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Single and Multiple Partition test.

This commit is contained in:
Amol Gote 2023-10-15 15:28:15 -04:00
parent 307d0f5e40
commit 8772eaa673
4 changed files with 245 additions and 1 deletions
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3
apache-kafka-2/pom.xml
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@ -60,7 +60,7 @@
<dependency> <dependency>
<groupId>com.fasterxml.jackson.core</groupId> <groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId> <artifactId>jackson-databind</artifactId>
<version>2.15.2</version> <version>${jackson.databind.version} </version>
</dependency> </dependency>
</dependencies> </dependencies>
@ -69,6 +69,7 @@
<kafka.version>2.8.0</kafka.version> <kafka.version>2.8.0</kafka.version>
<testcontainers-kafka.version>1.15.3</testcontainers-kafka.version> <testcontainers-kafka.version>1.15.3</testcontainers-kafka.version>
<testcontainers-jupiter.version>1.15.3</testcontainers-jupiter.version> <testcontainers-jupiter.version>1.15.3</testcontainers-jupiter.version>
<jackson.databind.version>2.15.2</jackson.databind.version>
</properties> </properties>
</project> </project>

14
apache-kafka-2/src/main/java/com/baeldung/kafka/message/ordering/payload/Message.java
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@ -1,5 +1,6 @@
package com.baeldung.kafka.message.ordering.payload; package com.baeldung.kafka.message.ordering.payload;
import javax.swing.*;
import java.util.Random; import java.util.Random;
public class Message implements Comparable<Message> { public class Message implements Comparable<Message> {
@ -10,6 +11,7 @@ public class Message implements Comparable<Message> {
} }
//Required for Kafka Serialization and Deserialization
public Message(long insertPosition, long messageId) { public Message(long insertPosition, long messageId) {
this.insertPosition = insertPosition; this.insertPosition = insertPosition;
this.messageId = messageId; this.messageId = messageId;
@ -28,6 +30,18 @@ public class Message implements Comparable<Message> {
return Long.compare(this.messageId, other.messageId); return Long.compare(this.messageId, other.messageId);
} }
@Override
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
if (!(obj instanceof Message)) {
return false;
}
Message message = (Message) obj;
return this.messageId == message.getMessageId() && this.insertPosition == message.getInsertPosition();
}
public static long getRandomMessageId() { public static long getRandomMessageId() {
Random rand = new Random(); Random rand = new Random();
return rand.nextInt(1000); return rand.nextInt(1000);

114
apache-kafka-2/src/test/java/com/baeldung/kafka/message/ordering/MultiplePartitionTest.java Normal file
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@ -0,0 +1,114 @@
package com.baeldung.kafka.message.ordering;
import com.baeldung.kafka.message.ordering.payload.Message;
import lombok.var;
import org.apache.kafka.clients.admin.*;
import org.apache.kafka.clients.consumer.ConsumerConfig;
import org.apache.kafka.clients.consumer.ConsumerRecords;
import org.apache.kafka.clients.consumer.KafkaConsumer;
import org.apache.kafka.clients.producer.KafkaProducer;
import org.apache.kafka.clients.producer.ProducerConfig;
import org.apache.kafka.clients.producer.ProducerRecord;
import org.apache.kafka.clients.producer.RecordMetadata;
import org.apache.kafka.common.KafkaFuture;
import org.apache.kafka.common.PartitionInfo;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.Test;
import org.testcontainers.containers.KafkaContainer;
import org.testcontainers.junit.jupiter.Container;
import org.testcontainers.junit.jupiter.Testcontainers;
import org.testcontainers.utility.DockerImageName;
import java.time.Duration;
import java.util.*;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import static org.junit.jupiter.api.Assertions.*;
@Testcontainers
public class MultiplePartitionTest {
private static String TOPIC = "multi_partition_topic";
private static int PARTITIONS = 5;
private static short REPLICATION_FACTOR = 1;
private static Admin admin;
private static KafkaProducer<String, Message> producer;
private static KafkaConsumer<String, Message> consumer;
private static final Duration TIMEOUT_WAIT_FOR_MESSAGES = Duration.ofMillis(5000);
@Container
private static final KafkaContainer KAFKA_CONTAINER = new KafkaContainer(DockerImageName.parse("confluentinc/cp-kafka:latest"));
@BeforeAll
static void setup() throws ExecutionException, InterruptedException {
KAFKA_CONTAINER.addExposedPort(9092);
Properties adminProperties = new Properties();
adminProperties.put(AdminClientConfig.BOOTSTRAP_SERVERS_CONFIG, KAFKA_CONTAINER.getBootstrapServers());
Properties producerProperties = new Properties();
producerProperties.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, KAFKA_CONTAINER.getBootstrapServers());
producerProperties.put("key.serializer", "org.apache.kafka.common.serialization.StringSerializer");
producerProperties.put("value.serializer", "com.baeldung.kafka.message.ordering.serialization.JacksonSerializer");
Properties consumerProperties = new Properties();
consumerProperties.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, KAFKA_CONTAINER.getBootstrapServers());
consumerProperties.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, "org.apache.kafka.common.serialization.StringDeserializer");
consumerProperties.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, "com.baeldung.kafka.message.ordering.serialization.JacksonDeserializer");
consumerProperties.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");
consumerProperties.put("value.deserializer.serializedClass", Message.class);
consumerProperties.put(ConsumerConfig.GROUP_ID_CONFIG, "test-group");
admin = Admin.create(adminProperties);
producer = new KafkaProducer<>(producerProperties);
consumer = new KafkaConsumer<>(consumerProperties);
List<NewTopic> topicList = new ArrayList<>();
NewTopic newTopic = new NewTopic(TOPIC, PARTITIONS, REPLICATION_FACTOR);
topicList.add(newTopic);
CreateTopicsResult result = admin.createTopics(topicList);
KafkaFuture<Void> future = result.values().get(TOPIC);
future.whenComplete((voidResult, exception) -> {
if (exception != null) {
System.err.println("Error creating the topic: " + exception.getMessage());
} else {
System.out.println("Topic created successfully!");
}
}).get();
}
@AfterAll
static void destroy() {
KAFKA_CONTAINER.stop();
}
@Test
void givenMultiplePartitions_whenPublishedToKafkaAndConsumed_thenCheckForMessageOrder() throws ExecutionException, InterruptedException {
List<Message> sentMessageList = new ArrayList<>();
List<Message> receivedMessageList = new ArrayList<>();
for (long insertPosition = 1; insertPosition <= 10 ; insertPosition++) {
long messageId = Message.getRandomMessageId();
String key = "Key-" + insertPosition;
Message message = new Message(insertPosition, messageId);
Future<RecordMetadata> future = producer.send(new ProducerRecord<>(TOPIC, key, message));
sentMessageList.add(message);
RecordMetadata metadata = future.get();
System.out.println("Partition : " + metadata.partition());
}
boolean isOrderMaintained = true;
consumer.subscribe(Collections.singletonList(TOPIC));
ConsumerRecords<String, Message> records = consumer.poll(TIMEOUT_WAIT_FOR_MESSAGES);
records.forEach(record -> {
Message message = record.value();
receivedMessageList.add(message);
});
for (int insertPosition = 0; insertPosition <= receivedMessageList.size() - 1; insertPosition++) {
if (isOrderMaintained){
Message sentMessage = sentMessageList.get(insertPosition);
Message receivedMessage = receivedMessageList.get(insertPosition);
if (!sentMessage.equals(receivedMessage)) {
isOrderMaintained = false;
}
}
}
assertFalse(isOrderMaintained);
}
}

115
apache-kafka-2/src/test/java/com/baeldung/kafka/message/ordering/SinglePartitionTest.java Normal file
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@ -0,0 +1,115 @@
package com.baeldung.kafka.message.ordering;
import com.baeldung.kafka.message.ordering.payload.Message;
import org.apache.kafka.clients.admin.Admin;
import org.apache.kafka.clients.admin.AdminClientConfig;
import org.apache.kafka.clients.admin.CreateTopicsResult;
import org.apache.kafka.clients.admin.NewTopic;
import org.apache.kafka.clients.consumer.ConsumerConfig;
import org.apache.kafka.clients.consumer.ConsumerRecords;
import org.apache.kafka.clients.consumer.KafkaConsumer;
import org.apache.kafka.clients.producer.KafkaProducer;
import org.apache.kafka.clients.producer.ProducerConfig;
import org.apache.kafka.clients.producer.ProducerRecord;
import org.apache.kafka.clients.producer.RecordMetadata;
import org.apache.kafka.common.KafkaFuture;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.Test;
import org.testcontainers.containers.KafkaContainer;
import org.testcontainers.junit.jupiter.Container;
import org.testcontainers.junit.jupiter.Testcontainers;
import org.testcontainers.utility.DockerImageName;
import java.time.Duration;
import java.util.*;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import static org.junit.jupiter.api.Assertions.assertTrue;
@Testcontainers
public class SinglePartitionTest {
private static String TOPIC = "single_partition_topic";
private static int PARTITIONS = 1;
private static short REPLICATION_FACTOR = 1;
private static Admin admin;
private static KafkaProducer<String, Message> producer;
private static KafkaConsumer<String, Message> consumer;
private static final Duration TIMEOUT_WAIT_FOR_MESSAGES = Duration.ofMillis(5000);
@Container
private static final KafkaContainer KAFKA_CONTAINER = new KafkaContainer(DockerImageName.parse("confluentinc/cp-kafka:latest"));
@BeforeAll
static void setup() throws ExecutionException, InterruptedException {
KAFKA_CONTAINER.addExposedPort(9092);
Properties adminProperties = new Properties();
adminProperties.put(AdminClientConfig.BOOTSTRAP_SERVERS_CONFIG, KAFKA_CONTAINER.getBootstrapServers());
Properties producerProperties = new Properties();
producerProperties.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, KAFKA_CONTAINER.getBootstrapServers());
producerProperties.put("key.serializer", "org.apache.kafka.common.serialization.StringSerializer");
producerProperties.put("value.serializer", "com.baeldung.kafka.message.ordering.serialization.JacksonSerializer");
Properties consumerProperties = new Properties();
consumerProperties.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, KAFKA_CONTAINER.getBootstrapServers());
consumerProperties.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, "org.apache.kafka.common.serialization.StringDeserializer");
consumerProperties.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, "com.baeldung.kafka.message.ordering.serialization.JacksonDeserializer");
consumerProperties.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");
consumerProperties.put("value.deserializer.serializedClass", Message.class);
consumerProperties.put(ConsumerConfig.GROUP_ID_CONFIG, "test-group");
admin = Admin.create(adminProperties);
producer = new KafkaProducer<>(producerProperties);
consumer = new KafkaConsumer<>(consumerProperties);
List<NewTopic> topicList = new ArrayList<>();
NewTopic newTopic = new NewTopic(TOPIC, PARTITIONS, REPLICATION_FACTOR);
topicList.add(newTopic);
CreateTopicsResult result = admin.createTopics(topicList);
KafkaFuture<Void> future = result.values().get(TOPIC);
future.whenComplete((voidResult, exception) -> {
if (exception != null) {
System.err.println("Error creating the topic: " + exception.getMessage());
} else {
System.out.println("Topic created successfully!");
}
}).get();
}
@AfterAll
static void destroy() {
KAFKA_CONTAINER.stop();
}
@Test
void givenASinglePartition_whenPublishedToKafkaAndConsumed_thenCheckForMessageOrder() throws ExecutionException, InterruptedException {
List<Message> sentMessageList = new ArrayList<>();
List<Message> receivedMessageList = new ArrayList<>();
for (long insertPosition = 1; insertPosition <= 10 ; insertPosition++) {
long messageId = Message.getRandomMessageId();
String key = "Key-" + insertPosition;
Message message = new Message(insertPosition, messageId);
ProducerRecord<String, Message> producerRecord = new ProducerRecord<>(TOPIC, key, message);
Future<RecordMetadata> future = producer.send(producerRecord);
sentMessageList.add(message);
RecordMetadata metadata = future.get();
System.out.println("Partition : " + metadata.partition());
}
consumer.subscribe(Collections.singletonList(TOPIC));
ConsumerRecords<String, Message> records = consumer.poll(TIMEOUT_WAIT_FOR_MESSAGES);
records.forEach(record -> {
Message message = record.value();
receivedMessageList.add(message);
});
boolean result = true;
for (int count = 0; count <= 9 ; count++) {
Message sentMessage = sentMessageList.get(count);
Message receivedMessage = receivedMessageList.get(count);
if (!sentMessage.equals(receivedMessage) && result){
result = false;
}
}
assertTrue(result);
}
}