Can the delete operation be considered idempotent without side effects on repeated calls?

JSESSIONID is a session identifier created by Java EE servers (like Tomcat) for each user upon first access to a web application. This ID is stored in a cookie named JSESSIONID and sent to the client.

When the client makes subsequent requests, the browser automatically sends this cookie back to the server. The server uses the JSESSIONID value to find the corresponding user session, which stores state information (e.g., login data, shopping cart).

Example:

// Getting session in a servlet
HttpSession session = request.getSession();
// session.getId() returns the JSESSIONID value

If cookies are disabled, the session ID can be passed via URL, but this is less secure and convenient.