private async Task <string> TryAcquireLeaseAsync(IStorageBlockBlob blob, TimeSpan leasePeriod, CancellationToken cancellationToken)
{
bool blobDoesNotExist = false;
try
{
// Optimistically try to acquire the lease. The blob may not yet
// exist. If it doesn't we handle the 404, create it, and retry below
return(await blob.AcquireLeaseAsync(leasePeriod, null, cancellationToken));
}
catch (StorageException exception)
{
if (exception.RequestInformation != null)
{
if (exception.RequestInformation.HttpStatusCode == 409)
{
return(null);
}
else if (exception.RequestInformation.HttpStatusCode == 404)
{
blobDoesNotExist = true;
}
else
{
throw;
}
}
else
{
throw;
}
}
if (blobDoesNotExist)
{
await TryCreateAsync(blob, cancellationToken);
try
{
return(await blob.AcquireLeaseAsync(leasePeriod, null, cancellationToken));
}
catch (StorageException exception)
{
if (exception.RequestInformation != null &&
exception.RequestInformation.HttpStatusCode == 409)
{
return(null);
}
else
{
throw;
}
}
}
return(null);
}
public async Task <string> TryAcquireLeaseAsync(IStorageBlockBlob blob, CancellationToken cancellationToken)
{
try
{
return(await blob.AcquireLeaseAsync(LeasePeriod, null, cancellationToken));
}
catch (StorageException exception)
{
if (exception.IsConflictLeaseAlreadyPresent())
{
return(null);
}
else if (exception.IsNotFoundBlobOrContainerNotFound())
{
// If someone deleted the receipt, there's no lease to acquire.
return(null);
}
else
{
throw;
}
}
}
private async Task<string> TryAcquireLeaseAsync(IStorageBlockBlob blob, TimeSpan leasePeriod, CancellationToken cancellationToken)
{
try
{
return await blob.AcquireLeaseAsync(leasePeriod, null, cancellationToken);
}
catch (StorageException exception)
{
if (exception.IsConflictLeaseAlreadyPresent())
{
return null;
}
else if (exception.IsNotFoundBlobOrContainerNotFound())
{
// If someone deleted the receipt, there's no lease to acquire.
return null;
}
else
{
throw;
}
}
}
private async Task<string> TryAcquireLeaseAsync(IStorageBlockBlob blob, TimeSpan leasePeriod, CancellationToken cancellationToken)
{
bool blobDoesNotExist = false;
try
{
// Optimistically try to acquire the lease. The blob may not yet
// exist. If it doesn't we handle the 404, create it, and retry below
return await blob.AcquireLeaseAsync(leasePeriod, null, cancellationToken);
}
catch (StorageException exception)
{
if (exception.RequestInformation != null)
{
if (exception.RequestInformation.HttpStatusCode == 409)
{
return null;
}
else if (exception.RequestInformation.HttpStatusCode == 404)
{
blobDoesNotExist = true;
}
else
{
throw;
}
}
else
{
throw;
}
}
if (blobDoesNotExist)
{
await TryCreateAsync(blob, cancellationToken);
try
{
return await blob.AcquireLeaseAsync(leasePeriod, null, cancellationToken);
}
catch (StorageException exception)
{
if (exception.RequestInformation != null &&
exception.RequestInformation.HttpStatusCode == 409)
{
return null;
}
else
{
throw;
}
}
}
return null;
}
