X-Git-Url: https://juplo.de/gitweb/?a=blobdiff_plain;f=src%2Fmain%2Fjava%2Fde%2Fjuplo%2Fkafka%2Fwordcount%2Fcounter%2FCounterStreamProcessor.java;h=8b9c12b2611f6a4dddc9c813e1c3ace403a6a803;hb=c7f134403fb392077f24567d916a211949c7b197;hp=3dd8c0f85305210a74563083383b3f616392235c;hpb=3ff17b238afc765fe944a20ef67a2f6288fd5df2;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 3dd8c0f..8b9c12b 100644
--- a/src/main/java/de/juplo/kafka/wordcount/counter/CounterStreamProcessor.java
+++ b/src/main/java/de/juplo/kafka/wordcount/counter/CounterStreamProcessor.java
@@ -1,15 +1,13 @@
 package de.juplo.kafka.wordcount.counter;
 
 import lombok.extern.slf4j.Slf4j;
-import org.apache.kafka.common.serialization.Serdes;
-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 org.apache.kafka.streams.*;
 import org.apache.kafka.streams.kstream.Consumed;
-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.state.QueryableStoreTypes;
+import org.apache.kafka.streams.state.ReadOnlyKeyValueStore;
+import org.springframework.kafka.support.serializer.JsonSerde;
 
 import java.util.Properties;
 
@@ -17,6 +15,9 @@ import java.util.Properties;
 @Slf4j
 public class CounterStreamProcessor
 {
+	public static final String STORE_NAME = "counter";
+
+
 	public final KafkaStreams streams;
 
 
@@ -41,16 +42,20 @@ public class CounterStreamProcessor
 	{
 		StreamsBuilder builder = new StreamsBuilder();
 
-		KStream<String, Word> source = builder.stream(
-				inputTopic,
-				Consumed.with(Serdes.String(), null));
-
-		source
+		builder
+				.stream(
+						inputTopic,
+						Consumed.with(
+								new JsonSerde<>(User.class),
+								new JsonSerde<>(Word.class)))
 				.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, count) -> new KeyValue<>(word, WordCount.of(word, count)))
+				.map((word, counter) -> new KeyValue<>(word, WordCounter.of(word, counter)))
 				.to(outputTopic);
 
 		Topology topology = builder.build();
@@ -59,6 +64,11 @@ public class CounterStreamProcessor
 		return topology;
 	}
 
+	ReadOnlyKeyValueStore<Word, Long> getStore()
+	{
+		return streams.store(StoreQueryParameters.fromNameAndType(STORE_NAME, QueryableStoreTypes.keyValueStore()));
+	}
+
 	public void start()
 	{
 		log.info("Starting Stream-Processor");