X-Git-Url: http://juplo.de/gitweb/?a=blobdiff_plain;f=src%2Fmain%2Fjava%2Fde%2Fjuplo%2Fkafka%2Fchat%2Fbackend%2Fapi%2FChatBackendController.java;h=cc6958fea54d31dfe1c83cca81cd7bf20a7890c8;hb=22c15a299f38649686d2677731aeb349e51224a5;hp=b8024e63436375699df03bf0507c42ec2df36669;hpb=0eab1a667e8863acfe318f520d9f0bca7fba2e2b;p=demos%2Fkafka%2Fchat

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 b8024e63..cc6958fe 100644
--- a/src/main/java/de/juplo/kafka/chat/backend/api/ChatBackendController.java
+++ b/src/main/java/de/juplo/kafka/chat/backend/api/ChatBackendController.java
@@ -1,48 +1,54 @@
 package de.juplo.kafka.chat.backend.api;
 
-import de.juplo.kafka.chat.backend.domain.Chatroom;
-import de.juplo.kafka.chat.backend.domain.ChatroomFactory;
+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.http.codec.ServerSentEvent;
 import org.springframework.web.bind.annotation.*;
 import reactor.core.publisher.Flux;
 import reactor.core.publisher.Mono;
 
-import java.time.Clock;
-import java.time.LocalDateTime;
-import java.util.Collection;
-import java.util.HashMap;
-import java.util.Map;
+import java.util.Optional;
 import java.util.UUID;
+import java.util.stream.Stream;
 
 
 @RestController
 @RequiredArgsConstructor
 public class ChatBackendController
 {
-  private final Map<UUID, Chatroom> chatrooms = new HashMap<>();
-  private final ChatroomFactory factory;
-  private final Clock clock;
+  private final ChatHome chatHome;
+  private final StorageStrategy storageStrategy;
 
 
   @PostMapping("create")
-  public Chatroom create(@RequestBody String name)
+  public ChatRoomTo create(@RequestBody String name)
   {
-    Chatroom chatroom = factory.createChatroom(UUID.randomUUID(), name);
-    chatrooms.put(chatroom.getId(), chatroom);
-    return chatroom;
+    return ChatRoomTo.from(chatHome.createChatroom(name));
   }
 
   @GetMapping("list")
-  public Collection<Chatroom> list()
+  public Stream<ChatRoomTo> list()
   {
-    return chatrooms.values();
+    return chatHome.list().map(chatroom -> ChatRoomTo.from(chatroom));
+  }
+
+  @GetMapping("list/{chatroomId}")
+  public Flux<MessageTo> list(@PathVariable UUID chatroomId)
+  {
+    return chatHome
+        .getChatroom(chatroomId)
+        .map(chatroom -> chatroom
+            .getMessages()
+            .map(MessageTo::from))
+        .get();
   }
 
   @GetMapping("get/{chatroomId}")
-  public Chatroom get(@PathVariable UUID chatroomId)
+  public Optional<ChatRoomTo> get(@PathVariable UUID chatroomId)
   {
-    return chatrooms.get(chatroomId);
+    return chatHome.getChatroom(chatroomId).map(chatroom -> ChatRoomTo.from(chatroom));
   }
 
   @PutMapping("put/{chatroomId}/{username}/{messageId}")
@@ -52,12 +58,23 @@ public class ChatBackendController
       @PathVariable Long messageId,
       @RequestBody String text)
   {
-    Chatroom chatroom = chatrooms.get(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(
                 messageId,
-                LocalDateTime.now(clock),
                 username,
                 text)
             .switchIfEmpty(chatroom.getMessage(username, messageId))
@@ -71,21 +88,49 @@ public class ChatBackendController
       @PathVariable Long messageId)
   {
     return
-        chatrooms
-            .get(chatroomId)
+        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));
   }
 
-  @GetMapping(
-      path = "listen/{chatroomId}",
-      produces = MediaType.TEXT_EVENT_STREAM_VALUE)
-  public Flux<MessageTo> listen(@PathVariable UUID chatroomId)
+  @GetMapping(path = "listen/{chatroomId}")
+  public Flux<ServerSentEvent<MessageTo>> listen(@PathVariable UUID chatroomId)
   {
-    return chatrooms
-        .get(chatroomId)
+    return chatHome
+        .getChatroom(chatroomId)
+        .map(chatroom -> listen(chatroom))
+        .orElseThrow(() -> new UnknownChatroomException(chatroomId));
+  }
+
+  private Flux<ServerSentEvent<MessageTo>> listen(ChatRoom chatroom)
+  {
+    return chatroom
         .listen()
         .log()
-        .map(message -> MessageTo.from(message));
+        .map(message -> MessageTo.from(message))
+        .map(messageTo ->
+            ServerSentEvent
+                .builder(messageTo)
+                .id(messageTo.getSerial().toString())
+                .event("message")
+                .build());
+  }
+
+  @PostMapping("/store")
+  public void store()
+  {
+    storageStrategy.writeChatrooms(Flux.fromStream(chatHome.list()));
   }
 }