X-Git-Url: https://juplo.de/gitweb/?a=blobdiff_plain;f=src%2Fmain%2Fjava%2Fde%2Fjuplo%2Fkafka%2Fwordcount%2Fcounter%2FCounterStreamProcessor.java;fp=src%2Fmain%2Fjava%2Fde%2Fjuplo%2Fkafka%2Fwordcount%2Fcounter%2FCounterStreamProcessor.java;h=64bd619d0d30d5e021e5d3be3cc59769737a3831;hb=98f4de98c6c3f527496d85b5e32fef0a3a23cbd5;hp=fd5c5a74061e474133d9cbd42c92a7e1016dafe6;hpb=19226e74f738681af8f4d6a574cf9e69eae1da90;p=demos%2Fkafka%2Fwordcount

diff --git a/src/main/java/de/juplo/kafka/wordcount/counter/CounterStreamProcessor.java b/src/main/java/de/juplo/kafka/wordcount/counter/CounterStreamProcessor.java
index fd5c5a7..64bd619 100644
--- a/src/main/java/de/juplo/kafka/wordcount/counter/CounterStreamProcessor.java
+++ b/src/main/java/de/juplo/kafka/wordcount/counter/CounterStreamProcessor.java
@@ -7,6 +7,7 @@ import org.apache.kafka.streams.kstream.Materialized;
 import org.apache.kafka.streams.state.KeyValueBytesStoreSupplier;
 import org.apache.kafka.streams.state.QueryableStoreTypes;
 import org.apache.kafka.streams.state.ReadOnlyKeyValueStore;
+import org.springframework.kafka.support.serializer.JsonSerde;
 
 import java.util.Properties;
 
@@ -46,7 +47,10 @@ public class CounterStreamProcessor
 		source
 				.map((key, word) -> new KeyValue<>(word, word))
 				.groupByKey()
-				.count(Materialized.as(storeSupplier))
+				.count(
+						Materialized
+								.<Word, Long>as(storeSupplier)
+								.withKeySerde(new JsonSerde<>().copyWithType(Word.class).forKeys()))
 				.toStream()
 				.map((word, counter) -> new KeyValue<>(word, WordCounter.of(word, counter)))
 				.to(outputTopic);