Created RedisFactory which will create the redis adapter for the redis lock

module/Common/src/Cache/RedisFactory.php

@@ -0,0 +1,30 @@
+<?php
+declare(strict_types=1);
+
+namespace Shlinkio\Shlink\Common\Cache;
+
+use Predis\Client as PredisClient;
+use Psr\Container\ContainerInterface;
+
+use function array_shift;
+use function count;
+use function is_array;
+use function is_string;
+
+class RedisFactory
+{
+    public const SERVICE_NAME = 'Shlinkio\Shlink\Common\Cache\Redis';
+
+    public function __invoke(ContainerInterface $container): PredisClient
+    {
+        $redisConfig = $container->get('config')['redis'] ?? [];
+        $servers = $redisConfig['servers'];
+
+        if (is_array($servers) && count($servers) === 1) {
+            $servers = array_shift($servers);
+        }
+
+        $options = is_string($servers) ? null : ['cluster' => 'redis'];
+        return new PredisClient($servers, $options);
+    }
+}