private async IAsyncEnumerable <ResolvedEvent> ReadInternal(
ReadReq request,
UserCredentials userCredentials,
[EnumeratorCancellation] CancellationToken cancellationToken)
{
if (request.Options.CountOptionCase == ReadReq.Types.Options.CountOptionOneofCase.Count &&
request.Options.Count <= 0)
{
throw new ArgumentOutOfRangeException("count");
}
if (request.Options.Filter == null)
{
request.Options.NoFilter = new ReadReq.Types.Empty();
}
request.Options.UuidOption = new ReadReq.Types.Options.Types.UUIDOption
{
Structured = new ReadReq.Types.Empty()
};
using var call = _client.Read(
request, RequestMetadata.Create(userCredentials),
cancellationToken: cancellationToken);
await foreach (var e in call.ResponseStream
.ReadAllAsync(cancellationToken)
.Select(ConvertToResolvedEvent)
.WithCancellation(cancellationToken)
.ConfigureAwait(false))
{
yield return(e);
}
ResolvedEvent ConvertToResolvedEvent(ReadResp response) =>
new ResolvedEvent(
ConvertToEventRecord(response.Event.Event),
ConvertToEventRecord(response.Event.Link),
response.Event.PositionCase switch {
ReadResp.Types.ReadEvent.PositionOneofCase.CommitPosition => new Position(
response.Event.CommitPosition, 0).ToInt64().commitPosition,
ReadResp.Types.ReadEvent.PositionOneofCase.NoPosition => null,
_ => throw new InvalidOperationException()
});
public override async Task Read(
ReadReq request,
IServerStreamWriter <ReadResp> responseStream,
ServerCallContext context)
{
var options = request.Options;
var countOptionsCase = options.CountOptionCase;
var streamOptionsCase = options.StreamOptionCase;
var readDirection = options.ReadDirection;
var filterOptionsCase = options.FilterOptionCase;
var uuidOptionsCase = options.UuidOption.ContentCase;
var user = context.GetHttpContext().User;
var requiresLeader = GetRequiresLeader(context.RequestHeaders);
var op = streamOptionsCase switch {
StreamOptionOneofCase.Stream => ReadOperation.WithParameter(
Plugins.Authorization.Operations.Streams.Parameters.StreamId(request.Options.Stream.StreamIdentifier)),
StreamOptionOneofCase.All => ReadOperation.WithParameter(
Plugins.Authorization.Operations.Streams.Parameters.StreamId(SystemStreams.AllStream)),
_ => throw new InvalidOperationException()
};
if (!await _provider.CheckAccessAsync(user, op, context.CancellationToken).ConfigureAwait(false))
{
throw AccessDenied();
}
await using var enumerator =
(streamOptionsCase, countOptionsCase, readDirection, filterOptionsCase) switch {
(StreamOptionOneofCase.Stream,
CountOptionOneofCase.Count,
ReadDirection.Forwards,
FilterOptionOneofCase.NoFilter) => (IAsyncEnumerator <ResolvedEvent>)
new Enumerators.ReadStreamForwards(
_publisher,
request.Options.Stream.StreamIdentifier,
request.Options.Stream.ToStreamRevision(),
request.Options.Count,
request.Options.ResolveLinks,
user,
requiresLeader,
context.Deadline,
StreamNotFound,
context.CancellationToken),
(StreamOptionOneofCase.Stream,
CountOptionOneofCase.Count,
ReadDirection.Backwards,
FilterOptionOneofCase.NoFilter) => new Enumerators.ReadStreamBackwards(
_publisher,
request.Options.Stream.StreamIdentifier,
request.Options.Stream.ToStreamRevision(),
request.Options.Count,
request.Options.ResolveLinks,
user,
requiresLeader,
context.Deadline,
StreamNotFound,
context.CancellationToken),
(StreamOptionOneofCase.All,
CountOptionOneofCase.Count,
ReadDirection.Forwards,
FilterOptionOneofCase.NoFilter) => new Enumerators.ReadAllForwards(
_publisher,
request.Options.All.ToPosition(),
request.Options.Count,
request.Options.ResolveLinks,
user,
requiresLeader,
context.Deadline,
context.CancellationToken),
(StreamOptionOneofCase.All,
CountOptionOneofCase.Count,
ReadDirection.Backwards,
FilterOptionOneofCase.NoFilter) => new Enumerators.ReadAllBackwards(
_publisher,
request.Options.All.ToPosition(),
request.Options.Count,
request.Options.ResolveLinks,
user,
requiresLeader,
context.Deadline,
context.CancellationToken),
(StreamOptionOneofCase.Stream,
CountOptionOneofCase.Subscription,
ReadDirection.Forwards,
FilterOptionOneofCase.NoFilter) => new Enumerators.StreamSubscription <TStreamId>(
_publisher,
request.Options.Stream.StreamIdentifier,
request.Options.Stream.ToSubscriptionStreamRevision(),
request.Options.ResolveLinks,
user,
requiresLeader,
_readIndex,
context.CancellationToken),
(StreamOptionOneofCase.All,
CountOptionOneofCase.Subscription,
ReadDirection.Forwards,
FilterOptionOneofCase.NoFilter) => new Enumerators.AllSubscription(
_publisher,
request.Options.All.ToSubscriptionPosition(),
request.Options.ResolveLinks,
user,
requiresLeader,
_readIndex,
context.CancellationToken),
(StreamOptionOneofCase.All,
CountOptionOneofCase.Subscription,
ReadDirection.Forwards,
FilterOptionOneofCase.Filter) => new Enumerators.AllSubscriptionFiltered(
_publisher,
request.Options.All.ToSubscriptionPosition(),
request.Options.ResolveLinks,
ConvertToEventFilter(true, request.Options.Filter),
user,
requiresLeader,
_readIndex,
request.Options.Filter.WindowCase switch {
ReadReq.Types.Options.Types.FilterOptions.WindowOneofCase.Count => null,
ReadReq.Types.Options.Types.FilterOptions.WindowOneofCase.Max => request.Options.Filter.Max,
_ => throw new InvalidOperationException()
},
public override async Task Read(
ReadReq request,
IServerStreamWriter <ReadResp> responseStream,
ServerCallContext context)
{
var options = request.Options;
var countOptionsCase = options.CountOptionsCase;
var streamOptionsCase = options.StreamOptionsCase;
var readDirection = options.ReadDirection;
var filterOptionsCase = options.FilterOptionsCase;
var user = await GetUser(_authenticationProvider, context.RequestHeaders);
await using var enumerator =
(streamOptionsCase, countOptionsCase, readDirection, filterOptionsCase) switch {
(StreamOptionsOneofCase.Stream,
CountOptionsOneofCase.Count,
ReadDirection.Forwards,
FilterOptionsOneofCase.NoFilter) => (IAsyncEnumerator <ResolvedEvent>)
new Enumerators.ReadStreamForwards(
_queue,
request.Options.Stream.StreamName,
request.Options.Stream.ToStreamRevision(),
request.Options.Count,
request.Options.ResolveLinks,
user,
context.CancellationToken),
(StreamOptionsOneofCase.Stream,
CountOptionsOneofCase.Count,
ReadDirection.Backwards,
FilterOptionsOneofCase.NoFilter) => new Enumerators.ReadStreamBackwards(
_queue,
request.Options.Stream.StreamName,
request.Options.Stream.ToStreamRevision(),
request.Options.Count,
request.Options.ResolveLinks,
user,
context.CancellationToken),
(StreamOptionsOneofCase.All,
CountOptionsOneofCase.Count,
ReadDirection.Forwards,
FilterOptionsOneofCase.NoFilter) => new Enumerators.ReadAllForwards(
_queue,
request.Options.All.ToPosition(),
request.Options.Count,
request.Options.ResolveLinks,
user,
context.CancellationToken),
(StreamOptionsOneofCase.All,
CountOptionsOneofCase.Count,
ReadDirection.Forwards,
FilterOptionsOneofCase.Filter) => new Enumerators.ReadAllForwardsFiltered(
_queue,
request.Options.All.ToPosition(),
request.Options.Count,
request.Options.ResolveLinks,
ConvertToEventFilter(request.Options.Filter),
request.Options.Filter.WindowCase switch {
ReadReq.Types.Options.Types.FilterOptions.WindowOneofCase.Count => default(int?),
ReadReq.Types.Options.Types.FilterOptions.WindowOneofCase.Max => request.Options.Filter.Max,
_ => throw new InvalidOperationException()
},
