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The query name must be unique for each logical query in your app. To use incremental sync, your server must return meaningful updatedAt values. Later pull operations retrieve only records after that timestamp. Each time a pull operation is triggered, the latest updatedAt timestamp from that result set is stored. If you use a non-null query name, the Azure Mobile SDK does an incremental sync. The first parameter to the pull operation is a query name. This push helps minimize conflicts between changes that are already queued and new data from the server. If a pull is executed against a table that has pending local updates, the pull first executes a push on the sync context. The pull operation pulls changed data from the service and stores it in the local store. Push operations are done before any pull operations. The pending change is sent to the service using a HTTP REST call, which in turn modifies your database. The push operation sends all pending changes in the operations queue to the service. Similarly, the local store is populated with new data only when you pull data. Nothing is sent to the service until there you push local changes.
Android apps italk sync code#
Your client code controls when local changes are synchronized with an Azure Mobile App service. A local store is associated with the sync context using an initialize method such as IMobileServicesSyncContext.InitializeAsync(localstore) in the. An operations queue is an ordered list of pending modifications that haven't been sent to the server yet. The sync context maintains an operation queue. What is a sync context?Ī sync context is associated with the MobileServiceClient to track data changes in sync tables. For example, use a version of SQLite with SQLCipher to produce an encrypted store. You can also implement your own local store.
Android apps italk sync Offline#
For more information, see Windows (UWP): Enable offline sync. Most platforms use SQLite for the local store, but iOS uses Core Data. What is a local store?Ī local store is the data persistence layer on the client device. Before any operations can be performed, the local store must be initialized. The local store can then be synchronized with the service at a later time. A sync table provides the same operations against a local database. The operation will fail if the device doesn't have a network connection. The Azure Mobile Apps SDKs provide an IMobileServiceTable that accesses the service directly.
Android apps italk sync how to#
The following tutorials show how to add offline sync to your mobile clients using Azure Mobile Apps:
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