/// <summary>
/// Create from an existing model by writing a snapshot
/// </summary>
/// <typeparam name="TModel"></typeparam>
/// <param name="model"></param>
/// <param name="config"></param>
/// <returns></returns>
public static Engine <TModel> Create <TModel>(TModel model, EngineConfiguration config = null) where TModel : Model
{
config = config ?? EngineConfiguration.Create();
if (!config.Location.HasJournal)
{
config.Location.SetLocationFromType <TModel>();
}
ISnapshotStore store = config.CreateSnapshotStore();
store.WriteSnapshot(model);
return(Load <TModel>(config));
}
/// <summary>
/// Writes a snapshot reflecting the current state of the model to the associated <see cref="ISnapshotStore"/>
/// <remarks>The snapshot is a read operation blocking writes but not other reads (unless using an ImmutablilityKernel).</remarks>
/// </summary>
public void CreateSnapshot()
{
ulong revision = 0;
_kernel.Read(model =>
{
revision = model.Revision;
_snapshotStore.WriteSnapshot(model);
_journalAppender.Handle(new SnapshotCreated(revision));
});
if (_config.TruncateJournalOnSnapshot)
{
_commandStore.Truncate(revision);
}
}
/// <summary>
/// Writes a snapshot reflecting the current state of the model to the associated <see cref="ICommandStore"/>
/// <remarks>The snapshot is a read operation blocking writes but not other reads (unless using an ImmutablilityKernel).</remarks>
/// </summary>
public void CreateSnapshot()
{
_kernel.Read(model => _snapshotStore.WriteSnapshot(model));
}