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.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
-import org.springframework.boot.context.properties.EnableConfigurationProperties;
-import org.springframework.context.ConfigurableApplicationContext;
-import org.springframework.context.annotation.Bean;
-
-import java.util.Properties;
-import java.util.concurrent.CompletableFuture;
-
-import static org.apache.kafka.streams.errors.StreamsUncaughtExceptionHandler.StreamThreadExceptionResponse.SHUTDOWN_CLIENT;
@SpringBootApplication
-@EnableConfigurationProperties(CounterApplicationProperties.class)
-@Slf4j
public class CounterApplication
{
- @Bean(initMethod = "start", destroyMethod = "stop")
- public CounterStreamProcessor streamProcessor(
- CounterApplicationProperties properties,
- ObjectMapper objectMapper,
- ConfigurableApplicationContext context)
- {
- 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");
- propertyMap.put(StreamsConfig.COMMIT_INTERVAL_MS_CONFIG, 0);
- propertyMap.put(StreamsConfig.CACHE_MAX_BYTES_BUFFERING_CONFIG, 0);
- propertyMap.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");
-
- CounterStreamProcessor streamProcessor = new CounterStreamProcessor(
- properties.getInputTopic(),
- properties.getOutputTopic(),
- propertyMap,
- 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;
- }
-
public static void main(String[] args)
{
SpringApplication.run(CounterApplication.class, args);