X-Git-Url: https://juplo.de/gitweb/?a=blobdiff_plain;f=src%2Fmain%2Fjava%2Fde%2Fjuplo%2Fkafka%2Fwordcount%2Ftop10%2FTop10StreamProcessor.java;h=084e4250582efdbf21127d24cfbe1d334a485bd8;hb=a01b5436757600a44b20260798d7331c7e33a851;hp=b669344abbec415b2328d43e40b390bfb6070722;hpb=1bd7726318005a9ed24a8c14b45311a05fa1a937;p=demos%2Fkafka%2Fwordcount

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 b669344..084e425 100644
--- a/src/main/java/de/juplo/kafka/wordcount/top10/Top10StreamProcessor.java
+++ b/src/main/java/de/juplo/kafka/wordcount/top10/Top10StreamProcessor.java
@@ -1,10 +1,10 @@
 package de.juplo.kafka.wordcount.top10;
 
-import com.fasterxml.jackson.databind.ObjectMapper;
 import lombok.extern.slf4j.Slf4j;
 import org.apache.kafka.streams.KafkaStreams;
 import org.apache.kafka.streams.KeyValue;
 import org.apache.kafka.streams.StreamsBuilder;
+import org.apache.kafka.streams.Topology;
 
 import java.util.Properties;
 
@@ -18,17 +18,27 @@ public class Top10StreamProcessor
 	public Top10StreamProcessor(
 			String inputTopic,
 			String outputTopic,
-			ObjectMapper mapper,
 			Properties props)
+	{
+		Topology topology = Top10StreamProcessor.buildTopology(
+				inputTopic,
+				outputTopic);
+
+		streams = new KafkaStreams(topology, props);
+	}
+
+	static Topology buildTopology(
+			String inputTopic,
+			String outputTopic)
 	{
 		StreamsBuilder builder = new StreamsBuilder();
 
 		builder
-				.<Word, Counter>stream(inputTopic)
-				.map((word, counter) ->
+				.<Key, Counter>stream(inputTopic)
+				.map((key, counter) ->
 				{
-					Entry entry = Entry.of(word.getWord(), counter.getCounter());
-					return new KeyValue<>(word.getUser(), entry);
+					Entry entry = Entry.of(key.getWord(), counter.getCounter());
+					return new KeyValue<>(key.getUser(), entry);
 				})
 				.groupByKey()
 				.aggregate(
@@ -42,7 +52,10 @@ public class Top10StreamProcessor
 				.toStream()
 				.to(outputTopic);
 
-		streams = new KafkaStreams(builder.build(), props);
+		Topology topology = builder.build();
+		log.info("\n\n{}", topology.describe());
+
+		return topology;
 	}
 
 	public void start()