예제 #1
0
        /// <remarks>
        /// Logs exceptions, hence failing to handle a task fault at the calling side
        /// will not cause an unhandled exception at finalization
        /// </remarks>
        Task <int> GetWorkerInstanceCount(CancellationToken cancellationToken)
        {
            var task = _provisioning.GetCurrentLokadCloudWorkerCount(_currentDeployment, cancellationToken);

            // TODO (ruegg, 2011-05-30): Replace with system events
            task.ContinueWith(t =>
            {
                try
                {
                    if (t.IsFaulted)
                    {
                        if (ProvisioningErrorHandling.IsTransientError(t.Exception))
                        {
                            _log.TryDebug("Provisioning: Getting the current worker instance count failed with a transient error.", task.Exception.GetBaseException());
                        }
                        else
                        {
                            _log.TryWarn("Provisioning: Getting the current worker instance count failed with a permanent error.", task.Exception.GetBaseException());
                        }
                    }
                }
                catch (Exception)
                {
                    // We don't really care, it's only logging that failed
                }
            }, TaskContinuationOptions.ExecuteSynchronously);

            return(task);
        }
예제 #2
0
        /// <remarks>
        /// Logs exceptions, hence failing to handle a task fault at the calling side
        /// will not cause an unhandled exception at finalization
        /// </remarks>
        Task SetWorkerInstanceCount(int count, CancellationToken cancellationToken)
        {
            if (count <= 0 && count > 500)
            {
                throw new ArgumentOutOfRangeException("count");
            }

            var task = _provisioning.UpdateCurrentLokadCloudWorkerCount(_currentDeployment, count, cancellationToken);

            // TODO (ruegg, 2011-05-30): Replace with system events
            task.ContinueWith(t =>
            {
                try
                {
                    if (t.IsFaulted)
                    {
                        HttpStatusCode httpStatus;
                        if (ProvisioningErrorHandling.TryGetHttpStatusCode(t.Exception, out httpStatus))
                        {
                            switch (httpStatus)
                            {
                            case HttpStatusCode.Conflict:
                                _log.TryDebugFormat("Provisioning: Updating the worker instance count to {0} failed because another deployment update is already in progress.", count);
                                break;

                            default:
                                _log.TryDebugFormat("Provisioning: Updating the worker instance count failed with HTTP Status {0} ({1}).", httpStatus, (int)httpStatus);
                                break;
                            }
                        }
                        else if (ProvisioningErrorHandling.IsTransientError(t.Exception))
                        {
                            _log.TryDebug("Provisioning: Updating the worker instance count failed with a transient error.", task.Exception.GetBaseException());
                        }
                        else
                        {
                            _log.TryWarn("Provisioning: Updating the worker instance count failed with a permanent error.", task.Exception.GetBaseException());
                        }
                    }
                }
                catch (Exception)
                {
                    // We don't really care, it's only logging that failed
                }
            }, TaskContinuationOptions.ExecuteSynchronously);

            return(task);
        }