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 e40d950..00e0c6f 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
@@ -1,8 +1,7 @@
 package de.juplo.kafka.chat.backend.persistence.inmemory;
 
 import de.juplo.kafka.chat.backend.ChatBackendProperties;
-import de.juplo.kafka.chat.backend.api.KafkaLikeShardingStrategy;
-import de.juplo.kafka.chat.backend.api.ShardingStrategy;
+import de.juplo.kafka.chat.backend.ChatBackendProperties.ShardingStrategyType;
 import de.juplo.kafka.chat.backend.domain.ChatHome;
 import de.juplo.kafka.chat.backend.persistence.StorageStrategy;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
@@ -10,6 +9,7 @@ import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 
 import java.time.Clock;
+import java.util.stream.IntStream;
 
 
 @ConditionalOnProperty(
@@ -21,21 +21,32 @@ import java.time.Clock;
 public class InMemoryServicesConfiguration
 {
   @Bean
-  ChatHome[] chatHomes(
+  @ConditionalOnProperty(
+      prefix = "chat.backend.inmemory",
+      name = "sharding-strategy",
+      havingValue = "none",
+      matchIfMissing = true)
+  ChatHome noneShardingChatHome()
+  {
+    return new SimpleChatHome();
+  }
+
+  @Bean
+  @ConditionalOnProperty(
+      prefix = "chat.backend.inmemory",
+      name = "sharding-strategy",
+      havingValue = "kafkalike")
+  ChatHome kafkalikeShardingChatHome(
       ChatBackendProperties properties,
-      InMemoryChatHomeService chatHomeService,
-      StorageStrategy storageStrategy)
+      InMemoryChatHomeService chatHomeService)
   {
-    ChatHome[] chatHomes = new ChatHome[properties.getInmemory().getNumShards()];
-    storageStrategy
-        .read()
-        .subscribe(chatRoom ->
-        {
-          int shard = chatRoom.getShard();
-          if (chatHomes[shard] == null)
-            chatHomes[shard] = new ChatHome(chatHomeService, shard);
-        });
-    return chatHomes;
+    int numShards = properties.getInmemory().getNumShards();
+    SimpleChatHome[] chatHomes = new SimpleChatHome[numShards];
+    IntStream
+        .of(properties.getInmemory().getOwnedShards())
+        .forEach(shard -> chatHomes[shard] = new SimpleChatHome(chatHomeService, shard));
+    ShardingStrategy strategy = new KafkaLikeShardingStrategy(numShards);
+    return new ShardedChatHome(chatHomes, strategy);
   }
 
   @Bean
@@ -43,19 +54,29 @@ public class InMemoryServicesConfiguration
       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(
-        properties.getInmemory().getNumShards(),
-        properties.getInmemory().getOwnedShards(),
+        numShards,
+        ownedShards,
         storageStrategy.read());
   }
 
   @Bean
   InMemoryChatRoomFactory chatRoomFactory(
+      InMemoryChatHomeService service,
       ShardingStrategy strategy,
       Clock clock,
       ChatBackendProperties properties)
   {
     return new InMemoryChatRoomFactory(
+        service,
         strategy,
         clock,
         properties.getChatroomBufferSize());