public async IAsyncEnumerable <DescribedEvent> EnumerateDescribed(EnumerateDirection direction, int limit,
[EnumeratorCancellation] CancellationToken token)
{
await foreach (var entry in Enumerate(direction, limit, token))
{
var item = DescribeEvent(entry);
yield return(item);
}
}
public IAsyncEnumerable <EventCommit> EnumerateCommits(string type, string id, long maxversion,
EnumerateDirection direction = EnumerateDirection.Ascending, int?limit = null,
CancellationToken token = default)
{
FilterDefinition <EventCommit> query = Filters.And(CommitFilters.ByAggregate(type, id),
Filters.Lte(x => x.VersionEvents, maxversion));
return(Enumerate(query, direction, limit, token));
}
private async IAsyncEnumerable <EventCommit> Enumerate(FilterDefinition <EventCommit> query,
EnumerateDirection direction, int?limit,
[EnumeratorCancellation] CancellationToken token)
{
FindOptions options;
if (DeactivateTimeoutOnRead)
{
options = new FindOptions()
{
NoCursorTimeout = true,
MaxTime = TimeSpan.MaxValue,
MaxAwaitTime = TimeSpan.MaxValue,
};
}
else
{
options = new FindOptions();
}
SortDefinition <EventCommit> sort;
if (direction == EnumerateDirection.Ascending)
{
sort = Sorts.Ascending(x => x.Ordinal);
}
else
{
sort = Sorts.Descending(x => x.Ordinal);
}
var find = Collection
.Find(query, options)
.Sort(sort);
if (limit.HasValue && limit > 0)
{
find = find.Limit(limit);
}
IAsyncCursor <EventCommit> cursor = await find
.ToCursorAsync(token);
while (await cursor.MoveNextAsync(token) && !token.IsCancellationRequested)
{
foreach (EventCommit item in cursor.Current)
{
token.ThrowIfCancellationRequested();
yield return(item);
}
}
}
public abstract IAsyncEnumerable <IEvent> Enumerate(EnumerateDirection direction, int limit,
CancellationToken token);
public IAsyncEnumerable <EventCommit> EnumerateAllCommits(
EnumerateDirection direction = EnumerateDirection.Ascending, int?limit = null,
CancellationToken token = default)
{
return(Enumerate(CommitFilters.All, direction, limit, token));
}
public override IAsyncEnumerable <IEvent> Enumerate(EnumerateDirection direction, int limit,
CancellationToken token)
{
throw new NotImplementedException();
}
