package de.juplo.kafka.chat.backend.persistence.inmemory;
import de.juplo.kafka.chat.backend.ChatBackendProperties;
+import de.juplo.kafka.chat.backend.ChatBackendProperties.ShardingStrategyType;
+import de.juplo.kafka.chat.backend.domain.ShardedChatHome;
+import de.juplo.kafka.chat.backend.persistence.KafkaLikeShardingStrategy;
+import de.juplo.kafka.chat.backend.domain.ShardingStrategy;
+import de.juplo.kafka.chat.backend.domain.ChatHome;
+import de.juplo.kafka.chat.backend.domain.SimpleChatHome;
import de.juplo.kafka.chat.backend.persistence.StorageStrategy;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import java.time.Clock;
+@ConditionalOnProperty(
+ prefix = "chat.backend",
+ name = "services",
+ havingValue = "inmemory",
+ matchIfMissing = true)
@Configuration
public class InMemoryServicesConfiguration
{
+ @Bean
+ @ConditionalOnProperty(
+ prefix = "chat.backend.inmemory",
+ name = "sharding-strategy",
+ havingValue = "none",
+ matchIfMissing = true)
+ ChatHome noneShardingChatHome(InMemoryChatHomeService chatHomeService)
+ {
+ return new SimpleChatHome(chatHomeService);
+ }
+
+ @Bean
+ @ConditionalOnProperty(
+ prefix = "chat.backend.inmemory",
+ name = "sharding-strategy",
+ havingValue = "kafkalike")
+ ChatHome kafkalikeShardingChatHome(
+ ChatBackendProperties properties,
+ InMemoryChatHomeService chatHomeService,
+ StorageStrategy storageStrategy)
+ {
+ int numShards = properties.getInmemory().getNumShards();
+ SimpleChatHome[] chatHomes = new SimpleChatHome[numShards];
+ storageStrategy
+ .read()
+ .subscribe(chatRoom ->
+ {
+ int shard = chatRoom.getShard();
+ if (chatHomes[shard] == null)
+ chatHomes[shard] = new SimpleChatHome(chatHomeService, shard);
+ });
+ ShardingStrategy strategy = new KafkaLikeShardingStrategy(numShards);
+ return new ShardedChatHome(chatHomes, strategy);
+ }
+
@Bean
InMemoryChatHomeService chatHomeService(
- StorageStrategy storageStrategy,
+ ChatBackendProperties properties,
+ StorageStrategy storageStrategy)
+ {
+ ShardingStrategyType sharding =
+ properties.getInmemory().getShardingStrategy();
+ int numShards = sharding == ShardingStrategyType.none
+ ? 1
+ : properties.getInmemory().getNumShards();
+ int[] ownedShards = sharding == ShardingStrategyType.none
+ ? new int[] { 0 }
+ : properties.getInmemory().getOwnedShards();
+ return new InMemoryChatHomeService(
+ numShards,
+ ownedShards,
+ storageStrategy.read());
+ }
+
+ @Bean
+ InMemoryChatRoomFactory chatRoomFactory(
+ InMemoryChatHomeService service,
+ ShardingStrategy strategy,
Clock clock,
ChatBackendProperties properties)
{
- return new InMemoryChatHomeService(
- storageStrategy.read(),
+ return new InMemoryChatRoomFactory(
+ service,
+ strategy,
clock,
properties.getChatroomBufferSize());
}
+
+ @ConditionalOnProperty(
+ prefix = "chat.backend.inmemory",
+ name = "sharding-strategy",
+ havingValue = "none",
+ matchIfMissing = true)
+ @Bean
+ ShardingStrategy defaultShardingStrategy()
+ {
+ return chatRoomId -> 0;
+ }
+
+ @ConditionalOnProperty(
+ prefix = "chat.backend.inmemory",
+ name = "sharding-strategy",
+ havingValue = "kafkalike")
+ @Bean
+ ShardingStrategy kafkalikeShardingStrategy(ChatBackendProperties properties)
+ {
+ return new KafkaLikeShardingStrategy(
+ properties.getInmemory().getNumShards());
+ }
}