93 lines
2.2 KiB
PHP
93 lines
2.2 KiB
PHP
<?php
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namespace Core\lib;
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abstract class DBPool
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{
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private $min;
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private $max;
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private $conns;
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private $count;
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private $idleTime = 40;
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abstract protected function newDB();
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function __construct($min = 5, $max = 10)
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{
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$this->min = $min;
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$this->max = $max;
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$this->conns = new \Swoole\Coroutine\Channel($this->max);
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for ($i = 0; $i < $min; $i++) {
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$this->addDBToPool();
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}
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}
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public function initPool()
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{
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/*for ($i = 0; $i < $this->min; $i++) {
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$db = $this->newDB();
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$this->conns->push($db);
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}
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$this->count = $this->min;*/
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}
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public function getConnection()
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{
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if($this->conns->isEmpty()){
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if ($this->count < $this->max) {
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$this->addDBToPool();
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$dbObject = $this->conns->pop();
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}else{
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$dbObject = $this->conns->pop(5);
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}
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}else{
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$dbObject = $this->conns->pop();
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}
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if ($dbObject) {
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$dbObject->usedTime = time();
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}
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return $dbObject;
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}
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public function close($conn)
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{
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if ($conn) {
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$this->conns->push($conn);
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}
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}
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public function addDBToPool()
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{
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try {
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$this->count++;
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$db = $this->newDB();
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if (!$db) throw new \Exception('db创建错误');
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$dbObject = new \stdClass();
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$dbObject->usedTime = time();
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$dbObject->db = $db;
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$this->conns->push($dbObject);
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}catch (\Exception $e) {
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$this->count--;
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}
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}
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public function cleanPool()
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{
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if ($this->conns->length() < $this->min && $this->conns->length()<intval($this->max*0.6)) {
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return ;
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}
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$dbbak = [];
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while (true) {
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if($this->conns->isEmpty()) {
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break;
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}
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$obj = $this->conns->pop(0.1);
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if($this->count > $this->min && (time()-$obj->usedTime) > $this->idleTime){
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$this->count--;
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} else{
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$dbbak[] = $obj;
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}
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}
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foreach ($dbbak as $db){
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$this->conns->push($db);
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}
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}
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} |