Method ensureConnected

dash/dash-renderer/src/utils/workerClient.ts:161–201

* Ensure the worker is connected, initiating connection if needed. * @param config The Dash config with websocket settings

(config: {
        websocket?: {
            url?: string;
            worker_url?: string;
            inactivity_timeout?: number;
            heartbeat_interval?: number;
        };
    })

     * @param config The Dash config with websocket settings
     */
    public async ensureConnected(config: {
        websocket?: {
            url?: string;
            worker_url?: string;
            inactivity_timeout?: number;
            heartbeat_interval?: number;
        };
    }): Promise<void> {
        // Already connected
        if (this.isConnected) {
            return;
        }

        // Connection in progress, wait for it
        if (this.connectionPromise) {
            await this.connectionPromise;
            return;
        }

        // Need to initiate connection
        if (!config.websocket?.url || !config.websocket?.worker_url) {
            throw new Error('WebSocket config not available');
        }

        if (typeof SharedWorker === 'undefined') {
            throw new Error('SharedWorker not supported');
        }

        // Build WebSocket URL
        const wsProtocol =
            window.location.protocol === 'https:' ? 'wss:' : 'ws:';
        const host = window.location.host;
        const wsUrl = `${wsProtocol}//${host}${config.websocket.url}`;

        await this.connect(
            config.websocket.worker_url,
            wsUrl,
            config.websocket.inactivity_timeout,
            config.websocket.heartbeat_interval
        );
    }

    /**
     * Send a callback request to the server via the worker.