top10: 1.2.1 - The name of the state-store is an internal detail

[demos/kafka/wordcount] / src / main / java / de / juplo / kafka / wordcount / top10 / Top10ApplicationConfiguration.java

diff --git a/src/main/java/de/juplo/kafka/wordcount/top10/Top10ApplicationConfiguration.java b/src/main/java/de/juplo/kafka/wordcount/top10/Top10ApplicationConfiguration.java
index 000db01..bd5298d 100644 (file)
--- a/src/main/java/de/juplo/kafka/wordcount/top10/Top10ApplicationConfiguration.java
+++ b/src/main/java/de/juplo/kafka/wordcount/top10/Top10ApplicationConfiguration.java
@@ -3,6 +3,8 @@ package de.juplo.kafka.wordcount.top10;
 import lombok.extern.slf4j.Slf4j;
 import org.apache.kafka.clients.consumer.ConsumerConfig;
 import org.apache.kafka.streams.StreamsConfig;
+import org.apache.kafka.streams.state.KeyValueBytesStoreSupplier;
+import org.apache.kafka.streams.state.Stores;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.context.ConfigurableApplicationContext;
@@ -10,11 +12,13 @@ import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.kafka.support.serializer.JsonDeserializer;
 import org.springframework.kafka.support.serializer.JsonSerde;
-import org.springframework.kafka.support.serializer.JsonSerializer;
 
+import java.util.HashMap;
+import java.util.Map;
 import java.util.Properties;
 import java.util.concurrent.CompletableFuture;
 
+import static de.juplo.kafka.wordcount.top10.Top10StreamProcessor.STORE_NAME;
 import static org.apache.kafka.streams.errors.StreamsUncaughtExceptionHandler.StreamThreadExceptionResponse.SHUTDOWN_CLIENT;
 
 
@@ -28,8 +32,24 @@ public class Top10ApplicationConfiguration
        {
                Properties props = new Properties();
 
+               props.putAll(serializationConfig());
+
                props.put(StreamsConfig.APPLICATION_ID_CONFIG, properties.getApplicationId());
                props.put(StreamsConfig.BOOTSTRAP_SERVERS_CONFIG, properties.getBootstrapServer());
+               if (properties.getCommitInterval() != null)
+                       props.put(StreamsConfig.COMMIT_INTERVAL_MS_CONFIG, properties.getCommitInterval());
+               if (properties.getCacheMaxBytes() != null)
+                       props.put(StreamsConfig.STATESTORE_CACHE_MAX_BYTES_CONFIG, properties.getCacheMaxBytes());
+
+               props.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");
+
+               return props;
+       }
+
+       static Map<String, Object> serializationConfig()
+       {
+               Map<String, Object> props = new HashMap<>();
+
                props.put(StreamsConfig.DEFAULT_KEY_SERDE_CLASS_CONFIG, JsonSerde.class.getName());
                props.put(StreamsConfig.DEFAULT_VALUE_SERDE_CLASS_CONFIG, JsonSerde.class.getName());
                props.put(JsonDeserializer.TRUSTED_PACKAGES, Top10Application.class.getPackageName());
@@ -41,12 +61,6 @@ public class Top10ApplicationConfiguration
                                "counter:" + Entry.class.getName() + "," +
                                "user:" + User.class.getName() + "," +
                                "ranking:" + Ranking.class.getName());
-               props.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");
-               if (properties.getCommitInterval() != null)
-                       props.put(StreamsConfig.COMMIT_INTERVAL_MS_CONFIG, properties.getCommitInterval());
-               if (properties.getCacheMaxBytes() != null)
-                       props.put(StreamsConfig.STATESTORE_CACHE_MAX_BYTES_CONFIG, properties.getCacheMaxBytes());
-               props.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");
 
                return props;
        }
@@ -55,12 +69,14 @@ public class Top10ApplicationConfiguration
        public Top10StreamProcessor streamProcessor(
                        Top10ApplicationProperties applicationProperties,
                        Properties streamProcessorProperties,
+                       KeyValueBytesStoreSupplier storeSupplier,
                        ConfigurableApplicationContext context)
        {
                Top10StreamProcessor streamProcessor = new Top10StreamProcessor(
                                applicationProperties.getInputTopic(),
                                applicationProperties.getOutputTopic(),
-                               streamProcessorProperties);
+                               streamProcessorProperties,
+                               storeSupplier);
 
                streamProcessor.streams.setUncaughtExceptionHandler((Throwable e) ->
                {
@@ -75,4 +91,10 @@ public class Top10ApplicationConfiguration
 
                return streamProcessor;
        }
+
+       @Bean
+       public KeyValueBytesStoreSupplier storeSupplier()
+       {
+               return Stores.persistentKeyValueStore(STORE_NAME);
+       }
 }