# Real-Time Chat Application

A real-time chat application built with Spring Boot, GraphQL, and WebSocket (STOMP + SockJS).

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Features

• Real-time messaging using WebSocket
• GraphQL API for fetching and sending messages
• REST-style GraphQL endpoint (/graphql)
• Live chat updates via /topic/message
• Simple frontend with HTML + JavaScript

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Technologies

• Java 21
• Spring Boot
• Spring GraphQL
• Spring WebSocket (STOMP)
• SockJS
• HTML, JavaScript

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API Overview

GraphQL Endpoint

POST /graphql

Example Query

{
  messages {
    sender
    content
  }
}
Example Mutation
mutation {
  sendMessage(sender: "Arzu", content: "Hello") {
    sender
    content
  }
}

WebSocket Endpoint

/ws

Topic

/topic/message

How it works

User sends message via WebSocket or GraphQL mutation Backend processes message Message is broadcast to all connected clients via /topic/message Frontend updates chat in real-time

📌 Author

Built by Arzu