web toolkit julie george & ronald lopez 1. requirements java sdk version 1.5 or later apache...

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Web ToolkitJulie George & Ronald Lopez

Requirements

Java SDK version 1.5 or laterApache Ant is also necessary to run command

line arguments

Can use any Java IDEDownload Google Web toolkit

Major Components

SDK contains the Java API libraries, compiler, and development server.

GWT Designer: User friendly IDE (like .NET) for generating UI code (works on top of Eclipse)

Speed Tracer (Profiler Tool) Plugin for Eclipse: Allows for easy deployment

to Google’s app engine

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Features

Compile your Java code into highly optimized JavaScript

Debug.Run in multiple browsers.GWT compiler performs optimization– -inlining methods,dead code, optimize strings,split

points in the code

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How it works(write-debug-optimize-run)

1. unzip gwt-2.4.0.zip

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How it works(write-debug-optimize-run)

webAppCreator -out MyWebApp com.mycompany.mywebapp.MyWebApp

Run locally in development mode

cd MyWebApp/ ant devmode

Run locally in development mode

Files Created

ant build

Host page : Code executes in this html file.

Files Created

<entry-point class='com.mycompany.mywebapp.client.MyWebApp'/>

<!-- Specify the paths for translatable code --> <source path='client'/> <source path='shared'/>

Files Created

Deployment Descriptor

Files Created

ScriptsEclipseSlide 10 Host page

Java source code

Communicating with the Server

Making Remote Procedure Calls (GWT RPC)Retrieving JSON Data via HTTPMaking Cross-Site Requests for JSONPMaking Asynchronous Calls

– GWT RPC is a mechanism for passing Java objects to and from a server over standard HTTP

Deployment

Ant Build or R-click project->Google->GWT compile

Files are output to the WAR folder in your project

Deploy to Google’s App Engine– Plugin– Command line program

QUESTIONS?Then End…