1 package de.juplo.kafka.wordcount.splitter;
3 import lombok.extern.slf4j.Slf4j;
4 import org.apache.kafka.clients.consumer.ConsumerConfig;
5 import org.apache.kafka.streams.StreamsConfig;
6 import org.springframework.boot.SpringApplication;
7 import org.springframework.boot.context.properties.EnableConfigurationProperties;
8 import org.springframework.context.ConfigurableApplicationContext;
9 import org.springframework.context.annotation.Bean;
10 import org.springframework.context.annotation.Configuration;
11 import org.springframework.kafka.support.serializer.JsonDeserializer;
12 import org.springframework.kafka.support.serializer.JsonSerde;
13 import org.springframework.kafka.support.serializer.JsonSerializer;
15 import java.util.Properties;
16 import java.util.concurrent.CompletableFuture;
18 import static org.apache.kafka.streams.errors.StreamsUncaughtExceptionHandler.StreamThreadExceptionResponse.SHUTDOWN_CLIENT;
22 @EnableConfigurationProperties(SplitterApplicationProperties.class)
24 public class SplitterApplicationConfiguration
26 @Bean(initMethod = "start", destroyMethod = "stop")
27 public SplitterStreamProcessor streamProcessor(
28 SplitterApplicationProperties properties,
29 Properties streamProcessorProperties,
30 ConfigurableApplicationContext context)
32 SplitterStreamProcessor streamProcessor = new SplitterStreamProcessor(
33 properties.getInputTopic(),
34 properties.getOutputTopic(),
35 streamProcessorProperties);
37 streamProcessor.streams.setUncaughtExceptionHandler((Throwable e) ->
39 log.error("Unexpected error!", e);
40 CompletableFuture.runAsync(() ->
42 log.info("Stopping application...");
43 SpringApplication.exit(context, () -> 1);
45 return SHUTDOWN_CLIENT;
48 return streamProcessor;
52 public Properties streamProcessorProperties(
53 SplitterApplicationProperties applicationProperties)
55 Properties properties = serializationConfig();
57 properties.put(StreamsConfig.APPLICATION_ID_CONFIG, applicationProperties.getApplicationId());
58 properties.put(StreamsConfig.BOOTSTRAP_SERVERS_CONFIG, applicationProperties.getBootstrapServer());
59 properties.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");
64 static Properties serializationConfig()
66 Properties properties = new Properties();
68 properties.put(StreamsConfig.DEFAULT_KEY_SERDE_CLASS_CONFIG, JsonSerde.class.getName());
69 properties.put(StreamsConfig.DEFAULT_VALUE_SERDE_CLASS_CONFIG, JsonSerde.class.getName());
70 properties.put(JsonDeserializer.KEY_DEFAULT_TYPE, User.class.getName());
71 properties.put(JsonDeserializer.VALUE_DEFAULT_TYPE, Recording.class.getName());
72 properties.put(JsonSerializer.ADD_TYPE_INFO_HEADERS, false);