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 com.fasterxml.jackson.databind.ObjectMapper;
   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.springframework.boot.autoconfigure.web.ServerProperties;
   9 import org.springframework.boot.context.properties.EnableConfigurationProperties;
  10 import org.springframework.context.ConfigurableApplicationContext;
  11 import org.springframework.context.annotation.Bean;
  12 import org.springframework.context.annotation.Configuration;
  13
  14 import java.io.IOException;
  15 import java.net.InetSocketAddress;
  16 import java.net.Socket;
  17 import java.util.Properties;
  18
  19
  20 @Configuration
  21 @EnableConfigurationProperties(QueryApplicationProperties.class)
  22 public class QueryApplicationConfiguration
  23 {
  24         @Bean
  25         public HostInfo applicationServer(
  26                         ServerProperties serverProperties,
  27                         QueryApplicationProperties applicationProperties) throws IOException
  28         {
  29                 String host;
  30                 if (serverProperties.getAddress() == null)
  31                 {
  32                         HostInfo bootstrapServer = HostInfo.buildFromEndpoint(applicationProperties.getBootstrapServer());
  33                         Socket socket = new Socket();
  34                         socket.connect(new InetSocketAddress(bootstrapServer.host(), bootstrapServer.port()));
  35                         host = socket.getLocalAddress().getHostAddress();
  36                 }
  37                 else
  38                 {
  39                         host = serverProperties.getAddress().getHostAddress();
  40                 }
  41
  42                 Integer port = serverProperties.getPort() == null ? 8080 : serverProperties.getPort();
  43
  44                 return new HostInfo(host, port);
  45         }
  46
  47         @Bean
  48         public Properties streamProcessorProperties(
  49                         QueryApplicationProperties applicationProperties,
  50                         HostInfo applicationServer)
  51         {
  52                 Properties props = new Properties();
  53
  54                 props.putAll(serializationConfig());
  55
  56                 String applicationId = applicationProperties.getApplicationId();
  57                 String bootstrapServer = applicationProperties.getBootstrapServer();
  58
  59                 props.put(StreamsConfig.APPLICATION_ID_CONFIG, applicationId);
  60                 props.put(StreamsConfig.APPLICATION_SERVER_CONFIG, applicationServer.host() + ":" + applicationServer.port());
  61                 props.put(StreamsConfig.BOOTSTRAP_SERVERS_CONFIG, bootstrapServer);
  62                 props.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");
  63
  64                 return props;
  65         }
  66
  67         static Properties serializationConfig()
  68         {
  69                 Properties props = new Properties();
  70
  71                 props.put(StreamsConfig.DEFAULT_KEY_SERDE_CLASS_CONFIG, Serdes.String().getClass().getName());
  72                 props.put(StreamsConfig.DEFAULT_VALUE_SERDE_CLASS_CONFIG, Serdes.String().getClass().getName());
  73
  74                 return props;
  75         }
  76
  77         @Bean
  78         public QueryStreamProcessor streamProcessor(
  79                         Properties streamProcessorProperties,
  80                         HostInfo applicationServer,
  81                         QueryApplicationProperties applicationProperties,
  82                         ObjectMapper mapper,
  83                         ConfigurableApplicationContext context)
  84         {
  85                 return new QueryStreamProcessor(
  86                                 streamProcessorProperties,
  87                                 applicationServer,
  88                                 applicationProperties.getUsersInputTopic(),
  89                                 applicationProperties.getRankingInputTopic(),
  90                                 mapper,
  91                                 context);
  92         }
  93 }