query: 1.0.6 - Added `QueryApplicationIT`

[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 15b28db..c4ae4ae 100644 (file)
--- a/src/main/java/de/juplo/kafka/wordcount/query/QueryStreamProcessor.java
+++ b/src/main/java/de/juplo/kafka/wordcount/query/QueryStreamProcessor.java
@@ -6,14 +6,12 @@ import jakarta.annotation.PostConstruct;
 import jakarta.annotation.PreDestroy;
 import lombok.extern.slf4j.Slf4j;
 import org.apache.kafka.common.serialization.Serdes;
-import org.apache.kafka.streams.KafkaStreams;
-import org.apache.kafka.streams.KeyQueryMetadata;
-import org.apache.kafka.streams.StoreQueryParameters;
-import org.apache.kafka.streams.StreamsBuilder;
+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.state.HostInfo;
+import org.apache.kafka.streams.state.KeyValueBytesStoreSupplier;
 import org.apache.kafka.streams.state.QueryableStoreTypes;
 import org.apache.kafka.streams.state.ReadOnlyKeyValueStore;
 
@@ -38,6 +36,24 @@ public class QueryStreamProcessor
                        HostInfo applicationServer,
                        String usersInputTopic,
                        String rankingInputTopic,
+                       KeyValueBytesStoreSupplier storeSupplier,
+                       ObjectMapper mapper)
+       {
+               Topology topology = buildTopology(
+                               usersInputTopic,
+                               rankingInputTopic,
+                               storeSupplier,
+                               mapper);
+               streams = new KafkaStreams(topology, props);
+               hostInfo = applicationServer;
+               storeParameters = StoreQueryParameters.fromNameAndType(STORE_NAME, QueryableStoreTypes.keyValueStore());;
+               this.mapper = mapper;
+       }
+
+       static Topology buildTopology(
+                       String usersInputTopic,
+                       String rankingInputTopic,
+                       KeyValueBytesStoreSupplier storeSupplier,
                        ObjectMapper mapper)
        {
                StreamsBuilder builder = new StreamsBuilder();
@@ -64,12 +80,17 @@ public class QueryStreamProcessor
                                                throw new RuntimeException(e);
                                        }
                                })
-                               .toTable(Materialized.as(STORE_NAME));
+                               .toTable(Materialized.as(storeSupplier));
 
-               streams = new KafkaStreams(builder.build(), props);
-               hostInfo = applicationServer;
-               storeParameters = StoreQueryParameters.fromNameAndType(STORE_NAME, QueryableStoreTypes.keyValueStore());;
-               this.mapper = mapper;
+               Topology topology = builder.build();
+               log.info("\n\n{}", topology.describe());
+
+               return topology;
+       }
+
+       ReadOnlyKeyValueStore<String, String> getStore()
+       {
+               return streams.store(storeParameters);
        }
 
        public Optional<URI> getRedirect(String username)
@@ -92,7 +113,7 @@ public class QueryStreamProcessor
        {
                return
                                Optional
-                                               .ofNullable(streams.store(storeParameters).get(username))
+                                               .ofNullable(getStore().get(username))
                                                .map(json ->
                                                {
                                                        try