1 package de.juplo.kafka;
3 import org.apache.kafka.clients.consumer.Consumer;
4 import org.apache.kafka.clients.consumer.KafkaConsumer;
5 import org.apache.kafka.common.serialization.StringDeserializer;
6 import org.springframework.boot.context.properties.EnableConfigurationProperties;
7 import org.springframework.context.annotation.Bean;
8 import org.springframework.context.annotation.Configuration;
10 import java.time.Clock;
11 import java.util.Properties;
12 import java.util.concurrent.ExecutorService;
13 import java.util.concurrent.Executors;
17 @EnableConfigurationProperties(ApplicationProperties.class)
18 public class ApplicationConfiguration
21 public WordcountRecordHandler wordcountRecordHandler(
22 PartitionStatisticsRepository repository,
23 Consumer<String, String> consumer,
24 ApplicationProperties properties)
26 return new WordcountRecordHandler(
28 properties.getClientId(),
29 properties.getTopic(),
30 Clock.systemDefaultZone(),
31 properties.getCommitInterval(),
36 public WordcountRebalanceListener wordcountRebalanceListener(
37 WordcountRecordHandler wordcountRecordHandler)
39 return new WordcountRebalanceListener(wordcountRecordHandler);
43 public EndlessConsumer<String, String> endlessConsumer(
44 KafkaConsumer<String, String> kafkaConsumer,
45 ExecutorService executor,
46 WordcountRebalanceListener wordcountRebalanceListener,
47 WordcountRecordHandler wordcountRecordHandler,
48 ApplicationProperties properties)
51 new EndlessConsumer<>(
53 properties.getClientId(),
54 properties.getTopic(),
56 wordcountRebalanceListener,
57 wordcountRecordHandler);
61 public ExecutorService executor()
63 return Executors.newSingleThreadExecutor();
66 @Bean(destroyMethod = "close")
67 public KafkaConsumer<String, String> kafkaConsumer(ApplicationProperties properties)
69 Properties props = new Properties();
71 props.put("bootstrap.servers", properties.getBootstrapServer());
72 props.put("partition.assignment.strategy", "org.apache.kafka.clients.consumer.CooperativeStickyAssignor");
73 props.put("group.id", properties.getGroupId());
74 props.put("client.id", properties.getClientId());
75 props.put("enable.auto.commit", false);
76 props.put("auto.offset.reset", properties.getAutoOffsetReset());
77 props.put("metadata.max.age.ms", "1000");
78 props.put("key.deserializer", StringDeserializer.class.getName());
79 props.put("value.deserializer", StringDeserializer.class.getName());
81 return new KafkaConsumer<>(props);