1: <?php
2:
3: declare(strict_types=1);
4:
5: /**
6: * This file is part of the Nexus MCP SDK package.
7: *
8: * (c) 2026 John Paul E. Balandan, CPA <paulbalandan@gmail.com>
9: *
10: * For the full copyright and license information, please view
11: * the LICENSE file that was distributed with this source code.
12: */
13:
14: namespace Nexus\Mcp\Server\Exception;
15:
16: use Nexus\Mcp\Core\Exception\AbstractJsonRpcProtocolException;
17: use Nexus\Mcp\Core\Schema\Enum\ProtocolErrorCode;
18: use Nexus\Mcp\Core\Schema\RequestId;
19:
20: /**
21: * Thrown when an inbound request other than `initialize` or `ping` arrives
22: * before the client has completed the `initialize` handshake.
23: */
24: final class ServerNotInitializedException extends AbstractJsonRpcProtocolException
25: {
26: public function __construct(string $method, ?RequestId $requestId = null, ?\Throwable $previous = null)
27: {
28: parent::__construct(
29: $requestId,
30: \sprintf('Cannot handle "%s" before the client has sent "notifications/initialized".', $method),
31: $previous,
32: );
33: }
34:
35: #[\Override]
36: public static function getErrorCode(): ProtocolErrorCode
37: {
38: return ProtocolErrorCode::InvalidRequest;
39: }
40: }
41: