78 lines
2.5 KiB
PHP
78 lines
2.5 KiB
PHP
<?php
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/*
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* This file is part of the official PHP MCP SDK.
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*
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* A collaboration between Symfony and the PHP Foundation.
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Mcp\Server\Transport;
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use Symfony\Component\Uid\Uuid;
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/**
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* @template TResult
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*
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* @author Christopher Hertel <mail@christopher-hertel.de>
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* @author Kyrian Obikwelu <koshnawaza@gmail.com>
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*/
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interface TransportInterface
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{
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/**
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* Initializes the transport.
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*/
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public function initialize(): void;
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/**
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* Register callback for ALL incoming messages.
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*
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* The transport calls this whenever ANY message arrives, regardless of source.
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*
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* @param callable(string $message, ?Uuid $sessionId): void $listener
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*/
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public function onMessage(callable $listener): void;
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/**
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* Starts the transport's execution process.
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*
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* - For a blocking transport like STDIO, this method will run a continuous loop.
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* - For a single-request transport like HTTP, this will process the request
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* and return a result (e.g., a PSR-7 Response) to be sent to the client.
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*
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* @return TResult the result of the transport's execution, if any
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*/
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public function listen(): mixed;
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/**
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* Send a message to the client.
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*
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* The transport decides HOW to send based on context
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*
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* @param array<string, mixed> $context Context about this message:
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* - 'session_id': Uuid|null
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* - 'type': 'response'|'request'|'notification'
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* - 'in_reply_to': int|string|null (ID of request this responds to)
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* - 'expects_response': bool (if this is a request needing response)
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*/
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public function send(string $data, array $context): void;
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/**
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* Register callback for session termination.
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*
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* This can happen when a client disconnects or explicitly ends their session.
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*
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* @param callable(Uuid $sessionId): void $listener The callback function to execute when destroying a session
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*/
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public function onSessionEnd(callable $listener): void;
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/**
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* Closes the transport and cleans up any resources.
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*
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* This method should be called when the transport is no longer needed.
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* It should clean up any resources and close any connections.
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*/
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public function close(): void;
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}
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