Xtensive.Orm.Tracking

Summary

Provides tracking/auditing funtionality on Session/Domain level.

Prerequisites

DataObjects.Net 7.1.x or later (http://dataobjects.net)

Implementation

1. Include types from Xtensive.Orm.Tracking assembly into the domain:

<Xtensive.Orm> <domains> <domain ... > <types> <add assembly="your assembly"/> <add assembly="Xtensive.Orm.Tracking"/> </types> </domain> </domains> </Xtensive.Orm>

2. To track changes on Session level obtain an instance of ISessionTrackingMonitor through Session.Services.Get<ISessionTrackingMonitor>() method; to track changes on Domain level (from all sessions) obtain an instance of IDomainTrackingMonitor through Domain.Services.Get<IDomainTrackingMonitor>() method
3. Subscribe to TrackingCompleted event. After each tracked transaction is committed you receive the TrackingCompletedEventArgs object.
4. TrackingCompletedEventArgs.Changes contains a collection of ITrackingItem objects, each of them represents a set of changes that occured to an Entity within the transaction committed.

Demo

First, subscribe to the TrackingCompleted event of ISessionTrackingMonitor / IDomainTrackingMonitor

var monitor = Domain.Services.Get<IDomainTrackingMonitor>(); monitor.TrackingCompleted += TrackingCompletedListener;

Then, do some changes to persistent entities

using (var session = Domain.OpenSession()) { using (var t = session.OpenTransaction()) { var e = new MyEntity(session); e.Text = "some text"; t.Complete(); } }

And handle event call and do whatever you want with tracked changes.