What is the difference between ServletConfig and ServletContext?

What is the difference between ServletConfig and ServletContext?

The servletconfig object refers to the single servlet whereas servletcontext object refers to the whole web application. ServletConfig is implemented by the servlet container to initialize a single servlet using init(). That is, you can pass initialization parameters to the servlet using the web.

What is application context and servlet context?

Application Context: It is a Spring specific thing. It is initialized by Spring. It holds all the bean definitions and life-cycle of the beans that are defined inside the spring configuration files. Servlet-Context has no idea about these things.

Can I learn Spring boot without Java?

No, learning Spring without Java does not add any value, moreover it will be difficult for you to understand any Spring Framework concept without Java. Spring Framework is Java based Framework.

How do I know if spring boot is running?

On system level – you can run your project as a service, which is documented in the Official documentation – Deployments. Then you can query the application status service myapp status .

How do I know if Microservice is running?

A first way is to gather the data that your system or service is generating as it is running, representing its internal state. These are collected from log files, metrics and counters from interfaces, application traces, code instrumentation, etc. This is sometimes also referred to as white box monitoring.

How does Spring achieve DI or IoC?

(Note: DI is not the only way to achieve IoC. There are other ways as well.) By DI, the responsibility of creating objects is shifted from our application code to the Spring container; this phenomenon is called IoC. Dependency Injection can be done by setter injection or constructor injection.

What is @configuration in spring boot?

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.

What is @bean in spring boot?

Spring @Bean annotation tells that a method produces a bean to be managed by the Spring container. It is a method-level annotation. During Java configuration ( @Configuration ), the method is executed and its return value is registered as a bean within a BeanFactory .

How can you configure Spring in your application?

There are three ways to define configuration, available in Spring 4 by default:

1. xml-based configuration, when you describe configuration in xml file;
2. java-based configuration, when configuration is Java class, marked with specific annotations;
3. groovy-based configuration, when configuration is file with Groovy code;