/// <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);
}
/// <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);
}