Chat Application with Server Sent Events (SSE) in spring boot

• Start SseDemoApplication
• Open https://localhost:8443 in multiple browser windows
• Ignore the SSL warning
• Use the chat

Preview

Hint for parallel connections

The browser allows only 6 parallel connections for an SSE. After some investigation I found out, this is solved in HTTP/2 with a connection pool. But in order to enforce HTTP/2 one must also use SSL. Therefore I enabled SSL by default for the demo.