X-Git-Url: https://juplo.de/gitweb/?a=blobdiff_plain;f=src%2Fmain%2Fjava%2Fde%2Fjuplo%2Fkafka%2Fwordcount%2Fcounter%2FCounterStreamProcessor.java;fp=src%2Fmain%2Fjava%2Fde%2Fjuplo%2Fkafka%2Fwordcount%2Fcounter%2FCounterStreamProcessor.java;h=0000000000000000000000000000000000000000;hb=4b94d31fbd663cb277276def106be9873ec4a246;hp=e8d7c116ffb8550a257955c825d878f7a6c4cb2b;hpb=02ab54c6b3c099f5b0bd420fc0a37034badf1c71;p=demos%2Fkafka%2Fwordcount

diff --git a/src/main/java/de/juplo/kafka/wordcount/counter/CounterStreamProcessor.java b/src/main/java/de/juplo/kafka/wordcount/counter/CounterStreamProcessor.java
deleted file mode 100644
index e8d7c11..0000000
--- a/src/main/java/de/juplo/kafka/wordcount/counter/CounterStreamProcessor.java
+++ /dev/null
@@ -1,97 +0,0 @@
-package de.juplo.kafka.wordcount.counter;
-
-import com.fasterxml.jackson.core.JsonProcessingException;
-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.KafkaStreams;
-import org.apache.kafka.streams.KeyValue;
-import org.apache.kafka.streams.StreamsBuilder;
-import org.apache.kafka.streams.StreamsConfig;
-import org.apache.kafka.streams.kstream.KStream;
-import org.springframework.boot.SpringApplication;
-import org.springframework.context.ConfigurableApplicationContext;
-import org.springframework.stereotype.Component;
-
-import javax.annotation.PostConstruct;
-import javax.annotation.PreDestroy;
-import java.util.Arrays;
-import java.util.Properties;
-import java.util.concurrent.CompletableFuture;
-import java.util.regex.Pattern;
-
-import static org.apache.kafka.streams.errors.StreamsUncaughtExceptionHandler.StreamThreadExceptionResponse.SHUTDOWN_CLIENT;
-
-
-@Slf4j
-@Component
-public class CounterStreamProcessor
-{
-	final static Pattern PATTERN = Pattern.compile("\\W+");
-
-	public final KafkaStreams streams;
-
-
-	public CounterStreamProcessor(
-			CounterApplicationProperties properties,
-			ObjectMapper mapper,
-			ConfigurableApplicationContext context)
-	{
-		StreamsBuilder builder = new StreamsBuilder();
-
-		KStream<String, String> source = builder.stream(properties.getInputTopic());
-		source
-				.flatMapValues(sentence -> Arrays.asList(PATTERN.split(sentence)))
-				.map((username, word) ->
-				{
-					try
-					{
-						String key = mapper.writeValueAsString(Key.of(username, word));
-						return new KeyValue<>(key, word);
-					}
-					catch (JsonProcessingException e)
-					{
-						throw new RuntimeException(e);
-					}
-				})
-				.groupByKey()
-				.count()
-				.mapValues(value->Long.toString(value))
-				.toStream()
-				.to(properties.getOutputTopic());
-
-		Properties props = new Properties();
-		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());
-		props.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");
-
-		streams = new KafkaStreams(builder.build(), props);
-		streams.setUncaughtExceptionHandler((Throwable e) ->
-		{
-			log.error("Unexpected error!", e);
-			CompletableFuture.runAsync(() ->
-			{
-				log.info("Stopping application...");
-				SpringApplication.exit(context, () -> 1);
-			});
-			return SHUTDOWN_CLIENT;
-		});
-	}
-
-	@PostConstruct
-	public void start()
-	{
-		log.info("Starting Stream-Processor");
-		streams.start();
-	}
-
-	@PreDestroy
-	public void stop()
-	{
-		log.info("Stopping Stream-Processor");
-		streams.close();
-	}
-}