Die Implementierung speichert Zustand & Offsets vor _jedem_ `poll()`

[demos/kafka/training] / src / test / java / de / juplo / kafka / GenericApplicationTests.java

diff --git a/src/test/java/de/juplo/kafka/GenericApplicationTests.java b/src/test/java/de/juplo/kafka/GenericApplicationTests.java
index 649cdba..8124c81 100644 (file)
--- a/src/test/java/de/juplo/kafka/GenericApplicationTests.java
+++ b/src/test/java/de/juplo/kafka/GenericApplicationTests.java
@@ -1,5 +1,6 @@
 package de.juplo.kafka;
 
+import com.mongodb.client.MongoClient;
 import lombok.extern.slf4j.Slf4j;
 import org.apache.kafka.clients.consumer.ConsumerRecord;
 import org.apache.kafka.clients.consumer.KafkaConsumer;
@@ -11,6 +12,9 @@ import org.apache.kafka.common.serialization.*;
 import org.apache.kafka.common.utils.Bytes;
 import org.junit.jupiter.api.*;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.autoconfigure.mongo.MongoProperties;
+import org.springframework.boot.test.autoconfigure.data.mongo.AutoConfigureDataMongo;
 import org.springframework.boot.test.context.ConfigDataApplicationContextInitializer;
 import org.springframework.boot.test.context.TestConfiguration;
 import org.springframework.context.annotation.Import;
@@ -35,10 +39,13 @@ import static org.awaitility.Awaitility.*;
 @SpringJUnitConfig(initializers = ConfigDataApplicationContextInitializer.class)
 @TestPropertySource(
                properties = {
-                               "consumer.bootstrap-server=${spring.embedded.kafka.brokers}",
-                               "consumer.topic=" + TOPIC,
-                               "consumer.commit-interval=500ms" })
+                               "sumup.adder.bootstrap-server=${spring.embedded.kafka.brokers}",
+                               "sumup.adder.topic=" + TOPIC,
+                               "sumup.adder.commit-interval=500ms",
+                               "spring.mongodb.embedded.version=4.4.13" })
 @EmbeddedKafka(topics = TOPIC, partitions = PARTITIONS)
+@EnableAutoConfiguration
+@AutoConfigureDataMongo
 @Slf4j
 abstract class GenericApplicationTests<K, V>
 {
@@ -54,6 +61,14 @@ abstract class GenericApplicationTests<K, V>
        ApplicationProperties properties;
        @Autowired
        ExecutorService executor;
+       @Autowired
+       MongoClient mongoClient;
+       @Autowired
+       MongoProperties mongoProperties;
+       @Autowired
+       RebalanceListener rebalanceListener;
+       @Autowired
+       RecordHandler<K, V> recordHandler;
 
        KafkaProducer<Bytes, Bytes> testRecordProducer;
        KafkaConsumer<Bytes, Bytes> offsetConsumer;
@@ -76,7 +91,7 @@ abstract class GenericApplicationTests<K, V>
        /** Tests methods */
 
        @Test
-       void commitsCurrentOffsetsOnSuccess()
+       void commitsCurrentOffsetsOnSuccess() throws Exception
        {
                int numberOfGeneratedMessages =
                                recordGenerator.generate(false, false, messageSender);
@@ -99,6 +114,7 @@ abstract class GenericApplicationTests<K, V>
                                .isThrownBy(() -> endlessConsumer.exitStatus())
                                .describedAs("Consumer should still be running");
 
+               endlessConsumer.stop();
                recordGenerator.assertBusinessLogic();
        }
 
@@ -196,7 +212,7 @@ abstract class GenericApplicationTests<K, V>
                        Long expected = offsetsToCheck.get(tp) + 1;
                        log.debug("Checking, if the offset {} for {} is at most {}", offset, tp, expected);
                        assertThat(offset)
-                                       .describedAs("Committed offset corresponds to the offset of the consumer")
+                                       .describedAs("Committed offset must be at most equal to the offset of the consumer")
                                        .isLessThanOrEqualTo(expected);
                        isOffsetBehindSeen.add(offset < expected);
                });
@@ -327,6 +343,7 @@ abstract class GenericApplicationTests<K, V>
                props.put("value.deserializer", BytesDeserializer.class.getName());
                offsetConsumer = new KafkaConsumer<>(props);
 
+               mongoClient.getDatabase(mongoProperties.getDatabase()).drop();
                seekToEnd();
 
                oldOffsets = new HashMap<>();
@@ -339,14 +356,17 @@ abstract class GenericApplicationTests<K, V>
                        seenOffsets.put(tp, offset - 1);
                });
 
-               Consumer<ConsumerRecord<K, V>> captureOffsetAndExecuteTestHandler =
-                               record ->
+               TestRecordHandler<K, V> captureOffsetAndExecuteTestHandler =
+                               new TestRecordHandler<K, V>(recordHandler)
                                {
-                                       seenOffsets.put(
-                                                       new TopicPartition(record.topic(), record.partition()),
-                                                       record.offset());
-                                       receivedRecords.add(record);
-                                       consumer.accept(record);
+                                       @Override
+                                       public void onNewRecord(ConsumerRecord<K, V> record)
+                                       {
+                                               seenOffsets.put(
+                                                               new TopicPartition(record.topic(), record.partition()),
+                                                               record.offset());
+                                               receivedRecords.add(record);
+                                       }
                                };
 
                endlessConsumer =
@@ -355,6 +375,7 @@ abstract class GenericApplicationTests<K, V>
                                                properties.getClientId(),
                                                properties.getTopic(),
                                                kafkaConsumer,
+                                               rebalanceListener,
                                                captureOffsetAndExecuteTestHandler);
 
                endlessConsumer.start();
@@ -365,7 +386,6 @@ abstract class GenericApplicationTests<K, V>
        {
                try
                {
-                       endlessConsumer.stop();
                        testRecordProducer.close();
                        offsetConsumer.close();
                }