Struts presentation

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Struts

Web Technologies – Struts – WS 2010/11

Felix Matenaar, Ivan GolodPatrick Schlebusch, Petru Nicolaescu

18.11.10 Web Technologies

History

Server-side for dynamic web pages and web applications:

Common Gateway Interface – CGI

Overloaded server

ISAPI and Apache DSO

ASP

Java

JavaServer Pages – JSP

Java servlets

Web Technologies1


Motivation Model 1:

JSP handles all responsibilities:

Processing request

Validating data

Handling business logic

Generating response

Good for small projects

Disadvantage:

Page design is intermixed with business logic

Inadmissible for big projects

Web Technologies2

Web Technologies3 22.11.2010 Web Technologies

MVC

ViewModel

Controller

Model 2:

Separates display of content from business logic

Model-View-Controller Pattern

Invented in Smalltalk at Xerox

Model - behavior and data

View - renders the model

Controller – receives input and initiates a response


What is Struts?

Framework for MVC in Java Web Applications

Components:

Extensible controller implementation Front controller

Own servlets realize actual functionality

Tag libraries for the JSPs HTML Forms

Internationalization

AJAX

Web Technologies4


MVC In Struts

Web Technologies5

View

JSPTags

Model

Java Beans

Controller

ActionServlet

Actionstruts-config.xml

ActionForm


Architecture & Request Life Cycle

Web Technologies6

Front Controller Action

Template(e.g. JSP)

Configuration

request

response Provided by Struts

Created by developer

Interceptor (Struts 2)

Tags

result


Action; Action Form The Action class

execute() : ActionForward

ActionForward, associated with current request

Configuring the action classes

The ActionForm

Associated with html form

Respects JavaBean specification

Web Technologies7


Configuration File: struts-config.xml

Available under “WebContent\WEB-INF”

ActionForm declaration

Action Mappings

General mapping

any request to a resource with .do extension will be taken by Struts’ ActionServlet

Web Technologies8

A whole bunch of frameworks

Web Technologies9

DjangoRuby on Rails

Zend

Solarphp

Typo3

Google Web Tookit

StrutsWeb2py

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Criteria

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performance

user feeling

infrastructure costs

security

availability

data loss → image loss

development speed

time to market

always offer latest technology

Not only the framework design but also the programming

Language influence the applicability

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Cursory comparison

Web Technologies11

Criteria Struts Django Zend Rails

Language Java Python PHP Ruby

Typing Strict Duck Duck Duck

Concept MVC MVC MVC MVC

Performance ++ - - -

Security o + - - ++

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Summary

Big projects should separate

business logic and presentation

Struts is an MVC framework

Java

Scalable

Controller -> Actions

View -> JSP

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The end

Thank you!

18.11.10


Literature

http://struts.apache.orgFramework Download, Documentation, Tutorials, etc..

Ian Roughley - „Starting With Struts 2“(http://www.infoq.com/minibooks/starting-struts2)

James Holmes - „Struts: The Complete Reference“

http://www.javauc.com/java/727

Technology

Struts presentation