Real-Time Chat Backend

This is the backend server for the Real-Time Chat Application, built using Spring Boot with GraphQL to handle messaging and status updates.

Features

• GraphQL API for efficient data fetching
• Subscriptions for real-time message updates
• Spring Boot for scalable backend services
• MongoDB for data storage
• WebSockets for real-time communication
• Secure & Lightweight architecture

Tech Stack

• Framework: Spring Boot
• GraphQL Library: GraphQL Java & Spring Boot GraphQL
• Database: MongoDB
• Messaging: WebSockets, GraphQL Subscriptions
• Build Tool: Maven
• Security: JWT Authentication (optional)

Getting Started

Prerequisites

• JDK 17+
• Maven
• MongoDB (running locally or via Docker)

Setup Instructions

1. Clone the repository:

   git clone https://github.com/anubhav-auth/messagingPrac.git
   cd messagingPrac

2. Configure the application properties (src/main/resources/application.properties):

   spring.data.mongodb.uri=mongodb://localhost:27017/chat_db

3. Build and run the server:

   mvn clean install
   mvn spring-boot:run

GraphQL API Schema

enum MessageStatus {
    UNSENT
    SENT
    DELIVERED
    READ
}

type Message {
    id: String!
    topic: String!
    content: String!
    sender: String!
    receiver: String!
    status: MessageStatus!
    sentAt: String!
    deliveredAt: String!
    readAt: String!
}

type MessageStatusUpdates {
    id: String!
    receiver: String!
    status: MessageStatus!
    deliveredAt: String!
    readAt: String!
}

type Query {
    syncMessages(topic: String): [Message!]!
}

type Mutation {
    sendMessage(id: String!, topic: String!, content: String!, sender: String!, sentAt: String!): Message!
    statusUpdate(messageId: String!, topic: String!, status: MessageStatus!, deliveredAt: String!, readAt: String!): MessageStatusUpdates!
}

type Subscription {
    messageAdded(topic: String!): Message!
    messageUpdates(topic: String!): MessageStatusUpdates!
}

Example Query (Fetching Messages)

query GetMessages($topic: String!) {
  syncMessages(topic: $topic) {
    id
    content
    sender
    receiver
    status
    sentAt
    deliveredAt
    readAt
  }
}

Running with Docker

1. Build the Docker image:

   docker build -t chat-backend .

2. Run the container:

   docker run -p 8080:8080 --name chat-backend chat-backend

Contributing

1. Fork the repository.
2. Create a new branch (feature/new-feature or bugfix/fix-issue).
3. Commit your changes with meaningful messages.
4. Push to your branch and create a Pull Request.

License

This project is licensed under the MIT License. See the LICENSE file for details.

---

Contact

For any queries, feel free to reach out:

• Email: anubhavauth@gmail.com
• GitHub: anubhav-auth

Happy Coding! 🚀