package de.juplo.kafka.chat.backend.domain;
+import lombok.EqualsAndHashCode;
import lombok.Getter;
+import lombok.ToString;
import lombok.extern.slf4j.Slf4j;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
@Slf4j
+@EqualsAndHashCode(of = { "id" })
+@ToString(of = { "id", "name" })
public class ChatRoom
{
@Getter
String user,
String text)
{
+ Message.MessageKey key = Message.MessageKey.of(user, id);
return service
- .persistMessage(Message.MessageKey.of(user, id), LocalDateTime.now(clock), text)
- .doOnNext(message ->
- {
- Sinks.EmitResult result = sink.tryEmitNext(message);
- if (result.isFailure())
- {
- log.warn("Emitting of message failed with {} for {}", result.name(), message);
- }
- });
+ .getMessage(key)
+ .flatMap(existing -> text.equals(existing.getMessageText())
+ ? Mono.just(existing)
+ : Mono.error(() -> new MessageMutationException(existing, text)))
+ .switchIfEmpty(
+ Mono
+ .fromSupplier(() ->service.persistMessage(key, LocalDateTime.now(clock), text))
+ .doOnNext(m ->
+ {
+ Sinks.EmitResult result = sink.tryEmitNext(m);
+ if (result.isFailure())
+ {
+ log.warn("Emitting of message failed with {} for {}", result.name(), m);
+ }
+ }));
}