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Client Server Development – Problems in Supporting Different Wireless Platform

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The document discusses challenges in developing client-server applications for different wireless platforms like J2ME and BREW. Key problems include limitations of HTTP support, differences in platform specifications, and ensuring asynchronous operations complete within event handling callbacks. Well-designed protocols should use HTTP, avoid dependencies on unavailable services, and define custom request-response formats like XML to accommodate platform variability. Case studies demonstrate applications that synchronize phonebooks and upload photos across devices.

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Client Server Development – Problems in Supporting Different Wireless Platform
Agenda ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Introduction
Client Server Architecture ,[object Object],[object Object],[object Object],Server Client 1 Client 2 Client N CS Protocol
Clients ,[object Object],[object Object],[object Object],[object Object],Server
Server ,[object Object],[object Object],[object Object],Web Data Business DB DAO Layer
Client Server Protocol ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Wireless Platforms - Handsets ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Low Tier Mid Tier High Tier
Wireless Platforms – Mid tier Handsets ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Network-related Main Problems
MIDP Particularities ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
MIDP Particularities ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
BREW Particularities ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
BREW Particularities ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Client-Server Protocol Design
Which “low” level protocol to use? ,[object Object],[object Object],[object Object],First Choice: HTTP!!!
Which “low” level protocol to use? Can we use some high level protocol on top of HTTP or socket? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Which “low” level protocol to use? So, we are back to HTTP  ,[object Object]
How to specify your app protocol? ,[object Object]
Case Studies
Vivo Agenda ,[object Object],[object Object],[object Object],[object Object]
MotoPhoto ,[object Object]

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Client Server Development – Problems in Supporting Different Wireless Platform