Redis的事務操作

1. multi 開啟事務
2. exec 提交事務
3. discard取消事務

127.0.0.1:6379> multi 
OK
127.0.0.1:6379> set djk fdjs
QUEUED
127.0.0.1:6379> set djklg djgl
QUEUED
127.0.0.1:6379> discard
OK
127.0.0.1:6379> exec
(error) ERR EXEC without MULTI

4 watch監聽key值

watch: 在事務開啟之前監聽一個或多個keys值，如果在事務執行時，客戶端進行修改該值，那麼事務都不執行。

127.0.0.1:6379> watch hello
OK
127.0.0.1:6379> multi
OK
127.0.0.1:6379> set hello ffff
QUEUED
127.0.0.1:6379> set name zll
QUEUED
127.0.0.1:6379> exec
(nil)

Jedis例項

public class JedisTransaction {
    private Jedis jedis;
    @Before
    public void beforeJedis(){
        jedis = JedisConnection.jedisConnection();
    }
    @Test
    public
 
 void testTransaction(){
        //事務一旦執行，客戶端發來的請求都不能打斷。
        //開啟一個事務
        Transaction transaction = jedis.multi();
        transaction.set("hello", "world!");
        transaction.mset("hashset_keys","nnnn");
        transaction.lpush("list_key","hhhh");
        transaction.lpush("list_key","xxx"
 
);
        transaction.exec();
        System.out.println("=="+jedis.keys("*"));
    }
    @Test
    public void testWatch(){
        jedis.watch("name");
        Transaction transaction = jedis.multi();
        transaction.set("hello", "world!");
        //此時用客戶端，對name進行修改操作。
        transaction.mset("name","tttt");
        transaction.lpush("age","444");
        System.out.println(transaction.exec());
    }
    @Test
    public void testDiscard(){
        Transaction transaction = jedis.multi();
        transaction.set("hello", "world!");
        //取消事務
        System.out.println(transaction.discard());
    }
}