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.getTopic(),
29 Clock.systemDefaultZone(),
30 properties.getCommitInterval(),
35 public WordcountRebalanceListener wordcountRebalanceListener(
36 WordcountRecordHandler wordcountRecordHandler,
37 PartitionStatisticsRepository repository,
38 Consumer<String, String> consumer,
39 ApplicationProperties properties)
41 return new WordcountRebalanceListener(
42 wordcountRecordHandler,
44 properties.getClientId(),
49 public EndlessConsumer<String, String> endlessConsumer(
50 KafkaConsumer<String, String> kafkaConsumer,
51 ExecutorService executor,
52 WordcountRebalanceListener wordcountRebalanceListener,
53 WordcountRecordHandler wordcountRecordHandler,
54 ApplicationProperties properties)
57 new EndlessConsumer<>(
59 properties.getClientId(),
60 properties.getTopic(),
62 wordcountRebalanceListener,
63 wordcountRecordHandler);
67 public ExecutorService executor()
69 return Executors.newSingleThreadExecutor();
72 @Bean(destroyMethod = "close")
73 public KafkaConsumer<String, String> kafkaConsumer(ApplicationProperties properties)
75 Properties props = new Properties();
77 props.put("bootstrap.servers", properties.getBootstrapServer());
78 props.put("partition.assignment.strategy", "org.apache.kafka.clients.consumer.CooperativeStickyAssignor");
79 props.put("group.id", properties.getGroupId());
80 props.put("client.id", properties.getClientId());
81 props.put("enable.auto.commit", false);
82 props.put("auto.offset.reset", properties.getAutoOffsetReset());
83 props.put("metadata.max.age.ms", "1000");
84 props.put("key.deserializer", StringDeserializer.class.getName());
85 props.put("value.deserializer", StringDeserializer.class.getName());
87 return new KafkaConsumer<>(props);