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<?php
/*
* This file is part of the Predis package.
*
* (c) 2009-2020 Daniele Alessandri
* (c) 2021-2025 Till Krüss
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
require __DIR__ . '/shared.php';
// This is a basic example on how to use the Predis\DispatcherLoop class.
//
// To see this example in action you can just use redis-cli and publish some
// messages to the 'events' and 'control' channel, e.g.:
// ./redis-cli
// PUBLISH events first
// PUBLISH events second
// PUBLISH events third
// PUBLISH control terminate_dispatcher
// Create a client and disable r/w timeout on the socket
$client = new Predis\Client($single_server + ['read_write_timeout' => 0]);
// Return an initialized PubSub consumer instance from the client.
$pubsub = $client->pubSubLoop();
// Create a dispatcher loop instance and attach a bunch of callbacks.
$dispatcher = new Predis\Consumer\PubSub\DispatcherLoop($pubsub);
// Demonstrate how to use a callable class as a callback for the dispatcher loop.
class EventsListener implements Countable
{
private $events;
public function __construct()
{
$this->events = [];
}
public function count()
{
return count($this->events);
}
public function getEvents()
{
return $this->events;
}
public function __invoke($payload, $dispatcher)
{
$this->events[] = $payload;
}
}
// Attach our callable class to the dispatcher.
$dispatcher->attachCallback('events', $events = new EventsListener());
// Attach a function to control the dispatcher loop termination with a message.
$dispatcher->attachCallback('control', function ($payload, $dispatcher) {
if ($payload === 'terminate_dispatcher') {
$dispatcher->stop();
}
});
// Run the dispatcher loop until the callback attached to the 'control' channel
// receives 'terminate_dispatcher' as a message.
$dispatcher->run();
// Display our achievements!
echo "We received {$events->count()} messages!", PHP_EOL;
// Say goodbye :-)
$version = redis_version($client->info());
echo "Goodbye from Redis $version!", PHP_EOL;
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