Different web applications are increasingly used for different application applications. Java is one of the languages with the greatest support for this application, or that ends up doing a lot of work for developers.
One of the many facilities that Java provides is the creation of Servlets in Web applications developed in this language.
A Servlet is nothing more than a type of Java object that extends the properties of a server that hosts an application, making it possible to easily open your application for communication via HTTP methods.
In this post I will talk a little about how you can apply this type of technology in your applications.
To make the understanding of Servlets a little more didactic, I always like to think of them as "mini servers", with very similar attributions and possibilities.
Once you implement a class in your application that extends the HttpServlet class, you release your Java Web application to receive HTTP requests natively. These requests can be of any type: GET, POST, PATCH, etc.c.
These requests can be used to transfer information to other systems, or they can be used internally in your application to facilitate communication and better deal with some specific (and often necessary) limitations of your application.
As in the case of a conventional server for your application, Servlets can be used to:
Redirect URLs within the application.
Implementation of accessing web pages (very easy to use together with JSP pages for example).
Receive calls to be used only in the backend of your application: registering a new user, making a query in some table of your database, etc.
Communicate with other Servlets within your own application.
An example of real application in the job market:
I myself have had the opportunity to work with Servlets. The demand we had was as follows:
We have a company process management system, this system is a web interface built in Java. We needed that, from an HTTP call made from the company's CRM (Customer Relationship Management) system, which is a completely separate system, a specific process was initiated within the process management system.
This is a clear example of Servlet application, so the opportunity arose to develop a Servlet in the process management tool that would wait for this call from the company's CRM system, handle this request and initiate the necessary processes from there.
Keep an eye out...
In the next post to be held here at Academic Tech I will demonstrate how to implement a Servlet in practice and receive a GET or POST call through it.
Thank you very much for accessing the post, see you soon.
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