public async Task <HttpResponseMessage> Plugin(
string token,
List <HttpEventCollectorEventInfo> events,
HttpEventCollectorSender.HttpEventCollectorHandler next
)
{
HttpResponseMessage response = null;
HttpStatusCode statusCode = HttpStatusCode.OK;
Exception webException = null;
string serverReply = null;
int retryDelay = 1000;
for (int retriesCount = 0; retriesCount <= retriesOnError; retriesCount++)
{
try
{
response = await next(token, events);
statusCode = response.StatusCode;
if (statusCode == HttpStatusCode.OK)
{
webException = null;
break;
}
if (Array.IndexOf(HttpEventCollectorApplicationErrors, statusCode) >= 0)
{
if (response.Content != null)
{
serverReply = await response.Content.ReadAsStringAsync();
}
break;
}
}
catch (Exception e)
{
webException = e;
}
await Task.Delay(retryDelay);
retryDelay = Math.Min(RetryDelayCeiling, retryDelay * 2);
}
if (statusCode != HttpStatusCode.OK || webException != null)
{
throw new HttpEventCollectorException(
code: statusCode,
webException: webException,
reply: serverReply,
response: response
);
}
return(response);
}
/// <summary>
/// Callback that should be used as middleware in HttpEventCollectorSender
/// </summary>
/// <param name="request"></param>
/// <param name="next"></param>
/// <returns></returns>
public async Task <HttpResponseMessage> Plugin(
string token,
byte[] serializedEvents,
HttpEventCollectorSender.HttpEventCollectorHandler next)
{
HttpResponseMessage response = null;
HttpStatusCode statusCode = HttpStatusCode.OK;
Exception webException = null;
string serverReply = null;
int retryDelay = 1000; // start with 1 second
// retry sending data until success
for (int retriesCount = 0; retriesCount <= retriesOnError; retriesCount++)
{
try
{
response = await next(token, serializedEvents);
statusCode = response.StatusCode;
if (statusCode == HttpStatusCode.OK)
{
// the data has been sent successfully
webException = null;
break;
}
else if (Array.IndexOf(HttpEventCollectorApplicationErrors, statusCode) >= 0)
{
// HTTP event collector application error detected - resend wouldn't help
// in this case. Record server reply and break.
if (response.Content != null)
{
serverReply = await response.Content.ReadAsStringAsync();
}
break;
}
else
{
// retry
}
}
catch (Exception e)
{
// connectivity problem - record exception and retry
webException = e;
}
// wait before next retry
await Task.Delay(retryDelay);
// increase delay exponentially
retryDelay = Math.Min(RetryDelayCeiling, retryDelay * 2);
}
if (statusCode != HttpStatusCode.OK || webException != null)
{
throw new HttpEventCollectorException(
code: statusCode == HttpStatusCode.OK ? HttpStatusCode.InternalServerError : statusCode,
webException: webException,
reply: serverReply,
response: response,
serializedEvents: System.Text.Encoding.UTF8.GetString(serializedEvents)
);
}
return(response);
}
