X-Git-Url: https://juplo.de/gitweb/?a=blobdiff_plain;f=src%2Fmain%2Fjava%2Fde%2Fjuplo%2Fkafka%2Fchat%2Fbackend%2Fpersistence%2Fkafka%2FChatRoomChannel.java;h=9ea23b13126afa753fc4290e54e7aa6ef7fc40aa;hb=5c338c58065988f7841c4ab9ee1b193e754da9b9;hp=b08a50d2a6c78a3309e3bb347005af065ec9ff7e;hpb=716ffa6a7665496e614ce6a1671c8e49c562a4c2;p=demos%2Fkafka%2Fchat

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 b08a50d2..9ea23b13 100644
--- 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
@@ -9,67 +9,31 @@ import org.apache.kafka.clients.consumer.ConsumerRecords;
 import org.apache.kafka.clients.producer.Producer;
 import org.apache.kafka.clients.producer.ProducerRecord;
 import org.apache.kafka.common.TopicPartition;
-import org.apache.kafka.common.errors.RecordDeserializationException;
 import org.apache.kafka.common.errors.WakeupException;
 import reactor.core.publisher.Mono;
 
 import java.time.*;
 import java.util.List;
+import java.util.Optional;
 import java.util.UUID;
+import java.util.concurrent.Callable;
 
 
 @RequiredArgsConstructor
 @Slf4j
-public class ChatRoomChannel implements Runnable
+public class ChatRoomChannel implements Callable<Optional<Exception>>
 {
   private final String topic;
-  private final Consumer<Integer, ChatRoomTo> consumer;
   private final Producer<Integer, ChatRoomTo> producer;
+  private final Consumer<Integer, ChatRoomTo> consumer;
   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<Integer, ChatRoomTo> records = consumer.poll(Duration.ofMinutes(5));
-        log.info("Fetched {} messages", records.count());
-
-        for (ConsumerRecord<Integer, ChatRoomTo> record : records)
-        {
-          UUID id = record.value().getId();
-          String name = record.value().getName();
-          chatRoomFactory.createChatRoom(id, name);
-        }
-      }
-      catch (WakeupException e)
-      {
-      }
-      catch (RecordDeserializationException e)
-      {
-      }
-    }
-  }
-
-  void createChatRoom()
-  {
-    log.info("Creating ChatRoom with buffer-size {}", bufferSize);
-    KafkaChatRoomService service = new KafkaChatRoomService(chatMessageChannel, id);
-    int shard = shardingStrategy.selectShard(id);
-    ChatRoom chatRoom = new ChatRoom(id, name, shard, clock, service, bufferSize);
-    chatMessageChannel.putChatRoom(chatRoom);
-  }
-
   Mono<ChatRoomInfo> sendCreateChatRoomRequest(
       UUID chatRoomId,
       String name)
@@ -104,4 +68,51 @@ public class ChatRoomChannel implements Runnable
       }));
     });
   }
+
+  @Override
+  public Optional<Exception> call()
+  {
+    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;
+      }
+      catch (Exception e)
+      {
+        log.error("Exiting abnormally!");
+        return Optional.of(e);
+      }
+    }
+
+    log.info("Exiting normally");
+    return Optional.empty();
+  }
+
+
+  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);
+  }
 }