query: 2.0.1 - (GREEN) Adjusted implementation to corrected expectations

[demos/kafka/wordcount] / src / main / java / de / juplo / kafka / wordcount / query / QueryStreamProcessor.java

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 dcb1234..e075eb7 100644 (file)
--- a/src/main/java/de/juplo/kafka/wordcount/query/QueryStreamProcessor.java
+++ b/src/main/java/de/juplo/kafka/wordcount/query/QueryStreamProcessor.java
@@ -5,10 +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.Consumed;
-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;
@@ -60,22 +57,26 @@ public class QueryStreamProcessor
                KTable<String, User> users = builder
                                .stream(
                                                usersInputTopic,
-                                               Consumed.with(null, new JsonSerde().copyWithType(User.class)))
+                                               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.stream(rankingInputTopic);
+               KStream<String, Ranking> rankings = builder
+                               .<Key, Ranking>stream(rankingInputTopic)
+                               .map((key, value) -> new KeyValue<>(key.getUser(), 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(rankingStoreSupplier)
+                                                               .withKeySerde(Serdes.String())
                                                                .withValueSerde(new JsonSerde().copyWithType(UserRanking.class)));
 
                Topology topology = builder.build();