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   KafkaChatHomeService 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       ChannelMediator channelMediator)
 129   {
 130     InfoChannel infoChannel = new InfoChannel(
 131         properties.getKafka().getInfoChannelTopic(),
 132         producer,
 133         infoChannelConsumer,
 134         properties.getKafka().getPollingInterval(),
 135         properties.getKafka().getNumPartitions(),
 136         properties.getKafka().getInstanceUri());
 137     channelMediator.setInfoChannel(infoChannel);
 138     return infoChannel;
 139   }
 140
 141   @Bean
 142   DataChannel dataChannel(
 143       ChatBackendProperties properties,
 144       Producer<String, AbstractMessageTo> producer,
 145       Consumer<String, AbstractMessageTo> dataChannelConsumer,
 146       ZoneId zoneId,
 147       Clock clock,
 148       ChannelMediator channelMediator,
 149       ShardingPublisherStrategy shardingPublisherStrategy)
 150   {
 151     return new DataChannel(
 152         properties.getInstanceId(),
 153         properties.getKafka().getDataChannelTopic(),
 154         producer,
 155         dataChannelConsumer,
 156         zoneId,
 157         properties.getKafka().getNumPartitions(),
 158         properties.getKafka().getPollingInterval(),
 159         properties.getChatroomBufferSize(),
 160         clock,
 161         channelMediator,
 162         shardingPublisherStrategy);
 163   }
 164
 165   @Bean
 166   ChannelMediator channelMediator()
 167   {
 168     return new ChannelMediator();
 169   }
 170
 171   @Bean
 172   Producer<String, AbstractMessageTo>  producer(
 173       Properties defaultProducerProperties,
 174       ChatBackendProperties chatBackendProperties,
 175       StringSerializer stringSerializer,
 176       JsonSerializer<AbstractMessageTo> messageSerializer)
 177   {
 178     Map<String, Object> properties = new HashMap<>();
 179     defaultProducerProperties.forEach((key, value) -> properties.put(key.toString(), value));
 180     properties.put(
 181         ProducerConfig.CLIENT_ID_CONFIG,
 182         chatBackendProperties.getKafka().getClientIdPrefix() + "_PRODUCER");
 183     return new KafkaProducer<>(
 184         properties,
 185         stringSerializer,
 186         messageSerializer);
 187   }
 188
 189   @Bean
 190   StringSerializer stringSerializer()
 191   {
 192     return new StringSerializer();
 193   }
 194
 195   @Bean
 196   JsonSerializer<AbstractMessageTo> chatMessageSerializer(String typeMappings)
 197   {
 198     JsonSerializer<AbstractMessageTo> serializer = new JsonSerializer<>();
 199     serializer.configure(
 200         Map.of(
 201             JsonSerializer.TYPE_MAPPINGS, typeMappings),
 202         false);
 203     return serializer;
 204   }
 205
 206   @Bean
 207   Consumer<String, AbstractMessageTo>  infoChannelConsumer(
 208       Properties defaultConsumerProperties,
 209       ChatBackendProperties chatBackendProperties,
 210       StringDeserializer stringDeserializer,
 211       JsonDeserializer<AbstractMessageTo> messageDeserializer)
 212   {
 213     Map<String, Object> properties = new HashMap<>();
 214     defaultConsumerProperties.forEach((key, value) -> properties.put(key.toString(), value));
 215     properties.put(
 216         ConsumerConfig.CLIENT_ID_CONFIG,
 217         chatBackendProperties.getKafka().getClientIdPrefix() + "_INFO_CHANNEL_CONSUMER");
 218     properties.put(
 219         ConsumerConfig.GROUP_ID_CONFIG,
 220         "info_channel");
 221     return new KafkaConsumer<>(
 222         properties,
 223         stringDeserializer,
 224         messageDeserializer);
 225   }
 226
 227   @Bean
 228   Consumer<String, AbstractMessageTo>  dataChannelConsumer(
 229       Properties defaultConsumerProperties,
 230       ChatBackendProperties chatBackendProperties,
 231       StringDeserializer stringDeserializer,
 232       JsonDeserializer<AbstractMessageTo> messageDeserializer)
 233   {
 234     Map<String, Object> properties = new HashMap<>();
 235     defaultConsumerProperties.forEach((key, value) -> properties.put(key.toString(), value));
 236     properties.put(
 237         ConsumerConfig.CLIENT_ID_CONFIG,
 238         chatBackendProperties.getKafka().getClientIdPrefix() + "_DATA_CHANNEL_CONSUMER");
 239     properties.put(
 240         ConsumerConfig.GROUP_ID_CONFIG,
 241         "data_channel");
 242     return new KafkaConsumer<>(
 243         properties,
 244         stringDeserializer,
 245         messageDeserializer);
 246   }
 247
 248   @Bean
 249   StringDeserializer stringDeserializer()
 250   {
 251     return new StringDeserializer();
 252   }
 253
 254   @Bean
 255   JsonDeserializer<AbstractMessageTo> chatMessageDeserializer(String typeMappings)
 256   {
 257     JsonDeserializer<AbstractMessageTo> deserializer = new JsonDeserializer<>();
 258     deserializer.configure(
 259         Map.of(
 260             JsonDeserializer.TRUSTED_PACKAGES, getClass().getPackageName(),
 261             JsonDeserializer.TYPE_MAPPINGS, typeMappings),
 262         false );
 263     return deserializer;
 264   }
 265
 266   @Bean
 267   String typeMappings ()
 268   {
 269     return
 270         "event_chatroom_created:" +  EventChatRoomCreated.class.getCanonicalName() + "," +
 271         "event_chatmessage_received:" + EventChatMessageReceivedTo.class.getCanonicalName();
 272   }
 273
 274   @Bean
 275   Properties defaultProducerProperties(ChatBackendProperties chatBackendProperties)
 276   {
 277     Properties properties = new Properties();
 278     properties.setProperty(
 279         ProducerConfig.BOOTSTRAP_SERVERS_CONFIG,
 280         chatBackendProperties.getKafka().getBootstrapServers());
 281     return properties;
 282   }
 283
 284   @Bean
 285   Properties defaultConsumerProperties(ChatBackendProperties chatBackendProperties)
 286   {
 287     Properties properties = new Properties();
 288     properties.setProperty(
 289         ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG,
 290         chatBackendProperties.getKafka().getBootstrapServers());
 291     properties.setProperty(
 292         ConsumerConfig.ENABLE_AUTO_COMMIT_CONFIG,
 293         "false");
 294     properties.setProperty(
 295         ConsumerConfig.AUTO_OFFSET_RESET_CONFIG,
 296         "earliest");
 297     return properties;
 298   }
 299
 300   @Bean
 301   ShardingPublisherStrategy shardingPublisherStrategy(
 302       ChatBackendProperties properties)
 303   {
 304     String[] parts = properties.getKafka().getHaproxyRuntimeApi().split(":");
 305     InetSocketAddress haproxyAddress = new InetSocketAddress(parts[0], Integer.valueOf(parts[1]));
 306     return new HaproxyShardingPublisherStrategy(
 307         haproxyAddress,
 308         properties.getKafka().getHaproxyMap(),
 309         properties.getInstanceId());
 310   }
 311
 312   @Bean
 313   ZoneId zoneId()
 314   {
 315     return ZoneId.systemDefault();
 316   }
 317 }