From: Kai Moritz <kai@juplo.de>
Date: Wed, 28 Dec 2022 16:20:53 +0000 (+0100)
Subject: feat: `Chatroom.getMessages()` is fully paginated (takes first and last)
X-Git-Tag: wip~95
X-Git-Url: http://juplo.de/gitweb/?a=commitdiff_plain;h=93f9e5cea5fb73d35d6df60518533cdd7cc9d12d;p=demos%2Fkafka%2Fchat

feat: `Chatroom.getMessages()` is fully paginated (takes first and last)
---

diff --git a/src/main/java/de/juplo/kafka/chat/backend/domain/Chatroom.java b/src/main/java/de/juplo/kafka/chat/backend/domain/Chatroom.java
index 62c97327..115dcd69 100644
--- a/src/main/java/de/juplo/kafka/chat/backend/domain/Chatroom.java
+++ b/src/main/java/de/juplo/kafka/chat/backend/domain/Chatroom.java
@@ -72,12 +72,16 @@ public class Chatroom
     return sink.asFlux();
   }
 
-  public Stream<Message> getMessages(long firstMessage)
+  public Stream<Message> getMessages(long first, long last)
   {
     return messages
         .values()
         .stream()
-        .filter(message -> message.getSerialNumber() >= firstMessage);
+        .filter(message ->
+        {
+          long serial = message.getSerialNumber();
+          return serial >= first && serial <= last;
+        });
   }