最重要的特征是,有两个数组存对象,忙的数组和闲的数组. 当使用对象后,不是立即销毁对象,而是放回池子闲的数组里面,下次使用直接拿,拿到后放到忙的数组里.当拿不到的时候就再创建新
class WorkerPool
{
/**
* @var 忙的数组
*/
private array $occupiedWorkers = [];
/**
* @var 清闲的数组
*/
private array $freeWorkers = [];
//拿对象
public function get(): MyObj
{
if (count($this->freeWorkers) == 0) {
$worker = new MyObj();
} else {
$worker = array_pop($this->freeWorkers);
}
$this->occupiedWorkers[spl_object_hash($worker)] = $worker;
return $worker;
}
//放回对象
public function dispose(MyObj $worker)
{
$key = spl_object_hash($worker);
if (isset($this->occupiedWorkers[$key])) {
unset($this->occupiedWorkers[$key]);
$this->freeWorkers[$key] = $worker;
}
}
public function count(): int
{
return count($this->occupiedWorkers) + count($this->freeWorkers);
}
}
$pool = new WorkerPool();
$worker1 = $pool->get();
$pool->dispose($worker1);
$worker2 = $pool->get();