public static void CreateRevision(DynamicTableEntity letter_entity, string board_id, string discussion_id,
string letter_id, int version)
{
string partition_key = SandId.CombineId(board_id, discussion_id, letter_id);
DynamicTableEntity entity = new DynamicTableEntity(partition_key, SandId.MakeRevisionId(version));
LetterConverter.CopyLetterRevision(letter_entity, entity, version);
Warehouse.RevisionTable.Execute(TableOperation.Insert(entity)); // If an exception is thrown after revision created but before edit count in letter entity is updated, next time edit will fail because the revision already exists.
}
public static void CreateActivity(string partition_key, string[] properties, object[] values)
{
int version = VersionCounterStore.Next(Warehouse.ActivityTable, partition_key);
DynamicTableEntity entity = new DynamicTableEntity(partition_key, SandId.MakeRevisionId(version));
for (int i = 0; i < properties.Length; i++)
{
if (values[i] is string)
{
entity[properties[i]] = new EntityProperty((string)values[i]);
}
else
{
throw new ProgramLogicException();
}
}
Warehouse.ActivityTable.Execute(TableOperation.Insert(entity)); // 409 conflict exception if already exists.
}
public static void CreateHistory(DynamicTableEntity src_entity, string partition_key, int version, params string[] properties_to_copy)
{
DynamicTableEntity dst_entity = new DynamicTableEntity(partition_key, SandId.MakeRevisionId(version));
CreatorConverter.CopyEntity(src_entity,
CreatorConverter.Status.Editor,
dst_entity,
CreatorConverter.Status.Editor);
foreach (string property_name in properties_to_copy)
{
EntityProperty ep;
if (src_entity.Properties.TryGetValue(property_name, out ep))
{
dst_entity[property_name] = ep /*src_entity[property_name]*/;
}
}
Warehouse.HistoryTable.Execute(TableOperation.Insert(dst_entity));
}
public static int Next(CloudTable table, string partition_key)
{
TableResult result = table.Execute(TableOperation.Retrieve(partition_key, SandId.MakeRevisionId(0)));
DynamicTableEntity entity = (DynamicTableEntity)result.Result;
if (entity == null)
{
return(0);
}
EntityProperty ep;
int version = 1;
if (entity.Properties.TryGetValue("nextid", out ep))
{
version = (int)ep.Int32Value;
ep.Int32Value = version + 1;
}
else
{
entity["nextid"] = new EntityProperty(version + 1);
}
table.Execute(TableOperation.Merge(entity));
return(version);
}