refactor: Added logging of loaded messages

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

diff --git a/src/main/java/de/juplo/kafka/chat/backend/implementation/kafka/DataChannel.java b/src/main/java/de/juplo/kafka/chat/backend/implementation/kafka/DataChannel.java
index 2fa4998..ec6079b 100644 (file)
--- a/src/main/java/de/juplo/kafka/chat/backend/implementation/kafka/DataChannel.java
+++ b/src/main/java/de/juplo/kafka/chat/backend/implementation/kafka/DataChannel.java
@@ -147,11 +147,16 @@ public class DataChannel implements Runnable, ConsumerRebalanceListener
       infoChannel.sendShardAssignedEvent(partition);
       shardingPublisherStrategy
           .publishOwnership(partition)
-          .doOnNext(instanceId -> log.info(
-              "Instance {} was published as owner of shard {}",
+          .doOnSuccess(instanceId -> log.info(
+              "Successfully published instance {} as owner of shard {}",
               instanceId,
               partition))
-          .subscribe();
+          .doOnError(throwable -> log.error(
+              "Could not publish instance {} as owner of shard {}: {}",
+              instanceId,
+              partition,
+              throwable))
+          .block();
     });
 
     consumer.resume(partitions);
@@ -266,6 +271,11 @@ public class DataChannel implements Runnable, ConsumerRebalanceListener
     KafkaChatMessageService kafkaChatRoomService =
         (KafkaChatMessageService) chatRoomData.getChatRoomService();
 
+    log.debug(
+        "Loaded message from partition={} at offset={}: {}",
+        partition,
+        offset,
+        message);
     kafkaChatRoomService.persistMessage(message);
   }