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What is Spring Boot Auto-configuration?

Deepika Sahu answered on December 17, 2022 Popularity 8/10 Helpfulness 2/10

answer What is Spring Boot Auto-configuration?

What is Spring Boot Auto-configuration?

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Spring Boot auto-configuration attempts to automatically configure your Spring application
based on the jar dependencies that you have added.

Why do we need Spring Boot Auto Configuration?
-> Spring-based applications have a lot of configuration.
-> When we use Spring MVC, we need to configure 
	- Component scan, 
	- Dispatcher Servlet
	- View resolver
	- Web jars(for delivering static content) among other things.
-> When we use Hibernate/JPA, we would need to configure a 
	- data source
	- entity manager factory/session factory
	- transaction manager among a host of other things.
-> When you use cache
	- Cache configuration
-> When you use Message Queue
	- Message queue configuration
-> When you use a NoSQL database
	- NoSQL database configuration

Spring Boot: Can we think differently?
Spring Boot brings in a new thought process around this:
-> Can we bring more intelligence into this? When a spring MVC jar is added to an application, 
    can we auto-configure some beans automatically?
-> How about auto-configuring a Data Source if Hibernate jar is on the classpath?
-> How about auto-configuring a Dispatcher Servlet if the Spring MVC jar is on the classpath?

One more example, if HSQLDB is present on your classpath and you have not configured any database manually, Spring will auto-configure an in-memory database for you.
The Spring Boot auto-configuration feature tries to automatically configure your Spring application based upon the JAR dependency you have added in the classpath.

Popularity 8/10 Helpfulness 2/10 Language java

Source: Grepper

Tags: java spring-boot

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Contributed on Dec 17 2022

Deepika Sahu

0 Answers Avg Quality 2/10

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