Chapter 13 Web Application Infrastructure

Objectives Explain the components and purpose of a web application platform Describe several common webapp platforms Explain the nature and purpose of a webapp framework Describe several common webapp frameworks Explain the nature and purpose of a content management system Describe several common content management systems

Web Application Platform A webapp platform is the host environment for application development and operation The platform includes –operating system, web server, language support, database support Hardware Web Server Language Support Database Support Operating System Web Application platform

LAMP Linux, Apache, MySQL, PHP/Perl/Python The LAMP platform appeared in mid 1990's and has become very popular LAMP is open-source free software, which is one reason for its popularity

Microsoft /.NET All Microsoft products (licensed).NET supports multiple languages Runs primarily on Windows Server O/S

Sun Microsystems/Java EE Supports Java language development Supported by multiple operating systems Proprietary, free license

Web Application Framework A webapp framework is a set of tools that support webapp development with: –A standard design model (e.g., MVC) –User interface toolkit –Reusable components for common functions (authentication, e-commerce, etc.) –Database support –Support for distributed system integration

Web Application Framework Frameworks give application developers more powerful building blocks to work with

Java EE Java EE is based purely in the Java programming language Includes –Java Servlets –Java Server Pages –Java DataBase Connectivity –Java Server Faces –Enterprise Java Beans –etc.

.NET Framework.NET Framework is a Microsoft (licensed) product.NET supports many programming languages through its Common Language Runtime (CLR) system C#ASPVBC++ etc. CLR Intermediate Language CLR Interpreter compilation

Ruby On Rails Ruby: a dynamically typed object-oriented programming language Rails: a webapp framework, featuring: –automatic code skeletons –built-in testing features –object-relation mapping –default implementation of common webapp functions

Struts A webapp framework based on Java EE Features: –use of MVC design paradigm –Centralized XML-based application configuration that can define many functions –Action definitions link user interface events to Controller and View modules

Content Management System A CMS is a tool for creating, cataloging, and accessing documents (web pages)

Content Management System A CMS can streamline and automate the process of creating, approving, deploying, and retiring web content

Workflow Management A CMS can coordinate the steps involved in creating, editing, and approving web content within an organization

Content Management Systems Joomla! –open source, free –based on MySQL and PHP –supports web pages, RSS feeds, blogs, etc. Vignette –proprietary product –includes extensive workflow management support –integrates with related development tools

Web Application Software Stack The webapp software stack includes platform, framework, CMS, and application

Review Webapp Platforms –LAMP, Microsoft/.NET Sun/Java Webapp Frameworks –Java EE,.NET Framework, Ruby on Rails, Struts Content Management Systems –Joomla!, Vignette Webapp Software Stack