From a0d314f7304de50eba56a59d9859e544354f2f7d Mon Sep 17 00:00:00 2001
From: Kai Moritz <kai@juplo.de>
Date: Wed, 12 Jun 2024 23:08:57 +0200
Subject: [PATCH] query: 2.0.0 - `QueryApplicationIT` uses two
 ``KafkaTemplate``s

* Switched the setup of the `QueryApplicationIT` to use two different
  instances  of `KafkaTemplate` for the two input-topics.
* This is a preparation for the introduction of the typed JSON-keys.
---
 .../wordcount/query/QueryApplicationIT.java   | 41 +++++++++++++++----
 1 file changed, 33 insertions(+), 8 deletions(-)

diff --git a/src/test/java/de/juplo/kafka/wordcount/query/QueryApplicationIT.java b/src/test/java/de/juplo/kafka/wordcount/query/QueryApplicationIT.java
index 58a1206..5eb4706 100644
--- a/src/test/java/de/juplo/kafka/wordcount/query/QueryApplicationIT.java
+++ b/src/test/java/de/juplo/kafka/wordcount/query/QueryApplicationIT.java
@@ -1,7 +1,11 @@
 package de.juplo.kafka.wordcount.query;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
+import de.juplo.kafka.wordcount.top10.TestRanking;
+import de.juplo.kafka.wordcount.users.TestUserData;
 import lombok.extern.slf4j.Slf4j;
+import org.apache.kafka.clients.producer.ProducerConfig;
+import org.apache.kafka.common.serialization.StringSerializer;
 import org.apache.kafka.streams.state.KeyValueBytesStoreSupplier;
 import org.apache.kafka.streams.state.Stores;
 import org.junit.jupiter.api.BeforeAll;
@@ -14,13 +18,16 @@ import org.springframework.boot.test.context.TestConfiguration;
 import org.springframework.context.annotation.Bean;
 import org.springframework.http.MediaType;
 import org.springframework.kafka.core.KafkaTemplate;
+import org.springframework.kafka.core.ProducerFactory;
 import org.springframework.kafka.support.SendResult;
+import org.springframework.kafka.support.serializer.JsonSerializer;
 import org.springframework.kafka.test.context.EmbeddedKafka;
 import org.springframework.test.web.servlet.MockMvc;
 import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
 
 import java.nio.charset.StandardCharsets;
 import java.time.Duration;
+import java.util.Map;
 import java.util.concurrent.CompletableFuture;
 
 import static de.juplo.kafka.wordcount.query.QueryStreamProcessor.RANKING_STORE_NAME;
@@ -32,9 +39,6 @@ import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.
 @SpringBootTest(
 		properties = {
 				"spring.main.allow-bean-definition-overriding=true",
-				"spring.kafka.producer.key-serializer=org.apache.kafka.common.serialization.StringSerializer",
-				"spring.kafka.producer.value-serializer=org.springframework.kafka.support.serializer.JsonSerializer",
-				"spring.kafka.producer.properties.spring.json.type.mapping=userdata:de.juplo.kafka.wordcount.users.TestUserData,ranking:de.juplo.kafka.wordcount.top10.TestRanking",
 				"logging.level.root=WARN",
 				"logging.level.de.juplo=DEBUG",
 				"logging.level.org.apache.kafka.clients=INFO",
@@ -63,21 +67,22 @@ public class QueryApplicationIT
 
 	@BeforeAll
 	public static void testSendMessage(
-			@Autowired KafkaTemplate<String, Object> kafkaTemplate)
+			@Autowired KafkaTemplate usersKafkaTemplate,
+			@Autowired KafkaTemplate top10KafkaTemplate)
 	{
 		TestData
 				.getUsersMessages()
-				.forEach(kv -> flush(kafkaTemplate.send(TOPIC_USERS, kv.key, kv.value)));
+				.forEach(kv -> flush(usersKafkaTemplate.send(TOPIC_USERS, kv.key, kv.value)));
 		TestData
 				.getTop10Messages()
-				.forEach(kv -> flush(kafkaTemplate.send(TOPIC_TOP10, kv.key, kv.value)));
+				.forEach(kv -> flush(top10KafkaTemplate.send(TOPIC_TOP10, kv.key, kv.value)));
 	}
 
-	private static void flush(CompletableFuture<SendResult<String, Object>> future)
+	private static void flush(CompletableFuture<SendResult> future)
 	{
 		try
 		{
-			SendResult<String, Object> result = future.get();
+			SendResult result = future.get();
 			log.info(
 					"Sent: {}={}, partition={}, offset={}",
 					result.getProducerRecord().key(),
@@ -132,6 +137,26 @@ public class QueryApplicationIT
 	@TestConfiguration
 	static class Configuration
 	{
+		@Bean
+		KafkaTemplate usersKafkaTemplate(ProducerFactory producerFactory)
+		{
+			Map<String, Object> properties = Map.of(
+					ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, StringSerializer.class.getName(),
+					ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, JsonSerializer.class.getName(),
+					JsonSerializer.TYPE_MAPPINGS, "userdata:" + TestUserData.class.getName());
+			return new KafkaTemplate(producerFactory, properties);
+		}
+
+		@Bean
+		KafkaTemplate top10KafkaTemplate(ProducerFactory producerFactory)
+		{
+			Map<String, Object> properties = Map.of(
+					ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, StringSerializer.class.getName(),
+					ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, JsonSerializer.class.getName(),
+					JsonSerializer.TYPE_MAPPINGS, "ranking:" + TestRanking.class.getName());
+			return new KafkaTemplate(producerFactory, properties);
+		}
+
 		@Bean
 		KeyValueBytesStoreSupplier userStoreSupplier()
 		{
-- 
2.20.1