From 629f04d7a6d252bae7d2d8fd7e25c86ba14c0e2a Mon Sep 17 00:00:00 2001
From: Kai Moritz <kai@juplo.de>
Date: Fri, 1 Dec 2023 17:37:51 +0100
Subject: [PATCH] Der Consumer kann mit mehreren Topics konfiguriert werden

---
 README.sh                                                  | 2 +-
 docker/docker-compose.yml                                  | 1 +
 pom.xml                                                    | 2 +-
 src/main/java/de/juplo/kafka/ApplicationConfiguration.java | 2 +-
 src/main/java/de/juplo/kafka/ApplicationProperties.java    | 2 +-
 src/main/java/de/juplo/kafka/SimpleConsumer.java           | 6 +++---
 src/main/resources/application.yml                         | 2 +-
 7 files changed, 9 insertions(+), 8 deletions(-)

diff --git a/README.sh b/README.sh
index b32d9f5..5e265f9 100755
--- a/README.sh
+++ b/README.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-IMAGE=juplo/spring-consumer:1.0-SNAPSHOT
+IMAGE=juplo/spring-consumer:1.1-SNAPSHOT
 
 if [ "$1" = "cleanup" ]
 then
diff --git a/docker/docker-compose.yml b/docker/docker-compose.yml
index 715dd8e..e4191ec 100644
--- a/docker/docker-compose.yml
+++ b/docker/docker-compose.yml
@@ -218,6 +218,7 @@ services:
   consumer:
     image: juplo/spring-consumer:1.0-SNAPSHOT
     environment:
+      simple.consumer.topics: test
       spring.kafka.bootstrap-servers: kafka:9092
       spring.kafka.client-id: consumer
 
diff --git a/pom.xml b/pom.xml
index d5a28ea..f688913 100644
--- a/pom.xml
+++ b/pom.xml
@@ -15,7 +15,7 @@
   <artifactId>spring-consumer</artifactId>
   <name>Spring Consumer</name>
   <description>Super Simple Consumer-Group, that is implemented as Spring-Boot application and configured by Spring Kafka</description>
-  <version>1.0-SNAPSHOT</version>
+  <version>1.1-SNAPSHOT</version>
 
   <properties>
     <java.version>17</java.version>
diff --git a/src/main/java/de/juplo/kafka/ApplicationConfiguration.java b/src/main/java/de/juplo/kafka/ApplicationConfiguration.java
index 62d61a2..9a237b7 100644
--- a/src/main/java/de/juplo/kafka/ApplicationConfiguration.java
+++ b/src/main/java/de/juplo/kafka/ApplicationConfiguration.java
@@ -22,7 +22,7 @@ public class ApplicationConfiguration
     return
         new SimpleConsumer(
             kafkaProperties.getClientId(),
-            applicationProperties.getTopic(),
+            applicationProperties.getTopics(),
             kafkaConsumer);
   }
 
diff --git a/src/main/java/de/juplo/kafka/ApplicationProperties.java b/src/main/java/de/juplo/kafka/ApplicationProperties.java
index a4cc8b8..4092fa2 100644
--- a/src/main/java/de/juplo/kafka/ApplicationProperties.java
+++ b/src/main/java/de/juplo/kafka/ApplicationProperties.java
@@ -17,5 +17,5 @@ public class ApplicationProperties
 {
   @NotNull
   @NotEmpty
-  private String topic;
+  private String[] topics;
 }
diff --git a/src/main/java/de/juplo/kafka/SimpleConsumer.java b/src/main/java/de/juplo/kafka/SimpleConsumer.java
index aadc11f..a76132b 100644
--- a/src/main/java/de/juplo/kafka/SimpleConsumer.java
+++ b/src/main/java/de/juplo/kafka/SimpleConsumer.java
@@ -17,7 +17,7 @@ import java.util.concurrent.Callable;
 public class SimpleConsumer implements Callable<Integer>
 {
   private final String id;
-  private final String topic;
+  private final String[] topics;
   private final Consumer<String, String> consumer;
 
   private long consumed = 0;
@@ -28,8 +28,8 @@ public class SimpleConsumer implements Callable<Integer>
   {
     try
     {
-      log.info("{} - Subscribing to topic {}", id, topic);
-      consumer.subscribe(Arrays.asList(topic));
+      log.info("{} - Subscribing to topics: {}", id, topics);
+      consumer.subscribe(Arrays.asList(topics));
 
       while (true)
       {
diff --git a/src/main/resources/application.yml b/src/main/resources/application.yml
index b7fedad..5143336 100644
--- a/src/main/resources/application.yml
+++ b/src/main/resources/application.yml
@@ -1,6 +1,6 @@
 simple:
   consumer:
-    topic: test
+    topics: test
 management:
   endpoint:
     shutdown:
-- 
2.20.1