public static DatastoreResults <T> WithEntries(DatastoreQuery <T> q, DatastoreEntry <T>[] res)
{
var b = new ResultBuilder(q);
Task.Factory.StartNew(() =>
{
foreach (var r in res.Select(e => new DatastoreResult <T>(e)))
{
b.Output.Add(r, b.Cancellation.Token);
}
}).ContinueWith(_ => b.Output.CompleteAdding());
return(b.Results());
}
public ResultBuilder(DatastoreQuery <T> q)
{
var bufSize = 1;
if (q.KeysOnly)
{
bufSize = DatastoreQuery <T> .KeysOnlyBufferSize;
}
DatastoreQuery = q;
Output = new BlockingCollection <DatastoreResult <T> >(bufSize);
Cancellation = new CancellationTokenSource();
Cancellation.Token.Register(() => Output.CompleteAdding());
}
public static DatastoreResults <T> WithCollection(DatastoreQuery <T> q, BlockingCollection <DatastoreResult <T> > res)
{
var b = new ResultBuilder(q);
Task.Factory.StartNew(() =>
{
DatastoreResult <T> item;
while (res.TryTake(out item, Timeout.Infinite, b.Cancellation.Token))
{
b.Output.Add(item, b.Cancellation.Token);
}
}).ContinueWith(_ => b.Output.CompleteAdding());
return(b.Results());
}
internal DatastoreResults(DatastoreQuery <T> datastoreQuery, CancellationTokenSource cancellation, BlockingCollection <DatastoreResult <T> > res)
{
DatastoreQuery = datastoreQuery;
Cancellation = cancellation;
_res = res;
}
public static DatastoreResults <T> ReplaceQuery(DatastoreResults <T> r, DatastoreQuery <T> q) => new DatastoreResults <T>(q, r.Cancellation, r.Next());