/// <see cref="ITableStorageProvider.Update{T}"/>
public void Update <T>(string tableName, IEnumerable <CloudEntity <T> > entities, bool force)
{
lock (_syncRoot)
{
List <MockTableEntry> entries;
if (!_tables.TryGetValue(tableName, out entries))
{
throw new DataServiceRequestException("UPDATE: table not found.");
}
// verify valid data BEFORE updating them
if (entities.GroupJoin(entries, u => ToId(u), ToId, (u, vs) => vs.Count(entry => force || u.ETag == null || entry.ETag == u.ETag)).Any(c => c != 1))
{
throw new DataServiceRequestException("UPDATE: key not found or etag conflict.");
}
if (entities.GroupBy(e => ToId(e)).Any(id => id.Count() != 1))
{
throw new DataServiceRequestException("UPDATE: duplicate keys.");
}
// ok, we can update safely now
foreach (var entity in entities)
{
var etag = (_nextETag++).ToString();
entity.ETag = etag;
var index = entries.FindIndex(entry => entry.PartitionKey == entity.PartitionKey && entry.RowKey == entity.RowKey);
entries[index] = new MockTableEntry
{
PartitionKey = entity.PartitionKey,
RowKey = entity.RowKey,
ETag = etag,
Value = FatEntity.Convert(entity, DataSerializer)
};
}
}
}
static System.Tuple <string, string> ToId(MockTableEntry entry)
{
return(System.Tuple.Create(entry.PartitionKey, entry.RowKey));
}
