protected TSnapshot ProcessEvents <TSnapshot>(
FileSystemConnectionContext connectionContext,
ISnapshotProcessor <TSnapshot> snapshotProcessor,
Action <FileSystemConnectionContext> dataInitializer)
where TSnapshot : Snapshot
{
_fileSystem.CreateDirectoryIfItDoesntExist(connectionContext.DataRoot);
var loadInfos = new Func <List <IFileSystemInfoWrapper> >(() =>
_fileSystem.GetFileInfos(connectionContext.DataRoot, "event-*.json")
.OrderBy(item => item.CreationTimeUtc)
.ToList());
var infos = loadInfos();
if (!infos.Any())
{
dataInitializer?.Invoke(connectionContext);
infos = loadInfos();
}
var shouldSaveSnapshot = false;
var snapshot = LoadSnapshot <TSnapshot>(connectionContext);
if (snapshot == null)
{
// dataInitializer?.Invoke(connectionContext);
snapshot = Activator.CreateInstance <TSnapshot>();
shouldSaveSnapshot = true;
}
foreach (var info in infos)
{
if (snapshot.LastFileCreationTimeUtc.HasValue && snapshot.LastFileCreationTimeUtc >= info.CreationTimeUtc)
{
continue;
}
shouldSaveSnapshot = true;
var contents = _fileSystem.ReadAllText(info.FullName);
snapshotProcessor.ProcessEvent(snapshot, contents, info.CreationTimeUtc);
}
if (shouldSaveSnapshot)
{
Insert(connectionContext, snapshot);
}
return(snapshot);
}
/// <summary>
/// Initializes this object
/// </summary>
/// <param name="snapshotProcessor">The snapshot processor</param>
public AggregateSavedEventHandler(ISnapshotProcessor snapshotProcessor)
{
_snapshotProcessor = snapshotProcessor;
}