NEU

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

diff --git a/src/main/java/de/juplo/kafka/chat/backend/persistence/kafka/ChatRoomChannel.java b/src/main/java/de/juplo/kafka/chat/backend/persistence/kafka/ChatRoomChannel.java
index da04554..ac44f99 100644 (file)
--- a/src/main/java/de/juplo/kafka/chat/backend/persistence/kafka/ChatRoomChannel.java
+++ b/src/main/java/de/juplo/kafka/chat/backend/persistence/kafka/ChatRoomChannel.java
@@ -23,54 +23,28 @@ import java.util.UUID;
 public class ChatRoomChannel implements Runnable
 {
   private final String topic;
-  private final Consumer<String, ChatRoomTo> consumer;
-  private final Producer<String, ChatRoomTo> producer;
-  private final ChatRoomFactory chatRoomFactory;
+  private final Consumer<Integer, ChatRoomTo> consumer;
+  private final Producer<Integer, ChatRoomTo> producer;
+  private final ShardingStrategy shardingStrategy;
+  private final ChatMessageChannel chatMessageChannel;
+  private final Clock clock;
+  private final int bufferSize;
 
   private boolean running;
 
 
-  @Override
-  public void run()
-  {
-    consumer.assign(List.of(new TopicPartition(topic, 0)));
-
-    running = true;
-
-    while (running)
-    {
-      try
-      {
-        ConsumerRecords<String, ChatRoomTo> records = consumer.poll(Duration.ofMinutes(5));
-        log.info("Fetched {} messages", records.count());
-
-        for (ConsumerRecord<String, ChatRoomTo> record : records)
-        {
-          UUID id = record.value().getId();
-          String name = record.value().getName();
-          chatRoomFactory.createChatRoom(id, name);
-        }
-      }
-      catch (WakeupException e)
-      {
-      }
-      catch (RecordDeserializationException e)
-      {
-      }
-    }
-  }
-
   Mono<ChatRoomInfo> sendCreateChatRoomRequest(
       UUID chatRoomId,
       String name)
   {
-    ChatRoomTo chatRoomTo = ChatRoomTo.of(chatRoomId, name);
+    int shard = this.shardingStrategy.selectShard(chatRoomId);
+    ChatRoomTo chatRoomTo = ChatRoomTo.of(chatRoomId, name, shard);
     return Mono.create(sink ->
     {
-      ProducerRecord<String, ChatRoomTo> record =
+      ProducerRecord<Integer, ChatRoomTo> record =
           new ProducerRecord<>(
               topic,
-              chatRoomId.toString(),
+              shard,
               chatRoomTo);
 
       producer.send(record, ((metadata, exception) ->
@@ -93,4 +67,42 @@ public class ChatRoomChannel implements Runnable
       }));
     });
   }
+
+  @Override
+  public void run()
+  {
+    consumer.assign(List.of(new TopicPartition(topic, 0)));
+
+    running = true;
+
+    while (running)
+    {
+      try
+      {
+        ConsumerRecords<Integer, ChatRoomTo> records = consumer.poll(Duration.ofMinutes(5));
+        log.info("Fetched {} messages", records.count());
+
+        for (ConsumerRecord<Integer, ChatRoomTo> record : records)
+        {
+          createChatRoom(record.value().toChatRoomInfo());
+        }
+      }
+      catch (WakeupException e)
+      {
+        log.info("Received WakeupException, exiting!");
+        running = false;
+      }
+    }
+  }
+
+  void createChatRoom(ChatRoomInfo chatRoomInfo)
+  {
+    UUID id = chatRoomInfo.getId();
+    String name = chatRoomInfo.getName();
+    int shard = chatRoomInfo.getShard();
+    log.info("Creating ChatRoom {} with buffer-size {}", id, bufferSize);
+    KafkaChatRoomService service = new KafkaChatRoomService(chatMessageChannel, id);
+    ChatRoom chatRoom = new ChatRoom(id, name, shard, clock, service, bufferSize);
+    chatMessageChannel.putChatRoom(chatRoom);
+  }
 }