WIP

[demos/kafka/chat] / src / main / java / de / juplo / kafka / chat / backend / persistence / inmemory / InMemoryServicesConfiguration.java

diff --git a/src/main/java/de/juplo/kafka/chat/backend/persistence/inmemory/InMemoryServicesConfiguration.java b/src/main/java/de/juplo/kafka/chat/backend/persistence/inmemory/InMemoryServicesConfiguration.java
index 20a1b5f..ee41c4f 100644 (file)
--- a/src/main/java/de/juplo/kafka/chat/backend/persistence/inmemory/InMemoryServicesConfiguration.java
+++ b/src/main/java/de/juplo/kafka/chat/backend/persistence/inmemory/InMemoryServicesConfiguration.java
@@ -1,25 +1,84 @@
 package de.juplo.kafka.chat.backend.persistence.inmemory;
 
 import de.juplo.kafka.chat.backend.ChatBackendProperties;
+import de.juplo.kafka.chat.backend.domain.ChatHome;
 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;
+import java.util.stream.IntStream;
 
 
+@ConditionalOnProperty(
+    prefix = "chat.backend",
+    name = "services",
+    havingValue = "inmemory",
+    matchIfMissing = true)
 @Configuration
 public class InMemoryServicesConfiguration
 {
   @Bean
-  InMemoryChatHomeService chatHomeService(
-      StorageStrategy storageStrategy,
+  @ConditionalOnProperty(
+      prefix = "chat.backend.inmemory",
+      name = "sharding-strategy",
+      havingValue = "none",
+      matchIfMissing = true)
+  ChatHome noneShardingChatHome(StorageStrategy storageStrategy)
+  {
+    return new SimpleChatHome(storageStrategy.read());
+  }
+
+  @Bean
+  @ConditionalOnProperty(
+      prefix = "chat.backend.inmemory",
+      name = "sharding-strategy",
+      havingValue = "kafkalike")
+  ChatHome kafkalikeShardingChatHome(
+      ChatBackendProperties properties,
+      StorageStrategy storageStrategy)
+  {
+    int numShards = properties.getInmemory().getNumShards();
+    SimpleChatHome[] chatHomes = new SimpleChatHome[numShards];
+    IntStream
+        .of(properties.getInmemory().getOwnedShards())
+        .forEach(shard -> chatHomes[shard] = new SimpleChatHome(shard, storageStrategy.read()));
+    ShardingStrategy strategy = new KafkaLikeShardingStrategy(numShards);
+    return new ShardedChatHome(chatHomes, strategy);
+  }
+
+  @Bean
+  InMemoryChatRoomFactory chatRoomFactory(
+      ShardingStrategy strategy,
       Clock clock,
       ChatBackendProperties properties)
   {
-    return new InMemoryChatHomeService(
-        storageStrategy.read(),
+    return new InMemoryChatRoomFactory(
+        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());
+  }
 }