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