Custom Cache Implementations

Config::$cache accepts any PSR-16 Psr\SimpleCache\CacheInterface. The SDK itself has no direct dependency on any specific cache backend — you bring the implementation.

use BioTime\Config;
use Psr\SimpleCache\CacheInterface;

class ArrayCache implements CacheInterface
{
    private array $store = [];

    public function get(string $key, mixed $default = null): mixed
    {
        return $this->store[$key] ?? $default;
    }

    public function set(string $key, mixed $value, \DateInterval|int|null $ttl = null): bool
    {
        $this->store[$key] = $value;
        return true;
    }

    public function delete(string $key): bool
    {
        unset($this->store[$key]);
        return true;
    }

    // ...implement the remaining CacheInterface methods (clear, getMultiple, setMultiple, deleteMultiple, has)
}

$config = Config::fromArray([
    'ip'       => '192.168.1.50',
    'username' => 'admin',
    'password' => 'secret',
    'cache'    => new ArrayCache(),
]);

Any real-world PSR-16 package works the same way — Symfony's PSR-16 cache adapter, a Redis- or Memcached-backed implementation, or Laravel's cache store (already wired up for you automatically — see Laravel installation).

Only the auth token is cached this way — see Caching for what's stored, under what key, and for how long.