X-Git-Url: https://juplo.de/gitweb/?a=blobdiff_plain;f=src%2Fmain%2Fjava%2Fde%2Fjuplo%2Fkafka%2Fchat%2Fbackend%2Fdomain%2FChatroom.java;h=c05fda0abf137df3e6ba5079c15b0cfbec392e29;hb=45c723b0b0c2c6fb39d126ef2cbaf0bd9f365236;hp=e1638aa9e02395bc700a45e7526ab64dca882af9;hpb=bb86037c439adea0f2befde98571eaf966c9a5e0;p=demos%2Fkafka%2Fchat

diff --git a/src/main/java/de/juplo/kafka/chat/backend/domain/Chatroom.java b/src/main/java/de/juplo/kafka/chat/backend/domain/Chatroom.java
index e1638aa9..c05fda0a 100644
--- a/src/main/java/de/juplo/kafka/chat/backend/domain/Chatroom.java
+++ b/src/main/java/de/juplo/kafka/chat/backend/domain/Chatroom.java
@@ -2,7 +2,6 @@ package de.juplo.kafka.chat.backend.domain;
 
 import lombok.Getter;
 import lombok.RequiredArgsConstructor;
-import lombok.Value;
 import lombok.extern.slf4j.Slf4j;
 import reactor.core.publisher.Flux;
 import reactor.core.publisher.Mono;
@@ -20,7 +19,7 @@ public class Chatroom
   private final UUID id;
   @Getter
   private final String name;
-  private final LinkedHashMap<MessageKey, Message> messages = new LinkedHashMap<>();
+  private final PersistenceStrategy persistence;
   private final Sinks.Many<Message> sink = Sinks.many().multicast().onBackpressureBuffer();
 
   synchronized public Mono<Message> addMessage(
@@ -29,41 +28,15 @@ public class Chatroom
       String user,
       String text)
   {
-    return persistMessage(id, timestamp, user, text)
+    return persistence
+        .persistMessage(Message.MessageKey.of(user, id), timestamp, text)
         .doOnNext(message -> sink.tryEmitNext(message).orThrow());
   }
 
-  private Mono<Message> persistMessage(
-      Long id,
-      LocalDateTime timestamp,
-      String user,
-      String text)
-  {
-    Message message = new Message(id, (long)messages.size(), timestamp, user, text);
-
-    MessageKey key = new MessageKey(user, id);
-    Message existing = messages.get(key);
-    if (existing != null)
-    {
-      log.info("Message with key {} already exists; {}", key, existing);
-      if (!message.equals(existing))
-        throw new MessageMutationException(message, existing);
-      return Mono.empty();
-    }
-
-    messages.put(key, message);
-    return Mono
-        .fromSupplier(() -> message)
-        .log();
-  }
 
   public Mono<Message> getMessage(String username, Long messageId)
   {
-    return Mono.fromSupplier(() ->
-    {
-      MessageKey key = MessageKey.of(username, messageId);
-      return messages.get(key);
-    });
+    return persistence.getMessage(Message.MessageKey.of(username, messageId));
   }
 
   public Flux<Message> listen()
@@ -73,21 +46,6 @@ public class Chatroom
 
   public Flux<Message> getMessages(long first, long last)
   {
-    return Flux.fromStream(messages
-        .values()
-        .stream()
-        .filter(message ->
-        {
-          long serial = message.getSerialNumber();
-          return serial >= first && serial <= last;
-        }));
-  }
-
-
-  @Value(staticConstructor = "of")
-  static class MessageKey
-  {
-    String username;
-    Long messageId;
+    return persistence.getMessages(first, last);
   }
 }