public bool AcquireLock(PessimisticConcurrencyContext lockContext)
{
var request = BlobRequest.Lease(this.GetUri(lockContext.ObjectId), BlobRequestTimeout, LeaseAction.Acquire, null);
this.Account.Credentials.SignRequest(request);
// add extra headers not supported by SDK - not supported by emulator yet (SDK 1.7)
////request.Headers["x-ms-version"] = "2012-02-12";
////request.Headers.Add("x-ms-lease-duration", lockContext.Duration.TotalSeconds.ToString());
try
{
using (var response = request.GetResponse())
{
if (response is HttpWebResponse &&
HttpStatusCode.Created.Equals((response as HttpWebResponse).StatusCode))
{
lockContext.LockId = response.Headers["x-ms-lease-id"];
return(true);
}
else
{
return(false);
}
}
}
catch (WebException e)
{
this._logger.LogWarning("Warning acquiring blob '{0}' lease: {1}", lockContext.ObjectId, e.Message);
if (WebExceptionStatus.ProtocolError.Equals(e.Status))
{
if (e.Response is HttpWebResponse)
{
if (HttpStatusCode.NotFound.Equals((e.Response as HttpWebResponse).StatusCode))
{
lockContext.LockId = null;
return(true);
}
else if (HttpStatusCode.Conflict.Equals((e.Response as HttpWebResponse).StatusCode))
{
lockContext.LockId = null;
return(false);
}
}
throw;
}
return(false);
}
catch (Exception e)
{
this._logger.LogError("Error acquiring blob '{0}' lease: {1}", lockContext.ObjectId, e.Message);
throw;
}
}
public void ReleaseLock(PessimisticConcurrencyContext lockContext)
{
if (string.IsNullOrWhiteSpace(lockContext.LockId))
{
throw new ArgumentNullException("lockContext.LockId", "LockId cannot be null or empty");
}
var request = BlobRequest.Lease(this.GetUri(lockContext.ObjectId), BlobRequestTimeout, LeaseAction.Release, lockContext.LockId);
this.Account.Credentials.SignRequest(request);
using (var response = request.GetResponse())
{
if (response is HttpWebResponse &&
!HttpStatusCode.OK.Equals((response as HttpWebResponse).StatusCode))
{
this._logger.LogError("Error releasing blob '{0}' lease: {1}", lockContext.ObjectId, (response as HttpWebResponse).StatusDescription);
throw new InvalidOperationException((response as HttpWebResponse).StatusDescription);
}
}
}
