requestCommand

Sends a raw command directly over a real-time channel such as WebSocket.

Parameters

command (String): The command string to send to the server
data (String): The data to send with the command (a JSON-serializable object)
channel (String): The name of the channel to send on

Returns: None (void)

Description

Use it to send an arbitrary command message directly to a channel, instead of a Provider Instance's structured request. This suits servers whose protocol is command-based.

Example

// 특정 채널로 커스텀 커맨드 전송
$vm.requestCommand("PING", { timestamp: "2026-07-08" }, "mainChannel");

// 구독 요청 커맨드
$vm.requestCommand("SUBSCRIBE", { topic: "stock.005930" }, "realtime");

Related

$vm.subscribeData(provInstName, callback) — PI-based real-time subscription
$vm.requestData(provInstName) — PI-based data request

requestCommand​

requestCommand