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