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       InfoChannel infoChannel)
  44   {
  45     return new ConsumerTaskRunner(
  46         infoChannelConsumerTaskExecutor,
  47         dataChannelConsumerTaskExecutor,
  48         infoChannel);
  49   }
  50
  51   @Bean
  52   ConsumerTaskExecutor infoChannelConsumerTaskExecutor(
  53       ThreadPoolTaskExecutor taskExecutor,
  54       InfoChannel infoChannel,
  55       Consumer<String, AbstractMessageTo> infoChannelConsumer,
  56       WorkAssignor infoChannelWorkAssignor)
  57   {
  58     return new ConsumerTaskExecutor(
  59         taskExecutor,
  60         infoChannel,
  61         infoChannelConsumer,
  62         infoChannelWorkAssignor);
  63   }
  64
  65   @Bean
  66   WorkAssignor infoChannelWorkAssignor(ChatBackendProperties properties)
  67   {
  68     return consumer ->
  69     {
  70       String topic = properties.getKafka().getInfoChannelTopic();
  71       List<TopicPartition> partitions = consumer
  72           .partitionsFor(topic)
  73           .stream()
  74           .map(partitionInfo ->
  75               new TopicPartition(topic, partitionInfo.partition()))
  76           .toList();
  77       consumer.assign(partitions);
  78     };
  79   }
  80
  81   @Bean
  82   ConsumerTaskExecutor dataChannelConsumerTaskExecutor(
  83       ThreadPoolTaskExecutor taskExecutor,
  84       DataChannel dataChannel,
  85       Consumer<String, AbstractMessageTo> dataChannelConsumer,
  86       WorkAssignor dataChannelWorkAssignor)
  87   {
  88     return new ConsumerTaskExecutor(
  89         taskExecutor,
  90         dataChannel,
  91         dataChannelConsumer,
  92         dataChannelWorkAssignor);
  93   }
  94
  95   @Bean
  96   WorkAssignor dataChannelWorkAssignor(
  97       ChatBackendProperties properties,
  98       DataChannel dataChannel)
  99   {
 100     return consumer ->
 101     {
 102       List<String> topics =
 103           List.of(properties.getKafka().getDataChannelTopic());
 104       consumer.subscribe(topics, dataChannel);
 105     };
 106   }
 107
 108   @Bean
 109     ChatHomeService kafkaChatHome(
 110       ChatBackendProperties properties,
 111       InfoChannel infoChannel,
 112       DataChannel dataChannel)
 113   {
 114     return new KafkaChatHomeService(
 115         properties.getKafka().getNumPartitions(),
 116         infoChannel,
 117         dataChannel);
 118   }
 119
 120   @Bean
 121   InfoChannel infoChannel(
 122       ChatBackendProperties properties,
 123       Producer<String, AbstractMessageTo> producer,
 124       Consumer<String, AbstractMessageTo> infoChannelConsumer)
 125   {
 126     return new InfoChannel(
 127         properties.getKafka().getInfoChannelTopic(),
 128         producer,
 129         infoChannelConsumer,
 130         properties.getKafka().getInstanceUri());
 131   }
 132
 133   @Bean
 134   DataChannel dataChannel(
 135       ChatBackendProperties properties,
 136       Producer<String, AbstractMessageTo> producer,
 137       Consumer<String, AbstractMessageTo> dataChannelConsumer,
 138       ZoneId zoneId,
 139       Clock clock,
 140       InfoChannel infoChannel)
 141   {
 142     return new DataChannel(
 143         properties.getKafka().getDataChannelTopic(),
 144         producer,
 145         dataChannelConsumer,
 146         zoneId,
 147         properties.getKafka().getNumPartitions(),
 148         properties.getChatroomBufferSize(),
 149         clock,
 150         infoChannel);
 151   }
 152
 153   @Bean
 154   Producer<String, AbstractMessageTo>  producer(
 155       Properties defaultProducerProperties,
 156       ChatBackendProperties chatBackendProperties,
 157       StringSerializer stringSerializer,
 158       JsonSerializer<AbstractMessageTo> messageSerializer)
 159   {
 160     Map<String, Object> properties = new HashMap<>();
 161     defaultProducerProperties.forEach((key, value) -> properties.put(key.toString(), value));
 162     properties.put(
 163         ProducerConfig.CLIENT_ID_CONFIG,
 164         chatBackendProperties.getKafka().getClientIdPrefix() + "_PRODUCER");
 165     return new KafkaProducer<>(
 166         properties,
 167         stringSerializer,
 168         messageSerializer);
 169   }
 170
 171   @Bean
 172   StringSerializer stringSerializer()
 173   {
 174     return new StringSerializer();
 175   }
 176
 177   @Bean
 178   JsonSerializer<AbstractMessageTo> chatMessageSerializer(String typeMappings)
 179   {
 180     JsonSerializer<AbstractMessageTo> serializer = new JsonSerializer<>();
 181     serializer.configure(
 182         Map.of(
 183             JsonSerializer.TYPE_MAPPINGS, typeMappings),
 184         false);
 185     return serializer;
 186   }
 187
 188   @Bean
 189   Consumer<String, AbstractMessageTo>  infoChannelConsumer(
 190       Properties defaultConsumerProperties,
 191       ChatBackendProperties chatBackendProperties,
 192       StringDeserializer stringDeserializer,
 193       JsonDeserializer<AbstractMessageTo> messageDeserializer)
 194   {
 195     Map<String, Object> properties = new HashMap<>();
 196     defaultConsumerProperties.forEach((key, value) -> properties.put(key.toString(), value));
 197     properties.put(
 198         ConsumerConfig.CLIENT_ID_CONFIG,
 199         chatBackendProperties.getKafka().getClientIdPrefix() + "_INFO_CHANNEL_CONSUMER");
 200     properties.put(
 201         ConsumerConfig.GROUP_ID_CONFIG,
 202         "info_channel");
 203     return new KafkaConsumer<>(
 204         properties,
 205         stringDeserializer,
 206         messageDeserializer);
 207   }
 208
 209   @Bean
 210   Consumer<String, AbstractMessageTo>  dataChannelConsumer(
 211       Properties defaultConsumerProperties,
 212       ChatBackendProperties chatBackendProperties,
 213       StringDeserializer stringDeserializer,
 214       JsonDeserializer<AbstractMessageTo> messageDeserializer)
 215   {
 216     Map<String, Object> properties = new HashMap<>();
 217     defaultConsumerProperties.forEach((key, value) -> properties.put(key.toString(), value));
 218     properties.put(
 219         ConsumerConfig.CLIENT_ID_CONFIG,
 220         chatBackendProperties.getKafka().getClientIdPrefix() + "_DATA_CHANNEL_CONSUMER");
 221     properties.put(
 222         ConsumerConfig.GROUP_ID_CONFIG,
 223         "data_channel");
 224     return new KafkaConsumer<>(
 225         properties,
 226         stringDeserializer,
 227         messageDeserializer);
 228   }
 229
 230   @Bean
 231   StringDeserializer stringDeserializer()
 232   {
 233     return new StringDeserializer();
 234   }
 235
 236   @Bean
 237   JsonDeserializer<AbstractMessageTo> chatMessageDeserializer(String typeMappings)
 238   {
 239     JsonDeserializer<AbstractMessageTo> deserializer = new JsonDeserializer<>();
 240     deserializer.configure(
 241         Map.of(
 242             JsonDeserializer.TRUSTED_PACKAGES, getClass().getPackageName(),
 243             JsonDeserializer.TYPE_MAPPINGS, typeMappings),
 244         false );
 245     return deserializer;
 246   }
 247
 248   @Bean
 249   String typeMappings ()
 250   {
 251     return
 252         "event_chatroom_created:" +  EventChatRoomCreated.class.getCanonicalName() + "," +
 253         "event_chatmessage_received:" + EventChatMessageReceivedTo.class.getCanonicalName();
 254   }
 255
 256   @Bean
 257   Properties defaultProducerProperties(ChatBackendProperties chatBackendProperties)
 258   {
 259     Properties properties = new Properties();
 260     properties.setProperty(
 261         ProducerConfig.BOOTSTRAP_SERVERS_CONFIG,
 262         chatBackendProperties.getKafka().getBootstrapServers());
 263     return properties;
 264   }
 265
 266   @Bean
 267   Properties defaultConsumerProperties(ChatBackendProperties chatBackendProperties)
 268   {
 269     Properties properties = new Properties();
 270     properties.setProperty(
 271         ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG,
 272         chatBackendProperties.getKafka().getBootstrapServers());
 273     properties.setProperty(
 274         ConsumerConfig.ENABLE_AUTO_COMMIT_CONFIG,
 275         "false");
 276     properties.setProperty(
 277         ConsumerConfig.AUTO_OFFSET_RESET_CONFIG,
 278         "earliest");
 279     return properties;
 280   }
 281
 282   @Bean
 283   ZoneId zoneId()
 284   {
 285     return ZoneId.systemDefault();
 286   }
 287 }