public async Task RunAsync(CancellationToken cancellationToken)
{
while (!cancellationToken.IsCancellationRequested)
{
try
{
var newShardingSettings = settings.ShardingSettingsProvider();
if (shardingSettings == null || !shardingSettings.Equals(newShardingSettings))
{
shardingSettings = newShardingSettings;
restart = true;
}
if (restart)
{
await Restart().ConfigureAwait(false);
restart = false;
}
using (new OperationContextToken($"Iteration-{iteration++}"))
using (tracer.BeginConsumerCustomOperationSpan("Iteration"))
using (iterationMetric?.For("time").Measure())
{
await MakeIteration().ConfigureAwait(false);
}
}
catch (Exception error)
{
if (cancellationToken.IsCancellationRequested)
{
return;
}
log.Error(error, "Failed to consume batch.");
await DelayOnError().ConfigureAwait(false);
}
}
if (coordinates != null)
{
await settings.CoordinatesStorage.AdvanceAsync(coordinates).ConfigureAwait(false);
}
log.Info("Final coordinates: {StreamCoordinates}.", coordinates);
settings.OnStop?.Invoke(coordinates);
}
public async Task RunAsync(CancellationToken cancellationToken)
{
while (!cancellationToken.IsCancellationRequested)
{
try
{
// (iloktionov): Catch-up with state for other shards on any change to our sharding settings:
var newShardingSettings = settings.ShardingSettingsProvider();
if (shardingSettings == null || !shardingSettings.Equals(newShardingSettings))
{
log.Info(
"Observed new sharding settings: shard with index {ShardIndex} from {ShardCount}. Syncing coordinates.",
newShardingSettings.ClientShardIndex,
newShardingSettings.ClientShardCount);
shardingSettings = newShardingSettings;
restart = true;
}
if (restart)
{
await Restart(cancellationToken).ConfigureAwait(false);
restart = false;
}
using (iterationMetric?.For("time").Measure())
{
await MakeIteration(cancellationToken).ConfigureAwait(false);
}
}
catch (Exception error)
{
if (cancellationToken.IsCancellationRequested)
{
return;
}
log.Error(error, "Failed to consume stream.");
await Task.Delay(settings.DelayOnError, cancellationToken).SilentlyContinue().ConfigureAwait(false);
}
}
}
