/// <summary>
/// Loads the artifact operation from the underlying stream.
/// </summary>
/// <returns>The loaded artifact instance.</returns>
public ArtifactOperation Load()
{
var major = _serializer.Deserialize <int>(_stream);
var minor = _serializer.Deserialize <int>(_stream);
var build = _serializer.Deserialize <int>(_stream);
var revision = _serializer.Deserialize <int>(_stream);
var version = new Version(major, minor, build, revision);
if (version < TransactionStateVersion.v1)
{
throw new InvalidDataException("Version not supported: " + version);
}
var kind = _serializer.Deserialize <ArtifactOperationKind>(_stream);
switch (kind)
{
case ArtifactOperationKind.Create:
{
var expr = _serializer.Deserialize <Expression>(_stream);
var state = _serializer.Deserialize <object>(_stream);
return(ArtifactOperation.Create(expr, state));
}
case ArtifactOperationKind.DeleteCreate:
{
var expr = _serializer.Deserialize <Expression>(_stream);
var state = _serializer.Deserialize <object>(_stream);
return(ArtifactOperation.DeleteCreate(expr, state));
}
case ArtifactOperationKind.Delete:
return(ArtifactOperation.Delete());
default:
throw new NotSupportedException();
}
}
private Dictionary <string, ArtifactOperation> Coalesce(
IKeyValueStore keyValueStore,
IList <ITransactionLog> logs,
Func <ITransactionLog, IKeyValueTable <string, ArtifactOperation> > tableSelector)
{
var result = new Dictionary <string, ArtifactOperation>();
foreach (var log in logs)
{
var table = tableSelector(log);
using var tx = keyValueStore.CreateTransaction();
var txTable = table.Enter(tx);
foreach (var item in txTable)
{
if (result.TryGetValue(item.Key, out ArtifactOperation op))
{
Tracing.Transaction_Log_Coalesce(null, _parent._engineId, item.Key, op.OperationKind.ToString(), item.Value.OperationKind.ToString());
//
// SECOND
//
// Create Delete DeleteCreate
// +--------------+--------------+--------------+
// F Create | Invalid | No-op | Create |
// I +--------------+--------------+--------------+
// R Delete | DeleteCreate | Invalid | Invalid |
// S +--------------+--------------+--------------+
// T DeleteCreate | Invalid | Delete | DeleteCreate |
// +--------------+--------------+--------------+
//
switch (op.OperationKind)
{
case ArtifactOperationKind.Create:
switch (item.Value.OperationKind)
{
case ArtifactOperationKind.Create:
UpdateInvalidReplays(item.Key, item.Value, result, _invalidReplaySequence);
break;
case ArtifactOperationKind.Delete:
result.Remove(item.Key);
break;
case ArtifactOperationKind.DeleteCreate:
result[item.Key] = ArtifactOperation.Create(item.Value.Expression, item.Value.State);
break;
}
break;
case ArtifactOperationKind.Delete:
switch (item.Value.OperationKind)
{
case ArtifactOperationKind.Create:
result[item.Key] = ArtifactOperation.DeleteCreate(item.Value.Expression, item.Value.State);
break;
case ArtifactOperationKind.Delete:
UpdateInvalidReplays(item.Key, item.Value, result, _invalidReplaySequence);
break;
case ArtifactOperationKind.DeleteCreate:
UpdateInvalidReplays(item.Key, item.Value, result, _invalidReplaySequence);
break;
}
break;
case ArtifactOperationKind.DeleteCreate:
switch (item.Value.OperationKind)
{
case ArtifactOperationKind.Create:
UpdateInvalidReplays(item.Key, item.Value, result, _invalidReplaySequence);
break;
case ArtifactOperationKind.Delete:
result[item.Key] = item.Value;
break;
case ArtifactOperationKind.DeleteCreate:
result[item.Key] = item.Value;
break;
}
break;
}
}
else
{
result.Add(item.Key, item.Value);
}
}
}
return(result);
}