From: Kai Moritz <kai@juplo.de>
Date: Sat, 9 Nov 2024 17:00:32 +0000 (+0100)
Subject: Vorlage für die Rebalance-Übung
X-Git-Tag: consumer/spring-consumer--rebalance-listener--vorlage--2024-11-13--si
X-Git-Url: http://juplo.de/gitweb/?a=commitdiff_plain;h=6c23b556b03d674344d1063d3fd2746d2d6f80d5;p=demos%2Fkafka%2Ftraining

Vorlage für die Rebalance-Übung
---

diff --git a/README.sh b/README.sh
deleted file mode 100755
index bdefd2b..0000000
--- a/README.sh
+++ /dev/null
@@ -1,39 +0,0 @@
-#!/bin/bash
-
-IMAGE=juplo/spring-consumer:1.1-rebalance-listener-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-1 consumer-2
-
-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-1
-sleep 10
-docker compose -f docker/docker-compose.yml exec cli http -v consumer-1:8881/
-
-docker compose -f docker/docker-compose.yml up -d consumer-2
-sleep 10
-docker compose -f docker/docker-compose.yml exec cli http -v consumer-1:8881/
-docker compose -f docker/docker-compose.yml exec cli http -v consumer-2:8881/
-
-docker compose -f docker/docker-compose.yml stop producer consumer-1
diff --git a/src/main/java/de/juplo/kafka/ExampleConsumer.java b/src/main/java/de/juplo/kafka/ExampleConsumer.java
index 53abd4d..7cdf210 100644
--- a/src/main/java/de/juplo/kafka/ExampleConsumer.java
+++ b/src/main/java/de/juplo/kafka/ExampleConsumer.java
@@ -2,7 +2,6 @@ package de.juplo.kafka;
 
 import lombok.extern.slf4j.Slf4j;
 import org.apache.kafka.clients.consumer.Consumer;
-import org.apache.kafka.clients.consumer.ConsumerRebalanceListener;
 import org.apache.kafka.clients.consumer.ConsumerRecord;
 import org.apache.kafka.clients.consumer.ConsumerRecords;
 import org.apache.kafka.common.TopicPartition;
@@ -13,7 +12,7 @@ import java.util.*;
 
 
 @Slf4j
-public class ExampleConsumer implements Runnable, ConsumerRebalanceListener
+public class ExampleConsumer implements Runnable
 {
   private final String id;
   private final String topic;
@@ -55,7 +54,7 @@ public class ExampleConsumer implements Runnable, ConsumerRebalanceListener
       counterState = new CounterState[numPartitions];
 
       log.info("{} - Subscribing to topic {}", id, topic);
-      consumer.subscribe(Arrays.asList(topic), this);
+      consumer.subscribe(Arrays.asList(topic));
       running = true;
 
       while (running)
@@ -121,33 +120,6 @@ public class ExampleConsumer implements Runnable, ConsumerRebalanceListener
   }
 
 
-  @Override
-  public void onPartitionsAssigned(Collection<TopicPartition> partitions)
-  {
-    partitions
-      .stream()
-      .filter(partition -> partition.topic().equals(topic))
-      .forEach(partition ->
-      {
-        assignedPartitions.add(partition);
-        counterState[partition.partition()] = new CounterState(new HashMap<>());
-      });
-  }
-
-  @Override
-  public synchronized void onPartitionsRevoked(Collection<TopicPartition> partitions)
-  {
-    partitions
-      .stream()
-      .filter(partition -> partition.topic().equals(topic))
-      .forEach(partition ->
-      {
-        assignedPartitions.remove(partition);
-        counterState[partition.partition()] = null;
-      });
-  }
-
-
   public void shutdown() throws InterruptedException
   {
     log.info("{} joining the worker-thread...", id);