juplo.de Git - demos/kafka/wordcount/blob - src/main/java/de/juplo/kafka/wordcount/query/QueryApplicationConfiguration.java

   1 package de.juplo.kafka.wordcount.query;
   2
   3 import lombok.extern.slf4j.Slf4j;
   4 import org.apache.kafka.clients.consumer.ConsumerConfig;
   5 import org.apache.kafka.common.serialization.Serdes;
   6 import org.apache.kafka.streams.StreamsConfig;
   7 import org.apache.kafka.streams.state.HostInfo;
   8 import org.apache.kafka.streams.state.KeyValueBytesStoreSupplier;
   9 import org.apache.kafka.streams.state.Stores;
  10 import org.springframework.boot.SpringApplication;
  11 import org.springframework.boot.autoconfigure.web.ServerProperties;
  12 import org.springframework.boot.context.properties.EnableConfigurationProperties;
  13 import org.springframework.context.ConfigurableApplicationContext;
  14 import org.springframework.context.annotation.Bean;
  15 import org.springframework.context.annotation.Configuration;
  16 import org.springframework.kafka.support.serializer.JsonDeserializer;
  17 import org.springframework.kafka.support.serializer.JsonSerde;
  18
  19 import java.io.IOException;
  20 import java.net.InetSocketAddress;
  21 import java.net.Socket;
  22 import java.util.Properties;
  23 import java.util.concurrent.CompletableFuture;
  24
  25 import static de.juplo.kafka.wordcount.query.QueryStreamProcessor.STORE_NAME;
  26 import static org.apache.kafka.streams.errors.StreamsUncaughtExceptionHandler.StreamThreadExceptionResponse.SHUTDOWN_CLIENT;
  27
  28
  29 @Configuration
  30 @EnableConfigurationProperties(QueryApplicationProperties.class)
  31 @Slf4j
  32 public class QueryApplicationConfiguration
  33 {
  34         @Bean
  35         public HostInfo applicationServer(
  36                         ServerProperties serverProperties,
  37                         QueryApplicationProperties applicationProperties) throws IOException
  38         {
  39                 String host;
  40                 if (serverProperties.getAddress() == null)
  41                 {
  42                         HostInfo bootstrapServer = HostInfo.buildFromEndpoint(applicationProperties.getBootstrapServer());
  43                         Socket socket = new Socket();
  44                         socket.connect(new InetSocketAddress(bootstrapServer.host(), bootstrapServer.port()));
  45                         host = socket.getLocalAddress().getHostAddress();
  46                 }
  47                 else
  48                 {
  49                         host = serverProperties.getAddress().getHostAddress();
  50                 }
  51
  52                 Integer port = serverProperties.getPort() == null ? 8080 : serverProperties.getPort();
  53
  54                 return new HostInfo(host, port);
  55         }
  56
  57         @Bean
  58         public Properties streamProcessorProperties(
  59                         QueryApplicationProperties applicationProperties,
  60                         HostInfo applicationServer)
  61         {
  62                 Properties props = new Properties();
  63
  64                 props.putAll(serializationConfig());
  65
  66                 String applicationId = applicationProperties.getApplicationId();
  67                 String bootstrapServer = applicationProperties.getBootstrapServer();
  68
  69                 props.put(StreamsConfig.APPLICATION_ID_CONFIG, applicationId);
  70                 props.put(StreamsConfig.APPLICATION_SERVER_CONFIG, applicationServer.host() + ":" + applicationServer.port());
  71                 props.put(StreamsConfig.BOOTSTRAP_SERVERS_CONFIG, bootstrapServer);
  72                 props.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");
  73
  74                 return props;
  75         }
  76
  77         static Properties serializationConfig()
  78         {
  79                 Properties props = new Properties();
  80
  81                 props.put(StreamsConfig.DEFAULT_KEY_SERDE_CLASS_CONFIG, Serdes.String().getClass().getName());
  82                 props.put(StreamsConfig.DEFAULT_VALUE_SERDE_CLASS_CONFIG, JsonSerde.class.getName());
  83                 props.put(JsonDeserializer.VALUE_DEFAULT_TYPE, User.class.getName()); // << Does not work without this!
  84                 props.put(
  85                                 JsonDeserializer.TYPE_MAPPINGS,
  86                                 "user:" + Key.class.getName() + "," +
  87                                 "ranking:" + Ranking.class.getName() + "," +
  88                                 "userdata:" + User.class.getName() + "," +
  89                                 "userranking:" + UserRanking.class.getName());
  90
  91                 return props;
  92         }
  93
  94         @Bean(initMethod = "start", destroyMethod = "stop")
  95         public QueryStreamProcessor streamProcessor(
  96                         Properties streamProcessorProperties,
  97                         HostInfo applicationServer,
  98                         QueryApplicationProperties applicationProperties,
  99                         KeyValueBytesStoreSupplier storeSupplier,
 100                         ConfigurableApplicationContext context)
 101         {
 102                 QueryStreamProcessor streamProcessor = new QueryStreamProcessor(
 103                                 streamProcessorProperties,
 104                                 applicationServer,
 105                                 applicationProperties.getUsersInputTopic(),
 106                                 applicationProperties.getRankingInputTopic(),
 107                                 storeSupplier);
 108
 109                 streamProcessor.streams.setUncaughtExceptionHandler((Throwable e) ->
 110                 {
 111                         log.error("Unexpected error!", e);
 112                         CompletableFuture.runAsync(() ->
 113                         {
 114                                 log.info("Stopping application...");
 115                                 SpringApplication.exit(context, () -> 1);
 116                         });
 117                         return SHUTDOWN_CLIENT;
 118                 });
 119
 120                 return streamProcessor;
 121         }
 122
 123         @Bean
 124         public KeyValueBytesStoreSupplier storeSupplier()
 125         {
 126                 return Stores.persistentKeyValueStore(STORE_NAME);
 127         }
 128 }