How can we implement pushing messages to the frontend in MQ?

To achieve message push to the frontend, several methods can be used:

1. WebSocket: Utilize the WebSocket protocol to establish a persistent connection with the frontend, allowing the backend to push messages to the frontend and enabling the frontend to receive and process messages through the WebSocket API.
2. SSE technology allows the backend to send event streams to the frontend in real-time using the HTTP protocol, enabling real-time push notifications. The frontend can receive and process events using the EventSource API.
3. Long Polling: The front-end sends a request to the back-end, which keeps the connection suspended until there is a new message to push to the front-end, or until a certain amount of time has passed, at which point it responds. The front-end then sends another request after receiving the response, keeping the connection open. This method simulates real-time pushing effects.
4. HTTP-based push notifications (Web Push): By registering the browser as a terminal to receive push notifications, the backend can send push messages to the browser. This method requires browser support for the Push API and user authorization to receive push notifications.

Choose the appropriate method to deliver messages to the front-end based on specific requirements and system architecture.