1 package de.juplo.kafka.wordcount.counter;
3 import com.fasterxml.jackson.core.JsonProcessingException;
4 import com.fasterxml.jackson.databind.ObjectMapper;
5 import lombok.RequiredArgsConstructor;
7 import lombok.extern.slf4j.Slf4j;
8 import org.apache.kafka.clients.consumer.ConsumerRecord;
9 import org.junit.jupiter.api.BeforeEach;
10 import org.junit.jupiter.api.Test;
11 import org.springframework.beans.factory.annotation.Autowired;
12 import org.springframework.boot.test.context.SpringBootTest;
13 import org.springframework.boot.test.context.TestConfiguration;
14 import org.springframework.context.annotation.Bean;
15 import org.springframework.kafka.annotation.KafkaListener;
16 import org.springframework.kafka.core.KafkaTemplate;
17 import org.springframework.kafka.test.context.EmbeddedKafka;
18 import org.springframework.util.LinkedMultiValueMap;
19 import org.springframework.util.MultiValueMap;
21 import java.time.Duration;
23 import static de.juplo.kafka.wordcount.counter.CounterApplicationIT.*;
24 import static org.assertj.core.api.Assertions.assertThat;
25 import static org.awaitility.Awaitility.*;
30 "spring.kafka.bootstrap-servers=${spring.embedded.kafka.brokers}",
31 "juplo.wordcount.counter.bootstrap-server=${spring.embedded.kafka.brokers}",
32 "juplo.wordcount.counter.commit-interval=0",
33 "juplo.wordcount.counter.cacheMaxBytes=0",
34 "juplo.wordcount.counter.input-topic=" + TOPIC_IN,
35 "juplo.wordcount.counter.output-topic=" + TOPIC_OUT })
36 @EmbeddedKafka(topics = { TOPIC_IN, TOPIC_OUT }, partitions = PARTITIONS)
38 public class CounterApplicationIT
40 public final static String TOPIC_IN = "in";
41 public final static String TOPIC_OUT = "out";
42 static final int PARTITIONS = 2;
45 KafkaTemplate<String, String> kafkaTemplate;
55 consumer.received.clear();
60 void testSendMessage() throws Exception
62 kafkaTemplate.send(TOPIC_IN, "peter", "Hallo");
63 kafkaTemplate.send(TOPIC_IN, "klaus", "Müsch");
64 kafkaTemplate.send(TOPIC_IN, "peter", "Welt");
65 kafkaTemplate.send(TOPIC_IN, "klaus", "Müsch");
66 kafkaTemplate.send(TOPIC_IN, "klaus", "s");
67 kafkaTemplate.send(TOPIC_IN, "peter", "Boäh");
68 kafkaTemplate.send(TOPIC_IN, "peter", "Welt");
69 kafkaTemplate.send(TOPIC_IN, "peter", "Boäh");
70 kafkaTemplate.send(TOPIC_IN, "klaus", "s");
71 kafkaTemplate.send(TOPIC_IN, "peter", "Boäh");
72 kafkaTemplate.send(TOPIC_IN, "klaus", "s");
74 Message peter1 = Message.of(
75 "{\"username\":\"peter\",\"word\":\"Hallo\"}",
77 Message peter2 = Message.of(
78 "{\"username\":\"peter\",\"word\":\"Welt\"}",
80 Message peter3 = Message.of(
81 "{\"username\":\"peter\",\"word\":\"Boäh\"}",
83 Message peter4 = Message.of(
84 "{\"username\":\"peter\",\"word\":\"Welt\"}",
86 Message peter5 = Message.of(
87 "{\"username\":\"peter\",\"word\":\"Boäh\"}",
89 Message peter6 = Message.of(
90 "{\"username\":\"peter\",\"word\":\"Boäh\"}",
93 Message klaus1 = Message.of(
94 "{\"username\":\"klaus\",\"word\":\"Müsch\"}",
96 Message klaus2 = Message.of(
97 "{\"username\":\"klaus\",\"word\":\"Müsch\"}",
99 Message klaus3 = Message.of(
100 "{\"username\":\"klaus\",\"word\":\"s\"}",
102 Message klaus4 = Message.of(
103 "{\"username\":\"klaus\",\"word\":\"s\"}",
105 Message klaus5 = Message.of(
106 "{\"username\":\"klaus\",\"word\":\"s\"}",
109 await("Expexted converted data")
110 .atMost(Duration.ofSeconds(10))
113 assertThat(consumer.received).hasSize(2);
114 assertThat(consumer.received.get("klaus")).containsExactly(klaus1, klaus2, klaus3, klaus4, klaus5);
115 assertThat(consumer.received.get("peter")).containsExactly(peter1, peter2, peter3, peter4, peter5, peter6);
120 @RequiredArgsConstructor
121 static class Consumer
123 private final MultiValueMap<String, Message> received = new LinkedMultiValueMap<>();
124 private final ObjectMapper mapper;
126 @KafkaListener(groupId = "TEST", topics = TOPIC_OUT)
127 public void receive(ConsumerRecord<String, String> record) throws JsonProcessingException
129 log.debug("Received message: {}", record);
130 Key key = mapper.readValue(record.key(), Key.class);
131 received.add(key.getUsername(), Message.of(record.key(),record.value()));
135 @Value(staticConstructor = "of")
143 static class Configuration
146 Consumer consumer(ObjectMapper mapper)
148 return new Consumer(mapper);