Redis事务

Multi 标记一个事务块的开始

• 事务块内的多条命令会按照先后顺序被放进一个队列当中，最后由 EXEC 命令原子性(atomic)地执行
• multi redis命令 Multi

$return = \Illuminate\Support\Facades\Redis::connection('expired')->multi()
        ->set('key1', 'val1')
        ->get('key1')
        ->set('key2', 'val2')
        ->get('key2')
        ->exec();
// $return = [true, 'val1', true, 'val2']

Exec 执行所有事务块内的命令

• exec redis命令 Exec

# 参考 multi 代码

Watch 监视一个(或多个) key

• 如果在事务执行之前这个(或这些) key 被其他命令所改动，那么事务将被打断
• watch redis命令 Watch

\Illuminate\Support\Facades\Redis::connection('expired')->watch('key1');    // 监听 key1
\Illuminate\Support\Facades\Redis::connection('expired')->watch('key2');   // 监听 key2
// \Illuminate\Support\Facades\Redis::connection('expired')->set('key1', 'val11xxx');  // 修改key1
$return = \Illuminate\Support\Facades\Redis::connection('expired')->multi()
        ->set('key1', 'val11')
        ->get('key1')
        ->set('key2', 'val22')
        ->get('key2')
        ->exec();
// 返回值 [true, 'val11', true, 'val22']  如果在在执行事务之前修改监听key值 返回false

Unwatch 取消 WATCH 命令对所有 key 的监视

• unwatch redis命令 UNWATCH

\Illuminate\Support\Facades\Redis::connection('expired')->watch('key1');    // 监听 key1
\Illuminate\Support\Facades\Redis::connection('expired')->watch('key2');   // 监听 key2
// \Illuminate\Support\Facades\Redis::connection('expired')->set('key1', 'val11xxx');  // 修改key1
\Illuminate\Support\Facades\Redis::connection('expired')->unWatch();   // 取消所有监听
$return = \Illuminate\Support\Facades\Redis::connection('expired')->multi()
        ->set('key1', 'val11')
        ->get('key1')
        ->set('key2', 'val22')
        ->get('key2')
        ->exec();

Discard 取消事务，放弃执行事务块内的所有命令

• discard redis命令 DISCARD

$return = \Illuminate\Support\Facades\Redis::connection('expired')->multi()
        ->set('key1', 'val11')
        ->get('key1')
        ->set('key2', 'val22')
        ->get('key2')
        ->discard();  // true
// 取消成功返回false