php+redis+lua+id生成器,分布式id生成器，redislua

php+redis+lua+id生成器,分布式id生成器，redislua

$redis = \Redis::connection(‘passport’);

$script = ”
redis.replicate_commands();
local prefix = ‘_idgenerator‘;
local partitionCount = 4096;
local step = 3;
local startStep = 0;
local tag = KEYS[1];
local partition
if KEYS[2] == nil then
partition = 0;
else
partition = KEYS[2] % partitionCount;
end
local now = redis.call(‘TIME’);
local miliSecondKey = prefix .. tag ..’’ .. partition .. ‘’ .. now[1] .. ‘_’ .. math.floor(now[2]/1000);
local count;
repeat
count = tonumber(redis.call(‘INCRBY’, miliSecondKey, step));
if count > (1024 - step) then
now = redis.call(‘TIME’);
miliSecondKey = prefix .. tag ..’’ .. partition .. ‘’ .. now[1] .. ‘_’ .. math.floor(now[2]/1000);
end
until count <= (1024 - step)
if count == step then
redis.call(‘PEXPIRE’, miliSecondKey, 5);
end
return {tonumber(now[1]), tonumber(now[2]), partition, count + startStep}”;
hash=redis->script(‘load’,script);hashresult=redis−>evalSha(hash,1,’test’);

$hashresult 的值 ：
{ [0]=> int(1513149655) [1]=> int(451274) [2]=> int(0) [3]=> int(3) }

id=((hashresult[0] * 1000 + hashresult[1]/1000)<<(12+10))+(1<<10)+hashresult[3];

最后id的值为
6346611151702328323