From 41e66f90dfa9a06480243064f79f5c85ec0493b6 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 6ff9155d..c7aa95f5 100644
--- a/src/main/java/de/juplo/kafka/ApplicationConfiguration.java
+++ b/src/main/java/de/juplo/kafka/ApplicationConfiguration.java
@@ -4,7 +4,6 @@ import de.juplo.messages.Message;
import org.apache.kafka.clients.consumer.Consumer;
import org.apache.kafka.clients.consumer.KafkaConsumer;
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;
@@ -19,7 +18,7 @@ public class ApplicationConfiguration
{
@Bean
public ExampleConsumer exampleConsumer(
- Consumer<String, Message> kafkaConsumer,
+ Consumer<String, String> kafkaConsumer,
ApplicationProperties properties,
ConfigurableApplicationContext applicationContext)
{
@@ -32,7 +31,7 @@ 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());
@@ -48,7 +47,7 @@ public class ApplicationConfiguration
}
props.put("metadata.max.age.ms", 5000); // 5 Sekunden
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 d4109fc2..9d973b61 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;
@@ -28,7 +28,7 @@ public class ExampleConsumer implements Runnable
public ExampleConsumer(
String clientId,
String topic,
- Consumer<String, Message> consumer,
+ Consumer<String, String> consumer,
Runnable closeCallback)
{
this.id = clientId;
@@ -52,10 +52,10 @@ public class ExampleConsumer implements Runnable
while (true)
{
- ConsumerRecords<String, Message> records = consumer.poll(Duration.ofSeconds(1));
+ 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(),
@@ -90,16 +90,16 @@ 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