From efb2db47144463c945af3c0b7264e6c726b1ffe9 Mon Sep 17 00:00:00 2001
From: Kai Moritz <kai@juplo.de>
Date: Sun, 2 Feb 2025 18:49:06 +0100
Subject: [PATCH] =?utf8?q?Vorlage=20f=C3=BCr=20das=20Empfangen=20von=20Nac?=
=?utf8?q?hrichten=20aus=20einer=20geteilten=20Lib?=
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---
.../juplo/kafka/ApplicationConfiguration.java | 7 +++---
.../java/de/juplo/kafka/ExampleConsumer.java | 22 +++++++++----------
2 files changed, 14 insertions(+), 15 deletions(-)
diff --git a/src/main/java/de/juplo/kafka/ApplicationConfiguration.java b/src/main/java/de/juplo/kafka/ApplicationConfiguration.java
index f114fed4..e0061720 100644
--- a/src/main/java/de/juplo/kafka/ApplicationConfiguration.java
+++ b/src/main/java/de/juplo/kafka/ApplicationConfiguration.java
@@ -5,7 +5,6 @@ import org.apache.kafka.clients.consumer.Consumer;
import org.apache.kafka.clients.consumer.KafkaConsumer;
import org.apache.kafka.clients.consumer.StickyAssignor;
import org.apache.kafka.common.serialization.StringDeserializer;
-import org.springframework.kafka.support.serializer.JsonDeserializer;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.annotation.Bean;
@@ -20,7 +19,7 @@ public class ApplicationConfiguration
{
@Bean
public ExampleConsumer exampleConsumer(
- Consumer<String, Message> kafkaConsumer,
+ Consumer<String, String> kafkaConsumer,
ApplicationProperties properties,
ConfigurableApplicationContext applicationContext)
{
@@ -33,7 +32,7 @@ public class ApplicationConfiguration
}
@Bean(destroyMethod = "")
- public KafkaConsumer<String, Message> kafkaConsumer(ApplicationProperties properties)
+ public KafkaConsumer<String, String> kafkaConsumer(ApplicationProperties properties)
{
Properties props = new Properties();
props.put("bootstrap.servers", properties.getBootstrapServer());
@@ -50,7 +49,7 @@ public class ApplicationConfiguration
props.put("metadata.maxage.ms", 5000); // 5 Sekunden
props.put("partition.assignment.strategy", StickyAssignor.class.getName());
props.put("key.deserializer", StringDeserializer.class.getName());
- props.put("value.deserializer", JsonDeserializer.class.getName());
+ props.put("value.deserializer", StringDeserializer.class.getName());
props.put("spring.json.trusted.packages", "de.juplo.messages");
return new KafkaConsumer<>(props);
diff --git a/src/main/java/de/juplo/kafka/ExampleConsumer.java b/src/main/java/de/juplo/kafka/ExampleConsumer.java
index 93051900..031e9d74 100644
--- a/src/main/java/de/juplo/kafka/ExampleConsumer.java
+++ b/src/main/java/de/juplo/kafka/ExampleConsumer.java
@@ -18,7 +18,7 @@ public class ExampleConsumer implements Runnable
{
private final String id;
private final String topic;
- private final Consumer<String, Message> consumer;
+ private final Consumer<String, String> consumer;
private final Thread workerThread;
private final Runnable closeCallback;
@@ -29,7 +29,7 @@ public class ExampleConsumer implements Runnable
public ExampleConsumer(
String clientId,
String topic,
- Consumer<String, Message> consumer,
+ Consumer<String, String> consumer,
Runnable closeCallback)
{
this.id = clientId;
@@ -54,11 +54,11 @@ public class ExampleConsumer implements Runnable
while (running)
{
- ConsumerRecords<String, Message> records =
+ ConsumerRecords<String, String> records =
consumer.poll(Duration.ofSeconds(1));
log.info("{} - Received {} messages", id, records.count());
- for (ConsumerRecord<String, Message> record : records)
+ for (ConsumerRecord<String, String> record : records)
{
handleRecord(
record.topic(),
@@ -93,16 +93,16 @@ public class ExampleConsumer implements Runnable
Integer partition,
Long offset,
String key,
- Message value)
+ String value)
{
consumed++;
log.info("{} - partition={}-{}, offset={}: {}={}", id, topic, partition, offset, key, value);
- switch (value.getType())
- {
- case ADD -> addNumber((Add)value);
- case CALC -> calcSum((Calculate)value);
- default -> log.error("{} - Ignoring message of unknown typ {}", id, value.getType());
- }
+ // switch (value.getType())
+ // {
+ // case ADD -> addNumber((Add)value);
+ // case CALC -> calcSum((Calculate)value);
+ // default -> log.error("{} - Ignoring message of unknown typ {}", id, value.getType());
+ // }
}
private void addNumber(Add add)
--
2.20.1