coutner: 1.2.3 - Simplified topology, using default-serdes for all steps

[demos/kafka/wordcount] / src / main / java / de / juplo / kafka / wordcount / counter / CounterStreamProcessor.java

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 4cc0c68..d64eb68 100644 (file)
--- a/src/main/java/de/juplo/kafka/wordcount/counter/CounterStreamProcessor.java
+++ b/src/main/java/de/juplo/kafka/wordcount/counter/CounterStreamProcessor.java
@@ -8,10 +8,8 @@ import org.apache.kafka.streams.KeyValue;
 import org.apache.kafka.streams.StreamsBuilder;
 import org.apache.kafka.streams.Topology;
 import org.apache.kafka.streams.kstream.KStream;
-import org.apache.kafka.streams.kstream.Materialized;
 import org.apache.kafka.streams.state.KeyValueBytesStoreSupplier;
 import org.apache.kafka.streams.kstream.*;
-import org.springframework.kafka.support.serializer.JsonSerde;
 
 import java.util.Properties;
 
@@ -48,30 +46,15 @@ public class CounterStreamProcessor
 
                KStream<String, Word> source = builder.stream(
                                inputTopic,
-                               Consumed.with(
-                                               Serdes.String(),
-                                               new JsonSerde<>(Word.class)
-                                                               .ignoreTypeHeaders()));
+                               Consumed.with(Serdes.String(), null));
 
                source
                                .map((key, word) -> new KeyValue<>(word, word))
-                               .groupByKey(Grouped.with(
-                                               new JsonSerde<>(Word.class)
-                                                               .forKeys()
-                                                               .noTypeInfo(),
-                                               new JsonSerde<>(Word.class)
-                                                               .noTypeInfo()))
+                               .groupByKey()
                                .count(Materialized.as(storeSupplier))
                                .toStream()
                                .map((word, count) -> new KeyValue<>(word, WordCount.of(word, count)))
-                               .to(
-                                               outputTopic,
-                                               Produced.with(
-                                                               new JsonSerde<>(Word.class)
-                                                                               .forKeys()
-                                                                               .noTypeInfo(),
-                                                               new JsonSerde<>(WordCount.class)
-                                                                               .noTypeInfo()));
+                               .to(outputTopic);
 
                Topology topology = builder.build();
                log.info("\n\n{}", topology.describe());