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This presentation is about Spring MVC. Topics covered in this session are:
1. HTTP Servlet
2. What is Spring MVC?
3. MVC Architecture
4. Request Processing Workflow in Spring MVC
5. Spring Web Application Context
6. Spring MVC Configuration
7. Important Annotations
slides contains all about the ASP.NET MVC 5 based contents, and hopefully this will also guide you how to a write the MVC program using .NET Technology
This presentation is about Spring MVC. Topics covered in this session are:
1. HTTP Servlet
2. What is Spring MVC?
3. MVC Architecture
4. Request Processing Workflow in Spring MVC
5. Spring Web Application Context
6. Spring MVC Configuration
7. Important Annotations
slides contains all about the ASP.NET MVC 5 based contents, and hopefully this will also guide you how to a write the MVC program using .NET Technology
5.1 Identify the interface and methods for each of the following:
Retrieve a session object across multiple requests to the same or different servlets within the same WebApp
Store objects into a session object
Retrieve objects from a session object
Respond to the event when a particular object is added to a session
Respond to the event when a session is created and destroyed
Expunge a session object
5.2 Given a scenario, state whether a session object will be invalidated.
5.3 Given that URL rewriting must be used for session management, identify the design requirements on sessionrelated HTML pages.
In this session, you will learn about what are sessions, cookies, how we can implement authentication in nodejs. And will also see about the CSRF attacks.
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We all have good and bad thoughts from time to time and situation to situation. We are bombarded daily with spiraling thoughts(both negative and positive) creating all-consuming feel , making us difficult to manage with associated suffering. Good thoughts are like our Mob Signal (Positive thought) amidst noise(negative thought) in the atmosphere. Negative thoughts like noise outweigh positive thoughts. These thoughts often create unwanted confusion, trouble, stress and frustration in our mind as well as chaos in our physical world. Negative thoughts are also known as “distorted thinking”.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
How to Split Bills in the Odoo 17 POS ModuleCeline George
Bills have a main role in point of sale procedure. It will help to track sales, handling payments and giving receipts to customers. Bill splitting also has an important role in POS. For example, If some friends come together for dinner and if they want to divide the bill then it is possible by POS bill splitting. This slide will show how to split bills in odoo 17 POS.
The Indian economy is classified into different sectors to simplify the analysis and understanding of economic activities. For Class 10, it's essential to grasp the sectors of the Indian economy, understand their characteristics, and recognize their importance. This guide will provide detailed notes on the Sectors of the Indian Economy Class 10, using specific long-tail keywords to enhance comprehension.
For more information, visit-www.vavaclasses.com
2. Session in Servlets
HTTP is a stateless protocol. All requests and responses are
independent. But sometimes you need to keep track of
client's activity across multiple requests. For eg. When a
User logs into your website, not matter on which web page
he visits after logging in, his credentials will be with the
server, until he logs out. So this is managed by a session.
The basic concept behind session is, whenever a user starts
using our application, we can save a unique identification
information about him, in an object which is available
throughout the application, until its destroyed. So wherever
the user goes, we will always have his information and we
can always manage which user is doing what. Whenever a
user wants to exit from your application, destroy the object
with his information.
3. How Session Works
Session is used to store everything that we can get from the client
from all the requests the client makes
4. Lifecycle of HttpSession?
HttpSession object is used to store entire session with a
specific client. We can store, retrieve and remove attribute
from HttpSession object. Any servlet can have access to
HttpSession object throughout the getSession() method of
the HttpServletRequest object.
• On client's first request, the Web Container generates a
unique session ID and gives it back to the client with
response. This is a temporary session created by web
container.
• The client sends back the session ID with each request.
Making it easier for the web container to identify where
the request is coming from.
• The Web Container uses this ID,finds the matching session
with the ID and associates the session with request .
7. Session Management
Session Management is a mechanism used by
the Web container to store session information
for a particular user. There are four different
techniques used by Servlet application for session
management.
They are as follows-
• Cookies
• Hidden form field
• URL Rewriting
• HttpSession
8. 1.Cookies
Cookies are small pieces of information that are sent
in response from the web server to the
client. Cookies are the simplest technique used for
storing client state.
Cookies are stored on client's computer. They have a
lifespan and are destroyed by the client browser at
the end of that lifespan.
Using Cookies for storing client state has one
shortcoming though, if the client has turned of
Cookie saving settings in his browser then, client
state can never be saved because the browser will
not allow the application to store cookies.
9. Advantages and Disadvantages of Cookies
Advantages
• Simplest technique of maintaining the state.
• Cookies are maintained at client side.
• Cookie information can be extracted from the
client request using getCookies() of
HttpSevletRequest
Disadvantages
• It will not work if cookie is disabled from
the browser.
• Only textual information can be set in
Cookie object.
10. 2.URL Rewriting for Session Management
If the client has disabled cookies in the browser then session
management using cookie wont work. In that case URL
Rewriting can be used as aback up. URL rewriting will always
work.
In URL rewriting, a token(parameter) is added at the end of
the URL. The token consist of name/value pair separated by
an equal(=) sign.
For Example:
11. Advantages:
• It will always work whether cookie is disabled
or not (browser independent).
• Extra form submission is not required on each
pages.
Disadvantages:
• It will work only with links.
• It can send Only textual information.
Advantages and Disadvantages of URL Rewriting
12. 3.Hidden Form Field for Session Management
Hidden form field can also be used to store session
information for a particular client. In case of hidden
form field a hidden field is used to store client
state. In this case user information is stored in
hidden field value and retrieved from another
servlet.
This approach is better if we have to submit form in
all the pages and we don't want to depend on the
browser
13. Advantages:
• It will always work whether cookie is disabled or
not.
• Inserting a simple HTML Input field of type hidden
is required. Hence, its easier to implement.
Disadvantages:
• It is maintained at server side.
• Extra form submission is required on each pages.
• Only textual information can be used.
Advantages and Disadvantages of Hidden Form Field
14. 4. HTTP Session Management
In this case, container creates a session id for each user.
The container uses this id to identify the particular user.An
object of HttpSession can be used to perform two tasks:
• bind objects
• view and manipulate information about a session, such
as the session identifier, creation time, and last
accessed time.
15. Advantages:
• It stores user states and data to all over the application.
• Stores every user data separately.
• Session is secure and transparent from user because
session object is stored on the server
Disadvantages:
• Performance overhead in case of large number of user,
because of session data stored in server memory.
Advantages and Disadvantages of HTTP Session
16. Example for demonstrating usage of
HttpSession
Following pages are used for Demonstrating
HTTP Session
• Index.html
• Validate.java
• Welcome.java
• web.xml