public EventStream Load(IIdentity id)
{
Condition.Requires(id, "id").IsNotNull();
NamedDataSet data = AppendOnlyStore.Load(id.Literal);
if (data == null)
{
return(null);
}
List <IEvent> events = new List <IEvent>(data.Data.Select(d => (IEvent)Serializer.Deserialize(d)));
EventStream s = new EventStream(data.Version, events);
return(s);
}
public void Append(string name, byte[] data, long expectedVersion)
{
lock (StreamsLock) // Not the best performing thing to do, but who cares with this not-for-production implementation ...
{
NamedDataSet entry;
if (!Streams.TryGetValue(name, out entry))
{
entry = new NamedDataSet(name);
Streams[name] = entry;
}
if (entry.Version != expectedVersion)
throw new VersionConflictException(expectedVersion, entry.Version, name);
entry.Data.Add(data);
entry.Version++;
Events.Add(new DataItem(Events.Count+1, name, data));
}
}
public void Append(string name, byte[] data, long expectedVersion)
{
lock (StreamsLock) // Not the best performing thing to do, but who cares with this not-for-production implementation ...
{
NamedDataSet entry;
if (!Streams.TryGetValue(name, out entry))
{
entry = new NamedDataSet(name);
Streams[name] = entry;
}
if (entry.Version != expectedVersion)
{
throw new VersionConflictException(expectedVersion, entry.Version, name);
}
entry.Data.Add(data);
entry.Version++;
Events.Add(new DataItem(Events.Count + 1, name, data));
}
}
public NamedDataSet Load(string name)
{
NamedDataSet result = new NamedDataSet(name);
LoadCommand.Parameters["@name"].Value = name;
using (SqlDataReader r = LoadCommand.ExecuteReader())
{
while (r.Read())
{
byte[] data = (byte[])r["Data"];
long version = (long)r["Version"];
result.Data.Add(data);
result.Version = version; // Ends up getting the last (biggest) value
}
}
return result;
}
