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7.2 Custom Auto-Configuration & @Conditional Annotations
Topic Summary
Understand how Spring Boot starters work under the hood using @ConditionalOnClass, @ConditionalOnProperty, and META-INF imports.
What You Will Learn
• Demystify Spring Boot's 'magic' auto-configuration.
• Use `@ConditionalOnProperty` to toggle sandbox vs live payment gateways.
• Package reusable enterprise starters.
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