What is session management in Java?

Session Tracking is a way to maintain state (data) of an user. It is also known as session management in servlet. Each time user requests to the server, server treats the request as the new request. So we need to maintain the state of an user to recognize to particular user.

What is session management in JSP?

The JSP engine exposes the HttpSession object to the JSP author through the implicit session object. Since session object is already provided to the JSP programmer, the programmer can immediately begin storing and retrieving data from the object without any initialization or getSession(). Samual Sam.

What are the four different ways of session management?

There are four main ways to manage Session in Java Web application written using Servlet and JSP.

• URL rewriting.
• Cookies.
• Hidden Form fields.
• HTTPS and SSL.

What is HTTP session management?

Session management is the rule set that governs interactions between a web-based application and users. Browsers and websites use HTTP to communicate, and a web session is a series of HTTP requests and response transactions created by the same user.

Is the session thread safe, are set / get attribute thread?

The session is not thread safe and neither the get not the set methods are guaranteed to be thread safe. In general in a servlet container you should assume to be in a multi threaded environment and no provided tooling is safe. This also goes for the objects you store in the session.

Are there two threads accessing the same session?

As Eddie points out, one situation where you may face two thread accessing the same session is two ajax calls are attempting to modify the same session attribute. Otherwise you won’t have problems. Is this answer outdated?

Is it safe to synchronize session objects in Java?

Synchronization of your session objects will make the application safer against future changes that make your web application capable of having multiple simultaneous requests, so it’s not a bad idea.

How is HttpSession not thread safe from Java Ranch?

How HttpSession is not thread safe from Java Ranch might be helpful, too. Is this answer outdated? Multiple servlets executing request threads may have active access to the same session object at the same time.