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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">/**
* @fileoverview Manages the lifecycle of the configured MCP transport.
* @module src/mcp-server/transports/manager
*/
import type { ServerType } from '@hono/node-server';
import type { McpServer } from '@modelcontextprotocol/sdk/server/mcp.js';
import { inject, injectable } from 'tsyringe';
import type { AppConfig as AppConfigType } from '../../config/index.js';
import {
AppConfig,
CreateMcpServerInstance,
Logger,
} from '../../container/tokens.js';
import { requestContextService } from '../../utils/index.js';
import type { logger as LoggerType } from '../../utils/index.js';
import { startHttpTransport, stopHttpTransport } from './http/httpTransport.js';
import type { TransportServer } from './ITransport.js';
import {
startStdioTransport,
stopStdioTransport,
} from './stdio/stdioTransport.js';
@injectable()
export class TransportManager {
private serverInstance: TransportServer | null = null;
constructor(
@inject(AppConfig) private config: AppConfigType,
@inject(Logger) private logger: typeof LoggerType,
@inject(CreateMcpServerInstance)
private createMcpServer: () => Promise<McpServer>,
) {}
async start(): Promise<void> {
const context = requestContextService.createRequestContext({
operation: 'TransportManager.start',
transport: this.config.mcpTransportType,
});
this.logger.info(
`Starting transport: ${this.config.mcpTransportType}`,
context,
);
const mcpServer = await this.createMcpServer();
if (this.config.mcpTransportType === 'http') {
this.serverInstance = await startHttpTransport(mcpServer, context);
} else if (this.config.mcpTransportType === 'stdio') {
this.serverInstance = await startStdioTransport(mcpServer, context);
} else {
// This case should ideally not be reached due to config validation,
// but it's a good safeguard.
const transportType = String(this.config.mcpTransportType);
const error = new Error(`Unsupported transport type: ${transportType}`);
this.logger.crit(error.message, context);
throw error;
}
}
async stop(signal: string): Promise<void> {
const context = requestContextService.createRequestContext({
operation: 'TransportManager.stop',
signal,
});
if (!this.serverInstance) {
this.logger.warning(
'Stop called but no active server instance found.',
context,
);
return;
}
if (this.config.mcpTransportType === 'http') {
await stopHttpTransport(this.serverInstance as ServerType, context);
} else if (this.config.mcpTransportType === 'stdio') {
await stopStdioTransport(this.serverInstance as McpServer, context);
}
}
getServer(): TransportServer | null {
return this.serverInstance;
}
}
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