Method onRequest

packages/editor-core/src/Services/MessageHub.ts:231–253

* 注册请求处理器（用于请求-响应模式） * * @param topic - 请求主题 * @param handler - 请求处理器，可以返回响应数据 * @returns 取消注册的函数

(
        topic: string,
        handler: RequestHandler<TRequest, TResponse>
    )

     * @returns 取消注册的函数
     */
    public onRequest<TRequest = any, TResponse = any>(
        topic: string,
        handler: RequestHandler<TRequest, TResponse>
    ): () => void {
        if (this.requestHandlers.has(topic)) {
            logger.warn(`Request handler for topic "${topic}" already exists, replacing...`);
        }

        const subscription: RequestSubscription = {
            topic,
            handler
        };

        this.requestHandlers.set(topic, subscription);
        logger.debug(`Registered request handler for topic: ${topic}`);

        return () => {
            if (this.requestHandlers.get(topic) === subscription) {
                this.requestHandlers.delete(topic);
                logger.debug(`Unregistered request handler for topic: ${topic}`);
            }
        };
    }

    /**
     * 发送请求并等待响应（请求-响应模式）