1 package de.juplo.kafka;
3 import org.apache.kafka.clients.consumer.ConsumerRecord;
4 import org.apache.kafka.clients.consumer.KafkaConsumer;
5 import org.apache.kafka.common.serialization.LongDeserializer;
6 import org.apache.kafka.common.serialization.StringDeserializer;
7 import org.springframework.boot.context.properties.EnableConfigurationProperties;
8 import org.springframework.context.annotation.Bean;
9 import org.springframework.context.annotation.Configuration;
10 import org.springframework.kafka.support.serializer.JsonDeserializer;
12 import java.util.Properties;
13 import java.util.concurrent.ExecutorService;
14 import java.util.concurrent.Executors;
15 import java.util.function.Consumer;
19 @EnableConfigurationProperties(ApplicationProperties.class)
20 public class ApplicationConfiguration
23 public Consumer<ConsumerRecord<String, ClientMessage>> consumer()
32 public EndlessConsumer<String, ClientMessage> endlessConsumer(
33 KafkaConsumer<String, ClientMessage> kafkaConsumer,
34 ExecutorService executor,
35 Consumer<ConsumerRecord<String, ClientMessage>> handler,
36 ApplicationProperties properties)
39 new EndlessConsumer<>(
41 properties.getClientId(),
42 properties.getTopic(),
48 public ExecutorService executor()
50 return Executors.newSingleThreadExecutor();
53 @Bean(destroyMethod = "close")
54 public KafkaConsumer<String, ClientMessage> kafkaConsumer(ApplicationProperties properties)
56 Properties props = new Properties();
58 props.put("bootstrap.servers", properties.getBootstrapServer());
59 props.put("group.id", properties.getGroupId());
60 props.put("client.id", properties.getClientId());
61 props.put("auto.offset.reset", properties.getAutoOffsetReset());
62 props.put("metadata.max.age.ms", "1000");
63 props.put("key.deserializer", StringDeserializer.class.getName());
64 props.put("value.deserializer", JsonDeserializer.class.getName());
65 props.put(JsonDeserializer.TYPE_MAPPINGS, "message:" + ClientMessage.class.getName());
66 props.put(JsonDeserializer.TRUSTED_PACKAGES, "de.juplo.kafka");
68 return new KafkaConsumer<>(props);