public async Task <KeyedItems <SerializedItemDescriptor> > GetAllAsync(DataKind kind)
{
var ret = new List <KeyValuePair <string, SerializedItemDescriptor> >();
var req = MakeQueryForKind(kind);
await DynamoDBHelpers.IterateQuery(_client, req,
item =>
{
var itemOut = UnmarshalItem(kind, item);
if (itemOut.HasValue)
{
var itemKey = item[DynamoDB.DataStoreSortKey].S;
ret.Add(new KeyValuePair <string, SerializedItemDescriptor>(itemKey, itemOut.Value));
}
});
return(new KeyedItems <SerializedItemDescriptor>(ret));
}
private async Task <HashSet <Tuple <string, string> > > ReadExistingKeys(IEnumerable <DataKind> kinds)
{
var keys = new HashSet <Tuple <string, string> >();
foreach (var kind in kinds)
{
var req = MakeQueryForKind(kind);
req.ProjectionExpression = "#namespace, #key";
req.ExpressionAttributeNames = new Dictionary <string, string>()
{
{ "#namespace", DynamoDB.DataStorePartitionKey },
{ "#key", DynamoDB.DataStoreSortKey }
};
await DynamoDBHelpers.IterateQuery(_client, req,
item => keys.Add(new Tuple <string, string>(
item[DynamoDB.DataStorePartitionKey].S,
item[DynamoDB.DataStoreSortKey].S))
);
}
return(keys);
}