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.RANKING_STORE_NAME;
  26 import static de.juplo.kafka.wordcount.query.QueryStreamProcessor.USER_STORE_NAME;
  27 import static org.apache.kafka.streams.errors.StreamsUncaughtExceptionHandler.StreamThreadExceptionResponse.SHUTDOWN_CLIENT;
  28
  29
  30 @Configuration
  31 @EnableConfigurationProperties(QueryApplicationProperties.class)
  32 @Slf4j
  33 public class QueryApplicationConfiguration
  34 {
  35         @Bean
  36         public HostInfo applicationServer(
  37                         ServerProperties serverProperties,
  38                         QueryApplicationProperties applicationProperties) throws IOException
  39         {
  40                 String host;
  41                 if (serverProperties.getAddress() == null)
  42                 {
  43                         HostInfo bootstrapServer = HostInfo.buildFromEndpoint(applicationProperties.getBootstrapServer());
  44                         Socket socket = new Socket();
  45                         socket.connect(new InetSocketAddress(bootstrapServer.host(), bootstrapServer.port()));
  46                         host = socket.getLocalAddress().getHostAddress();
  47                 }
  48                 else
  49                 {
  50                         host = serverProperties.getAddress().getHostAddress();
  51                 }
  52
  53                 Integer port = serverProperties.getPort() == null ? 8080 : serverProperties.getPort();
  54
  55                 return new HostInfo(host, port);
  56         }
  57
  58         @Bean
  59         public Properties streamProcessorProperties(
  60                         QueryApplicationProperties applicationProperties,
  61                         HostInfo applicationServer)
  62         {
  63                 Properties props = new Properties();
  64
  65                 props.putAll(serializationConfig());
  66
  67                 String applicationId = applicationProperties.getApplicationId();
  68                 String bootstrapServer = applicationProperties.getBootstrapServer();
  69
  70                 props.put(StreamsConfig.APPLICATION_ID_CONFIG, applicationId);
  71                 props.put(StreamsConfig.APPLICATION_SERVER_CONFIG, applicationServer.host() + ":" + applicationServer.port());
  72                 props.put(StreamsConfig.BOOTSTRAP_SERVERS_CONFIG, bootstrapServer);
  73                 props.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");
  74
  75                 return props;
  76         }
  77
  78         static Properties serializationConfig()
  79         {
  80                 Properties props = new Properties();
  81
  82                 props.put(StreamsConfig.DEFAULT_KEY_SERDE_CLASS_CONFIG, Serdes.String().getClass().getName());
  83                 props.put(StreamsConfig.DEFAULT_VALUE_SERDE_CLASS_CONFIG, JsonSerde.class.getName());
  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 userStoreSupplier,
 100                         KeyValueBytesStoreSupplier rankingStoreSupplier,
 101                         ConfigurableApplicationContext context)
 102         {
 103                 QueryStreamProcessor streamProcessor = new QueryStreamProcessor(
 104                                 streamProcessorProperties,
 105                                 applicationServer,
 106                                 applicationProperties.getUsersInputTopic(),
 107                                 applicationProperties.getRankingInputTopic(),
 108                                 userStoreSupplier,
 109                                 rankingStoreSupplier);
 110
 111                 streamProcessor.streams.setUncaughtExceptionHandler((Throwable e) ->
 112                 {
 113                         log.error("Unexpected error!", e);
 114                         CompletableFuture.runAsync(() ->
 115                         {
 116                                 log.info("Stopping application...");
 117                                 SpringApplication.exit(context, () -> 1);
 118                         });
 119                         return SHUTDOWN_CLIENT;
 120                 });
 121
 122                 return streamProcessor;
 123         }
 124
 125         @Bean
 126         public KeyValueBytesStoreSupplier userStoreSupplier()
 127         {
 128                 return Stores.persistentKeyValueStore(USER_STORE_NAME);
 129         }
 130
 131         @Bean
 132         public KeyValueBytesStoreSupplier rankingStoreSupplier()
 133         {
 134                 return Stores.persistentKeyValueStore(RANKING_STORE_NAME);
 135         }
 136 }