Install RabbitMQ with Docker & Running with NodeJS

In this article let us see how to install RabbitMQ with Docker and access the connection URL from NodeJS (ExpressJS)

Make sure your Docker Desktop is running. If you have not installed Docker Desktop then make sure to install Docker & Docker Compose as we will be running docker-compose.yml.

In this article we will cover the following topic s:

1. Running RabbitMQ with Docker
2. Enable RabbitMQ Management Plugin from with Docker Container
3. Running RabbitMQ Producer with NodeJS (ExpressJS)
4. Running RabbitMQ Consumer with NodeJS (ExpressJS)
5. Check Producer & Consumer message result

---

1. Running RabbitMQ with Docker

/rabbitmq-training/docker-compose.yml

version: "3.8"

services:
  rabbitmq:
    #RabbitMQ
    image: rabbitmq:3.11-management
    container_name: rabbitmq
    hostname: rabbitmq
    ports:
      #Port: 5672 is used by RabbitMQ Server
      - "5672:5672"
      #Port: 15672 is used by RabbitMQ Management UI
      - "15672:15672"
    environment:
      #Add default username and password to log into the RabbitMQ ManagementUI & RabbitMQ Server
      - RABBITMQ_DEFAULT_USER=stackcoder_user
      - RABBITMQ_DEFAULT_PASS=StackCoderPass
      - RABBITMQ_DEFAULT_VHOST=wifihost
    volumes:
      - ./rabbit/data:/var/lib/rabbitmq
      - ./rabbit/log:/var/log/rabbitmq
      - ./rabbit/etc:/etc/rabbitmq
    restart: always

If you observe the above code then you will be able to see the default user and password, which we will use in Producer & Consumer connection

RABBITMQ_DEFAULT_USER=stackcoder_user
RABBITMQ_DEFAULT_PASS=StackCoderPass

If you have setup everything up correctly as above then you must be able to run the following command

docker container ls

---

2. Enable RabbitMQ Management Plugin from with Docker Container

You might require the RabbitMQ Management Admin tool to check if everything is working as expected. Let us log in to running Docker Container and enable the RabbitMQ Management plugin.

docker container ls

docker exec -it rabbitmq /bin/bash

rabbitmq-plugins enable rabbitmq_management

Now if you open the URL: http://localhost:15672 then you will be able to see the following RabbitMQ Management tool.

---

3. RabbitMQ Producer with NodeJS / ExpressJS

/rabbitmq-training/producer/package.json

{
  "dependencies": {
    "amqplib": "^0.10.3",
    "express": "^4.18.2"
  },
  "name": "producer",
  "version": "1.0.0",
  "main": "index.js",
  "devDependencies": {
    "nodemon": "^2.0.20"
  },
  "scripts": {
    "start": "nodemon index.js"
  },
  "keywords": [],
  "author": "Channaveer Hakari",
  "license": "ISC",
  "description": ""
}

/rabbitmq-training/producer/index.js

const express = require("express");
const app = express();
const amqplib = require("amqplib");

let channel, conn;
const QUEUE = "test";

async function connectRabbitMQ() {
    conn = await amqplib.connect("amqp://stackcoder_user:StackCoderPass@localhost");
    
    channel = await conn.createChannel();
    await channel.assertQueue(QUEUE);
}

connectRabbitMQ();

app.get("/producer", async (req, res) => {
    try {
        const result = await channel.sendToQueue(
            QUEUE, 
            Buffer.from(JSON.stringify({
                name: "Channaveer Hakari",
                email: "channaveer@gmail.com"
            }))
        );

        return res.send({
            status: "success",
            message: "Message sent to queue",
            data: {
                result
            }
        });
    } catch (error) {
        console.log(error);
    }
});

app.listen(6000, () => {
    console.log("Producer listening on port 6000");
});

Running RabbitMQ Producer Code with NodeJS

First, install all the node dependencies by running the following command and then start the project

#Command will install all the project dependencies by reading package.json
npm install

#Start the project, you can also run with code: node index.js
npm run start

To produce the message into RabbitMQ you can invoke the project URL from Postman App as shown in the following image

---

4. RabbitMQ Consumer with NodeJS / ExpressJS

/rabbitmq-training/consumer/package.json

{
  "dependencies": {
    "amqplib": "^0.10.3",
    "express": "^4.18.2"
  },
  "name": "consumer",
  "version": "1.0.0",
  "main": "index.js",
  "devDependencies": {
    "nodemon": "^2.0.20"
  },
  "scripts": {
    "start": "nodemon index.js"
  },
  "keywords": [],
  "author": "Channaveer Hakari",
  "license": "ISC",
  "description": "Running RabbitMQ Consumer"
}

/rabbitmq-traning/consumer/index.js

const express = require("express");
const app = express();
const amqplib = require("amqplib");

(async function connectRabbitMQ() {
    const QUEUE = "test";

    const conn = await amqplib.connect("amqp://stackcoder_user:StackCoderPass@localhost");
    
    const channel = await conn.createChannel();
    await channel.assertQueue(QUEUE);

    try {
        await channel.consume(QUEUE, (msg) => {
            console.log("Message: ", JSON.parse(msg.content));
            channel.ack(msg);
        });


        console.log("Read message from CONSUMER \n");
    } catch (error) {
        console.log(error);
    }
}) ();

// connectRabbitMQ();

app.listen(6001, () => {
    console.log("Consumer listening on port 6001");
});

Running RabbitMQ Consumer Code with NodeJS

First, install all the node dependencies by running the following command and then start the project

#Command will install all the project dependencies by reading package.json
npm install

#Start the project, you can also run with code: node index.js
npm run start

---

5. Checking the Consumer Consuming Result

Now your producer and consumer are running, let's run the producer code from Postman and see the Consumer result from the console output.

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