Document Refresh

To refresh a document, add a @refresh flag to a document's metadata with a value of type DateTime (this must be in UTC format, i.e. DateTime.UtcNow). This specifies when the document should be refreshed.

This will cause the document to refresh only once! The refresh operation removes the @refresh flag.

The exact time that the document refreshes is not determined by the value of @refresh - rather, the server refreshes documents at regular intervals determined by the Refresh Configuration. The default interval is 60 seconds.

Refreshing a document causes its change vector to increment the same way it would after any other kind of update to the document. This triggers any features that react to documents updating, including but not limited to:

• The document is re-indexed by any indexes that cover it.
• Replication, Subscriptions, and ETL are triggered.
• A revision of the document is created.

To activate and/or configure document refreshing, the server needs to be sent a RefreshConfiguration object using a ConfigureRefreshOperation operation.

RefreshConfiguration Object

public class RefreshConfiguration
{
    public bool Disabled { get; set; }
    public long? RefreshFrequencyInSec { get; set; }
}

Studio

Alternatively, document refreshing can also be configured in the studio, under Settings > Document Refresh.

NoSQL DB Server - Document Refresh

Example I

How to set refresh configuration for a database:

var refreshConfig = new RefreshConfiguration
{
    Disabled = false,
    RefreshFrequencyInSec = 300
};

var result = documentStore.Maintenance.Send(new ConfigureRefreshOperation(refreshConfig));

This activates document refreshing and sets the interval at 5 minutes.

Example II

How to set a document to refresh 1 hour from now:

using (var session = documentStore.OpenSession())
{
    var document = session.Load<object>("users/1-A");

    session.Advanced.GetMetadataFor(document)["@refresh"] = DateTime.UtcNow.AddHours(1);

    session.SaveChanges();
}