public async Task ProcessEventsAsync(PartitionContext context, IEnumerable<EventData> messages)
{
var client = await InitTopic();
foreach (EventData eventData in messages)
{
await Task.Delay(_rand.Next(100, 2000)); // spice of life
var json = Encoding.UTF8.GetString(eventData.GetBytes());
Trace.TraceInformation(string.Format("Message received. Partition: '{0}', Data: '{1}'", context.Lease.PartitionId, json));
var request = JsonConvert.DeserializeObject<PurchaseRequest>(json);
var result = new PurchaseResult
{
Timestamp = DateTimeOffset.UtcNow,
Request = request,
Id = Guid.NewGuid()
};
try
{
await _repos.AddPurchasedTicketsAsync(request);
result.Success = true;
}
catch(Exception ex)
{
result.Success = false;
result.ExceptionJson = JsonConvert.SerializeObject(ex);
result.FailureReason = PurchaseFailureReason.ArtistInRehab;
}
var topicMsg = new BrokeredMessage();
topicMsg.Properties["json"] = JsonConvert.SerializeObject(result);
topicMsg.CorrelationId = (string) eventData.Properties["correlationId"];
await client.SendAsync(topicMsg);
}
if (_checkpointStopWatch.Elapsed > TimeSpan.FromMinutes(5))
{
await context.CheckpointAsync();
lock (this)
{
_checkpointStopWatch.Reset();
}
}
}
public static void SendResult(PurchaseResult result, string connectionId)
{
var hubContext = GlobalHost.ConnectionManager.GetHubContext<MainHub>();
if(result.Success)
{
hubContext.Clients.Client(connectionId).orderSucceeded(new { id = result.Request.Id });
}
else
{
hubContext.Clients.Client(connectionId).orderFailed(new { id = result.Request.Id });
}
var summary = new
{
id = result.Id,
requested = result.Request.Timestamp.ToString("u"),
processed = result.Timestamp.ToString("u"),
success = result.Success.ToString(),
ticketcount = result.Request.DesiredTickets.Length
};
hubContext.Clients.All.requestProcessed(summary);
}