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.apache.kafka.streams.state.KeyValueBytesStoreSupplier;
10 import org.apache.kafka.streams.state.Stores;
11 import org.junit.jupiter.api.BeforeEach;
12 import org.junit.jupiter.api.Test;
13 import org.springframework.beans.factory.annotation.Autowired;
14 import org.springframework.boot.test.context.SpringBootTest;
15 import org.springframework.boot.test.context.TestConfiguration;
16 import org.springframework.context.annotation.Bean;
17 import org.springframework.context.annotation.Primary;
18 import org.springframework.kafka.annotation.KafkaListener;
19 import org.springframework.kafka.core.KafkaTemplate;
20 import org.springframework.kafka.test.context.EmbeddedKafka;
21 import org.springframework.util.LinkedMultiValueMap;
22 import org.springframework.util.MultiValueMap;
24 import java.time.Duration;
26 import static de.juplo.kafka.wordcount.counter.CounterApplicationIT.*;
27 import static org.assertj.core.api.Assertions.assertThat;
28 import static org.awaitility.Awaitility.*;
33 "spring.kafka.bootstrap-servers=${spring.embedded.kafka.brokers}",
34 "juplo.wordcount.counter.bootstrap-server=${spring.embedded.kafka.brokers}",
35 "juplo.wordcount.counter.commit-interval=0",
36 "juplo.wordcount.counter.cacheMaxBytes=0",
37 "juplo.wordcount.counter.input-topic=" + TOPIC_IN,
38 "juplo.wordcount.counter.output-topic=" + TOPIC_OUT })
39 @EmbeddedKafka(topics = { TOPIC_IN, TOPIC_OUT }, partitions = PARTITIONS)
41 public class CounterApplicationIT
43 public final static String TOPIC_IN = "in";
44 public final static String TOPIC_OUT = "out";
45 static final int PARTITIONS = 2;
48 KafkaTemplate<String, String> kafkaTemplate;
58 consumer.received.clear();
63 void testSendMessage() throws Exception
65 kafkaTemplate.send(TOPIC_IN, "peter", "Hallo");
66 kafkaTemplate.send(TOPIC_IN, "klaus", "Müsch");
67 kafkaTemplate.send(TOPIC_IN, "peter", "Welt");
68 kafkaTemplate.send(TOPIC_IN, "klaus", "Müsch");
69 kafkaTemplate.send(TOPIC_IN, "klaus", "s");
70 kafkaTemplate.send(TOPIC_IN, "peter", "Boäh");
71 kafkaTemplate.send(TOPIC_IN, "peter", "Welt");
72 kafkaTemplate.send(TOPIC_IN, "peter", "Boäh");
73 kafkaTemplate.send(TOPIC_IN, "klaus", "s");
74 kafkaTemplate.send(TOPIC_IN, "peter", "Boäh");
75 kafkaTemplate.send(TOPIC_IN, "klaus", "s");
77 Message peter1 = Message.of(
78 "{\"username\":\"peter\",\"word\":\"Hallo\"}",
80 Message peter2 = Message.of(
81 "{\"username\":\"peter\",\"word\":\"Welt\"}",
83 Message peter3 = Message.of(
84 "{\"username\":\"peter\",\"word\":\"Boäh\"}",
86 Message peter4 = Message.of(
87 "{\"username\":\"peter\",\"word\":\"Welt\"}",
89 Message peter5 = Message.of(
90 "{\"username\":\"peter\",\"word\":\"Boäh\"}",
92 Message peter6 = Message.of(
93 "{\"username\":\"peter\",\"word\":\"Boäh\"}",
96 Message klaus1 = Message.of(
97 "{\"username\":\"klaus\",\"word\":\"Müsch\"}",
99 Message klaus2 = Message.of(
100 "{\"username\":\"klaus\",\"word\":\"Müsch\"}",
102 Message klaus3 = Message.of(
103 "{\"username\":\"klaus\",\"word\":\"s\"}",
105 Message klaus4 = Message.of(
106 "{\"username\":\"klaus\",\"word\":\"s\"}",
108 Message klaus5 = Message.of(
109 "{\"username\":\"klaus\",\"word\":\"s\"}",
112 await("Expexted converted data")
113 .atMost(Duration.ofSeconds(10))
116 assertThat(consumer.received).hasSize(2);
117 assertThat(consumer.received.get("klaus")).containsExactly(klaus1, klaus2, klaus3, klaus4, klaus5);
118 assertThat(consumer.received.get("peter")).containsExactly(peter1, peter2, peter3, peter4, peter5, peter6);
123 @RequiredArgsConstructor
124 static class Consumer
126 private final MultiValueMap<String, Message> received = new LinkedMultiValueMap<>();
127 private final ObjectMapper mapper;
129 @KafkaListener(groupId = "TEST", topics = TOPIC_OUT)
130 public void receive(ConsumerRecord<String, String> record) throws JsonProcessingException
132 log.debug("Received message: {}", record);
133 Key key = mapper.readValue(record.key(), Key.class);
134 received.add(key.getUsername(), Message.of(record.key(),record.value()));
138 @Value(staticConstructor = "of")
146 static class Configuration
149 Consumer consumer(ObjectMapper mapper)
151 return new Consumer(mapper);
156 KeyValueBytesStoreSupplier inMemoryStoreSupplier()
158 return Stores.inMemoryKeyValueStore("TEST-STORE");