public IEnumerable <AttachmentInformation> GetAttachmentsAfter(Guid etag, int take, long maxTotalSize)
{
Api.JetSetCurrentIndex(session, Files, "by_etag");
Api.MakeKey(session, Files, etag.TransformToValueForEsentSorting(), MakeKeyGrbit.NewKey);
if (Api.TrySeek(session, Files, SeekGrbit.SeekGT) == false)
{
return(Enumerable.Empty <AttachmentInformation>());
}
var optimizer = new OptimizedIndexReader(Session, Files, take);
do
{
optimizer.Add();
} while (Api.TryMoveNext(session, Files) && optimizer.Count < take);
long totalSize = 0;
return(optimizer
.Where(_ => totalSize <= maxTotalSize)
.Select(o => ReadCurrentAttachmentInformation())
.Select(x =>
{
totalSize += x.Size;
return x;
}));
}
public IEnumerable <RavenJObject> GetMappedResults(params GetMappedResultsParams[] getMappedResultsParams)
{
var optimizedIndexReader = new OptimizedIndexReader <GetMappedResultsParams>(Session, MappedResults, getMappedResultsParams.Length);
Api.JetSetCurrentIndex(session, MappedResults, "by_reduce_key_and_view_hashed");
foreach (var item in getMappedResultsParams)
{
Api.MakeKey(session, MappedResults, item.ViewAndReduceKeyHashed, MakeKeyGrbit.NewKey);
if (Api.TrySeek(session, MappedResults, SeekGrbit.SeekEQ) == false)
{
continue;
}
Api.MakeKey(session, MappedResults, item.ViewAndReduceKeyHashed, MakeKeyGrbit.NewKey);
Api.JetSetIndexRange(session, MappedResults, SetIndexRangeGrbit.RangeUpperLimit | SetIndexRangeGrbit.RangeInclusive);
do
{
optimizedIndexReader.Add(item);
} while (Api.TryMoveNext(session, MappedResults));
}
return(optimizedIndexReader
.Where(item =>
{
// we need to check that we don't have hash collisions
var currentReduceKey = Api.RetrieveColumnAsString(session, MappedResults,
tableColumnsCache.MappedResultsColumns["reduce_key"]);
if (currentReduceKey != item.ReduceKey)
{
return false;
}
var currentView = Api.RetrieveColumnAsString(session, MappedResults, tableColumnsCache.MappedResultsColumns["view"]);
return currentView == item.View;
})
.Select(item =>
{
using (var stream = new BufferedStream(new ColumnStream(session, MappedResults, tableColumnsCache.MappedResultsColumns["data"])))
{
return stream.ToJObject();
}
}));
}