private void PollFromHttp(string streamType, string url, string token, long fromVersion)
{
using (var httpClient = this.CreateHttpClient(token))
{
var dynamicUrl = $"{url}/{fromVersion}/{this.pollerName}";
try
{
var result = httpClient.GetAsync(dynamicUrl).Result;
if (!result.IsSuccessStatusCode)
{
throw new InvalidOperationException(string.Format("The status code was: {0}", result.StatusCode.ToString()));
}
var response = result.Content.ReadAsAsync <PollResponse>().Result;
this.PublishPollResponse(response);
}
catch (Exception ex)
{
this.log.Error(ex, $"Error while polling {streamType} located on {dynamicUrl}");
this.log.Trace($"An error has been detected while polling {streamType} located on {dynamicUrl} but a retry will be performed every 10 seconds");
// To have a break;
Thread.Sleep(10000);
this.bus.Publish(new PollResponseWasReceived(PollResponse.CreateErrorResponse(streamType)));
}
}
}
private static PollResponse CreateBaseResponse(bool errorDetected, bool newEventsWereFound, string streamType, long consumerVersion, long producerVersion)
{
var response = new PollResponse();
response.NewEventsWereFound = newEventsWereFound;
response.StreamType = streamType;
response.ErrorDetected = errorDetected;
// Metrics
response.ConsumerVersion = consumerVersion;
response.ProducerVersion = producerVersion;
return(response);
}
public bool TryUpdateConsumer(string consumerName, PollResponse response, out ServerStatus status)
{
status = null;
if (!this.ocassionallyConnectedSourcesByConsumer.ContainsKey(consumerName))
return false;
var sources = this.ocassionallyConnectedSourcesByConsumer[consumerName];
if (!sources.ContainsKey(response.StreamType))
return false;
var consumer = sources[response.StreamType];
lock (consumer)
{
status = consumer.UpdateConsumer(response);
}
return true;
}
private static PollResponse CreateBaseResponse(bool errorDetected, bool newEventsWereFound, string streamType, long consumerVersion, long producerVersion)
{
var response = new PollResponse();
response.NewEventsWereFound = newEventsWereFound;
response.StreamType = streamType;
response.ErrorDetected = errorDetected;
// Metrics
response.ConsumerVersion = consumerVersion;
response.ProducerVersion = producerVersion;
return response;
}
public PollResponseWasReceived(PollResponse response)
{
this.Response = response;
}
private void PublishPollResponse(PollResponse response)
{
this.bus.Publish(new PollResponseWasReceived(response));
}
private void PublishPollResponse(PollResponse response)
{
this.bus.Publish(new PollResponseWasReceived(response));
}
public ServerStatus UpdateConsumer(PollResponse producerResponse)
{
if (this.consumerEventCollectionVersion == producerResponse.ConsumerVersion) // only updates if versions are equal. Nasty errors.
{
var ecvBefore = this.consumerEventCollectionVersion;
this.producerResponse.Add(producerResponse);
var stopwatch = Stopwatch.StartNew();
while (this.consumerEventCollectionVersion == ecvBefore && this.pusherTimeout > stopwatch.Elapsed)
Thread.Sleep(1);
}
return new ServerStatus(this.consumerEventCollectionVersion);
}
