Book Image

ColdFusion 9 Developer Tutorial

By : John Farrar
Book Image

ColdFusion 9 Developer Tutorial

By: John Farrar

Overview of this book

Adobe ColdFusion is an application server, renowned for rapid development of dynamic websites, with a straightforward language (CFML), powerful methods for packaging and reusing your code, and AJAX support that will get developers deep into powerful web applications quickly. However, developing rich and robust web applications can be a real challenge as it involves multiple processes.With this practical guide, you will learn how to build professional ColdFusion applications. Packed with example code, and written in a friendly, easy-to-read style, this book is just what you need if you are serious about ColdFusion.This book will give you clear, concise, and practical guidance to take you from the basics of ColdFusion 9 to the skills that will make you a ColdFusion developer to be reckoned with. It also covers the new features of ColdFusion 9 like ORM Database Interaction and CF Builder.ColdFusion expert John Farrar will teach you the basics of ColdFusion programming, application architecture, and object reuse, before showing you a range of topics including AJAX library integration, RESTful Web Services, PDF creation and manipulation, and dynamically generated presentation files that will make you the toast of your ColdFusion developer town.This book digs deep with the basics, with real-world examples of the how and whys, to get more done faster with ColdFusion 9.
Table of Contents (22 chapters)
ColdFusion 9 Developer Tutorial
Credits
About the Author
About the Reviewers
Preface
Index

Life span


Each of our shared scopes has a life span. They come into existence at a given point, and cease to exist at a predictable point. Learning to recognize these points is very important. It is also the first aspect of "Scope".

The request scope is created when a request is made to your ColdFusion server from any source. This could either be a web browser, or any type of web application that can make an HTTP request to your server. Any variable placed into the request structure persists until the request processing is complete.

Variable persistence is the property of data remaining available for a set period of time. Without persistence, we would have to make information last by passing all the information from one web page to another, in all forms and in all links. You may have heard people say that web pages are stateless. If you have passed all the information into the browser, they would be closer to stateful applications, but would be difficult to manage. In this chapter, we will...