redis的事务

1.正常的事务

127.0.0.1:6379> set name aaa
OK
127.0.0.1:6379> get name
"aaa"
127.0.0.1:6379> multi
OK
127.0.0.1:6379> set name bbb
QUEUED
127.0.0.1:6379> get name
QUEUED
127.0.0.1:6379> exec
1) OK
2) "bbb"
127.0.0.1:6379> get name
"bbb"

2.数据类型有错的事务

127.0.0.1:6379> get name
"bbb"
127.0.0.1:6379> multi
OK
127.0.0.1:6379> set name ccc
QUEUED
127.0.0.1:6379> get name
QUEUED
127.0.0.1:6379> lpush name 1 2
QUEUED
127.0.0.1:6379> exec
1) OK
2) "ccc"
3) (error) WRONGTYPE Operation against a key holding the wrong kind of value
127.0.0.1:6379> get name
"ccc"

3.命令有错的事务

127.0.0.1:6379> get name
"ccc"
127.0.0.1:6379> multi
OK
127.0.0.1:6379> set name ddd
QUEUED
127.0.0.1:6379> get name
QUEUED
127.0.0.1:6379> tttt name
(error) ERR unknown command `tttt`, with args beginning with: `name`,
127.0.0.1:6379> exec
(error) EXECABORT Transaction discarded because of previous errors.
127.0.0.1:6379> get name
"ccc"

4.锁

客户端A

①
127.0.0.1:6379> get count
"100"
127.0.0.1:6379> watch count
OK
127.0.0.1:6379> multi
OK
127.0.0.1:6379> set name aaa
QUEUED
127.0.0.1:6379> get name
QUEUED
③
127.0.0.1:6379> exec
(nil)
127.0.0.1:6379> get count
"1000"
127.0.0.1:6379> get name
"ddd"

客户端B

②
127.0.0.1:6379> set count 1000
OK

5.解锁

客户端A

①
127.0.0.1:6379> setnx lock-age 18
(integer) 1
127.0.0.1:6379> setnx lock-age 20
(integer) 0
③
127.0.0.1:6379> del lock-age
(integer) 1

客户端B

②
127.0.0.1:6379> setnx lock-age 20
(integer) 0
127.0.0.1:6379> get lock-age
"18"
④
127.0.0.1:6379> get lock-age
(nil)
127.0.0.1:6379> set lock-age 21
OK

6.定时锁

客户端A

①
127.0.0.1:6379> setnx lock-age 18
(integer) 1
127.0.0.1:6379> expire lock-age 60
(integer) 1

客户端B

②
127.0.0.1:6379> setnx lock-age 20
(integer) 0
127.0.0.1:6379>  setnx lock-age 20
(integer) 0
③
127.0.0.1:6379> setnx lock-age 20
(integer) 1
127.0.0.1:6379> get lock-age
"20"