public async Task ReceiveEventsAsync(
string deviceId,
Func <EventData, bool> onEventReceived,
CancellationToken token)
{
EventHubClient client = this.EventHubClient;
int count = (await client.GetRuntimeInformationAsync()).PartitionCount;
string partition = EventHubPartitionKeyResolver.ResolveToPartition(deviceId, count);
PartitionReceiver receiver = client.CreateReceiver("$Default", partition, EventPosition.FromEnd());
var result = new TaskCompletionSource <bool>();
using (token.Register(() => result.TrySetCanceled()))
{
receiver.SetReceiveHandler(
new PartitionReceiveHandler(
data =>
{
bool done = onEventReceived(data);
if (done)
{
result.TrySetResult(true);
}
return(done);
}));
await result.Task;
}
await receiver.CloseAsync();
}
public async Task ReceiveEventsAsync(
string deviceId,
DateTime seekTime,
Func <EventData, bool> onEventReceived,
CancellationToken token)
{
EventHubClient client = this.EventHubClient;
int count = (await client.GetRuntimeInformationAsync()).PartitionCount;
string partition = EventHubPartitionKeyResolver.ResolveToPartition(deviceId, count);
seekTime = seekTime.ToUniversalTime().Subtract(TimeSpan.FromMinutes(2)); // substract 2 minutes to account for client/server drift
EventPosition position = EventPosition.FromEnqueuedTime(seekTime);
PartitionReceiver receiver = client.CreateReceiver("$Default", partition, position);
var result = new TaskCompletionSource <bool>();
using (token.Register(() => result.TrySetCanceled()))
{
receiver.SetReceiveHandler(
new PartitionReceiveHandler(
data =>
{
bool done = onEventReceived(data);
if (done)
{
result.TrySetResult(true);
}
return(done);
}));
await result.Task;
}
await receiver.CloseAsync();
}