import org.apache.kafka.clients.producer.Producer;
import org.apache.kafka.clients.producer.ProducerRecord;
import org.apache.kafka.common.TopicPartition;
-import org.apache.kafka.common.errors.RecordDeserializationException;
import org.apache.kafka.common.errors.WakeupException;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
import java.time.*;
-import java.util.Collection;
-import java.util.List;
-import java.util.Map;
-import java.util.UUID;
+import java.util.*;
+import java.util.concurrent.Callable;
import java.util.stream.IntStream;
@Slf4j
-public class ChatMessageChannel implements Runnable, ConsumerRebalanceListener
+public class ChatMessageChannel implements Callable<Optional<Exception>>, ConsumerRebalanceListener
{
private final String topic;
- private final Consumer<String, MessageTo> consumer;
private final Producer<String, MessageTo> producer;
+ private final Consumer<String, MessageTo> consumer;
private final ZoneId zoneId;
private final int numShards;
private final boolean[] isShardOwned;
public ChatMessageChannel(
String topic,
- Consumer<String, MessageTo> consumer,
Producer<String, MessageTo> producer,
+ Consumer<String, MessageTo> consumer,
ZoneId zoneId,
int numShards)
{
}
@Override
- public void run()
+ public Optional<Exception> call()
{
consumer.subscribe(List.of(topic));
log.info("Received WakeupException, exiting!");
running = false;
}
+ catch (Exception e)
+ {
+ log.error("Exiting abnormally!");
+ return Optional.of(e);
+ }
}
+
+ log.info("Exiting normally");
+ return Optional.empty();
}
void loadMessages(ConsumerRecords<String, MessageTo> records)
return Mono.justOrEmpty(chatrooms[shard].get(id));
}
- Flux<ChatRoom> getChatRooms(int shard)
+ Flux<ChatRoom> getChatRooms()
{
- return Flux.fromStream(chatrooms[shard].values().stream());
+ return Flux.fromStream(IntStream
+ .range(0, numShards)
+ .filter(shard -> isShardOwned[shard])
+ .mapToObj(shard -> Integer.valueOf(shard))
+ .flatMap(shard -> chatrooms[shard].values().stream()));
}
}