X-Git-Url: https://juplo.de/gitweb/?a=blobdiff_plain;f=src%2Fmain%2Fjava%2Fde%2Fjuplo%2Fkafka%2Fwordcount%2Fcounter%2FCounterApplicationConfiguriation.java;fp=src%2Fmain%2Fjava%2Fde%2Fjuplo%2Fkafka%2Fwordcount%2Fcounter%2FCounterApplicationConfiguriation.java;h=f1da4078b24ac301072d8182975541cfed1fc21b;hb=e1ec32bcc70e5f990ca2ddb5566f98cee7e4c2c2;hp=0000000000000000000000000000000000000000;hpb=b8f6728e1957d3cfdd34efebd430e33797b67b58;p=demos%2Fkafka%2Fwordcount

diff --git a/src/main/java/de/juplo/kafka/wordcount/counter/CounterApplicationConfiguriation.java b/src/main/java/de/juplo/kafka/wordcount/counter/CounterApplicationConfiguriation.java
new file mode 100644
index 0000000..f1da407
--- /dev/null
+++ b/src/main/java/de/juplo/kafka/wordcount/counter/CounterApplicationConfiguriation.java
@@ -0,0 +1,81 @@
+package de.juplo.kafka.wordcount.counter;
+
+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 java.util.Properties;
+import java.util.concurrent.CompletableFuture;
+
+import static org.apache.kafka.streams.errors.StreamsUncaughtExceptionHandler.StreamThreadExceptionResponse.SHUTDOWN_CLIENT;
+
+
+@Configuration
+@EnableConfigurationProperties(CounterApplicationProperties.class)
+@Slf4j
+public class CounterApplicationConfiguriation
+{
+	@Bean
+	public Properties propertyMap(CounterApplicationProperties properties)
+	{
+		Properties propertyMap = new Properties();
+
+		propertyMap.put(StreamsConfig.APPLICATION_ID_CONFIG, properties.getApplicationId());
+		propertyMap.put(StreamsConfig.BOOTSTRAP_SERVERS_CONFIG, properties.getBootstrapServer());
+		propertyMap.put(StreamsConfig.DEFAULT_KEY_SERDE_CLASS_CONFIG, Serdes.StringSerde.class.getName());
+		propertyMap.put(StreamsConfig.DEFAULT_VALUE_SERDE_CLASS_CONFIG, Serdes.StringSerde.class.getName());
+		propertyMap.put(StreamsConfig.STATE_DIR_CONFIG, "target");
+		if (properties.getCommitInterval() != null)
+			propertyMap.put(StreamsConfig.COMMIT_INTERVAL_MS_CONFIG, properties.getCommitInterval());
+		if (properties.getCacheMaxBytes() != null)
+			propertyMap.put(StreamsConfig.CACHE_MAX_BYTES_BUFFERING_CONFIG, properties.getCacheMaxBytes());
+		propertyMap.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");
+
+		return propertyMap;
+	}
+
+	@Bean(initMethod = "start", destroyMethod = "stop")
+	public CounterStreamProcessor streamProcessor(
+			CounterApplicationProperties properties,
+			Properties propertyMap,
+			KeyValueBytesStoreSupplier storeSupplier,
+			ObjectMapper objectMapper,
+			ConfigurableApplicationContext context)
+	{
+		CounterStreamProcessor streamProcessor = new CounterStreamProcessor(
+				properties.getInputTopic(),
+				properties.getOutputTopic(),
+				propertyMap,
+				storeSupplier,
+				objectMapper);
+
+		streamProcessor.streams.setUncaughtExceptionHandler((Throwable e) ->
+		{
+			log.error("Unexpected error!", e);
+			CompletableFuture.runAsync(() ->
+			{
+				log.info("Stopping application...");
+				SpringApplication.exit(context, () -> 1);
+			});
+			return SHUTDOWN_CLIENT;
+		});
+
+
+		return streamProcessor;
+	}
+
+	@Bean
+	public KeyValueBytesStoreSupplier storeSupplier()
+	{
+		return Stores.persistentKeyValueStore("counter");
+	}
+}