Google Web Toolkit (GWT)
Google Web Toolkit (GWT)
"Architectural Impact on Enterprise Web Application"
First Generation
HTTP request (URL or Form posting)
W
W
HTTP response (HTML Document)
Client Tier
Server Tier
Data Tier
Web
CGI-Scripts
Data Source
2
First Generation
Shortcomings
lack of a coherent architectural model
? adhoc scripts development ? no interaction between scripts
evolution
? how do you evolve scripts? ? written in different languages
data/information sharing
? has to be via an external repository ? difficult to control transactions
3
First Generation
Shortcomings
security
? CGI based scripts still a nightmare for admins ? scripts are executed in native environment
server execution environment is directly exposed vulnerabilities in server code are also exposed
throughput
? a script launches a process ? so what?
tight coupling
? each view is coupled to its corresponding script
4
Second Generation
W
J
W
J
HTTP response (HTML Document)
Client Tier Presentation
Web
Server Tier
JEE Container
JEE Server
Servlet Services
JDBC
Data Tier
Data Source
5
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