feat: Added counting of restored instances

[demos/kafka/chat] / src / main / java / de / juplo / kafka / chat / backend / implementation / inmemory / InMemoryChatMessageService.java

diff --git a/src/main/java/de/juplo/kafka/chat/backend/implementation/inmemory/InMemoryChatMessageService.java b/src/main/java/de/juplo/kafka/chat/backend/implementation/inmemory/InMemoryChatMessageService.java
index 0345c00..5d5feb8 100644 (file)
--- a/src/main/java/de/juplo/kafka/chat/backend/implementation/inmemory/InMemoryChatMessageService.java
+++ b/src/main/java/de/juplo/kafka/chat/backend/implementation/inmemory/InMemoryChatMessageService.java
@@ -2,30 +2,41 @@ package de.juplo.kafka.chat.backend.implementation.inmemory;
 
 import de.juplo.kafka.chat.backend.domain.ChatMessageService;
 import de.juplo.kafka.chat.backend.domain.Message;
+import de.juplo.kafka.chat.backend.implementation.StorageStrategy;
 import lombok.extern.slf4j.Slf4j;
 import reactor.core.publisher.Flux;
 import reactor.core.publisher.Mono;
 
 import java.time.LocalDateTime;
 import java.util.LinkedHashMap;
+import java.util.UUID;
 
 
 @Slf4j
 public class InMemoryChatMessageService implements ChatMessageService
 {
+  private final UUID chatRoomId;
   private final LinkedHashMap<Message.MessageKey, Message> messages;
 
 
-  public InMemoryChatMessageService(Flux<Message> messageFlux)
+  public InMemoryChatMessageService(UUID chatRoomId)
   {
     log.debug("Creating InMemoryChatMessageService");
+    this.chatRoomId = chatRoomId;
     messages = new LinkedHashMap<>();
-    messageFlux
+  }
+
+
+  Mono<Void> restore(StorageStrategy storageStrategy)
+  {
+    Flux<Message> messageFlux = storageStrategy.readChatRoomData(chatRoomId);
+
+    return messageFlux
         .doOnNext(message -> messages.put(message.getKey(), message))
-        .then()
-        .doOnSuccess(empty -> log.info("Restored InMemoryChatMessageService"))
+        .count()
+        .doOnSuccess(count -> log.info("Restored InMemoryChatMessageService with {} messages", count))
         .doOnError(throwable -> log.error("Could not restore InMemoryChatMessageService"))
-        .block();
+        .then();
   }
 
   @Override