From 6d6877ff078d4fa9d4709f8ff497488abded231b Mon Sep 17 00:00:00 2001
From: Kai Moritz <kai@juplo.de>
Date: Wed, 17 Aug 2022 18:43:43 +0200
Subject: [PATCH] Parameter `partition` wiederbelebt

* Wenn der Parameter gesetzt ist, schreibt das Gateway alle Nachrichten
  in die vorgegebene Partition.
* Wenn der Parameter null ist, wird die Default-Partitionierung
  (Hashing by Key) verwendet.
---
 src/main/java/de/juplo/kafka/ApplicationConfiguration.java | 1 +
 src/main/java/de/juplo/kafka/ApplicationProperties.java    | 1 +
 src/main/java/de/juplo/kafka/RestGateway.java              | 2 ++
 3 files changed, 4 insertions(+)

diff --git a/src/main/java/de/juplo/kafka/ApplicationConfiguration.java b/src/main/java/de/juplo/kafka/ApplicationConfiguration.java
index 33dabc9..d9c7661 100644
--- a/src/main/java/de/juplo/kafka/ApplicationConfiguration.java
+++ b/src/main/java/de/juplo/kafka/ApplicationConfiguration.java
@@ -23,6 +23,7 @@ public class ApplicationConfiguration
         new RestGateway(
             properties.getClientId(),
             properties.getTopic(),
+            properties.getPartition(),
             kafkaProducer);
   }
 
diff --git a/src/main/java/de/juplo/kafka/ApplicationProperties.java b/src/main/java/de/juplo/kafka/ApplicationProperties.java
index a18b20f..2bcbb7a 100644
--- a/src/main/java/de/juplo/kafka/ApplicationProperties.java
+++ b/src/main/java/de/juplo/kafka/ApplicationProperties.java
@@ -22,6 +22,7 @@ public class ApplicationProperties
   @NotNull
   @NotEmpty
   private String topic;
+  private Integer partition;
   @NotNull
   @NotEmpty
   private String acks;
diff --git a/src/main/java/de/juplo/kafka/RestGateway.java b/src/main/java/de/juplo/kafka/RestGateway.java
index 4549b8f..c50f465 100644
--- a/src/main/java/de/juplo/kafka/RestGateway.java
+++ b/src/main/java/de/juplo/kafka/RestGateway.java
@@ -17,6 +17,7 @@ public class RestGateway
 {
   private final String id;
   private final String topic;
+  private final Integer partition;
   private final KafkaProducer<String, Integer> producer;
 
   private long produced = 0;
@@ -33,6 +34,7 @@ public class RestGateway
 
     final ProducerRecord<String, Integer> record = new ProducerRecord<>(
         topic,  // Topic
+        partition, // Partition - Uses default-algorithm, if null
         key,    // Key
         value   // Value
     );
-- 
2.20.1