Redis事务

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一、Redis正常开启事务,执行事务.
127.0.0.1:6379> multi 
OK
127.0.0.1:6379> hincrby role role:9527:age 2
QUEUED
127.0.0.1:6379> hincrby role role:9527:age 3
QUEUED
127.0.0.1:6379> hincrby role role:9527:age -5
QUEUED
127.0.0.1:6379> exec
1) (integer) 24
2) (integer) 27
3) (integer) 22

二、Redis放弃事务.
127.0.0.1:6379> multi
OK
127.0.0.1:6379> hmset role role:9527:birthday 1992-10-10 
QUEUED
127.0.0.1:6379> hexists role role:9527:id
QUEUED
127.0.0.1:6379> hkeys role
QUEUED
127.0.0.1:6379> discard
OK

三、Redis在事务队列中存在语法性错误(类似于java中的运行时异常),则执行exec命令时,正确的命令会被执行,错误的命令会抛出异常.
127.0.0.1:6379> multi
OK
127.0.0.1:6379> hkeys role
QUEUED
127.0.0.1:6379> hvals role
QUEUED
127.0.0.1:6379> hincrby role role:9527:name 3
QUEUED
127.0.0.1:6379> exec
1) 1) "role:9527:id"
   2) "role:9527:name"
   3) "role:9527:age"
2) 1) "9527"
   2) "xiaomaomao"
   3) "22"
3) (error) ERR hash value is not an integer

四、Redis在事务队列中出现命令性异常(类似于java中的编译期异常),则执行exec命令的时候所有命令都不会执行.
127.0.0.1:6379> multi 
OK
127.0.0.1:6379> hexists role role:9527:name
QUEUED
127.0.0.1:6379> hget role
(error) ERR wrong number of arguments for ‘hget‘ command
127.0.0.1:6379> hsetnx role role:9527:gender female
QUEUED
127.0.0.1:6379> exec
(error) EXECABORT Transaction discarded because of previous errors.