Advanced java programming

Session Tracking

Smt M.Jeevana sujitha

Assistant Professor

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Department of Computer Science and Engineering

SRKR Engineering College, Bhimavaram, A.P. - 534204

OBJECTIVES

The Objective of this lecture is

• To learn about session tracking mechanism in servlets.

Session Tracking

are two types of

• Basically there protocols.
• Stateful protocol
• Stateless protocol

Session Tracking

• Stateful protocol: In this protocol, part of data is exchanged between client and server and these

protocols always keep tack of communication sessions.

Example: TCP

• Stateless protocol: In this protocol, part of data is

exchanged between client and server and these protocols can not remember previously held communications.

Example: HTTP

• But some times there is a need to keep track of previous communication sessions. In such situations we go for session tracking.

Session Tracking

• The session tracking is a mechanism by which we can keep track of previous sessions between server and the browser.
• For creating the sessions getSession() method can be used.
• This method returns the object which stores the bindings with the names that use this object.

• These bindings

getAttribute()

can be managed using and

setAttribute()

methods.

Session Tracking

things are

• In session tracking two playing an important role.

• One is HttpServletRequest interface which supports getSession() method.
• The another class is HttpSession class which supports the binding managing methods such as getAttribute() and setAttribute().

THANK YOU