public async Task <TaskSeriesCommandResult> ExecuteAsync(CancellationToken cancellationToken)
{
TimeSpan delay;
try
{
_trace.Verbose(string.Format(CultureInfo.InvariantCulture, "Renewing Singleton lock ({0})", _lockId), source: TraceSource.Execution);
AccessCondition condition = new AccessCondition
{
LeaseId = _leaseId
};
await _leaseBlob.RenewLeaseAsync(condition, null, null, cancellationToken);
// The next execution should occur after a normal delay.
delay = _speedupStrategy.GetNextDelay(executionSucceeded: true);
}
catch (StorageException exception)
{
if (exception.IsServerSideError())
{
// The next execution should occur more quickly (try to renew the lease before it expires).
delay = _speedupStrategy.GetNextDelay(executionSucceeded: false);
}
else
{
// If we've lost the lease or cannot restablish it, we want to fail any
// in progress function execution
throw;
}
}
return(new TaskSeriesCommandResult(wait: Task.Delay(delay)));
}
public async Task <TaskSeriesCommandResult> ExecuteAsync(CancellationToken cancellationToken)
{
TimeSpan delay;
try
{
AccessCondition condition = new AccessCondition
{
LeaseId = _leaseId
};
DateTimeOffset requestStart = DateTimeOffset.UtcNow;
await _leaseBlob.RenewLeaseAsync(condition, null, null, cancellationToken);
_lastRenewal = DateTime.UtcNow;
_lastRenewalLatency = _lastRenewal - requestStart;
// The next execution should occur after a normal delay.
delay = _speedupStrategy.GetNextDelay(executionSucceeded: true);
}
catch (StorageException exception)
{
if (exception.IsServerSideError())
{
// The next execution should occur more quickly (try to renew the lease before it expires).
delay = _speedupStrategy.GetNextDelay(executionSucceeded: false);
string msg = string.Format(CultureInfo.InvariantCulture, "Singleton lock renewal failed for blob '{0}' with error code {1}. Retry renewal in {2} milliseconds.",
_lockId, FormatErrorCode(exception), delay.TotalMilliseconds);
_trace.Warning(msg, source: TraceSource.Execution);
_logger?.LogWarning(msg);
}
else
{
// Log the details we've been accumulating to help with debugging this scenario
int leasePeriodMilliseconds = (int)_leasePeriod.TotalMilliseconds;
string lastRenewalFormatted = _lastRenewal.ToString("yyyy-MM-ddTHH:mm:ss.FFFZ", CultureInfo.InvariantCulture);
int millisecondsSinceLastSuccess = (int)(DateTime.UtcNow - _lastRenewal).TotalMilliseconds;
int lastRenewalMilliseconds = (int)_lastRenewalLatency.TotalMilliseconds;
string msg = string.Format(CultureInfo.InvariantCulture, "Singleton lock renewal failed for blob '{0}' with error code {1}. The last successful renewal completed at {2} ({3} milliseconds ago) with a duration of {4} milliseconds. The lease period was {5} milliseconds.",
_lockId, FormatErrorCode(exception), lastRenewalFormatted, millisecondsSinceLastSuccess, lastRenewalMilliseconds, leasePeriodMilliseconds);
_trace.Error(msg);
_logger?.LogError(msg);
// If we've lost the lease or cannot re-establish it, we want to fail any
// in progress function execution
throw;
}
}
return(new TaskSeriesCommandResult(wait: Task.Delay(delay)));
}
