feat: Added a POST-mapping to force the storing of the data

[demos/kafka/chat] / src / main / java / de / juplo / kafka / chat / backend / api / ChatBackendController.java

diff --git a/src/main/java/de/juplo/kafka/chat/backend/api/ChatBackendController.java b/src/main/java/de/juplo/kafka/chat/backend/api/ChatBackendController.java
index 385c95c..4aaf4f5 100644 (file)
--- a/src/main/java/de/juplo/kafka/chat/backend/api/ChatBackendController.java
+++ b/src/main/java/de/juplo/kafka/chat/backend/api/ChatBackendController.java
@@ -2,6 +2,7 @@ package de.juplo.kafka.chat.backend.api;
 
 import de.juplo.kafka.chat.backend.domain.ChatHome;
 import de.juplo.kafka.chat.backend.domain.Chatroom;
+import de.juplo.kafka.chat.backend.persistence.StorageStrategy;
 import lombok.RequiredArgsConstructor;
 import org.springframework.http.MediaType;
 import org.springframework.web.bind.annotation.*;
@@ -10,8 +11,9 @@ import reactor.core.publisher.Mono;
 
 import java.time.Clock;
 import java.time.LocalDateTime;
-import java.util.Collection;
+import java.util.Optional;
 import java.util.UUID;
+import java.util.stream.Stream;
 
 
 @RestController
@@ -20,24 +22,25 @@ public class ChatBackendController
 {
   private final ChatHome chatHome;
   private final Clock clock;
+  private final StorageStrategy storageStrategy;
 
 
   @PostMapping("create")
-  public Chatroom create(@RequestBody String name)
+  public ChatroomTo create(@RequestBody String name)
   {
-    return chatHome.createChatroom(name);
+    return ChatroomTo.from(chatHome.createChatroom(name));
   }
 
   @GetMapping("list")
-  public Collection<Chatroom> list()
+  public Stream<ChatroomTo> list()
   {
-    return chatHome.list();
+    return chatHome.list().map(chatroom -> ChatroomTo.from(chatroom));
   }
 
   @GetMapping("get/{chatroomId}")
-  public Chatroom get(@PathVariable UUID chatroomId)
+  public Optional<ChatroomTo> get(@PathVariable UUID chatroomId)
   {
-    return chatHome.getChatroom(chatroomId);
+    return chatHome.getChatroom(chatroomId).map(chatroom -> ChatroomTo.from(chatroom));
   }
 
   @PutMapping("put/{chatroomId}/{username}/{messageId}")
@@ -47,7 +50,19 @@ public class ChatBackendController
       @PathVariable Long messageId,
       @RequestBody String text)
   {
-    Chatroom chatroom = chatHome.getChatroom(chatroomId);
+    return
+        chatHome
+            .getChatroom(chatroomId)
+            .map(chatroom -> put(chatroom, username, messageId, text))
+            .orElseThrow(() -> new UnknownChatroomException(chatroomId));
+  }
+
+  public Mono<MessageTo> put(
+      Chatroom chatroom,
+      String username,
+      Long messageId,
+      String text)
+  {
     return
         chatroom
             .addMessage(
@@ -68,6 +83,17 @@ public class ChatBackendController
     return
         chatHome
             .getChatroom(chatroomId)
+            .map(chatroom -> get(chatroom, username, messageId))
+            .orElseThrow(() -> new UnknownChatroomException(chatroomId));
+  }
+
+  private Mono<MessageTo> get(
+      Chatroom chatroom,
+      String username,
+      Long messageId)
+  {
+    return
+        chatroom
             .getMessage(username, messageId)
             .map(message -> MessageTo.from(message));
   }
@@ -79,8 +105,21 @@ public class ChatBackendController
   {
     return chatHome
         .getChatroom(chatroomId)
+        .map(chatroom -> listen(chatroom))
+        .orElseThrow(() -> new UnknownChatroomException(chatroomId));
+  }
+
+  private Flux<MessageTo> listen(Chatroom chatroom)
+  {
+    return chatroom
         .listen()
         .log()
         .map(message -> MessageTo.from(message));
   }
+
+  @PostMapping("/store")
+  public void store()
+  {
+    storageStrategy.writeChatrooms(Flux.fromStream(chatHome.list()));
+  }
 }