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.input-topic=" + TOPIC_IN,
33 "juplo.wordcount.counter.output-topic=" + TOPIC_OUT })
34 @EmbeddedKafka(topics = { TOPIC_IN, TOPIC_OUT }, partitions = PARTITIONS)
36 public class CounterApplicationIT
38 public final static String TOPIC_IN = "in";
39 public final static String TOPIC_OUT = "out";
40 static final int PARTITIONS = 2;
43 KafkaTemplate<String, String> kafkaTemplate;
53 consumer.received.clear();
58 void testSendMessage() throws Exception
60 kafkaTemplate.send(TOPIC_IN, "peter", "Hallo");
61 kafkaTemplate.send(TOPIC_IN, "klaus", "Müsch");
62 kafkaTemplate.send(TOPIC_IN, "peter", "Welt");
63 kafkaTemplate.send(TOPIC_IN, "klaus", "Müsch");
64 kafkaTemplate.send(TOPIC_IN, "klaus", "s");
65 kafkaTemplate.send(TOPIC_IN, "peter", "Boäh");
66 kafkaTemplate.send(TOPIC_IN, "peter", "Welt");
67 kafkaTemplate.send(TOPIC_IN, "peter", "Boäh");
68 kafkaTemplate.send(TOPIC_IN, "klaus", "s");
69 kafkaTemplate.send(TOPIC_IN, "peter", "Boäh");
70 kafkaTemplate.send(TOPIC_IN, "klaus", "s");
72 Message peter1 = Message.of(
73 "{\"username\":\"peter\",\"word\":\"Hallo\"}",
75 Message peter2 = Message.of(
76 "{\"username\":\"peter\",\"word\":\"Welt\"}",
78 Message peter3 = Message.of(
79 "{\"username\":\"peter\",\"word\":\"Boäh\"}",
81 Message peter4 = Message.of(
82 "{\"username\":\"peter\",\"word\":\"Welt\"}",
84 Message peter5 = Message.of(
85 "{\"username\":\"peter\",\"word\":\"Boäh\"}",
87 Message peter6 = Message.of(
88 "{\"username\":\"peter\",\"word\":\"Boäh\"}",
91 Message klaus1 = Message.of(
92 "{\"username\":\"klaus\",\"word\":\"Müsch\"}",
94 Message klaus2 = Message.of(
95 "{\"username\":\"klaus\",\"word\":\"Müsch\"}",
97 Message klaus3 = Message.of(
98 "{\"username\":\"klaus\",\"word\":\"s\"}",
100 Message klaus4 = Message.of(
101 "{\"username\":\"klaus\",\"word\":\"s\"}",
103 Message klaus5 = Message.of(
104 "{\"username\":\"klaus\",\"word\":\"s\"}",
107 await("Expexted converted data")
108 .atMost(Duration.ofSeconds(10))
111 assertThat(consumer.received).hasSize(2);
112 assertThat(consumer.received.get("klaus")).containsExactly(klaus1, klaus2, klaus3, klaus4, klaus5);
113 assertThat(consumer.received.get("peter")).containsExactly(peter1, peter2, peter3, peter4, peter5, peter6);
118 @RequiredArgsConstructor
119 static class Consumer
121 private final MultiValueMap<String, Message> received = new LinkedMultiValueMap<>();
122 private final ObjectMapper mapper;
124 @KafkaListener(groupId = "TEST", topics = TOPIC_OUT)
125 public void receive(ConsumerRecord<String, String> record) throws JsonProcessingException
127 log.debug("Received message: {}", record);
128 Key key = mapper.readValue(record.key(), Key.class);
129 received.add(key.getUsername(), Message.of(record.key(),record.value()));
133 @Value(staticConstructor = "of")
141 static class Configuration
144 Consumer consumer(ObjectMapper mapper)
146 return new Consumer(mapper);