buzzerstar - static - core - Concurrency - SOURCE CODE

<?php
/**
 * Piwik - free/libre analytics platform
 *
 * @link http://piwik.org
 * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
 */
namespace Piwik\Concurrency;

use Piwik\Container\StaticContainer;
use Piwik\Option;
use Psr\Log\LoggerInterface;

/**
 * Manages a simple distributed list stored in an Option. No locking occurs, so the list
 * is not thread safe, and should only be used for use cases where atomicity is not
 * important.
 *
 * The list of items is serialized and stored in an Option. Items are converted to string
 * before being persisted, so it is not expected to unserialize objects.
 */
class DistributedList
{
    /**
     * The name of the option to store the list in.
     *
     * @var string
     */
    private $optionName;

    /**
     * @var LoggerInterface
     */
    private $logger;

    /**
     * Constructor.
     *
     * @param string $optionName
     */
    public function __construct($optionName, LoggerInterface $logger = null)
    {
        $this->optionName = $optionName;
        $this->logger = $logger ?: StaticContainer::get('Psr\Log\LoggerInterface');
    }

    /**
     * Queries the option table and returns all items in this list.
     *
     * @return array

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