package de.juplo.kafka.wordcount.counter;
-import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
-import org.apache.kafka.clients.consumer.ConsumerRecord;
-import org.apache.kafka.clients.producer.ProducerConfig;
import org.apache.kafka.streams.state.KeyValueBytesStoreSupplier;
import org.apache.kafka.streams.state.Stores;
import org.junit.jupiter.api.BeforeEach;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Primary;
import org.springframework.kafka.annotation.KafkaListener;
-import org.springframework.kafka.core.DefaultKafkaProducerFactory;
import org.springframework.kafka.core.KafkaTemplate;
-import org.springframework.kafka.core.ProducerFactory;
-import org.springframework.kafka.support.serializer.JsonSerializer;
+import org.springframework.kafka.support.KafkaHeaders;
import org.springframework.kafka.test.context.EmbeddedKafka;
+import org.springframework.messaging.handler.annotation.Header;
+import org.springframework.messaging.handler.annotation.Payload;
+import org.springframework.util.LinkedMultiValueMap;
+import org.springframework.util.MultiValueMap;
import java.time.Duration;
-import java.util.LinkedList;
-import java.util.List;
-import java.util.Map;
-import java.util.Properties;
-import java.util.stream.Collectors;
-import static de.juplo.kafka.wordcount.counter.CounterApplicationIT.*;
-import static org.awaitility.Awaitility.*;
+import static de.juplo.kafka.wordcount.counter.CounterApplicationIT.TOPIC_IN;
+import static de.juplo.kafka.wordcount.counter.CounterApplicationIT.TOPIC_OUT;
+import static org.awaitility.Awaitility.await;
@SpringBootTest(
properties = {
- "spring.kafka.bootstrap-servers=${spring.embedded.kafka.brokers}",
+ "spring.kafka.producer.value-serializer=org.springframework.kafka.support.serializer.JsonSerializer",
+ "spring.kafka.producer.properties.spring.json.add.type.headers=false",
+ "spring.kafka.consumer.auto-offset-reset=earliest",
+ "spring.kafka.consumer.key-deserializer=org.springframework.kafka.support.serializer.JsonDeserializer",
+ "spring.kafka.consumer.value-deserializer=org.springframework.kafka.support.serializer.JsonDeserializer",
+ "spring.kafka.consumer.properties.spring.json.use.type.headers=false",
+ "spring.kafka.consumer.properties.spring.json.key.default.type=de.juplo.kafka.wordcount.counter.Word",
+ "spring.kafka.consumer.properties.spring.json.value.default.type=de.juplo.kafka.wordcount.counter.WordCounter",
+ "logging.level.root=WARN",
+ "logging.level.de.juplo=DEBUG",
"juplo.wordcount.counter.bootstrap-server=${spring.embedded.kafka.brokers}",
"juplo.wordcount.counter.commit-interval=0",
"juplo.wordcount.counter.cacheMaxBytes=0",
"juplo.wordcount.counter.input-topic=" + TOPIC_IN,
"juplo.wordcount.counter.output-topic=" + TOPIC_OUT })
-@EmbeddedKafka(topics = { TOPIC_IN, TOPIC_OUT }, partitions = PARTITIONS)
+@EmbeddedKafka(topics = { TOPIC_IN, TOPIC_OUT })
@Slf4j
public class CounterApplicationIT
{
- public final static String TOPIC_IN = "in";
- public final static String TOPIC_OUT = "out";
- static final int PARTITIONS = 2;
+ public static final String TOPIC_IN = "in";
+ public static final String TOPIC_OUT = "out";
@Autowired
KafkaTemplate<String, Word> kafkaTemplate;
}
- @RequiredArgsConstructor
static class Consumer
{
- private final List<Message> received = new LinkedList<>();
+ private final MultiValueMap<Word, WordCounter> received = new LinkedMultiValueMap<>();
@KafkaListener(groupId = "TEST", topics = TOPIC_OUT)
- public synchronized void receive(ConsumerRecord<String, String> record)
+ public synchronized void receive(
+ @Header(KafkaHeaders.RECEIVED_KEY) Word word,
+ @Payload WordCounter counter)
{
- log.debug("Received message: {}", record);
- received.add(Message.of(record.key(),record.value()));
+ log.debug("Received message: {} -> {}", word, counter);
+ received.add(word, counter);
}
- synchronized List<Message> getReceivedMessages()
+ synchronized MultiValueMap<Word, WordCounter> getReceivedMessages()
{
return received;
}
@TestConfiguration
static class Configuration
{
- @Bean
- ProducerFactory<?, ?> producerFactory(Properties streamProcessorProperties)
- {
- Map<String, Object> propertyMap = streamProcessorProperties
- .entrySet()
- .stream()
- .collect(
- Collectors.toMap(
- entry -> (String)entry.getKey(),
- entry -> entry.getValue()
- ));
-
- propertyMap.put(
- ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG,
- JsonSerializer.class.getName());
- propertyMap.put(
- ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG,
- JsonSerializer.class.getName());
-
- return new DefaultKafkaProducerFactory<>(propertyMap);
- }
-
@Bean
Consumer consumer()
{