public static IEnumerable <T> Scan <T>(
[NotNull] this IHerculesTimelineClient <T> client,
[NotNull] ScanTimelineQuery query,
TimeSpan perRequestTimeout,
CancellationToken cancellationToken = default)
{
var nextCoordinates = TimelineCoordinates.Empty;
while (true)
{
var readQuery = new ReadTimelineQuery(query.Name)
{
From = query.From,
To = query.To,
Limit = query.BatchSize,
ClientShard = query.ClientShard,
ClientShardCount = query.ClientShardCount,
Coordinates = nextCoordinates
};
var readPayload = client.Read(readQuery, perRequestTimeout, cancellationToken).Payload;
foreach (var @event in readPayload.Events)
{
yield return(@event);
}
if (readPayload.Events.Count < query.BatchSize)
{
break;
}
nextCoordinates = readPayload.Next;
}
}
/// <inheritdoc />
public async Task <ReadTimelineResult <T> > ReadAsync(ReadTimelineQuery query, TimeSpan timeout, CancellationToken cancellationToken = default)
{
try
{
var url = new RequestUrlBuilder("timeline/read")
{
{ Constants.QueryParameters.Timeline, query.Name },
{ Constants.QueryParameters.Limit, query.Limit },
{ Constants.QueryParameters.ClientShard, query.ClientShard },
{ Constants.QueryParameters.ClientShardCount, query.ClientShardCount },
{ "from", EpochHelper.ToUnixTimeUtcTicks(query.From.UtcDateTime) },
{ "to", EpochHelper.ToUnixTimeUtcTicks(query.To.UtcDateTime) }
}
.Build();
var body = CreateRequestBody(query.Coordinates ?? TimelineCoordinates.Empty);
var request = Request
.Post(url)
.WithContentTypeHeader(Constants.ContentTypes.OctetStream)
.WithContent(body);
var result = await client
.SendAsync(request, timeout, cancellationToken : cancellationToken)
.ConfigureAwait(false);
try
{
var operationStatus = responseAnalyzer.Analyze(result.Response, out var errorMessage);
if (operationStatus != HerculesStatus.Success)
{
return(new ReadTimelineResult <T>(operationStatus, null, errorMessage));
}
return(new ReadTimelineResult <T>(operationStatus, ParseResponseBody(result.Response)));
}
finally
{
if (result.Response.HasContent)
{
bufferPool.Return(result.Response.Content.Buffer);
}
}
}
catch (Exception error)
{
log.Error(error);
return(new ReadTimelineResult <T>(HerculesStatus.UnknownError, null, error.Message));
}
}
public async Task <ReadTimelineResult> ReadAsync(ReadTimelineQuery query, TimeSpan timeout, CancellationToken cancellationToken = new CancellationToken())
{
var result = await client.ReadAsync(query, timeout, cancellationToken).ConfigureAwait(false);
return(result.FromGenericResult());
}
public static ReadTimelineResult <T> Read <T>(
[NotNull] this IHerculesTimelineClient <T> client,
[NotNull] ReadTimelineQuery query,
TimeSpan timeout,
CancellationToken cancellationToken = default) =>
client.ReadAsync(query, timeout, cancellationToken).GetAwaiter().GetResult();
public async Task <ReadTimelineResult <HerculesEvent> > ReadAsync(ReadTimelineQuery query, TimeSpan timeout, CancellationToken cancellationToken = default)
{
var result = await client.ReadAsync(query, timeout, cancellationToken).ConfigureAwait(false);
return(result.ToGenericResult());
}
