From dd88fb5302e60c12e77afe5242559de40dc08207 Mon Sep 17 00:00:00 2001
From: Kai Moritz <kai@juplo.de>
Date: Thu, 9 May 2024 09:37:47 +0200
Subject: [PATCH] WIP

---
 .../wordcount/top10/Top10StreamProcessor.java | 35 +++++--------------
 1 file changed, 8 insertions(+), 27 deletions(-)

diff --git a/src/main/java/de/juplo/kafka/wordcount/top10/Top10StreamProcessor.java b/src/main/java/de/juplo/kafka/wordcount/top10/Top10StreamProcessor.java
index f0a7d19..63357e8 100644
--- a/src/main/java/de/juplo/kafka/wordcount/top10/Top10StreamProcessor.java
+++ b/src/main/java/de/juplo/kafka/wordcount/top10/Top10StreamProcessor.java
@@ -1,6 +1,5 @@
 package de.juplo.kafka.wordcount.top10;
 
-import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import lombok.extern.slf4j.Slf4j;
 import org.apache.kafka.streams.KafkaStreams;
@@ -25,37 +24,19 @@ public class Top10StreamProcessor
 		StreamsBuilder builder = new StreamsBuilder();
 
 		builder
-				.<String, String>stream(inputTopic)
-				.map((keyJson, countStr) ->
+				.<Word, WordCount>stream(inputTopic)
+				.map((word, wordCount) ->
 				{
-					try
-					{
-						Key key = mapper.readValue(keyJson, Key.class);
-						Long count = Long.parseLong(countStr);
-						Entry entry = Entry.of(key.getWord(), count);
-						String entryJson = mapper.writeValueAsString(entry);
-						return new KeyValue<>(key.getUsername(), entryJson);
-					}
-					catch (JsonProcessingException e)
-					{
-						throw new RuntimeException(e);
-					}
+					Entry entry = Entry.of(word.getWord(), wordCount.getCount());
+					return new KeyValue<>(word.getUser(), entry);
 				})
 				.groupByKey()
 				.aggregate(
-						() -> "{\"entries\"	: []}",
-						(username, entryJson, rankingJson) ->
+						() -> new Ranking(),
+						(user, entry, ranking) ->
 						{
-							try
-							{
-								Ranking ranking = mapper.readValue(rankingJson, Ranking.class);
-								ranking.add(mapper.readValue(entryJson, Entry.class));
-								return mapper.writeValueAsString(ranking);
-							}
-							catch (JsonProcessingException e)
-							{
-								throw new RuntimeException(e);
-							}
+							ranking.add(entry);
+							return ranking;
 						}
 				)
 				.toStream()
-- 
2.20.1