, SerializationUtils.serialize(ticket));
		System.out.println("---------------add Ticket into redis-------------------  end");
	}

	/**
	 * 刪除票據
	 * Description 
	 * @param ticketId
	 * @return 
	 * @see org.jasig.cas.ticket.registry.TicketRegistry#deleteTicket(java.lang.String)
	 */
	@Override
	public boolean deleteTicket(String ticketId) {
		// TODO Auto-generated method stub
		if(ticketId==null){
			return false;
		}
		System.out.println("----------------delete Ticket from redis-------------- start");
		jedis.del(SerializationUtils.serialize(ticketId));
		System.out.println("----------------delete Ticket from redis-------------- end");
		return true;
	}

	/**
	 * 獲取票據
	 * Description 
	 * @param ticketId
	 * @return 
	 * @see org.jasig.cas.ticket.registry.TicketRegistry#getTicket(java.lang.String)
	 */
	@Override
	public Ticket getTicket(String ticketId) {
		// TODO Auto-generated method stub
		System.out.println("---------------get Ticket byte[] ---------------- start");
		byte []tempArr = jedis.get(SerializationUtils.serialize(ticketId));
		Ticket ticket = null;
		if(tempArr!=null){
			System.out.println("--------------------deserialize to Ticket--------------- start");
			ticket = (Ticket) SerializationUtils.deserialize(tempArr);
		}
		System.out.println("-----------------get Tikcet -------------------- end");
		return ticket;
	}

	
	@Override
	public Collection<Ticket> getTickets() {
		// TODO Auto-generated method stub
		throw new UnsupportedOperationException("----------GetTickets not supported----------------"); 
	}

	@Override
	public boolean needsCallback() {
		// TODO Auto-generated method stub
		return false;
	}

	/**
	 * 修改票據
	 * Description 
	 * @param ticket 
	 * @see org.jasig.cas.ticket.registry.AbstractDistributedTicketRegistry#updateTicket(org.jasig.cas.ticket.Ticket)
	 */
	@Override
	public void updateTicket(Ticket ticket) {
		// TODO Auto-generated method stub
		this.addTicket(ticket);
	}

	/**
	 * @return the stMaxFreeTime
	 */
	public int getStMaxFreeTime() {
		return stMaxFreeTime;
	}

	/**
	 * @param stMaxFreeTime the stMaxFreeTime to set
	 */
	public void setStMaxFreeTime(int stMaxFreeTime) {
		this.stMaxFreeTime = stMaxFreeTime;
	}

	/**
	 * @return the tgtMaxFreeTime
	 */
	public int getTgtMaxFreeTime() {
		return tgtMaxFreeTime;
	}

	/**
	 * @param tgtMaxFreeTime the tgtMaxFreeTime to set
	 */
	public void setTgtMaxFreeTime(int tgtMaxFreeTime) {
		this.tgtMaxFreeTime = tgtMaxFreeTime;
	}
	
}
 

2、修改spring-configuration/ticketRegistry.xml，去掉以前的ticketRegistry，改成自己的

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:p="http://www.springframework.org/schema/p"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
    <description>
    	Configuration for the default TicketRegistry which stores the tickets in-memory and cleans them out as specified intervals.
    </description>
       
  
	<bean id="ticketRegistry" class="ths.jdp.cas.extend.RedisTicketRegistry"
		p:stMaxFreeTime="3600"  
		p:tgtMaxFreeTime="3600"  
	/>
</beans>
 

3、cas/WEB-INF/lib/下增加jedis-2.9.0.jar，如果Tomcat採用的redis session共享，Tomcat/lib已存在jedis相關jar

4、CentralAuthenticationServiceImpl類315行增加下圖中所示程式碼，解決Cas叢集時登出bug

 314 final ServiceTicket serviceTicket = ticketGrantingTicket.grantServiceTicket(generatedServiceTicketId, service,
                this.serviceTicketExpirationPolicy, credentials != null);
 315   this.serviceTicketRegistry.addTicket(ticketGrantingTicket);
 316  this.serviceTicketRegistry.addTicket(serviceTicket);