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<?php
declare(strict_types=1);
/**
* CakePHP(tm) : Rapid Development Framework (https://cakephp.org)
* Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org/)
*
* Licensed under The MIT License
* For full copyright and license information, please see the LICENSE.txt
* Redistributions of files must retain the above copyright notice.
*
* @copyright Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org/)
* @link https://cakephp.org CakePHP(tm) Project
* @since 0.1.0
* @license https://opensource.org/licenses/MIT MIT License
*/
namespace Cake\Enqueue;
use Cake\Database\Connection;
use Cake\Datasource\ConnectionInterface;
use Interop\Queue\Consumer;
use Interop\Queue\SubscriptionConsumer;
use InvalidArgumentException;
use LogicException;
class CakeSubscriptionConsumer implements SubscriptionConsumer
{
use CakeConsumerHelperTrait;
/**
* @var \Cake\Enqueue\CakeContext
*/
private CakeContext $context;
/**
* an item contains an array: [CakeConsumer $consumer, callable $callback];.
*
* @var array
*/
private array $subscribers;
/**
* @var \Cake\Datasource\ConnectionInterface
*/
private ConnectionInterface $connection;
/**
* Default 20 minutes in milliseconds.
*
* @var int
*/
private int $redeliveryDelay;
/**
* Time to wait between subscription requests in milliseconds.
*
* @var int
*/
private int $pollingInterval = 200;
/**
* @param \Cake\Enqueue\CakeContext $context Context instance.
*/
public function __construct(CakeContext $context)
{
$this->context = $context;
$this->connection = $this->context->getCakeConnection();
$this->subscribers = [];
$this->redeliveryDelay = 1200000;
}
/**
* Get interval between retrying failed messages in milliseconds.
*
* @return int
*/
public function getRedeliveryDelay(): int
{
return $this->redeliveryDelay;
}
/**
* @param int $redeliveryDelay Redelivery delay.
* @return $this
*/
public function setRedeliveryDelay(int $redeliveryDelay)
{
$this->redeliveryDelay = $redeliveryDelay;
return $this;
}
/**
* @return int
*/
public function getPollingInterval(): int
{
return $this->pollingInterval;
}
/**
* @param int $msec Polling interval in ms.
* @return $this
*/
public function setPollingInterval(int $msec)
{
$this->pollingInterval = $msec;
return $this;
}
/**
* @param int $timeout Timeout value.
* @return void
*/
public function consume(int $timeout = 0): void
{
if (empty($this->subscribers)) {
throw new LogicException('No subscribers');
}
$queueNames = [];
foreach (array_keys($this->subscribers) as $queueName) {
$queueNames[$queueName] = $queueName;
}
$timeout /= 1000;
$now = time();
$redeliveryDelay = $this->getRedeliveryDelay() / 1000; // milliseconds to seconds
$currentQueueNames = [];
while (true) {
if (empty($currentQueueNames)) {
$currentQueueNames = $queueNames;
}
$this->removeExpiredMessages();
$this->redeliverMessages();
$message = $this->fetchMessage($currentQueueNames, $redeliveryDelay);
if ($message) {
[$consumer, $callback] = $this->subscribers[$message->getQueue()];
if (call_user_func($callback, $message, $consumer) === false) {
return;
}
unset($currentQueueNames[$message->getQueue()]);
} else {
$currentQueueNames = [];
usleep($this->getPollingInterval() * 1000);
}
if ($timeout && microtime(true) >= $now + $timeout) {
return;
}
}
}
/**
* @param \Cake\Enqueue\CakeConsumer $consumer Consumer instance.
* @param callable $callback Callback.
* @return void
*/
public function subscribe(Consumer $consumer, callable $callback): void
{
if ($consumer instanceof CakeConsumer == false) {
$msg = sprintf('The consumer must be instance of "%s" got "%s"', CakeConsumer::class, get_class($consumer));
throw new InvalidArgumentException($msg);
}
$queueName = $consumer->getQueue()->getQueueName();
if (array_key_exists($queueName, $this->subscribers)) {
if ($this->subscribers[$queueName][0] === $consumer && $this->subscribers[$queueName][1] === $callback) {
return;
}
$msg = sprintf('There is a consumer subscribed to queue: "%s"', $queueName);
throw new InvalidArgumentException($msg);
}
$this->subscribers[$queueName] = [$consumer, $callback];
}
/**
* @param \Cake\Enqueue\CakeConsumer $consumer Consumer instance.
* @return void
*/
public function unsubscribe(Consumer $consumer): void
{
if ($consumer instanceof CakeConsumer == false) {
$msg = sprintf('The consumer must be instance of "%s" got "%s"', CakeConsumer::class, get_class($consumer));
throw new InvalidArgumentException($msg);
}
$queueName = $consumer->getQueue()->getQueueName();
if (array_key_exists($queueName, $this->subscribers) == false) {
return;
}
if ($this->subscribers[$queueName][0] !== $consumer) {
return;
}
unset($this->subscribers[$queueName]);
}
/**
* @return void
*/
public function unsubscribeAll(): void
{
$this->subscribers = [];
}
/**
* @return \Cake\Enqueue\CakeContext
*/
protected function getContext(): CakeContext
{
return $this->context;
}
/**
* @return \Cake\Database\Connection
*/
protected function getConnection(): Connection
{
return $this->connection;
}
}