refactor: Moved exceptions into package `exceptions` - Aligned Code

[demos/kafka/chat] / src / main / java / de / juplo / kafka / chat / backend / persistence / inmemory / SimpleChatHome.java

diff --git a/src/main/java/de/juplo/kafka/chat/backend/persistence/inmemory/SimpleChatHome.java b/src/main/java/de/juplo/kafka/chat/backend/persistence/inmemory/SimpleChatHome.java
index f99bc9d..868c01e 100644 (file)
--- a/src/main/java/de/juplo/kafka/chat/backend/persistence/inmemory/SimpleChatHome.java
+++ b/src/main/java/de/juplo/kafka/chat/backend/persistence/inmemory/SimpleChatHome.java
@@ -1,49 +1,122 @@
 package de.juplo.kafka.chat.backend.persistence.inmemory;
 
-import de.juplo.kafka.chat.backend.domain.ChatHome;
-import de.juplo.kafka.chat.backend.domain.ChatRoom;
-import de.juplo.kafka.chat.backend.domain.UnknownChatroomException;
+import de.juplo.kafka.chat.backend.domain.*;
+import de.juplo.kafka.chat.backend.domain.exceptions.UnknownChatroomException;
+import de.juplo.kafka.chat.backend.persistence.StorageStrategy;
 import lombok.extern.slf4j.Slf4j;
 import reactor.core.publisher.Flux;
 import reactor.core.publisher.Mono;
 
+import java.time.Clock;
 import java.util.*;
 
 
 @Slf4j
 public class SimpleChatHome implements ChatHome
 {
-  private final InMemoryChatHomeService service;
-  private final int shard;
+  private final Integer shard;
+  private final Map<UUID, ChatRoomInfo> chatRoomInfo;
+  private final Map<UUID, ChatRoomData> chatRoomData;
+  private final Clock clock;
+  private final int bufferSize;
 
 
-  public SimpleChatHome(InMemoryChatHomeService service, int shard)
+
+  public SimpleChatHome(
+      StorageStrategy storageStrategy,
+      Clock clock,
+      int bufferSize)
+  {
+    this(
+        null,
+        storageStrategy,
+        clock,
+        bufferSize);
+  }
+
+  public SimpleChatHome(
+      Integer shard,
+      StorageStrategy storageStrategy,
+      Clock clock,
+      int bufferSize)
   {
     log.info("Created SimpleChatHome for shard {}", shard);
-    this.service = service;
+;
     this.shard = shard;
+    this.chatRoomInfo = new HashMap<>();
+    this.chatRoomData = new HashMap<>();
+    storageStrategy
+        .readChatRoomInfo()
+        .filter(info ->
+        {
+          if (shard == null || info.getShard() == shard)
+          {
+            return true;
+          }
+          else
+          {
+            log.info(
+                "SimpleChatHome for shard {} ignores not owned chat-room {}",
+                shard,
+                info);
+            return false;
+          }
+        })
+        .toStream()
+        .forEach(info ->
+        {
+          UUID chatRoomId = info.getId();
+          chatRoomInfo.put(chatRoomId, info);
+          Flux<Message> messageFlux =
+              storageStrategy.readChatRoomData(chatRoomId);
+          chatRoomData.put(
+              info.getId(),
+              new ChatRoomData(
+                  clock,
+                  new InMemoryChatRoomService(messageFlux),
+                  bufferSize));
+        });
+    this.clock = clock;
+    this.bufferSize = bufferSize;
   }
 
-  public SimpleChatHome(InMemoryChatHomeService service)
+
+  @Override
+  public Mono<ChatRoomInfo> createChatRoom(UUID id, String name)
   {
-    this(service, 0);
+    log.info("Creating ChatRoom with buffer-size {}", bufferSize);
+    ChatRoomService service = new InMemoryChatRoomService(Flux.empty());
+    ChatRoomInfo chatRoomInfo = new ChatRoomInfo(id, name, shard);
+    this.chatRoomInfo.put(id, chatRoomInfo);
+    ChatRoomData chatRoomData = new ChatRoomData(clock, service, bufferSize);
+    this.chatRoomData.put(id, chatRoomData);
+    return Mono.just(chatRoomInfo);
   }
 
+  @Override
+  public Mono<ChatRoomInfo> getChatRoomInfo(UUID id)
+  {
+    return Mono
+        .justOrEmpty(chatRoomInfo.get(id))
+        .switchIfEmpty(Mono.error(() -> new UnknownChatroomException(id)));
+  }
 
   @Override
-  public Mono<ChatRoom> getChatRoom(UUID id)
+  public Flux<ChatRoomInfo> getChatRoomInfo()
   {
-    return service
-        .getChatRoom(shard, id)
-        .switchIfEmpty(Mono.error(() -> new UnknownChatroomException(
-            id,
-            shard,
-            service.getOwnedShards())));
+    return Flux.fromIterable(chatRoomInfo.values());
   }
 
   @Override
-  public Flux<ChatRoom> getChatRooms()
+  public Mono<ChatRoomData> getChatRoomData(UUID id)
+  {
+    return Mono
+        .justOrEmpty(chatRoomData.get(id))
+        .switchIfEmpty(Mono.error(() -> new UnknownChatroomException(id)));
+  }
+
+  public Flux<ChatRoomData> getChatRoomData()
   {
-    return service.getChatRooms(shard);
+    return Flux.fromIterable(chatRoomData.values());
   }
 }