WedemyServer

(Backend repo). Clone of Udemy, an e-learning platform, built using Springboot + Vue 3 + Typescript. With CreditCard and PayPal checkout (both powered by Braintree Payments). Uses Spring Security & Spring Session Redis for handling auth, instead of stateless JWT Tokens. For simplicity, both UserDetails and UserRole (enum) are stored in the same table. Maximum 2 concurrent login sessions per user. You can easily customize these settings in SecurityConfig.

Frontend & Live Demo

Click to view Frontend Repo built using Vue 3 and Typescript.

Requirements

Java 11 or higher
MySQL 8
Redis Server 5.0+ (native / Cloud / Docker)
Google OAuth Credentials (for Google Login)
Braintree Developer Account + API Keys.
(OPTIONAL) Free PayPal Business Account.

Environmental Variables

You MUST set these ENV variables on your System before you launch this Springboot app. 💡TIP: During dev/test, you can easily set them up within your IDE (⚠ will be LOCAL only): In either Eclipse or IntelliJ IDEA, in the top toolbar, find the Run menu > Edit/Run Configuration > Environment > Environmental Variables. Add (+) each key and its value, then click Apply.

#below are for Google OAuth
GOOGLE_CLIENT_ID=
GOOGLE_CLIENT_SECRET=
#below are for Braintree Payments
BT_MERCHANT_ID=
BT_PUBLIC_KEY=
BT_PRIVATE_KEY=
#...You may include DB credentials too...

Important ⚠

Please examine the file application.yml inside src/main/resources/ folder. Place all your necessary Spring Application properties there. Notice property frontend.root.url; replace value with yours. But for sensitive info (like Passwords or API Keys), DON'T PASTE THEM IN THERE DIRECTLY ❌. I suggest store them as Environmental Variables instead (see above), then either declare them as property.name = ${ENV_KEY_NAME}, OR call directly in your code as shown in BraintreeConfig.

Databases Used

MySQL 8.0

This is the primary database. All DateTimes are stored and queried in UTC only❗ (Hint: USE java.time.Instant as Type for ALL Datetime fields). Handle Timezone conversion on your Frontend! For your convenience, I have included a mysqldump file data_wedemy.sql inside src/main/resources which contains sample data for some tables. Please take a look at the ERD diagram of this DB.

⭐To maintain consistent time-zone (UTC) with your Java app, ensure your MySQL connection URL has parameter connectionTimeZone=UTC. See example below. For native @Query's, use UTC_TIMESTAMP() or UTC_DATE().
```
spring.datasource.url=jdbc:mysql://localhost:3306/wedemy?connectionTimeZone=UTC
# OR, use this
spring.jpa.properties.hibernate.jdbc.time_zone=UTC
```

Redis v5.0 (or higher)

This project uses Redis for 2 main tasks: Caching, and Storing login sessions. You can download latest Redis (macOS & Linux) from https://redis.io/download. Windows users may download the latest native installer (.msi) from this GitHub repo. Alternatively, you could run redis in Docker. If you prefer the Cloud instead, you could try Redis Cloud at: https://redis.com/try-free/. Remember to replace redis credentials inside application.yml to match your running Redis instance.

Tip 💡	Redis now has an OFFICIAL cross-platform desktop GUI client: RedisInsight. Download it free from here

Payments Handling

All payments are securely handled by Braintree Payments (owned by PayPal), which also supports cards, Apple Pay, GooglePay, Venmo and many other methods. This project has been configured with Credit-Card and PayPal Checkout only, in SANDBOX (test) mode. Make sure you obtain a set of 3 API Keys from your own Braintree Dev Account and store them as ENV variables: BT_MERCHANT_ID, BT_PUBLIC_KEY and BT_PRIVATE_KEY. For Braintree tutorials and examples, please check their official docs.

reloadbrain / WedemyServer