query: 1.0.6 - Refined `QueryApplicationConfiguration`

--
the state-store is configurable through a store-suplier

diff --git a/src/main/java/de/juplo/kafka/wordcount/query/QueryApplicationConfiguration.java b/src/main/java/de/juplo/kafka/wordcount/query/QueryApplicationConfiguration.java
index 458d1b6..bfda626 100644 (file)
--- a/src/main/java/de/juplo/kafka/wordcount/query/QueryApplicationConfiguration.java
+++ b/src/main/java/de/juplo/kafka/wordcount/query/QueryApplicationConfiguration.java
@@ -6,6 +6,8 @@ import org.apache.kafka.clients.consumer.ConsumerConfig;
 import org.apache.kafka.common.serialization.Serdes;
 import org.apache.kafka.streams.StreamsConfig;
 import org.apache.kafka.streams.state.HostInfo;
+import org.apache.kafka.streams.state.KeyValueBytesStoreSupplier;
+import org.apache.kafka.streams.state.Stores;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.web.ServerProperties;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
@@ -19,6 +21,7 @@ import java.net.Socket;
 import java.util.Properties;
 import java.util.concurrent.CompletableFuture;
 
+import static de.juplo.kafka.wordcount.query.QueryStreamProcessor.STORE_NAME;
 import static org.apache.kafka.streams.errors.StreamsUncaughtExceptionHandler.StreamThreadExceptionResponse.SHUTDOWN_CLIENT;
 
 
@@ -85,6 +88,7 @@ public class QueryApplicationConfiguration
                        Properties streamProcessorProperties,
                        HostInfo applicationServer,
                        QueryApplicationProperties applicationProperties,
+                       KeyValueBytesStoreSupplier storeSupplier,
                        ObjectMapper mapper,
                        ConfigurableApplicationContext context)
        {
@@ -93,6 +97,7 @@ public class QueryApplicationConfiguration
                                applicationServer,
                                applicationProperties.getUsersInputTopic(),
                                applicationProperties.getRankingInputTopic(),
+                               storeSupplier,
                                mapper);
 
                streamProcessor.streams.setUncaughtExceptionHandler((Throwable e) ->
@@ -108,4 +113,10 @@ public class QueryApplicationConfiguration
 
                return streamProcessor;
        }
+
+       @Bean
+       public KeyValueBytesStoreSupplier storeSupplier()
+       {
+               return Stores.persistentKeyValueStore(STORE_NAME);
+       }
 }

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 58c627e..b7a08f8 100644 (file)
--- a/src/main/java/de/juplo/kafka/wordcount/query/QueryStreamProcessor.java
+++ b/src/main/java/de/juplo/kafka/wordcount/query/QueryStreamProcessor.java
@@ -11,6 +11,7 @@ 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;
 
@@ -35,9 +36,14 @@ public class QueryStreamProcessor
                        HostInfo applicationServer,
                        String usersInputTopic,
                        String rankingInputTopic,
+                       KeyValueBytesStoreSupplier storeSupplier,
                        ObjectMapper mapper)
        {
-               Topology topology = buildTopology(usersInputTopic, rankingInputTopic, mapper);
+               Topology topology = buildTopology(
+                               usersInputTopic,
+                               rankingInputTopic,
+                               storeSupplier,
+                               mapper);
                streams = new KafkaStreams(topology, props);
                hostInfo = applicationServer;
                storeParameters = StoreQueryParameters.fromNameAndType(STORE_NAME, QueryableStoreTypes.keyValueStore());;
@@ -47,6 +53,7 @@ public class QueryStreamProcessor
        static Topology buildTopology(
                        String usersInputTopic,
                        String rankingInputTopic,
+                       KeyValueBytesStoreSupplier storeSupplier,
                        ObjectMapper mapper)
        {
                StreamsBuilder builder = new StreamsBuilder();
@@ -73,7 +80,7 @@ public class QueryStreamProcessor
                                                throw new RuntimeException(e);
                                        }
                                })
-                               .toTable(Materialized.as(STORE_NAME));
+                               .toTable(Materialized.as(storeSupplier));
 
                Topology topology = builder.build();
                log.info("\n\n{}", topology.describe());