├── README.md
├── api-server
├── .gitignore
├── app.js
├── configs.js
├── db.js
├── example.env
├── package-lock.json
├── package.json
└── redis.js
├── assets
└── data-flow-diagram.png
├── client-app
├── .gitignore
├── README.md
├── app
│ ├── favicon.ico
│ ├── globals.css
│ ├── layout.js
│ └── page.js
├── components
│ ├── HomeBody.jsx
│ ├── InputForm.jsx
│ ├── TechItemCard.jsx
│ └── TechSummary.jsx
├── example.env
├── jsconfig.json
├── libs
│ └── mysqlDb.js
├── next.config.js
├── package-lock.json
├── package.json
├── postcss.config.js
├── public
│ ├── next.svg
│ └── vercel.svg
└── tailwind.config.js
└── worker-server
├── .gitignore
├── app.js
├── configs.js
├── db.js
├── example.env
├── helper.js
├── package-lock.json
├── package.json
└── redis.js
/README.md:
--------------------------------------------------------------------------------
1 | ## Redis Microservice Architecture
2 |
3 | ### Project Description
4 |
5 | This project workspace consists of a client-app, api-server, and worker-server, showcasing a Redis cache and Redis publish-worker architecture. The client-app communicates with the api-server to retrieve data, which is then cached using Redis for faster subsequent access. The worker-server listens for incoming messages via Redis publish-subscribe mechanism and performs background tasks based on those messages. With Redis acting as a high-performance data store and messaging system, this project demonstrates an efficient and scalable architecture for caching and background processing in a distributed application environment.
6 |
7 | ### Project structure
8 |
9 | The project is structured as a monorepo and includes the following micro-peojects:
10 |
11 | - `client-app`: The client app built with Next.js and Tailwind CSS.
12 | - `api-server`: The api server build with Node.js, Mysql database
13 | - `worker-server`: The subscribed worker-server with redis and Mysql database.
14 |
15 | ### Installation and Run
16 |
17 | Installing the project is easy and straight forward. If you're using npm, simply run the following command in your terminal from every project's root:
18 |
19 | If you're using npm, the command will be to install:
20 |
21 | ```sh
22 | npm install
23 | ```
24 |
25 | And the following command to run:
26 |
27 | ```sh
28 | npm run dev
29 | ```
30 |
31 | **Note: Please add all the environment variables from the "example.env" file added to each project**
32 |
33 | ### Data-flow Diagram
34 |
35 |
36 |
37 |
39 |
40 |
41 | ### Explanation
42 |
43 | - In this project architecture, the `client-app` serves as the primary frontend application, communicating with the `api-server` via API calls to a MySQL database.
44 |
45 | - When a GET request is sent to the `api-server`, it first checks the Redis cache for relevant data. If the cache contains the data, the `api-server` responds promptly to the `client-app` without querying the database, resulting in faster response times. However, in cases where the cache is empty, the `api-server` queries the database, retrieves the data, and caches it in Redis for future use.
46 |
47 | - For POST requests that involve data creation, the `api-server` publishes a message to the Redis pub/sub system and immediately responds positively to the client. The `worker-server`, which is subscribed to the Redis pub/sub, receives this message. It performs the necessary operations related to the request and finally stores the data in the database. This asynchronous processing allows the `api-serve`r to quickly acknowledge the client's request while the `worker-server` handles the background tasks efficiently
48 |
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/api-server/.gitignore:
--------------------------------------------------------------------------------
1 | .env
2 | node_modules
--------------------------------------------------------------------------------
/api-server/app.js:
--------------------------------------------------------------------------------
1 | import express from "express";
2 | import cors from "cors";
3 | import { PORT } from "./configs.js";
4 | import {
5 | addTechToCache,
6 | deleteTechFromCache,
7 | getTechFromCache,
8 | publishTech,
9 | } from "./redis.js";
10 | import { addListToDB, getListFromDB } from "./db.js";
11 |
12 | const app = express();
13 | app.use(cors());
14 | app.use(express.json());
15 | app.use(express.urlencoded({ extended: true }));
16 |
17 | // '/' health check
18 | app.get("/", (_, res) => res.send("OK!"));
19 |
20 | // '/get' get all lists
21 | app.get("/get", async (_, res) => {
22 | const cachedTechList = await getTechFromCache();
23 | if (!cachedTechList) {
24 | const list = await getListFromDB();
25 | res.status(200).send({ isCached: false, data: list });
26 | return await addTechToCache(list);
27 | }
28 | res.status(200).send({ isCached: true, data: cachedTechList });
29 | });
30 |
31 | // '/create' create tech lists
32 | app.post("/create", async (req, res) => {
33 | try {
34 | const { text } = req.body;
35 | console.log("input text:", text);
36 | // await addListToDB(text);
37 | // await deleteTechFromCache();
38 | await publishTech(text); // publish task to a redis channel
39 | res.status(201).send({ message: "Tech List created successfully" });
40 | } catch (error) {
41 | console.log("create tech error==>", error);
42 | res.status(500).send({ message: error?.message || "Server Error" });
43 | }
44 | });
45 |
46 | app.listen(PORT, () => {
47 | console.log(`Server running on port ${PORT}`);
48 | });
49 |
--------------------------------------------------------------------------------
/api-server/configs.js:
--------------------------------------------------------------------------------
1 | import dotenv from "dotenv";
2 | dotenv.config();
3 |
4 | // port config
5 | export const PORT = process.env.PORT || 5000;
6 |
7 | // db configs
8 | const sqlHost = process.env.MYSQL_HOST || "localhost";
9 | const sqlUser = process.env.MYSQL_USERNAME || "root";
10 | const sqlPassword = process.env.MYSQL_PASSWORD || "mypassword";
11 | const sqlDatabase = process.env.MYSQL_DATABASE || "projectdb";
12 | export const sqlTable = process.env.MYSQL_TABLE || "techlist";
13 |
14 | export const dbConfigs = {
15 | host: sqlHost,
16 | user: sqlUser,
17 | password: sqlPassword,
18 | database: sqlDatabase,
19 | };
20 |
21 | // redis configs
22 | const redisUsername = process.env.REDIS_USERNAME || "user";
23 | const redisPassword = process.env.REDIS_PASSWORD || "mypassword";
24 | const redisHost = process.env.REDIS_HOST || "127.0.0.1";
25 | const redisPort = process.env.REDIS_PORT || 6379;
26 | export const redisChannel = process.env.REDIS_CHANNEL || "channel1";
27 | export const redisCacheName = process.env.REDIS_CACHE || "techlist";
28 |
29 | export const redisConfigs = {
30 | // username: redisUsername,
31 | // password: redisPassword,
32 | host: redisHost,
33 | port: redisPort,
34 | };
35 |
--------------------------------------------------------------------------------
/api-server/db.js:
--------------------------------------------------------------------------------
1 | import mysql from "mysql2/promise";
2 | import { dbConfigs, sqlTable } from "./configs.js";
3 |
4 | // insert a list to mysql db
5 | export const addListToDB = async (text) => {
6 | const query = `INSERT INTO ${sqlTable} (text) VALUES ('${text}')`;
7 | const connection = await mysql.createConnection(dbConfigs);
8 | await connection.execute(query);
9 | await connection.end();
10 | };
11 |
12 | // get all lists from mysql db
13 | export const getListFromDB = async (text) => {
14 | const query = `SELECT * FROM ${sqlTable}`;
15 | const connection = await mysql.createConnection(dbConfigs);
16 | const [data, _] = await connection.execute(query);
17 | await connection.end();
18 | return data;
19 | };
20 |
--------------------------------------------------------------------------------
/api-server/example.env:
--------------------------------------------------------------------------------
1 | PORT=5000
2 |
3 | # mySql db details
4 | MYSQL_HOST=
5 | MYSQL_USERNAME=
6 | MYSQL_PASSWORD=
7 | MYSQL_DATABASE=
8 | MYSQL_TABLE=
9 |
10 | # redis details
11 | REDIS_USERNAME=
12 | REDIS_PASSWORD=
13 | REDIS_HOST=
14 | REDIS_PORT=
15 | REDIS_CHANNEL=
16 | REDIS_CACHE=
17 |
--------------------------------------------------------------------------------
/api-server/package-lock.json:
--------------------------------------------------------------------------------
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269 | "object-assign": "^4",
270 | "vary": "^1"
271 | },
272 | "engines": {
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1115 | "is-number": "^7.0.0"
1116 | },
1117 | "engines": {
1118 | "node": ">=8.0"
1119 | }
1120 | },
1121 | "node_modules/toidentifier": {
1122 | "version": "1.0.1",
1123 | "resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.1.tgz",
1124 | "integrity": "sha512-o5sSPKEkg/DIQNmH43V0/uerLrpzVedkUh8tGNvaeXpfpuwjKenlSox/2O/BTlZUtEe+JG7s5YhEz608PlAHRA==",
1125 | "engines": {
1126 | "node": ">=0.6"
1127 | }
1128 | },
1129 | "node_modules/touch": {
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1133 | "dev": true,
1134 | "dependencies": {
1135 | "nopt": "~1.0.10"
1136 | },
1137 | "bin": {
1138 | "nodetouch": "bin/nodetouch.js"
1139 | }
1140 | },
1141 | "node_modules/type-is": {
1142 | "version": "1.6.18",
1143 | "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.18.tgz",
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1145 | "dependencies": {
1146 | "media-typer": "0.3.0",
1147 | "mime-types": "~2.1.24"
1148 | },
1149 | "engines": {
1150 | "node": ">= 0.6"
1151 | }
1152 | },
1153 | "node_modules/undefsafe": {
1154 | "version": "2.0.5",
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1157 | "dev": true
1158 | },
1159 | "node_modules/unpipe": {
1160 | "version": "1.0.0",
1161 | "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz",
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1163 | "engines": {
1164 | "node": ">= 0.8"
1165 | }
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1172 | "node": ">= 0.4.0"
1173 | }
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1177 | "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
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1179 | "engines": {
1180 | "node": ">= 0.8"
1181 | }
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1183 | "node_modules/yallist": {
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1185 | "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
1186 | "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A=="
1187 | }
1188 | }
1189 | }
1190 |
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/api-server/package.json:
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1 | {
2 | "name": "api-server",
3 | "version": "1.0.0",
4 | "description": "",
5 | "main": "index.js",
6 | "type": "module",
7 | "scripts": {
8 | "dev": "nodemon app.js"
9 | },
10 | "keywords": [],
11 | "author": "",
12 | "license": "ISC",
13 | "dependencies": {
14 | "cors": "^2.8.5",
15 | "dotenv": "^16.1.4",
16 | "express": "^4.18.2",
17 | "mysql2": "^3.3.3",
18 | "redis": "^4.6.7"
19 | },
20 | "devDependencies": {
21 | "nodemon": "^2.0.22"
22 | }
23 | }
24 |
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/api-server/redis.js:
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1 | import { createClient } from "redis";
2 | import { redisCacheName, redisChannel, redisConfigs } from "./configs.js";
3 |
4 | // create redis client
5 | const redisClient = createClient(redisConfigs);
6 |
7 | // add redis cache
8 | export const addTechToCache = async (tech) => {
9 | await redisClient.connect();
10 | await redisClient.set(redisCacheName, JSON.stringify(tech));
11 | await redisClient.disconnect();
12 | };
13 |
14 | // get cache from redis
15 | export const getTechFromCache = async () => {
16 | await redisClient.connect();
17 | const cachedTechString = await redisClient.get(redisCacheName);
18 | await redisClient.disconnect();
19 | return JSON.parse(cachedTechString);
20 | };
21 |
22 | // delete cache from redis
23 | export const deleteTechFromCache = async () => {
24 | await redisClient.connect();
25 | await redisClient.del(redisCacheName);
26 | await redisClient.disconnect();
27 | };
28 |
29 | // publish to a redis channel (worker-server)
30 | export const publishTech = async (tech) => {
31 | await redisClient.connect();
32 | await redisClient.publish(redisChannel, tech);
33 | await redisClient.disconnect();
34 | };
35 |
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/assets/data-flow-diagram.png:
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https://raw.githubusercontent.com/mostafizur99/redis-microservice-architecture/6bbe7858bb6c5847620f0b58028842e78ed2cedc/assets/data-flow-diagram.png
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/client-app/.gitignore:
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1 | # See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
2 |
3 | # dependencies
4 | /node_modules
5 | /.pnp
6 | .pnp.js
7 |
8 | # testing
9 | /coverage
10 |
11 | # next.js
12 | /.next/
13 | /out/
14 |
15 | # production
16 | /build
17 |
18 | # misc
19 | .DS_Store
20 | *.pem
21 |
22 | # debug
23 | npm-debug.log*
24 | yarn-debug.log*
25 | yarn-error.log*
26 |
27 | # local env files
28 | .env*.local
29 |
30 | # vercel
31 | .vercel
32 |
33 | # typescript
34 | *.tsbuildinfo
35 | next-env.d.ts
36 |
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/client-app/README.md:
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1 | This is a [Next.js](https://nextjs.org/) project bootstrapped with [`create-next-app`](https://github.com/vercel/next.js/tree/canary/packages/create-next-app).
2 |
3 | ## Getting Started
4 |
5 | First, run the development server:
6 |
7 | ```bash
8 | npm run dev
9 | # or
10 | yarn dev
11 | # or
12 | pnpm dev
13 | ```
14 |
15 | Open [http://localhost:3000](http://localhost:3000) with your browser to see the result.
16 |
17 | You can start editing the page by modifying `app/page.js`. The page auto-updates as you edit the file.
18 |
19 | This project uses [`next/font`](https://nextjs.org/docs/basic-features/font-optimization) to automatically optimize and load Inter, a custom Google Font.
20 |
21 | ## Learn More
22 |
23 | To learn more about Next.js, take a look at the following resources:
24 |
25 | - [Next.js Documentation](https://nextjs.org/docs) - learn about Next.js features and API.
26 | - [Learn Next.js](https://nextjs.org/learn) - an interactive Next.js tutorial.
27 |
28 | You can check out [the Next.js GitHub repository](https://github.com/vercel/next.js/) - your feedback and contributions are welcome!
29 |
30 | ## Deploy on Vercel
31 |
32 | The easiest way to deploy your Next.js app is to use the [Vercel Platform](https://vercel.com/new?utm_medium=default-template&filter=next.js&utm_source=create-next-app&utm_campaign=create-next-app-readme) from the creators of Next.js.
33 |
34 | Check out our [Next.js deployment documentation](https://nextjs.org/docs/deployment) for more details.
35 |
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/client-app/app/favicon.ico:
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https://raw.githubusercontent.com/mostafizur99/redis-microservice-architecture/6bbe7858bb6c5847620f0b58028842e78ed2cedc/client-app/app/favicon.ico
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/client-app/app/globals.css:
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1 | @tailwind base;
2 | @tailwind components;
3 | @tailwind utilities;
4 |
5 | :root {
6 | --foreground-rgb: 0, 0, 0;
7 | --background-start-rgb: 214, 219, 220;
8 | --background-end-rgb: 255, 255, 255;
9 | }
10 |
11 | @media (prefers-color-scheme: dark) {
12 | :root {
13 | --foreground-rgb: 255, 255, 255;
14 | --background-start-rgb: 0, 0, 0;
15 | --background-end-rgb: 0, 0, 0;
16 | }
17 | }
18 |
19 | body {
20 | color: rgb(var(--foreground-rgb));
21 | background: linear-gradient(
22 | to bottom,
23 | transparent,
24 | rgb(var(--background-end-rgb))
25 | )
26 | rgb(var(--background-start-rgb));
27 | }
28 |
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/client-app/app/layout.js:
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1 | import "./globals.css";
2 | import { Inter } from "next/font/google";
3 |
4 | const inter = Inter({ subsets: ["latin"] });
5 |
6 | export const metadata = {
7 | title: "Client App",
8 | description: "Redis architecture client app",
9 | };
10 |
11 | export default function RootLayout({ children }) {
12 | return (
13 |
14 | {children}
15 |
16 | );
17 | }
18 |
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/client-app/app/page.js:
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1 | import HomeBody from "@/components/HomeBody";
2 |
3 | export default function Home() {
4 | return (
5 |
6 |
7 | Tech Summary
8 |
9 |
11 | );
12 | }
13 |
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/client-app/components/HomeBody.jsx:
--------------------------------------------------------------------------------
1 | "use client";
2 |
3 | import React, { useEffect, useState } from "react";
4 | import InputForm from "./InputForm";
5 | import TechSummary from "./TechSummary";
6 | import { createTech, getTech } from "@/libs/mysqlDb";
7 |
8 | const HomeBody = () => {
9 | const [userInput, setUserInput] = useState("");
10 | const [isCache, setIsCache] = useState(false);
11 | const [techList, setTechList] = useState([
12 | { text: "AWS - priority (high)", id: 1 },
13 | ]);
14 |
15 | // set tech-list on first render
16 | useEffect(() => {
17 | const loadTech = async () => {
18 | try {
19 | const { isCached, data } = await getTech();
20 | setTechList(data);
21 | setIsCache(isCached);
22 | } catch (error) {
23 | console.error("Error loading techList:", error);
24 | }
25 | };
26 | loadTech();
27 | }, []);
28 |
29 | // handle form submit list
30 | const handleSubmit = async () => {
31 | await createTech(userInput);
32 | const { isCached, data } = await getTech();
33 | setTechList(data);
34 | setIsCache(isCached);
35 | };
36 |
37 | // handle refresh list data
38 | const handleRefresh = async () => {
39 | const { isCached, data } = await getTech();
40 | setTechList(data);
41 | setIsCache(isCached);
42 | };
43 |
44 | return (
45 |
46 |
53 |
60 |
61 | );
62 | };
63 |
64 | export default HomeBody;
65 |
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/client-app/components/InputForm.jsx:
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1 | import React from "react";
2 |
3 | const InputForm = ({ setUserInput, userInput, handleSubmit }) => {
4 | return (
5 |
6 |
26 |
27 | );
28 | };
29 |
30 | export default InputForm;
31 |
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/client-app/components/TechItemCard.jsx:
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1 | import React from "react";
2 |
3 | const TechItemCard = ({ text, index }) => {
4 | return (
5 |
6 |
7 | {index + 1}. {text}
8 |
9 |
10 | );
11 | };
12 |
13 | export default TechItemCard;
14 |
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/client-app/components/TechSummary.jsx:
--------------------------------------------------------------------------------
1 | import React from "react";
2 | import TechItemCard from "./TechItemCard";
3 |
4 | const TechSummary = ({ techList, isCache, handleRefresh }) => {
5 | return (
6 |
7 |
8 | Tech List{" "}
9 | ({techList.length})
10 |
11 |
12 |
17 | {isCache ? " cached" : " live"}
18 |
19 |
23 | ↻
24 |
25 |
26 | <>
27 | {techList.map((tech, index) => (
28 |
29 | ))}
30 |
31 |
38 |