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Custom Sync Provider for a Database design that ONLY accepts/returns DataSet in Stored Procedures?

Unanswered Custom Sync Provider for a Database design that ONLY accepts/returns DataSet in Stored Procedures?

  • 2011年12月28日 上午 09:46
     
     
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    Hello,

    I am planning to write some Custom Sync Provider due to limitations posed by our Database designers. I am restricted to UPDATE/INSERT/DELETE/SELECT Tables only through stored procedure. Those stored procedures only accept/return DataSet.

    With such limitations, I can not allow Sync framework (and its SPs) to touch any of our Tables. Do I have to write Custom Provider or could I use SqlSyncProvider?

    Custom Sync Provider will serve as 'bridge' between Sync Framework implementation and our 'Atom based' SQL Server database design. Following lists Custom Sync Provider goals and scope:

    1. Custom Sync Provider will Sync molecules i.e. DataSet to proprietary 3rd Party database for large number of customers (30K+ customers overall in 2-3 years time span).
    2. Server side database only serve molecules i.e. DataSet and updates itself using molecules.
    3. Server side database does not have Primary Key and Foreign Key constraints.
    4. Only stored procedures can be used to server/update Atoms i.e. Tables.
    5. Custom Sync Provider design should be
      • Transaction based (To address data integrity requirements due to network failures)
      • Compression driven (To address client bandwidth requirements for large amount of data i.e. 200 transactions/hour/connector)
      • Batch oriented (To address chunk based downloads and resume on network failures)
      • Easy to deploy (To address simplicity requirement for non-technical customer base) 

    My platform:

    Server Side = WCF/Windows 2008/SQL Server 200/Sync 4 CTP

    Client Side = Silverlight/3rd Party Database

    Thanks,

    Rafey

     

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  • 2012年1月6日 上午 05:12
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    you have to write your own provider.
     
  • 2012年1月20日 下午 12:05
     
     
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    I would recommend you inherit the  DbServerSyncProvider and override the GetChanges() and ApplyChanges() method.

    But, i am wondering without Primary Key, how would you prevent data duplication and uniquely identify a record? You should add an identity column at least, and use it as primary key.

    You can Provider ur Stored procs in InsertCommand, DeleteCommand and UpdateCommand to update tables

    Provider SPs for SelectIncrementalInsert, SelectIncrementalUpdate and SelectIncrementalDelete to select changes to be downloaded to the clients

    For atmocity, its taken care of by sync framework. But, if you have Foreign key you might want to group the related tables in SyncGroup to ensure changes applied for the entire group or is rolled back.

    Batching is a good approach to prevent huge chunk of data being sent at once.

    As for compression, you have to take care of it in the class that implements the interface which your server exposes to the client. Similarly, you will have to make the changes in the client side code generated by svcutil.exe to ensure that both client and server understand each other.