memcacheconnectionconfigurator.php

<?php
 
namespace Bitrix\Main\Data\Configurator;
 
use Bitrix\Main\Application;
use Bitrix\Main\NotSupportedException;
 
class MemcacheConnectionConfigurator
{
    protected $config;
    protected $servers = [];
 
    public function __construct($config)
    {
        if (!extension_loaded('memcache'))
        {
            throw new NotSupportedException('memcache extension is not loaded.');
        }
 
        $this->config = $config;
 
        $this->addServers($this->getConfig());
    }
 
    protected function addServers($config)
    {
        $servers = $config['servers'] ?? [];
 
        if (isset($config['host'], $config['port']))
        {
            array_unshift($servers, [
                'host' => $config['host'],
                'port' => $config['port'],
            ]);
        }
 
        foreach ($servers as $server)
        {
            if (!isset($server['weight']) || $server['weight'] <= 0)
            {
                $server['weight'] = 1;
            }
 
            $this->servers[] = [
                'host' => $server['host'] ?? 'localhost',
                'port' => $server['port'] ?? '11211',
                'weight' => $server['weight'],
            ];
        }
 
        return $this;
    }
 
    public function getConfig()
    {
        return $this->config;
    }
 
    public function createConnection()
    {
        if (!$this->servers)
        {
            throw new NotSupportedException('Empty server list to memcache connection.');
        }
 
        $connectionTimeout = $this->getConfig()['connectionTimeout'] ?? 1;
        $connection = new \Memcache();
 
        $result = false;
        if (count($this->servers) === 1)
        {
            ['host' => $host, 'port' => $port] = $this->servers[0];
            $result = $connection->pconnect($host, $port, $connectionTimeout);
        }
        else
        {
            foreach ($this->servers as $server)
            {
                $success = $connection->addServer(
                    $server['host'],
                    $server['port'],
                    true,
                    $server['weight'],
                    $connectionTimeout
                );
 
                if ($success)
                {
                    $result = $success;
                }
            }
        }
 
        if (!$result)
        {
            $error = error_get_last();
            if (isset($error["type"]) && $error["type"] === E_WARNING)
            {
                $exception = new \ErrorException($error['message'], 0, $error['type'], $error['file'], $error['line']);
                $application = Application::getInstance();
                $exceptionHandler = $application->getExceptionHandler();
                $exceptionHandler->writeToLog($exception);
            }
        }
 
        return $result? $connection : null;
    }
}