Issue
I have read that everytime an HTTP request is made to tomcat for a servlet it creates a new HTTPRequest Object and using that request object we can access session object and store information. This session object stores the information across multiple requests.
I want to understand if tomcat is creating a new HTTPRequest object for every request coming from a browser, then how it is able to attach same session object across multiple requests?
Solution
Apache is a servlet container. The servlet container is attached to a webserver which listens on HTTP requests on a certain port number, which is usually 80. When a client (user with a web-browser) sends a HTTP request, the servlet container will create new HttpServletRequest and HttpServletResponse objects and pass it through the methods of the already-created Filter and Servlet instances whose URL-pattern matches the request URL, all in the same thread.
The request object provides access to all information of the HTTP request, such as the request headers and the request body. The response object provides facility to control and send the HTTP response the way you want, such as setting headers and the body (usually with HTML content from a JSP file). When the HTTP response is committed and finished, then both the request and response objects will be trashed. Source : https://howtodoinjava.com/server/tomcat/a-birds-eye-view-on-how-web-servers-work/
Answered By - Elhoussine Zennati
