package de.juplo.kafka.wordcount.query;
-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.HostInfo;
+import org.apache.kafka.streams.state.KeyValueBytesStoreSupplier;
+import org.apache.kafka.streams.state.Stores;
import org.springframework.boot.SpringApplication;
-import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.web.ServerProperties;
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.io.IOException;
import java.net.InetSocketAddress;
import java.net.Socket;
+import java.util.Properties;
+import java.util.concurrent.CompletableFuture;
+import static de.juplo.kafka.wordcount.query.QueryStreamProcessor.RANKING_STORE_NAME;
+import static de.juplo.kafka.wordcount.query.QueryStreamProcessor.USER_STORE_NAME;
+import static org.apache.kafka.streams.errors.StreamsUncaughtExceptionHandler.StreamThreadExceptionResponse.SHUTDOWN_CLIENT;
-@SpringBootApplication
+
+@Configuration
@EnableConfigurationProperties(QueryApplicationProperties.class)
-public class QueryApplication
+@Slf4j
+public class QueryApplicationConfiguration
{
@Bean
- public QueryStreamProcessor usersStreamProcessor(
+ public HostInfo applicationServer(
ServerProperties serverProperties,
- QueryApplicationProperties properties,
- ObjectMapper mapper,
- ConfigurableApplicationContext context) throws IOException
+ QueryApplicationProperties applicationProperties) throws IOException
{
String host;
if (serverProperties.getAddress() == null)
{
- HostInfo bootstrapServer = HostInfo.buildFromEndpoint(properties.getBootstrapServer());
+ HostInfo bootstrapServer = HostInfo.buildFromEndpoint(applicationProperties.getBootstrapServer());
Socket socket = new Socket();
socket.connect(new InetSocketAddress(bootstrapServer.host(), bootstrapServer.port()));
host = socket.getLocalAddress().getHostAddress();
Integer port = serverProperties.getPort() == null ? 8080 : serverProperties.getPort();
- return new QueryStreamProcessor(
- properties.getApplicationId(),
- new HostInfo(host, port),
- properties.getBootstrapServer(),
- properties.getUsersInputTopic(),
- properties.getRankingInputTopic(),
- mapper,
- context);
+ return new HostInfo(host, port);
+ }
+
+ @Bean
+ public Properties streamProcessorProperties(
+ QueryApplicationProperties applicationProperties,
+ HostInfo applicationServer)
+ {
+ Properties props = new Properties();
+
+ props.putAll(serializationConfig());
+
+ String applicationId = applicationProperties.getApplicationId();
+ String bootstrapServer = applicationProperties.getBootstrapServer();
+
+ props.put(StreamsConfig.APPLICATION_ID_CONFIG, applicationId);
+ props.put(StreamsConfig.APPLICATION_SERVER_CONFIG, applicationServer.host() + ":" + applicationServer.port());
+ props.put(StreamsConfig.BOOTSTRAP_SERVERS_CONFIG, bootstrapServer);
+
+ props.put(StreamsConfig.BOOTSTRAP_SERVERS_CONFIG, applicationProperties.getBootstrapServer());
+ if (applicationProperties.getCommitInterval() != null)
+ props.put(StreamsConfig.COMMIT_INTERVAL_MS_CONFIG, applicationProperties.getCommitInterval());
+ if (applicationProperties.getCacheMaxBytes() != null)
+ props.put(StreamsConfig.STATESTORE_CACHE_MAX_BYTES_CONFIG, applicationProperties.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, Serdes.String().getClass().getName());
+ props.put(StreamsConfig.DEFAULT_VALUE_SERDE_CLASS_CONFIG, JsonSerde.class.getName());
+ props.put(
+ JsonDeserializer.TYPE_MAPPINGS,
+ "user:" + Key.class.getName() + "," +
+ "ranking:" + Ranking.class.getName() + "," +
+ "userranking:" + UserRanking.class.getName());
+
+ return props;
}
+ @Bean(initMethod = "start", destroyMethod = "stop")
+ public QueryStreamProcessor streamProcessor(
+ Properties streamProcessorProperties,
+ HostInfo applicationServer,
+ QueryApplicationProperties applicationProperties,
+ KeyValueBytesStoreSupplier userStoreSupplier,
+ KeyValueBytesStoreSupplier rankingStoreSupplier,
+ ConfigurableApplicationContext context)
+ {
+ QueryStreamProcessor streamProcessor = new QueryStreamProcessor(
+ streamProcessorProperties,
+ applicationServer,
+ applicationProperties.getUsersInputTopic(),
+ applicationProperties.getRankingInputTopic(),
+ userStoreSupplier,
+ rankingStoreSupplier);
- public static void main(String[] args)
+ 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 userStoreSupplier()
+ {
+ return Stores.persistentKeyValueStore(USER_STORE_NAME);
+ }
+
+ @Bean
+ public KeyValueBytesStoreSupplier rankingStoreSupplier()
{
- SpringApplication.run(QueryApplication.class, args);
+ return Stores.persistentKeyValueStore(RANKING_STORE_NAME);
}
}
projects / demos / kafka / wordcount / blobdiff