public string BeginConversion(ConvertAsync convertAsync, string tenantId)
{
string operationId = this.keyGenerator.Generate();
convertAsync(tenantId, operationId)
.ContinueWith(
t => this.LogBackgroundException(t.Exception, operationId),
TaskContinuationOptions.OnlyOnFaulted);
return(operationId);
}
public string WatchIotHubJobAndBeginConversion(string jobId, ConvertAsync convertAsync, string tenantId)
{
string operationId = this.keyGenerator.Generate();
this.IotHubJobDelayedConversion(
jobId,
convertAsync,
tenantId,
operationId)
.ContinueWith(
t => this.LogBackgroundException(t.Exception, operationId),
TaskContinuationOptions.OnlyOnFaulted);
return(operationId);
}
private async Task IotHubJobDelayedConversion(
string jobId,
ConvertAsync convertAsync,
string tenantId,
string operationId)
{
int getJobErrorCount = 0;
int watchRetryCount = 0;
JobModel job = new JobModel
{
JobId = jobId,
Status = JobStatus.Unknown,
};
do
{
try
{
job = await this.iotHubManagerClient.GetJobAsync(jobId, tenantId);
Console.WriteLine(job);
if (watchRetryCount == 0 &&
job.StartTimeUtc != null &&
(job.StartTimeUtc - DateTime.Now).Value.TotalMilliseconds > (JobWatchRetryCount * JobWatchDelay))
{
// on the first check, see if the start time is within the maximum delay
throw new Exception("Jobs that are not set to start within two minutes of this request are not supported. Conversion will not be triggered");
}
if (job.EndTimeUtc != null && job.EndTimeUtc > DateTime.Now)
{
await convertAsync(tenantId, operationId)
.ContinueWith(
t => this.LogBackgroundException(t.Exception, operationId),
TaskContinuationOptions.OnlyOnFaulted);
return;
}
}
catch (ExternalDependencyException)
{
getJobErrorCount += 1;
}
switch (job.Status)
{
case JobStatus.Completed:
await convertAsync(tenantId, operationId)
.ContinueWith(
t => this.LogBackgroundException(t.Exception, operationId),
TaskContinuationOptions.OnlyOnFaulted);
return;
case JobStatus.Failed:
throw new Exception("The given job failed. Conversion will not be triggered.");
default:
watchRetryCount += 1;
Thread.Sleep(JobWatchDelay);
break;
}
}while (getJobErrorCount < 4 && watchRetryCount < JobWatchRetryCount);
if (getJobErrorCount > 3)
{
throw new Exception("The given job ocould not be found. Conversion will not be triggered.");
}
else
{
throw new Exception($"The job did not complete within the maximum watch time ({(JobWatchRetryCount * JobWatchDelay) / 1000} seconds). Conversion will not be triggered.");
}
}
