From: Kai Moritz <kai@juplo.de>
Date: Sun, 5 Jun 2022 04:29:51 +0000 (+0200)
Subject: Springify: Einen Test für das Empfangen gemischter Nachrichten hinzugefügt
X-Git-Url: http://juplo.de/gitweb/?a=commitdiff_plain;h=bf6e53f9941724fffeb9e254937bd261c028f666;hp=295373025f1d167e31704d8474c332c9441c9b1b;p=demos%2Fkafka%2Ftraining

Springify: Einen Test für das Empfangen gemischter Nachrichten hinzugefügt
---

diff --git a/src/test/java/de/juplo/kafka/ApplicationTests.java b/src/test/java/de/juplo/kafka/ApplicationTests.java
index f13fdde..c3fbe45 100644
--- a/src/test/java/de/juplo/kafka/ApplicationTests.java
+++ b/src/test/java/de/juplo/kafka/ApplicationTests.java
@@ -1,5 +1,6 @@
 package de.juplo.kafka;
 
+import lombok.Value;
 import lombok.extern.slf4j.Slf4j;
 import org.apache.kafka.clients.consumer.KafkaConsumer;
 import org.apache.kafka.clients.producer.KafkaProducer;
@@ -23,8 +24,8 @@ import org.springframework.test.context.TestPropertySource;
 import org.springframework.test.context.junit.jupiter.SpringJUnitConfig;
 
 import java.time.Duration;
+import java.time.LocalDateTime;
 import java.util.*;
-import java.util.concurrent.ExecutionException;
 import java.util.function.BiConsumer;
 import java.util.function.BiFunction;
 import java.util.stream.Collectors;
@@ -55,8 +56,6 @@ class ApplicationTests
 	public static final int PARTITIONS = 10;
 
 
-	StringSerializer stringSerializer = new StringSerializer();
-
 	@Autowired
 	Serializer valueSerializer;
 	@Autowired
@@ -70,19 +69,47 @@ class ApplicationTests
 	@Autowired
 	EndlessConsumer endlessConsumer;
 	@Autowired
-	ClientMessageHandler clientMessageHandler;
+	MessageHandler<ClientMessage> clientMessageHandler;
+	@Autowired
+	MessageHandler<Greeting> greetingsHandler;
 
 	Map<TopicPartition, Long> oldOffsets;
 	Map<TopicPartition, Long> newOffsets;
-	Set<ClientMessage> received;
+	Set<Object> received;
 
 
 	/** Tests methods */
 
 	@Test
-	void commitsCurrentOffsetsOnSuccess() throws ExecutionException, InterruptedException
+	void commitsCurrentOffsetsOnSuccess()
 	{
-		send100Messages((key, counter) -> serialize(key, counter));
+		send100Messages((key, counter) -> serializeAsClientMessage(key, counter));
+
+		await("100 records received")
+				.atMost(Duration.ofSeconds(30))
+				.until(() -> received.size() == 100);
+
+		await("Offsets committed")
+				.atMost(Duration.ofSeconds(10))
+				.untilAsserted(() ->
+				{
+					checkSeenOffsetsForProgress();
+					compareToCommitedOffsets(newOffsets);
+				});
+
+		assertThat(endlessConsumer.isRunning())
+				.describedAs("Consumer should still be running")
+				.isTrue();
+	}
+
+
+	@Test
+	void mixedMessages()
+	{
+		send100Messages((key, counter) ->
+				counter%3 == 0
+						? serializeAsGreeting(key)
+						: serializeAsClientMessage(key, counter));
 
 		await("100 records received")
 				.atMost(Duration.ofSeconds(30))
@@ -106,8 +133,8 @@ class ApplicationTests
 	{
 		send100Messages((key, counter) ->
 				counter == 77
-						? new Bytes(stringSerializer.serialize(TOPIC, "BOOM!"))
-						: serialize(key, counter));
+						? serializeString("BOOM!", "message")
+						: serializeAsClientMessage(key, counter));
 
 		await("99 records received")
 				.atMost(Duration.ofSeconds(30))
@@ -142,7 +169,7 @@ class ApplicationTests
 				throw new RuntimeException("BOOM: " + clientMessage.message + "%10 == 0");
 		};
 
-		send100Messages((key, counter) -> serialize(key, counter));
+		send100Messages((key, counter) -> serializeAsClientMessage(key, counter));
 
 		await("80 records received")
 				.atMost(Duration.ofSeconds(30))
@@ -217,7 +244,7 @@ class ApplicationTests
 	}
 
 
-	void send100Messages(BiFunction<Integer, Long, Bytes> messageGenerator)
+	void send100Messages(BiFunction<Integer, Long, BytesAndType> recordGenerator)
 	{
 		long i = 0;
 
@@ -225,16 +252,16 @@ class ApplicationTests
 		{
 			for (int key = 0; key < 10; key++)
 			{
-				Bytes value = messageGenerator.apply(key, ++i);
+				BytesAndType bat = recordGenerator.apply(key, ++i);
 
 				ProducerRecord<String, Bytes> record =
 						new ProducerRecord<>(
 								TOPIC,
 								partition,
 								Integer.toString(key%2),
-								value);
+								bat.getValue());
 
-				record.headers().add("__TypeId__", "message".getBytes());
+				record.headers().add("__TypeId__", bat.getType());
 				kafkaProducer.send(record, (metadata, e) ->
 				{
 					if (metadata != null)
@@ -259,11 +286,29 @@ class ApplicationTests
 		}
 	}
 
-	Bytes serialize(Integer key, Long value)
+	BytesAndType serializeAsClientMessage(Integer key, Long value)
 	{
 		ClientMessage message = new ClientMessage();
 		message.setClient(key.toString());
 		message.setMessage(value.toString());
+		return new BytesAndType(serialize(message), "message");
+	}
+
+	BytesAndType serializeAsGreeting(Integer key)
+	{
+		Greeting greeting = new Greeting();
+		greeting.setName(key.toString());
+		greeting.setWhen(LocalDateTime.now());
+		return new BytesAndType(serialize(greeting), "greeting");
+	}
+
+	BytesAndType serializeString(String message, String messageType)
+	{
+		return new BytesAndType(new Bytes(message.getBytes()), messageType);
+	}
+
+	Bytes serialize(Object message)
+	{
 		return new Bytes(valueSerializer.serialize(TOPIC, message));
 	}
 
@@ -272,6 +317,7 @@ class ApplicationTests
 	public void init()
 	{
 		clientMessageHandler.testHandler = (clientMessage, metadata) -> {};
+		greetingsHandler.testHandler = (greeting, metadata) -> {};
 
 		oldOffsets = new HashMap<>();
 		newOffsets = new HashMap<>();
@@ -283,7 +329,7 @@ class ApplicationTests
 			newOffsets.put(tp, offset - 1);
 		});
 
-		clientMessageHandler.captureOffsets =
+		BiConsumer<?, ConsumerRecordMetadata> captureOffsets =
 				(clientMessage, metadata) ->
 				{
 					received.add(clientMessage);
@@ -292,6 +338,11 @@ class ApplicationTests
 							new TopicPartition(metadata.topic(), metadata.partition()), metadata.offset());
 				};
 
+		clientMessageHandler.captureOffsets =
+				(BiConsumer<ClientMessage, ConsumerRecordMetadata>)captureOffsets;
+		greetingsHandler.captureOffsets =
+				(BiConsumer<Greeting, ConsumerRecordMetadata>)captureOffsets;
+
 		endlessConsumer.start();
 	}
 
@@ -308,18 +359,18 @@ class ApplicationTests
 		}
 	}
 
-	public static class ClientMessageHandler implements BiConsumer<ClientMessage, ConsumerRecordMetadata>
+	public static class MessageHandler<T> implements BiConsumer<T, ConsumerRecordMetadata>
 	{
-		BiConsumer<ClientMessage, ConsumerRecordMetadata> captureOffsets;
-		BiConsumer<ClientMessage, ConsumerRecordMetadata> testHandler;
+		BiConsumer<T, ConsumerRecordMetadata> captureOffsets;
+		BiConsumer<T, ConsumerRecordMetadata> testHandler;
 
 
 		@Override
-		public void accept(ClientMessage clientMessage, ConsumerRecordMetadata metadata)
+		public void accept(T message, ConsumerRecordMetadata metadata)
 		{
 			captureOffsets
 					.andThen(testHandler)
-					.accept(clientMessage, metadata);
+					.accept(message, metadata);
 		}
 	}
 
@@ -329,9 +380,16 @@ class ApplicationTests
 	{
 		@Primary
 		@Bean
-		public BiConsumer<ClientMessage, ConsumerRecordMetadata> testHandler()
+		public MessageHandler<ClientMessage> messageHandler()
+		{
+			return new MessageHandler<>();
+		}
+
+		@Primary
+		@Bean
+		public MessageHandler<Greeting> greetingsHandler()
 		{
-			return new ClientMessageHandler();
+			return new MessageHandler<>();
 		}
 
 		@Bean
@@ -365,4 +423,19 @@ class ApplicationTests
 			return new KafkaConsumer<>(props);
 		}
 	}
+
+
+	@Value
+	static class BytesAndType
+	{
+		private final Bytes value;
+		private final byte[] type;
+
+
+		BytesAndType(Bytes value, String type)
+		{
+			this.value = value;
+			this.type = type.getBytes();
+		}
+	}
 }