GWT: Our Experiences

2008.5.17 馮彥文

About Me 馮彥文 a.k.a Tempo

Twitter: tempofeng Blog: run, tempo, run (google: tempo) Liquable Inc: [email protected]

活動 Happyweb: http://happyweb.tw Java User Group: http://www.javaworld.com.tw

Agenda GWT & Features Communicate With Others Systems,

Frameworks Pitfalls

Google Web Toolkit

Writing AJAX Applications in

Java

CSS

GWT Class Library

JavaScriptGWT

Compiler

Java Source Code

Module.xml

EntryPoint

HTML

Hello World Demo

Swing, SWT Like Programming

Model

Components,Containers,Events, …

Composite Widget

Widget Demo

Hosted Mode /No-Server Mode

No-Server Mode Demo

Scalability

Stateless Servers,

Stateful Clients

Business Logic as Well

History Management

History Demo

JUnit Integration

Open Source(Apache 2.0 License)

Comparison DWR

Best for communicating with Java server, No UI components

Dojo Hard, less document but powerful

Ext-js Nice UI, less document, license issue

Jquery No UI components

Communication With Others Systems,

Frameworks

GWT Scripts Can Be Used as

XSS

Client

GWT-RPC Server 2

WEB Server

GWT-RPC Server 1

RPC HTTP

RequestBuilder GWT-RPC

Easy for Java servers JSON Rest (XML)

JavaScripts JavaScript Native Interface (JSNI) GWT-API-Interop

http://code.google.com/p/gwt-api-interop/

Web Pages gwt-params

Pitfalls

Value Objects

Hibernate Obj (PersistList,

…)

Value Obj

Value Obj(JavaScript)

GWT JavaScript

Tranform

GWT-RPC

Use

Java

JavaScript

Value Objects Same as other serialization framework Data-binding

Hibernate4get http://hibernate4gwt.sourceforge.net/

XSTM http://www.xstm.net/

SEO? Decorate output page, don’t cloak

SEO? Based on GWT Output

Project Structure

Gwt-maven http://code.google.com/p/gwt-maven/

Copy generated JavaScript to src in webapp

Page Layout

VerticalContainer, HorizontalContain

er Are Using Tables

JDK 1.4 Only For client codes only Wait for GWT 1.5

Missing Classes Reflection GWTx

http://code.google.com/p/gwtx/ Gwittir

http://code.google.com/p/gwittir/

Thank You!