[feat]: Real-Time Stock Price Updates with WebSockets

[0PrashantYadav0]

Description

• Detailed Description:
  Enabling real-time stock price updates using WebSockets allows the application to push live updates to the client without requiring constant polling. This enhancement improves the user experience by providing instantaneous updates.
• How to Solve:
  1. Configure WebSocket Support:
     Create a configuration class and annotate it with @EnableWebSocketMessageBroker:

     @Configuration
     @EnableWebSocketMessageBroker
     public class WebSocketConfig implements WebSocketMessageBrokerConfigurer {
         @Override
         public void configureMessageBroker(MessageBrokerRegistry config) {
             config.enableSimpleBroker("/topic");
             config.setApplicationDestinationPrefixes("/app");
         }
     
         @Override
         public void registerStompEndpoints(StompEndpointRegistry registry) {
             registry.addEndpoint("/ws").setAllowedOrigins("*").withSockJS();
         }
     }

  2. Create a WebSocket Controller:
     Develop a controller that periodically retrieves stock prices and broadcasts them:

     @Controller
     public class StockWebSocketController {
         @Autowired
         private SimpMessagingTemplate messagingTemplate;
     
         @Scheduled(fixedRate = 5000)
         public void sendStockUpdates() {
             // Logic to retrieve the latest stock prices
             String update = getLatestStockUpdate();
             messagingTemplate.convertAndSend("/topic/stockPrices", update);
         }
         
         private String getLatestStockUpdate() {
             // Fetch and format the latest stock data as needed
             return "{\"symbol\":\"AAPL\",\"price\":150.25}";
         }
     }

  3. Client-Side Integration:
     On the client side, use a WebSocket client (such as SockJS and Stomp.js) to subscribe to /topic/stockPrices and update the UI in real-time.
  4. Test End-to-End:
     Verify that clients receive real-time updates without polling.