X-Git-Url: https://juplo.de/gitweb/?a=blobdiff_plain;f=src%2Fmain%2Fjava%2Fde%2Fjuplo%2Fkafka%2Fwordcount%2Fquery%2FQueryStreamProcessor.java;h=3a1665fa9f6245c867e7703efdd957874e3d0343;hb=f929a47a66a2c14a291133aaa624ad9c5696bd53;hp=7dacd4b914e10717d539c69292300024e4b6c201;hpb=0648885ec026d7434561060dc7edb703efea6853;p=demos%2Fkafka%2Fwordcount

diff --git a/src/main/java/de/juplo/kafka/wordcount/query/QueryStreamProcessor.java b/src/main/java/de/juplo/kafka/wordcount/query/QueryStreamProcessor.java
index 7dacd4b..3a1665f 100644
--- a/src/main/java/de/juplo/kafka/wordcount/query/QueryStreamProcessor.java
+++ b/src/main/java/de/juplo/kafka/wordcount/query/QueryStreamProcessor.java
@@ -5,9 +5,7 @@ import jakarta.annotation.PreDestroy;
 import lombok.extern.slf4j.Slf4j;
 import org.apache.kafka.common.serialization.Serdes;
 import org.apache.kafka.streams.*;
-import org.apache.kafka.streams.kstream.KStream;
-import org.apache.kafka.streams.kstream.KTable;
-import org.apache.kafka.streams.kstream.Materialized;
+import org.apache.kafka.streams.kstream.*;
 import org.apache.kafka.streams.state.HostInfo;
 import org.apache.kafka.streams.state.KeyValueBytesStoreSupplier;
 import org.apache.kafka.streams.state.QueryableStoreTypes;
@@ -22,7 +20,8 @@ import java.util.Properties;
 @Slf4j
 public class QueryStreamProcessor
 {
-	public static final String STORE_NAME = "rankings-by-username";
+	public static final String USER_STORE_NAME = "users";
+	public static final String RANKING_STORE_NAME = "rankings";
 
 	public final KafkaStreams streams;
 	public final HostInfo hostInfo;
@@ -34,37 +33,50 @@ public class QueryStreamProcessor
 			HostInfo applicationServer,
 			String usersInputTopic,
 			String rankingInputTopic,
-			KeyValueBytesStoreSupplier storeSupplier)
+			KeyValueBytesStoreSupplier userStoreSupplier,
+			KeyValueBytesStoreSupplier rankingStoreSupplier)
 	{
 		Topology topology = buildTopology(
 				usersInputTopic,
 				rankingInputTopic,
-				storeSupplier);
+				userStoreSupplier,
+				rankingStoreSupplier);
 		streams = new KafkaStreams(topology, props);
 		hostInfo = applicationServer;
-		storeParameters = StoreQueryParameters.fromNameAndType(STORE_NAME, QueryableStoreTypes.keyValueStore());;
+		storeParameters = StoreQueryParameters.fromNameAndType(RANKING_STORE_NAME, QueryableStoreTypes.keyValueStore());;
 	}
 
 	static Topology buildTopology(
 			String usersInputTopic,
 			String rankingInputTopic,
-			KeyValueBytesStoreSupplier storeSupplier)
+			KeyValueBytesStoreSupplier userStoreSupplier,
+			KeyValueBytesStoreSupplier rankingStoreSupplier)
 	{
 		StreamsBuilder builder = new StreamsBuilder();
 
 		KTable<String, User> users = builder
-				.stream(usersInputTopic)
-				.toTable(Materialized.with(null, new JsonSerde().copyWithType(User.class)));
-		KStream<String, Ranking> rankings = builder.stream(rankingInputTopic);
+				.stream(
+						usersInputTopic,
+						Consumed.with(Serdes.String(), new JsonSerde().copyWithType(User.class)))
+				.toTable(
+						Materialized
+								.<String, User>as(userStoreSupplier)
+								.withKeySerde(Serdes.String())
+								.withValueSerde(new JsonSerde().copyWithType(User.class)));
+		KStream<String, Ranking> rankings = builder
+				.<Key, Ranking>stream(rankingInputTopic)
+				.map((key, value) -> new KeyValue<>(key.getUsername(), value));
 
 		rankings
 				.join(users, (ranking, user) -> UserRanking.of(
 						user.getFirstName(),
 						user.getLastName(),
-						ranking.getEntries()))
+						ranking.getEntries()),
+						Joined.keySerde(Serdes.String()))
 				.toTable(
 						Materialized
-								.<String, UserRanking>as(storeSupplier)
+								.<String, UserRanking>as(rankingStoreSupplier)
+								.withKeySerde(Serdes.String())
 								.withValueSerde(new JsonSerde().copyWithType(UserRanking.class)));
 
 		Topology topology = builder.build();
@@ -80,7 +92,7 @@ public class QueryStreamProcessor
 
 	public Optional<URI> getRedirect(String username)
 	{
-		KeyQueryMetadata metadata = streams.queryMetadataForKey(STORE_NAME, username, Serdes.String().serializer());
+		KeyQueryMetadata metadata = streams.queryMetadataForKey(RANKING_STORE_NAME, username, Serdes.String().serializer());
 		HostInfo activeHost = metadata.activeHost();
 		log.debug("Local store for {}: {}, {}:{}", username, metadata.partition(), activeHost.host(), activeHost.port());