public async Task StartAsync(CancellationToken cancellationToken)
{
_consumer.Start(cancellationToken);
await _consumer.Subscription.ForEachAsync(message =>
{
Console.WriteLine($"[{message.Topic}:({message.Partition.Value}, {message.Offset.Value})]: {message.Message.Value}");
_consumer.Commit(message.Partition, message.Offset);
},
cancellationToken);
}
public KafkaBackedDb(RocksStore rocksStore, KafkaConsumer <TValue> kafkaConsumer)
{
_rocksStore = rocksStore;
kafkaConsumer.Start();
kafkaConsumer.Subscription
.ObserveOn(TaskPoolScheduler.Default)
.SubscribeOn(TaskPoolScheduler.Default)
.Subscribe(m =>
{
var value = m.Value;
var currentValue = _rocksStore.Get <string, TValue>(m.Key);
if (!(currentValue is null))
{
value.UpdateObject(currentValue);
}
_rocksStore.Add(m.Key, value);
kafkaConsumer.Commit(m.Partition, m.Offset);
});
}