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