Java中的Redis事务

一次简单的事务执行

• package cn.e3mall.common.RedisText;
  
  import redis.clients.jedis.Jedis;
  import redis.clients.jedis.Transaction;
  
  /**
   * @author Mr.Li
   * @version 1.0
   * @Description:
   * @Modified By:
   * @date 2019/1/29 13:07
   */
  public class TextTX {
  
      public static void main(String[] args) {
  
          Jedis jedis=new Jedis("127.0.0.1",6379);
  
          Transaction transaction = jedis.multi();
          transaction.set("k5","v5");
          transaction.set("k6","v6");
          transaction.set("k7","v7");
  
          /**
           * 执行下面命令运行事务块
           * transaction.exec();
           */
  
          /**
           * 取消事务，放弃执行事务块内的所有命令
           * transaction.discard();
           */
      }
  }
  

   

购买物品的事务执行 

• package cn.e3mall.common.RedisText;
  
  import redis.clients.jedis.Jedis;
  import redis.clients.jedis.Transaction;
  
  /**
   * @author Mr.Li
   * @version 1.0
   * @Description:
   * @Modified By:
   * @date 2019/1/29 13:07
   */
  public class TextTX {
  
      public static void main(String[] args) {
  
          TextTX test=new TextTX();
          boolean retValue=test.transMethod();
          System.out.println("main retValue----------:"+retValue);
  
      }
  
      private boolean transMethod() {
          Jedis jedis = new Jedis("127.0.0.1", 6379);
  
          int balance;                //可用余额
          int debt;                   //欠费
          int amtToSubtract = 10;     //实刷额度
  
          jedis.watch("balance");
  
          balance = Integer.parseInt(jedis.get("balance"));
          //如果可用余额小于实刷额度
          if (balance < amtToSubtract) {
              jedis.unwatch();
              System.out.println("modify");
              return false;
          } else {
              System.out.println("******开启事务******");
              Transaction transaction=jedis.multi();
              transaction.decrBy("balacne",amtToSubtract);
              transaction.incrBy("debt",amtToSubtract);
              transaction.exec();
              balance = Integer.parseInt(jedis.get("balance"));
              debt = Integer.parseInt(jedis.get("debt"));
  
              System.out.println("可用余额" + balance);
              System.out.println("欠费" + debt);
              return true;
          }
      }
  }