X-Git-Url: https://juplo.de/gitweb/?a=blobdiff_plain;f=src%2Fmain%2Fjava%2Fde%2Fjuplo%2Fkafka%2Fwordcount%2Ftop10%2FTop10StreamProcessor.java;h=70ead8796c49617037fa39a176aa44390417a272;hb=3b7fae76b8abb62a8cae3a4a32c880b29bce0574;hp=d3846d89beab0cb573ddca8dcc4ffc477afee2fd;hpb=f350c2cafd9f0b290a021443cc7f5818974438e9;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 d3846d8..70ead87 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 +1,11 @@
 package de.juplo.kafka.wordcount.top10;
 
 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 org.apache.kafka.streams.*;
+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 java.util.Properties;
 
@@ -12,24 +13,29 @@ import java.util.Properties;
 @Slf4j
 public class Top10StreamProcessor
 {
+	public static final String STORE_NAME= "top10";
+
 	public final KafkaStreams streams;
 
 
 	public Top10StreamProcessor(
 			String inputTopic,
 			String outputTopic,
-			Properties props)
+			Properties props,
+			KeyValueBytesStoreSupplier storeSupplier)
 	{
 		Topology topology = Top10StreamProcessor.buildTopology(
 				inputTopic,
-				outputTopic);
+				outputTopic,
+				storeSupplier);
 
 		streams = new KafkaStreams(topology, props);
 	}
 
 	static Topology buildTopology(
 			String inputTopic,
-			String outputTopic)
+			String outputTopic,
+			KeyValueBytesStoreSupplier storeSupplier)
 	{
 		StreamsBuilder builder = new StreamsBuilder();
 
@@ -39,7 +45,8 @@ public class Top10StreamProcessor
 				.groupByKey()
 				.aggregate(
 						() -> new Ranking(),
-						(user, entry, ranking) -> ranking.add(entry))
+						(user, entry, ranking) -> ranking.add(entry),
+						Materialized.as(storeSupplier))
 				.toStream()
 				.to(outputTopic);
 
@@ -49,6 +56,11 @@ public class Top10StreamProcessor
 		return topology;
 	}
 
+	ReadOnlyKeyValueStore<User, Ranking> getStore()
+	{
+		return streams.store(StoreQueryParameters.fromNameAndType(STORE_NAME, QueryableStoreTypes.keyValueStore()));
+	}
+
 	public void start()
 	{
 		log.info("Starting Stream-Processor");