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Online/offline database sync in Flash Builder

I am working on an AIR app which should work in both online and offline model (client side on Ipads). The user can do various actions, while offline and the results would get saved in a local DB. The same needs to get synced up with a MySql DB once the user goes online using PHP.

I am programming the UI in Flash builder (flex). The web database is written for Php/Mysql/Apache

I am looking for some tutorials / demos / how-to on the subject.

Thanks
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hugooguh
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hugooguh
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2 Solutions
 
johanntagleCommented:
Some ideas are described at http://forums.adobe.com/message/943813 but I think http://www.adobe.com/devnet/coldfusion/articles/offline_air_orm.html isthe starting point you are looking for.
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hugooguhAuthor Commented:
Thanks but I am looking for a solution in a Air/PHP/MySql environment.
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dgofmanCommented:
I am using AIR local SQLLIte DB
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hugooguhAuthor Commented:
How can you sync up the local SQLLite database with a distant MySql DB once the user goes online ?
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dgofmanCommented:
In AIR we have network monitoring API you can add listener and as soon as you will detect connection upload your file into server or create dump DB script
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hugooguhAuthor Commented:
I've requested that this question be deleted for the following reason:

No solution found
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dgofmanCommented:
Why do you want to close this question without explanation what is not working for you?
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hugooguhAuthor Commented:
Well, I still don’t know what is the best script/procedure/best practice to synchronize an Ipad/SQLLite to a distant Linux/MYSQL database. How does the Ipad application knows what is the newest data to Insert/update on both databases.

Maybe I’m not clear enough. I know my English is not optimal.

Thanks anyway
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dgofmanCommented:
hugooguh:
So you want to get logic how to handle changes from the tables on related to the database.
The common strategy to create an extra field as datatimestamp or versionId and when user submitting a value check his current record timestamp with version from a DB . If timestamp or versionId are diffrent bring popup dialog and inform an user
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hugooguhAuthor Commented:
Great! Thanks for the info. But what about the data updated by other users in the distant database. How can we refresh the local database efficiently (ie without importing all the data or comparing all the timestamps every time a user gets online?)
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dgofmanCommented:
The same logic what I describe before. If you are keeping an extra column (dateModified) as timestamp you have to make get all new records from DB by timestamp
SELECT * FROM TABLE WHERE DATE_MODIFIED > flexTimeStamp;
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dgofmanCommented:
So, you can accept #36981055 and #36972036
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