redis中的事务操作案例分析

set zhangsan 800
set lisi 100
multi
decrby zhangsan 100
incrby lisi 100
exec

127.0.0.1:6379> multi
OK
127.0.0.1:6379> decrby zhang 100
QUEUED
127.0.0.1:6379> hasdfasdf
(error) ERR unknown command 'hasdfasdf'
127.0.0.1:6379> exec
(error) EXECABORT Transaction discarded because of previous errors.
127.0.0.1:6379> mget zhang wang
1) "800"
2) "100"

127.0.0.1:6379> multi
OK
127.0.0.1:6379> decrby zhang 100
QUEUED
127.0.0.1:6379> sadd wang 1
QUEUED
127.0.0.1:6379> exec
1) (integer) 700
2) (error) WRONGTYPE Operation against a key holding the wrong kind of value
127.0.0.1:6379> mget zhang wang
1) "700"
2) "100"

127.0.0.1:6379> set ticket 1
OK
127.0.0.1:6379> set money 100
OK
127.0.0.1:6379> multi
OK
127.0.0.1:6379> decr ticket
QUEUED
127.0.0.1:6379> decrby money 10

QUEUED
127.0.0.1:6379> exec
1) (integer) -1
2) (integer) 90

127.0.0.1:6379> set ticket 1
OK
127.0.0.1:6379> set money 100
OK
127.0.0.1:6379> watch ticket
OK
127.0.0.1:6379> multi
OK
127.0.0.1:6379> decr ticket
QUEUED
127.0.0.1:6379> decrby money 10
QUEUED
127.0.0.1:6379> exec
(nil)//返回nil,说明监视的ticket已经改变了,事务就取消了.
127.0.0.1:6379> mget ticket money
1) "0"
2) "100"

watch key1 key2 ... keyN

unwatch