File Server/Exception/ServerAlreadyInitializedException.php

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 a second `initialize` request arrives after the handshake has
22:	* already started or completed for this session.
23:	*/
24:	final class ServerAlreadyInitializedException extends AbstractJsonRpcProtocolException
25:	{
26:	public function __construct(?RequestId $requestId = null, ?\Throwable $previous = null)
27:	{
28:	parent::__construct(
29:	$requestId,
30:	'Cannot re-initialize: the "initialize" handshake has already started or completed for this session.',
31:	$previous,
32:	);
33:	}
34:
35:	#[\Override]
36:	public static function getErrorCode(): ProtocolErrorCode
37:	{
38:	return ProtocolErrorCode::InvalidRequest;
39:	}
40:	}
41: