Have a look at Google Gears it should be able to solve all your issues.
2009/5/25, vijay mymail.vi...@gmail.com:
HI All,I am working on a application using GWT and AppEngine (Java with
datastore) , got stuck in design phase.
The application need to take input from barcode reader and will fill up
some text boxes with information corresponding to the barcode. You can
assume it to be a bookstore selling application which can fill up the book
details like book name and price from the barcode when preparing the bill.
Now my worries are:
1. As the information can change on server by admin the individual seller
should be in sync with server. but it would be very time taking if for every
barcode readed I send a request to server so I think we should store the
information on client side and keep it in sync with the server as the
changes are not expected to be very often.
2. If I keep all information on client side it is not possible to keep all
barcodes information in memory as they can be in huge numbers may be
millions, is there a effective way to keep all information on client side or
any other way instead of storing it on client side.
3. Also i don't want my user to loose any information if there is any
disruption in internet connectivity.so can i use something like a offline
mode which will store all information locally if internet is not connected
and as soon as connection is there it gets sync with server similar to java
web start.
I am beginner, it would be great if you guys can tell me about any others
issues I should be aware of while developing such application with GWT and
AppEngine.
Thanks,
Vijay
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