transactions - Redis 中的顺序监视调用

Question

这种模式合法吗？

$redis->watch('foo');
$var1 = $redis->get('foo');

$redis->watch('bar');
$var2 = $redis->get('bar');


$redis->multi();
$redis->mset(['foo' => 42, 'bar' => 9001]);
$redis->exec();

或者秒看调用取消了先看状态？

Answer 1

这个模式是合法的。来自 redis documentation

WATCH can be called multiple times. Simply all the WATCH calls will have the effects to watch for changes starting from the call, up to the moment EXEC is called. You can also send any number of keys to a single WATCH call.