protected virtual void SwitchState(VclHandler handler, VclBackendAction action)
{
if (!ValidTransitionStates.Contains(action))
{
throw new InvalidOperationException($"Invalid attempt to transition back-end from {State} to {action}.");
}
handler.Logger?.LogDebug($"Backend state transition from {State} to {action}");
handler._currentBackendState = VclBackendHandlerStateFactory.Get(action);
}
public async Task <VclBackendAction> ProcessBackendFetchAsync(VclContext context)
{
_backendAttempt = -1;
_currentBackendState = VclBackendHandlerStateFactory.Get(VclBackendAction.Retry);
while (_currentBackendState.State != VclBackendAction.Abandon &&
_currentBackendState.State != VclBackendAction.Deliver)
{
await _currentBackendState.ExecuteAsync(this, context).ConfigureAwait(false);
}
return(_currentBackendState.State);
}
