package de.juplo.kafka.chat.backend.persistence.kafka;
import de.juplo.kafka.chat.backend.domain.Message;
+import de.juplo.kafka.chat.backend.domain.MessageMutationException;
import lombok.RequiredArgsConstructor;
+import lombok.extern.log4j.Log4j;
+import org.apache.kafka.clients.producer.Producer;
+import org.apache.kafka.clients.producer.ProducerRecord;
import org.apache.kafka.common.TopicPartition;
+import reactor.core.publisher.Mono;
+
+import java.time.LocalDateTime;
+import java.time.ZoneOffset;
+import java.util.UUID;
@RequiredArgsConstructor
+@Log4j
class ChatRoomActiveMessageHandlingStrategy implements MessageHandlingStrategy
{
+ private final Producer<String, MessageTo> producer;
private final TopicPartition tp;
+ private final UUID chatRoomId;
+ private final ZoneOffset zoneOffset;
+ private final KafkaChatRoomService chatRoomService;
+
+
+ @Override
+ public Mono<Message> persistMessage(
+ Message.MessageKey key,
+ LocalDateTime timestamp,
+ String text)
+ {
+ return Mono.create(sink ->
+ {
+ ProducerRecord<String, MessageTo> record =
+ new ProducerRecord<>(
+ tp.topic(),
+ tp.partition(),
+ timestamp.toEpochSecond(zoneOffset),
+ chatRoomId.toString(),
+ MessageTo.of(key.getUsername(), key.getMessageId(), text));
+
+ producer.send(record, ((metadata, exception) ->
+ {
+ if (metadata != null)
+ {
+ // On successful send
+ {
+ // Emit new message
+ message = new Message(key, metadata.offset(), timestamp, text);
+ messages.put(message.getKey(), message);
+ }
+
+ sink.success();
+ }
+ else
+ {
+ // On send-failure
+ sink.error(exception);
+ }
+ }));
+ });
+ }
@Override
public MessageHandlingStrategy handleMessage(Message message)
{
- chatrooms[tp.partition()].put()
- return this;
}
}