juplo.de Git - demos/kafka/chat/blob - src/main/java/de/juplo/kafka/chat/backend/implementation/kafka/KafkaServicesConfiguration.java

   1 package de.juplo.kafka.chat.backend.implementation.kafka;
   2
   3 import de.juplo.kafka.chat.backend.ChatBackendProperties;
   4 import de.juplo.kafka.chat.backend.domain.ChatHomeService;
   5 import de.juplo.kafka.chat.backend.domain.ShardingPublisherStrategy;
   6 import de.juplo.kafka.chat.backend.implementation.haproxy.HaproxyShardingPublisherStrategy;
   7 import de.juplo.kafka.chat.backend.implementation.kafka.messages.AbstractMessageTo;
   8 import de.juplo.kafka.chat.backend.implementation.kafka.messages.data.EventChatMessageReceivedTo;
   9 import de.juplo.kafka.chat.backend.implementation.kafka.messages.info.EventChatRoomCreated;
  10 import org.apache.kafka.clients.consumer.Consumer;
  11 import org.apache.kafka.clients.consumer.ConsumerConfig;
  12 import org.apache.kafka.clients.consumer.KafkaConsumer;
  13 import org.apache.kafka.clients.producer.KafkaProducer;
  14 import org.apache.kafka.clients.producer.Producer;
  15 import org.apache.kafka.clients.producer.ProducerConfig;
  16 import org.apache.kafka.common.TopicPartition;
  17 import org.apache.kafka.common.serialization.StringDeserializer;
  18 import org.apache.kafka.common.serialization.StringSerializer;
  19 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
  20 import org.springframework.context.annotation.Bean;
  21 import org.springframework.context.annotation.Configuration;
  22 import org.springframework.kafka.support.serializer.JsonDeserializer;
  23 import org.springframework.kafka.support.serializer.JsonSerializer;
  24 import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
  25
  26 import java.net.InetSocketAddress;
  27 import java.time.Clock;
  28 import java.time.ZoneId;
  29 import java.util.HashMap;
  30 import java.util.List;
  31 import java.util.Map;
  32 import java.util.Properties;
  33
  34
  35 @ConditionalOnProperty(
  36     prefix = "chat.backend",
  37     name = "services",
  38     havingValue = "kafka")
  39 @Configuration
  40 public class KafkaServicesConfiguration
  41 {
  42   @Bean
  43   ConsumerTaskRunner consumerTaskRunner(
  44       ConsumerTaskExecutor infoChannelConsumerTaskExecutor,
  45       ConsumerTaskExecutor dataChannelConsumerTaskExecutor,
  46       InfoChannel infoChannel)
  47   {
  48     return new ConsumerTaskRunner(
  49         infoChannelConsumerTaskExecutor,
  50         dataChannelConsumerTaskExecutor,
  51         infoChannel);
  52   }
  53
  54   @Bean
  55   ConsumerTaskExecutor infoChannelConsumerTaskExecutor(
  56       ThreadPoolTaskExecutor taskExecutor,
  57       InfoChannel infoChannel,
  58       Consumer<String, AbstractMessageTo> infoChannelConsumer,
  59       WorkAssignor infoChannelWorkAssignor)
  60   {
  61     return new ConsumerTaskExecutor(
  62         taskExecutor,
  63         infoChannel,
  64         infoChannelConsumer,
  65         infoChannelWorkAssignor);
  66   }
  67
  68   @Bean
  69   WorkAssignor infoChannelWorkAssignor(ChatBackendProperties properties)
  70   {
  71     return consumer ->
  72     {
  73       String topic = properties.getKafka().getInfoChannelTopic();
  74       List<TopicPartition> partitions = consumer
  75           .partitionsFor(topic)
  76           .stream()
  77           .map(partitionInfo ->
  78               new TopicPartition(topic, partitionInfo.partition()))
  79           .toList();
  80       consumer.assign(partitions);
  81     };
  82   }
  83
  84   @Bean
  85   ConsumerTaskExecutor dataChannelConsumerTaskExecutor(
  86       ThreadPoolTaskExecutor taskExecutor,
  87       DataChannel dataChannel,
  88       Consumer<String, AbstractMessageTo> dataChannelConsumer,
  89       WorkAssignor dataChannelWorkAssignor)
  90   {
  91     return new ConsumerTaskExecutor(
  92         taskExecutor,
  93         dataChannel,
  94         dataChannelConsumer,
  95         dataChannelWorkAssignor);
  96   }
  97
  98   @Bean
  99   WorkAssignor dataChannelWorkAssignor(
 100       ChatBackendProperties properties,
 101       DataChannel dataChannel)
 102   {
 103     return consumer ->
 104     {
 105       List<String> topics =
 106           List.of(properties.getKafka().getDataChannelTopic());
 107       consumer.subscribe(topics, dataChannel);
 108     };
 109   }
 110
 111   @Bean
 112     ChatHomeService kafkaChatHome(
 113       ChatBackendProperties properties,
 114       InfoChannel infoChannel,
 115       DataChannel dataChannel)
 116   {
 117     return new KafkaChatHomeService(
 118         properties.getKafka().getNumPartitions(),
 119         infoChannel,
 120         dataChannel);
 121   }
 122
 123   @Bean
 124   InfoChannel infoChannel(
 125       ChatBackendProperties properties,
 126       Producer<String, AbstractMessageTo> producer,
 127       Consumer<String, AbstractMessageTo> infoChannelConsumer)
 128   {
 129     return new InfoChannel(
 130         properties.getKafka().getInfoChannelTopic(),
 131         producer,
 132         infoChannelConsumer,
 133         properties.getKafka().getInstanceUri());
 134   }
 135
 136   @Bean
 137   DataChannel dataChannel(
 138       ChatBackendProperties properties,
 139       Producer<String, AbstractMessageTo> producer,
 140       Consumer<String, AbstractMessageTo> dataChannelConsumer,
 141       ZoneId zoneId,
 142       Clock clock,
 143       InfoChannel infoChannel,
 144       ShardingPublisherStrategy shardingPublisherStrategy)
 145   {
 146     return new DataChannel(
 147         properties.getInstanceId(),
 148         properties.getKafka().getDataChannelTopic(),
 149         producer,
 150         dataChannelConsumer,
 151         zoneId,
 152         properties.getKafka().getNumPartitions(),
 153         properties.getChatroomBufferSize(),
 154         clock,
 155         infoChannel,
 156         shardingPublisherStrategy);
 157   }
 158
 159   @Bean
 160   Producer<String, AbstractMessageTo>  producer(
 161       Properties defaultProducerProperties,
 162       ChatBackendProperties chatBackendProperties,
 163       StringSerializer stringSerializer,
 164       JsonSerializer<AbstractMessageTo> messageSerializer)
 165   {
 166     Map<String, Object> properties = new HashMap<>();
 167     defaultProducerProperties.forEach((key, value) -> properties.put(key.toString(), value));
 168     properties.put(
 169         ProducerConfig.CLIENT_ID_CONFIG,
 170         chatBackendProperties.getKafka().getClientIdPrefix() + "_PRODUCER");
 171     return new KafkaProducer<>(
 172         properties,
 173         stringSerializer,
 174         messageSerializer);
 175   }
 176
 177   @Bean
 178   StringSerializer stringSerializer()
 179   {
 180     return new StringSerializer();
 181   }
 182
 183   @Bean
 184   JsonSerializer<AbstractMessageTo> chatMessageSerializer(String typeMappings)
 185   {
 186     JsonSerializer<AbstractMessageTo> serializer = new JsonSerializer<>();
 187     serializer.configure(
 188         Map.of(
 189             JsonSerializer.TYPE_MAPPINGS, typeMappings),
 190         false);
 191     return serializer;
 192   }
 193
 194   @Bean
 195   Consumer<String, AbstractMessageTo>  infoChannelConsumer(
 196       Properties defaultConsumerProperties,
 197       ChatBackendProperties chatBackendProperties,
 198       StringDeserializer stringDeserializer,
 199       JsonDeserializer<AbstractMessageTo> messageDeserializer)
 200   {
 201     Map<String, Object> properties = new HashMap<>();
 202     defaultConsumerProperties.forEach((key, value) -> properties.put(key.toString(), value));
 203     properties.put(
 204         ConsumerConfig.CLIENT_ID_CONFIG,
 205         chatBackendProperties.getKafka().getClientIdPrefix() + "_INFO_CHANNEL_CONSUMER");
 206     properties.put(
 207         ConsumerConfig.GROUP_ID_CONFIG,
 208         "info_channel");
 209     return new KafkaConsumer<>(
 210         properties,
 211         stringDeserializer,
 212         messageDeserializer);
 213   }
 214
 215   @Bean
 216   Consumer<String, AbstractMessageTo>  dataChannelConsumer(
 217       Properties defaultConsumerProperties,
 218       ChatBackendProperties chatBackendProperties,
 219       StringDeserializer stringDeserializer,
 220       JsonDeserializer<AbstractMessageTo> messageDeserializer)
 221   {
 222     Map<String, Object> properties = new HashMap<>();
 223     defaultConsumerProperties.forEach((key, value) -> properties.put(key.toString(), value));
 224     properties.put(
 225         ConsumerConfig.CLIENT_ID_CONFIG,
 226         chatBackendProperties.getKafka().getClientIdPrefix() + "_DATA_CHANNEL_CONSUMER");
 227     properties.put(
 228         ConsumerConfig.GROUP_ID_CONFIG,
 229         "data_channel");
 230     return new KafkaConsumer<>(
 231         properties,
 232         stringDeserializer,
 233         messageDeserializer);
 234   }
 235
 236   @Bean
 237   StringDeserializer stringDeserializer()
 238   {
 239     return new StringDeserializer();
 240   }
 241
 242   @Bean
 243   JsonDeserializer<AbstractMessageTo> chatMessageDeserializer(String typeMappings)
 244   {
 245     JsonDeserializer<AbstractMessageTo> deserializer = new JsonDeserializer<>();
 246     deserializer.configure(
 247         Map.of(
 248             JsonDeserializer.TRUSTED_PACKAGES, getClass().getPackageName(),
 249             JsonDeserializer.TYPE_MAPPINGS, typeMappings),
 250         false );
 251     return deserializer;
 252   }
 253
 254   @Bean
 255   String typeMappings ()
 256   {
 257     return
 258         "event_chatroom_created:" +  EventChatRoomCreated.class.getCanonicalName() + "," +
 259         "event_chatmessage_received:" + EventChatMessageReceivedTo.class.getCanonicalName();
 260   }
 261
 262   @Bean
 263   Properties defaultProducerProperties(ChatBackendProperties chatBackendProperties)
 264   {
 265     Properties properties = new Properties();
 266     properties.setProperty(
 267         ProducerConfig.BOOTSTRAP_SERVERS_CONFIG,
 268         chatBackendProperties.getKafka().getBootstrapServers());
 269     return properties;
 270   }
 271
 272   @Bean
 273   Properties defaultConsumerProperties(ChatBackendProperties chatBackendProperties)
 274   {
 275     Properties properties = new Properties();
 276     properties.setProperty(
 277         ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG,
 278         chatBackendProperties.getKafka().getBootstrapServers());
 279     properties.setProperty(
 280         ConsumerConfig.ENABLE_AUTO_COMMIT_CONFIG,
 281         "false");
 282     properties.setProperty(
 283         ConsumerConfig.AUTO_OFFSET_RESET_CONFIG,
 284         "earliest");
 285     return properties;
 286   }
 287
 288   @Bean
 289   ShardingPublisherStrategy shardingPublisherStrategy(
 290       ChatBackendProperties properties)
 291   {
 292     String[] parts = properties.getHaproxyRuntimeApi().split(":");
 293     InetSocketAddress haproxyAddress = new InetSocketAddress(parts[0], Integer.valueOf(parts[1]));
 294     return new HaproxyShardingPublisherStrategy(
 295         haproxyAddress,
 296         properties.getHaproxyMap(),
 297         properties.getInstanceId());
 298   }
 299
 300   @Bean
 301   ZoneId zoneId()
 302   {
 303     return ZoneId.systemDefault();
 304   }
 305 }