public async Task StartMonitoring(Task preTask)
{
_logger?.Info("{0} A ring is set up: {1}", m_host.FullName, DisplayName);
await preTask.ConfigureAwait(false);
_logger?.Info("{0} Ring pretask done. Starting check loop for {1}", m_host.FullName, DisplayName);
while (true)
{
await Task.Delay(m_host.m_dataflowOptions.MonitorInterval).ConfigureAwait(false);
bool empty = false;
if (m_hb.NoHeartbeatDuring(() => { empty = this.IsRingEmpty(); }) && empty)
{
_logger.Debug("{0} 1st level empty ring check passed for {1}", m_host.FullName, this.DisplayName);
bool noHeartbeat = await m_hb.NoHeartbeatDuring(
async() =>
{
//trigger batch
foreach (var batchedFlow in m_ringNodes.OfType <IBatchedDataflow>())
{
batchedFlow.TriggerBatch();
}
await Task.Delay(m_host.m_dataflowOptions.MonitorInterval).ConfigureAwait(false);
empty = this.IsRingEmpty();
}).ConfigureAwait(false);
if (noHeartbeat && empty)
{
_logger.Debug("{0} 2nd level empty ring check passed for {1}", m_host.FullName, this.DisplayName);
m_hb.Complete(); //start the completion domino :)
break;
}
else
{
//batched flow dumped some hidden elements to the flow, go back to the loop
_logger.Debug("{0} New elements entered the ring by batched flows ({1}). Will fall back to 1st level empty ring check.", m_host.FullName, this.DisplayName);
}
}
}
_logger.Info("{0} Ring completion detected! Completion triggered on heartbeat node: {1}", m_host.FullName, DisplayName);
}
