What is auto configuration in spring boot?

Spring Boot auto-configuration attempts to automatically configure your Spring application based on the jar dependencies that you have added. For example, if HSQLDB is on your classpath, and you have not manually configured any database connection beans, then Spring Boot auto-configures an in-memory database.

What do you mean by auto-configuration in spring boot and disable?

Spring Boot auto-configuration automatically configures the Spring application based on the jar dependencies that we have added.

Disable Auto-configuration Classes
  1. import org. …
  2. import org. …
  3. import org. …
  4. @Configuration(proxyBeanMethods = false)
  5. @EnableAutoConfiguration(exclude={DataSourceAutoConfiguration.
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What is meant by auto-configuration?

Auto-configuration is the automatic configuration of devices without manual intervention, without any need for software configuration programs or jumpers. Ideally, auto-configuring devices should just "plug and play".

What is enable auto-configuration?

@EnableAutoConfiguration. The @EnableAutoConfiguration annotation enables Spring Boot to auto-configure the application context. Therefore, it automatically creates and registers beans based on both the included jar files in the classpath and the beans defined by us.Mar 29, 2021

Which databases does spring boot auto-configure?

Spring Boot can auto-configure embedded H2, HSQL, and Derby databases. You need not provide any connection URLs. You need only include a build dependency to the embedded database that you want to use.

How do you turn off Spring beans?

In Spring Boot, you can use the @ConditionalOnProperty annotation to enable or disable a particular bean based on the presence of a property. This is very useful if you want to provide optional features to your microservice. And that’s it. Your optionalClass bean should resolve to null when you specify mybean.

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How does spring boot starter work?

In general, by browsing through the starters, you’ll find that the spring-boot-starter-web pulls in 60+ other dependencies and third-party libraries into your project – by default. From JSON and YAML libraries, to logging, to Spring’s WebMVC framework. It’s all basic Maven/Gradle dependency management.

How do I create a custom bean in spring boot?

Different Methods to Create a Spring Bean
  1. Creating Bean Inside an XML Configuration File (beans. xml)
  2. Using @Component Annotation.
  3. Using @Bean Annotation.

How do I turn off datasource in spring boot?

Disable Auto-configuration Classes
  1. import org. springframework. boot. autoconfigure. …
  2. import org. springframework. boot. autoconfigure. …
  3. import org. springframework. context. …
  4. @Configuration(proxyBeanMethods = false)
  5. @EnableAutoConfiguration(exclude={DataSourceAutoConfiguration. class})
  6. public class MyConfiguration.
  7. {
  8. }

What is difference between component and component scan?

How They Differ. The main difference between these annotations is that @ComponentScan scans for Spring components while @EnableAutoConfiguration is used for auto-configuring beans present in the classpath in Spring Boot applications.

What is spring boot starter?

Spring Boot Starters are dependency descriptors that can be added under the <dependencies> section in pom. xml. There are around 50+ Spring Boot Starters for different Spring and related technologies. These starters give all the dependencies under a single name.

What is difference between @controller and @RestController?

@Controller is used to mark classes as Spring MVC Controller. @RestController annotation is a special controller used in RESTful Web services, and it’s the combination of @Controller and @ResponseBody annotation. It is a specialized version of @Component annotation.

How do I run a spring boot program from the command line?

Show activity on this post.
  1. Run Spring Boot app with java -jar command. To run your Spring Boot app from a command line in a Terminal window you can use java -jar command. …
  2. Run Spring Boot app using Maven. You can also use Maven plugin to run your Spring Boot app. …
  3. Run Spring Boot App with Gradle.

How do I use a component scan?

Using @ComponentScan in a Spring Application. With Spring, we use the @ComponentScan annotation along with the @Configuration annotation to specify the packages that we want to be scanned. @ComponentScan without arguments tells Spring to scan the current package and all of its sub-packages.

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What is conditional bean in Java?

It allows to load beans conditionally depending on a certain environment property: @Configuration @ConditionalOnProperty( value=”module.

What is Spring Boot controller?

In Spring Boot, the controller class is responsible for processing incoming REST API requests, preparing a model, and returning the view to be rendered as a response. The controller classes in Spring are annotated either by the @Controller or the @RestController annotation.

What is spring boot starter actuator?

Spring Boot Actuator is a sub-project of the Spring Boot Framework. It uses HTTP endpoints to expose operational information about any running application. The main benefit of using this library is that we get health and monitoring metrics from production-ready applications.

How does Spring boot actuator work?

Spring Boot Actuator is a sub-project of the Spring Boot Framework. It uses HTTP endpoints to expose operational information about any running application. The main benefit of using this library is that we get health and monitoring metrics from production-ready applications.

How does Spring autoconfiguration work?

Spring Boot auto-configuration attempts to automatically configure your Spring application based on the jar dependencies that you have added. For example, If HSQLDB is on your classpath, and you have not manually configured any database connection beans, then we will auto-configure an in-memory database.

What is the difference between controller and rest controller?

@Controller is used to mark classes as Spring MVC Controller. @RestController annotation is a special controller used in RESTful Web services, and it’s the combination of @Controller and @ResponseBody annotation. It is a specialized version of @Component annotation.

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What is Spring boot starter actuator?

Spring Boot Actuator is a sub-project of the Spring Boot Framework. It uses HTTP endpoints to expose operational information about any running application. The main benefit of using this library is that we get health and monitoring metrics from production-ready applications.

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