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WebWork in Action

An introduction to WebWorkPatrick A. Lightbody

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Introduction

WebWork: an OpenSymphony project What is WebWork?

What is OpenSymphony? Who is Patrick? omparison to other !eb "rame!orks

Struts #apestry

$S%

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e&ook no!a'ai(ab(e

Print 'ersionready )any dayno!*

Ask +uestions, get a "reecopy-

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)Wo!* eamp(e

/etting started has ne'er been easier

0emonstration o": In'ersion o" ontro( #emp(ate (ibrary

#ype con'ersion

1a(idation

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O'er'ie!: WebWork2

Is bui(t upon the ommand Pattern

Works !ith PO$Os

3ses O/4L "or epression (anguage and typecon'ersion

5as an ad'anced 'a(idation "rame!ork

Inc(udes an etensib(e !idget system

Supports many 'ie! techno(ogies: $SP6%ree7arker6 1e(ocity6 $asper8eports6 9SL#6 etc

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ore concepts

#hree key pieces:Actions PO$Os6 ActionSupport;

8esu(ts

Interceptors

4o )"orm beans*: the action is the mode(

1a(ue stack a((o!s (oose coup(ing Interceptors: )AOP (ite*

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/etting started

#!o options: Standard ser'(et

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Ser'(et container

>'erything starts !ith the %i(ter0ispatcher

#he %i(ter0ispatcher is responsib(e "or: >ecuting actions Ser'ing static content A$A9,re(ated "i(es;

#he in'ersion o" contro( )re+uest* scope

(eaning up the Actionontet #hreadLoca(;

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!eb.m(

"i(ter@

"i(ter,name@!eb!ork"i(ter,name@

"i(ter,c(ass@2.%i(ter0ispatcher"i(ter,c(ass@

"i(ter@"i(ter,mapping@

"i(ter,name@!eb!ork"i(ter,name@

ur(,pattern@Bur(,pattern@

"i(ter,mapping@

(istener@

(istener,c(ass@2.Li"ecyc(eListener(istener,c(ass@

(istener@

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)Prototype*

Is the +uickest !ay to get started Is inspired by App%use6 8uby on 8ai(s

Is po!ered by a bui(t,in $etty ser'er Automatica((y compi(es your source "i(es /ets your started in three steps:

3nCip !eb!ork,

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!ork.m(

on"iguration "or actions6 resu(ts6 andinterceptors

Support "or packages and packageinheritence

Optiona( mapping to namespaces

Additiona( "i(es can be inc(uded usinginc(ude@

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!ork.m( >amp(e

!ork@

inc(ude "i(eDE!eb!ork,de"au(t.m(E@

package nameDEde"au(t*

etendsDE!eb!ork,de"au(tE@ action nameDE(istPeop(eE c(assDEListPeop(eE@

resu(t@(istPeop(e."t(resu(t@

action@

package@

!ork@

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1a(ue stack

A(( epressions !ork against the 'a(uestack

Actions are pushed on the stack be"oreanything e(se happens

Additiona( objects6 such as those in an

interator or action chaining6 can be pusheddo!n

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#ype con'ersion

5##P is not a!are o" data types2 2 but $a'a is-

WebWork he(ps by (etting you !ork !ith yourra! PO$Os rather than type(ess intermediate

objects "orm beans;.

5e(ps !ith simp(e con'ersion primiti'es;as !e(( as comp(e PO$Os andco((ections;

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#ype con'ersion eamp(es

String ,@ int input nameD)id*@

StringFG ,@ ListString@ input nameD)name*@

omp(e types

input nameD)person.id*@ input nameD)peop(eFHG.id*@

input nameD)person."riends.name*@

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1a(idation

Abstracts 'a(idation ru(es "rom core code

ommon ru(es a'ai(ab(e re+uired6 rege6

date range6 etc; Sames ru(es !ork !ith c(ient,side

'a(idation using A$A9 ,, see my other

presentation "or more in"o;

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#emp(ate (ibrary

P(at"orm to create reusab(e 3I !idgets

%orm contro(s pro'ided out o" the bo

/roups o" temp(ates "orm )themes* #he )htm(* theme is simp(e t!o,co(umn

(ayout

#hemes can etend each other aja ,@ htm( ,@ simp(e

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The xhtml theme extends the

simple theme and provides a

standard two-columnlayout

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3ses o" interceptors

Pro'ide 'ery core "eatures "or WebWork: Logging

App(ying 5##P re+uest parameters

In'oking Io

In'oking the 'a(idation "rame!ork

A(so pro'ide ad'anced "unctiona(ity2

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0emo2

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Wrapping up

Prototype is a great !ay to get started 3ti(iCe the temp(ates create your o!n

themes #ype con'ersion bridges the gap bet!een

5##P and $a'a

3se the 'a(idation "rame!ork especia((y!ith A$A9; 3ti(iCe interceptors !hen appropriate

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Juestions?