/// <summary>
///
/// </summary>
/// <param name="retryPolicy"></param>
/// <param name="fromSequenceNumber"></param>
/// <param name="messageCount"></param>
/// <param name="sessionId"></param>
/// <param name="receiveLinkName"></param>
/// <param name="cancellationToken"></param>
/// <returns></returns>
public override async Task <IEnumerable <ServiceBusMessage> > PeekAsync(
ServiceBusRetryPolicy retryPolicy,
long?fromSequenceNumber,
int messageCount = 1,
string sessionId = null,
string receiveLinkName = null,
CancellationToken cancellationToken = default)
{
RetriableContext context = new RetriableContext(
ConnectionScope,
new Stopwatch(),
retryPolicy,
EntityName,
cancellationToken);
return(await context.RunOperation(
async() => await PeekInternal(
context,
fromSequenceNumber,
messageCount,
sessionId,
receiveLinkName)
.ConfigureAwait(false))
.ConfigureAwait(false));
}
/// <summary>
///
/// </summary>
/// <param name="fromSequenceNumber"></param>
/// <param name="maxMessages"></param>
/// <param name="cancellationToken"></param>
/// <returns></returns>
internal async IAsyncEnumerable <ServiceBusMessage> PeekRangeBySequenceInternal(
long?fromSequenceNumber,
int maxMessages = 1,
[EnumeratorCancellation]
CancellationToken cancellationToken = default)
{
RetriableContext context = CreateRetriableContext(cancellationToken);
ReceivingAmqpLink openedLink =
await context.RunOperation(
async() => await Consumer.ReceiveLink.GetOrCreateAsync(context.TimeSpan)
.ConfigureAwait(false))
.ConfigureAwait(false);
var source = (Source)openedLink.Settings.Source;
if (source.FilterSet.TryGetValue <string>(AmqpClientConstants.SessionFilterName, out var tempSessionId))
{
// If one of the constructors not accepting a SessionId was used, the broker will determine which session to send messages from.
SessionId = tempSessionId;
}
IAsyncEnumerable <ServiceBusMessage> ret = PeekRangeBySequenceInternal(
fromSequenceNumber: fromSequenceNumber,
maxMessages: maxMessages,
sessionId: SessionId,
cancellationToken: cancellationToken);
await foreach (ServiceBusMessage msg in ret.ConfigureAwait(false))
{
yield return(msg);
}
}