1 package de.juplo.kafka.chat.backend.persistence.inmemory;
3 import de.juplo.kafka.chat.backend.domain.Message;
4 import de.juplo.kafka.chat.backend.domain.ChatRoomService;
5 import lombok.extern.slf4j.Slf4j;
6 import reactor.core.publisher.Flux;
7 import reactor.core.publisher.Mono;
9 import java.time.LocalDateTime;
10 import java.util.LinkedHashMap;
14 public class InMemoryChatRoomService implements ChatRoomService
16 private final LinkedHashMap<Message.MessageKey, Message> messages;
19 public InMemoryChatRoomService(LinkedHashMap<Message.MessageKey, Message> messages)
21 this.messages = messages;
24 public InMemoryChatRoomService(Flux<Message> messageFlux)
26 log.debug("Creating InMemoryChatRoomService");
27 messages = new LinkedHashMap<>();
28 messageFlux.subscribe(message -> messages.put(message.getKey(), message));
32 public Message persistMessage(
33 Message.MessageKey key,
34 LocalDateTime timestamp,
37 Message message = new Message(key, (long)messages.size(), timestamp, text);
38 messages.put(message.getKey(), message);
43 public Mono<Message> getMessage(Message.MessageKey key)
45 return Mono.fromSupplier(() -> messages.get(key));
49 public Flux<Message> getMessages(long first, long last)
51 return Flux.fromStream(messages
56 long serial = message.getSerialNumber();
57 return serial >= first && serial <= last;