Quick Answer: What Is Difference Between @Configuration And @Component?

What is single configuration?

A single-machine configuration consists of one or more local or remote clients that communicate with one or more servers residing on a single machine running one or more business applications..

What is @RestController?

Spring RestController annotation is a convenience annotation that is itself annotated with @Controller and @ResponseBody . This annotation is applied to a class to mark it as a request handler. Spring RestController annotation is used to create RESTful web services using Spring MVC.

What is basic configuration?

A basic configuration might overload, depending on how much processing is performed within the application. … The default reporting engine is run from the application server that provides reporting capabilities. The following diagram shows the main components in the basic configuration.

What is difference between @component and @service?

@Component serves as a generic stereotype for any Spring-managed component; whereas, @Repository, @Service, and @Controller serve as specializations of @Component for more specific use cases (e.g., in the persistence, service, and presentation layers, respectively).

Why do we use @component?

It is used to explicitly declare a single bean, rather than letting Spring do it automatically. If any class is annotated with @Component it will be automatically detect by using classpath scan. We should use @bean, if you want specific implementation based on dynamic condition.

What is the use of @configuration?

In computing, configuration files (commonly known simply as config files) are files used to configure the parameters and initial settings for some computer programs. They are used for user applications, server processes and operating system settings.

What configuration means?

1a : relative arrangement of parts or elements: such as. (1) : shape. (2) : contour of land configuration of the mountains. (3) : functional arrangement a small business computer system in its simplest configuration.

What is a bean in spring?

In Spring, the objects that form the backbone of your application and that are managed by the Spring IoC container are called beans. A bean is an object that is instantiated, assembled, and otherwise managed by a Spring IoC container. Otherwise, a bean is simply one of many objects in your application.

What is a Yaml config file?

Definition. YAML is a human-readable data serialization standard that can be used in conjunction with all programming languages and is often used to write configuration files.

What is bean life cycle?

The lifecycle of any object means when & how it is born, how it behaves throughout its life, and when & how it dies. Similarly, the bean life cycle refers to when & how the bean is instantiated, what action it performs until it lives, and when & how it is destroyed.

What is the use of @bean?

@Bean is a method-level annotation and a direct analog of the XML element. The annotation supports most of the attributes offered by , such as: init-method , destroy-method , autowiring , lazy-init , dependency-check , depends-on and scope .

What is the difference between @configuration and @EnableAutoConfiguration?

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 the difference between @bean and @component?

@Component auto detects and configures the beans using classpath scanning whereas @Bean explicitly declares a single bean, rather than letting Spring do it automatically.

Can we replace @service with @component?

According to documentaion @Repository , @Service , @Controller are all synonyms. They all just specializations of @Component annotation. So, generally, they can be used one istead of other.

What is bean file in Java?

In computing based on the Java Platform, JavaBeans are classes that encapsulate many objects into a single object (the bean). They are serializable, have a zero-argument constructor, and allow access to properties using getter and setter methods.

What is @RequestBody?

This is used to convert the body of the HTTP request to the java class object with the aid of selected HTTP message converter. This annotation will be used in the method parameter and the body of the http request will be mapped to that method parameter.

How do I run system configuration?

The Run window offers one of the fastest ways to open the System Configuration tool. Simultaneously press the Windows + R keys on your keyboard to launch it, type “msconfig”, and then press Enter or click/tap on OK. The System Configuration tool should open immediately.

What is a Spring bean in Java?

A bean is an object that is instantiated, assembled, and otherwise managed by a Spring IoC container. … These beans are created with the configuration metadata that you supply to the container.

Is @configuration Singleton?

Now let’s create the Spring Configuration class. … It’s because the default scope of spring beans is Singleton. We can change it using @Scope annotation.

What is @ComponentScan?

The @ComponentScan annotation is used with the @Configuration annotation to tell Spring the packages to scan for annotated components. @ComponentScan also used to specify base packages and base package classes using thebasePackageClasses or basePackages attributes of @ComponentScan.

What is the use of @EnableAutoConfiguration?

Annotation Type EnableAutoConfiguration Enable auto-configuration of the Spring Application Context, attempting to guess and configure beans that you are likely to need. Auto-configuration classes are usually applied based on your classpath and what beans you have defined. For example, if you have tomcat-embedded.

What is SpringBootApplication?

Spring Boot @SpringBootApplication annotation is used to mark a configuration class that declares one or more @Bean methods and also triggers auto-configuration and component scanning.

Can we replace @controller with @component?

Instead of using @Component on a controller class in Spring MVC, we use @Controller, which is more readable and appropriate. … Even if you replace @Controller annotation with @Compoenent, Spring can automatically detect and register the controller class but it may not work as you expect with respect to request mapping.

What is the use of @configuration annotation?

Spring @Configuration annotation helps in Spring annotation based configuration. @Configuration annotation indicates that a class declares one or more @Bean methods and may be processed by the Spring container to generate bean definitions and service requests for those beans at runtime.