EP.32 Connecting WebSocket with Microservices in Go for Scalable and Flexible Systems

WebSocket and Microservices – Designing a Scalable System in Go

What Are Microservices and Why Use Them with WebSocket?

Microservices architecture decomposes applications into smaller, independently deployable services. When combined with WebSocket, a protocol that enables real-time, bidirectional communication, the system becomes highly scalable and efficient for handling a large number of users.

Building the WebSocket Gateway

package main

import (
    "encoding/json"
    "log"
    "net/http"

    "github.com/gorilla/websocket"
)

var upgrader = websocket.Upgrader{
    CheckOrigin: func(r *http.Request) bool {
        return true
    },
}

type Event struct {
    Service string      `json:"service"`
    Action  string      `json:"action"`
    Data    interface{} `json:"data"`
}

func handleConnections(w http.ResponseWriter, r *http.Request) {
    conn, err := upgrader.Upgrade(w, r, nil)
    if err != nil {
        log.Println("Error upgrading connection:", err)
        return
    }
    defer conn.Close()

    for {
        _, msg, err := conn.ReadMessage()
        if err != nil {
            log.Println("Error reading message:", err)
            break
        }

        var event Event
        if err := json.Unmarshal(msg, &event); err != nil {
            log.Println("Invalid event format:", err)
            continue
        }
    }
}

Challenge!

Try building a real-time notification system that is distributed across Microservices using WebSocket Gateway and Redis Pub/Sub to manage alerts for users!

Next Episode

In EP.33, we will explore using GraphQL with WebSocket to create a powerful API that supports real-time functionality!