What is a handler in Spring?

The HandlerAdapter is basically an interface which facilitates the handling of HTTP requests in a very flexible manner in Spring MVC. It’s used in conjunction with the HandlerMapping, which maps a method to a specific URL. The DispatcherServlet then uses a HandlerAdapter to invoke this method.

What is difference between Spring 4 and Spring 5?

So Spring 4 had to support Java 6, 7 and 8. To maintain the backward compatibility, Spring framework didn’t adapted many new features which Java 8 brought with itself e.g. Lambda programming. Spring 5 has baseline version 8, so it uses many new features of Java 8 and 9 as well. e.g.

What is handleRequest?

handleRequest is the method specified on the Controller interface itself. If you directly implement that interface, rather than extending one of the above base classes, then you need to implement handleRequest directly. Both are obsolete, and not used in controllers written for Spring 2.5 and later.

What is Handler mapper in Spring MVC?

HandlerMapping is an interface that defines a mapping between requests and handler objects. While Spring MVC framework provides some ready-made implementations, the interface can be implemented by developers to provide customized mapping strategy.

What are the different Handler Mappings in Spring?

Spring MVC Handler Mapping

  • BeanNameUrlHandlerMapping.
  • ControllerClassNameHandlerMapping.
  • SimpleUrlHandlerMapping.

What is Cors filter in Spring?

Advertisements. Cross-Origin Resource Sharing (CORS) is a security concept that allows restricting the resources implemented in web browsers. It prevents the JavaScript code producing or consuming the requests against different origin.

What is Springsecurityconfigureradapter Spring boot?

In Spring Boot 2, if we want our own security configuration, we can simply add a custom WebSecurityConfigurerAdapter. This will disable the default auto-configuration and enable our custom security configuration. Spring Boot 2 also uses most of Spring Security’s defaults.

Can we use Hibernate 4 with spring 5?

Spring 5x is compatible with hibernate 4x unless you are using it as an implementation of JPA which might not be compatible.

Can AWS Lambda return a value?

Returning a value If you use the RequestResponse invocation type, such as Synchronous invocation, AWS Lambda returns the result of the Python function call to the client invoking the Lambda function (in the HTTP response to the invocation request, serialized into JSON).

What is difference between handler and controller?

Handler is a inclusive i.e. covering all the services details. Controller is an an exclusive implementation.