Learning Spring Boot from Zero to Cloud: Part 32 – Conditional Beans: When to Load and When to Skip!

Unlock the full potential of Spring Boot’s auto-configuration magic by mastering Conditional Beans! In this video, we dive deep into how @Conditional, @ConditionalOnProperty, @ConditionalOnClass, and related annotations work behind the scenes.

✅ Learn how to use conditions for dynamic configuration
✅ Understand Spring Boot’s evaluation pipeline
✅ See real-world use cases like cloud adaptation and feature toggles

Whether you’re building for AWS, Azure, or just toggling beta features—this video will give you everything you need to write modular, intelligent Spring applications.

🔍 What we cover:

00:00 – Introduction
03:12 – What are Conditional Beans?
06:13 – Benefits & practical applications
08:49 – How Spring evaluates conditions
09:23 – Conditional annotations overview
12:34 – Interaction with Scope, Lazy, and Profiles
14:14 – Example 1: @ConditionalOnProperty
16:47 – Example 2: @ConditionalOnClass
18:01 – Example 3: @ConditionalOnBean
20:40 – Testing & Debugging
21:59 – Use Case 1 – Feature Toggles / A/B Experiments
24:33 – Use Case 2 – Cloud Provider Detection
25:52 – Use Case 3 – Modular Starters (Kafka vs RabbitMQ)
27:02 – use Case 4 – Gradual Migration Paths (v1 -> v2)
28:58 – Best practices & anti-patterns
31:12 – Code walkthrough