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