WIP:mongodb map vs subscribe - subscribe rausgezogen

[demos/kafka/chat] / src / main / java / de / juplo / kafka / chat / backend / implementation / StorageStrategy.java

diff --git a/src/main/java/de/juplo/kafka/chat/backend/implementation/StorageStrategy.java b/src/main/java/de/juplo/kafka/chat/backend/implementation/StorageStrategy.java
index 8f91ad0..990d001 100644 (file)
--- a/src/main/java/de/juplo/kafka/chat/backend/implementation/StorageStrategy.java
+++ b/src/main/java/de/juplo/kafka/chat/backend/implementation/StorageStrategy.java
@@ -16,38 +16,65 @@ public interface StorageStrategy
 {
   Logger log = LoggerFactory.getLogger(StorageStrategy.class.getCanonicalName());
 
-  default void write(ChatHomeService chatHomeService)
+  default Flux<ChatRoomInfo> write(ChatHomeService chatHomeService)
   {
-    writeChatRoomInfo(
+    return write(
+        chatHomeService,
+        this::logSuccessChatHomeService,
+        this::logFailureChatHomeService);
+  }
+
+  default Flux<ChatRoomInfo> write(
+      ChatHomeService chatHomeService,
+      ChatHomeServiceWrittenSuccessCallback successCallback,
+      ChatHomeServiceWrittenFailureCallback failureCallback)
+  {
+    return writeChatRoomInfo(
         chatHomeService
             .getChatRoomInfo()
+            .doOnComplete(() -> successCallback.accept(chatHomeService))
+            .doOnError(throwable -> failureCallback.accept(chatHomeService, throwable))
             .doOnNext(chatRoomInfo ->
                 writeChatRoomData(
                     chatRoomInfo.getId(),
                     chatHomeService
                         .getChatRoomData(chatRoomInfo.getId())
                         .flatMapMany(chatRoomData -> chatRoomData.getMessages()),
+
                     this::logSuccessChatRoom,
-                    this::logFailureChatRoom)));
+                    this::logFailureChatRoom).subscribe()));
   }
 
-  void writeChatRoomInfo(Flux<ChatRoomInfo> chatRoomInfoFlux);
+  Flux<ChatRoomInfo> writeChatRoomInfo(Flux<ChatRoomInfo> chatRoomInfoFlux);
   Flux<ChatRoomInfo> readChatRoomInfo();
-  default void writeChatRoomData(
+  default Flux<Message> writeChatRoomData(
       UUID chatRoomId,
       Flux<Message> messageFlux,
       ChatRoomWrittenSuccessCallback successCallback,
       ChatRoomWrittenFailureCallback failureCallback)
   {
-    writeChatRoomData(
+    return writeChatRoomData(
         chatRoomId,
         messageFlux
             .doOnComplete(() -> successCallback.accept(chatRoomId))
             .doOnError(throwable -> failureCallback.accept(chatRoomId, throwable)));
   }
-  void writeChatRoomData(UUID chatRoomId, Flux<Message> messageFlux);
+  Flux<Message> writeChatRoomData(UUID chatRoomId, Flux<Message> messageFlux);
   Flux<Message> readChatRoomData(UUID chatRoomId);
 
+  interface ChatHomeServiceWrittenSuccessCallback extends Consumer<ChatHomeService> {}
+  interface ChatHomeServiceWrittenFailureCallback extends BiConsumer<ChatHomeService, Throwable> {}
+
+  default void logSuccessChatHomeService(ChatHomeService chatHomeService)
+  {
+    log.info("Successfully stored {}", chatHomeService);
+  }
+
+  default void logFailureChatHomeService(ChatHomeService chatHomeService, Throwable throwable)
+  {
+    log.error("Could not store {}: {}", chatHomeService, throwable);
+  }
+
   interface ChatRoomWrittenSuccessCallback extends Consumer<UUID> {}
   interface ChatRoomWrittenFailureCallback extends BiConsumer<UUID, Throwable> {}