package de.juplo.kafka.wordcount.top10;
-import com.fasterxml.jackson.databind.ObjectMapper;
import lombok.extern.slf4j.Slf4j;
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.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;
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 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;
{
Properties props = new Properties();
+ props.putAll(serializationConfig());
+
props.put(StreamsConfig.APPLICATION_ID_CONFIG, properties.getApplicationId());
props.put(StreamsConfig.BOOTSTRAP_SERVERS_CONFIG, properties.getBootstrapServer());
- props.put(StreamsConfig.DEFAULT_KEY_SERDE_CLASS_CONFIG, Serdes.String().getClass().getName());
- props.put(StreamsConfig.DEFAULT_VALUE_SERDE_CLASS_CONFIG, Serdes.String().getClass().getName());
+
+ 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 Properties serializationConfig()
+ {
+ Properties props = new Properties();
+
+ 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.KEY_DEFAULT_TYPE, User.class.getName());
+ props.put(JsonDeserializer.VALUE_DEFAULT_TYPE, Ranking.class.getName());
+ props.put(
+ JsonDeserializer.TYPE_MAPPINGS,
+ "key:" + Key.class.getName() + "," +
+ "counter:" + Entry.class.getName() + "," +
+ "user:" + User.class.getName() + "," +
+ "ranking:" + Ranking.class.getName());
+
+ return props;
+ }
+
@Bean(initMethod = "start", destroyMethod = "stop")
public Top10StreamProcessor streamProcessor(
Top10ApplicationProperties applicationProperties,
- ObjectMapper objectMapper,
Properties streamProcessorProperties,
+ KeyValueBytesStoreSupplier storeSupplier,
ConfigurableApplicationContext context)
{
Top10StreamProcessor streamProcessor = new Top10StreamProcessor(
applicationProperties.getInputTopic(),
applicationProperties.getOutputTopic(),
- objectMapper,
- streamProcessorProperties);
+ streamProcessorProperties,
+ storeSupplier);
streamProcessor.streams.setUncaughtExceptionHandler((Throwable e) ->
{
return streamProcessor;
}
+
+ @Bean
+ public KeyValueBytesStoreSupplier storeSupplier()
+ {
+ return Stores.persistentKeyValueStore(STORE_NAME);
+ }
}