From df6ca288a881f12bd457a7d0bc1928ee1a4e91da Mon Sep 17 00:00:00 2001
From: Kai Moritz <kai@juplo.de>
Date: Tue, 29 Oct 2024 16:14:31 +0100
Subject: [PATCH] Vorlage

---
 README.sh                                     | 39 -------------------
 .../java/de/juplo/kafka/ExampleConsumer.java  | 34 ++--------------
 2 files changed, 4 insertions(+), 69 deletions(-)
 delete mode 100755 README.sh

diff --git a/README.sh b/README.sh
deleted file mode 100755
index 85b8f960..00000000
--- a/README.sh
+++ /dev/null
@@ -1,39 +0,0 @@
-#!/bin/bash
-
-IMAGE=juplo/simple-consumer:1.0-SNAPSHOT
-
-if [ "$1" = "cleanup" ]
-then
-  docker compose -f docker/docker-compose.yml down -t0 -v --remove-orphans
-  mvn clean
-  exit
-fi
-
-docker compose -f docker/docker-compose.yml up -d --remove-orphans kafka-1 kafka-2 kafka-3
-docker compose -f docker/docker-compose.yml rm -svf consumer
-
-if [[
-  $(docker image ls -q $IMAGE) == "" ||
-  "$1" = "build"
-]]
-then
-  mvn clean install || exit
-else
-  echo "Using image existing images:"
-  docker image ls $IMAGE
-fi
-
-docker compose -f docker/docker-compose.yml up --remove-orphans setup || exit 1
-
-
-docker compose -f docker/docker-compose.yml up -d producer
-docker compose -f docker/docker-compose.yml up -d consumer
-
-sleep 5
-docker compose -f docker/docker-compose.yml stop consumer
-
-docker compose -f docker/docker-compose.yml start consumer
-sleep 5
-
-docker compose -f docker/docker-compose.yml stop producer consumer
-docker compose -f docker/docker-compose.yml logs consumer
diff --git a/src/main/java/de/juplo/kafka/ExampleConsumer.java b/src/main/java/de/juplo/kafka/ExampleConsumer.java
index 891af891..15d72ad7 100644
--- a/src/main/java/de/juplo/kafka/ExampleConsumer.java
+++ b/src/main/java/de/juplo/kafka/ExampleConsumer.java
@@ -30,11 +30,7 @@ public class ExampleConsumer
     String clientId)
   {
     Properties props = new Properties();
-    props.put("bootstrap.servers", broker);
-    props.put("group.id", groupId); // ID für die Offset-Commits
-    props.put("client.id", clientId); // Nur zur Wiedererkennung
-    props.put("key.deserializer", StringDeserializer.class.getName());
-    props.put("value.deserializer", StringDeserializer.class.getName());
+    // Konfiguration für den Consumer zusammenstellen
 
     this.id = clientId;
     this.topic = topic;
@@ -47,23 +43,13 @@ public class ExampleConsumer
     try
     {
       log.info("{} - Subscribing to topic {}", id, topic);
-      consumer.subscribe(Arrays.asList(topic));
+      // TODO: subscribe!
       running = true;
 
       while (true)
       {
-        ConsumerRecords<String, String> records = consumer.poll(Duration.ofSeconds(1));
-
-        log.info("{} - Received {} messages", id, records.count());
-        for (ConsumerRecord<String, String> record : records)
-        {
-          handleRecord(
-            record.topic(),
-            record.partition(),
-            record.offset(),
-            record.key(),
-            record.value());
-        }
+        // TODO:
+        // Über consumer.poll() Nachrichten abrufen und loggen
       }
     }
     catch(WakeupException e)
@@ -73,7 +59,6 @@ public class ExampleConsumer
     catch(Exception e)
     {
       log.error("{} - Unexpected error, unsubscribing!", id, e);
-      consumer.unsubscribe();
     }
     finally
     {
@@ -84,17 +69,6 @@ public class ExampleConsumer
     }
   }
 
-  private void handleRecord(
-    String topic,
-    Integer partition,
-    Long offset,
-    String key,
-    String value)
-  {
-    consumed++;
-    log.info("{} - partition={}-{}, offset={}: {}={}", id, topic, partition, offset, key, value);
-  }
-
 
   public static void main(String[] args) throws Exception
   {
-- 
2.20.1