package de.juplo.kafka;
-import org.apache.kafka.clients.consumer.ConsumerRecord;
+import lombok.extern.slf4j.Slf4j;
import org.apache.kafka.clients.producer.ProducerRecord;
-import org.apache.kafka.common.serialization.LongSerializer;
import org.apache.kafka.common.serialization.StringSerializer;
import org.apache.kafka.common.utils.Bytes;
-import org.springframework.boot.test.context.TestConfiguration;
-import org.springframework.context.annotation.Bean;
-import org.springframework.context.annotation.Primary;
-import org.springframework.test.context.ContextConfiguration;
+import org.springframework.beans.factory.annotation.Autowired;
-import java.util.Set;
+import java.util.*;
import java.util.function.Consumer;
+import java.util.stream.Collectors;
+import java.util.stream.IntStream;
+import static org.assertj.core.api.Assertions.assertThat;
-@ContextConfiguration(classes = ApplicationTests.Configuration.class)
-public class ApplicationTests extends GenericApplicationTests<String, Long>
+
+@Slf4j
+public class ApplicationTests extends GenericApplicationTests<String, String>
{
+ @Autowired
+ StateRepository stateRepository;
+
+
public ApplicationTests()
{
- super(
- new RecordGenerator()
- {
- final StringSerializer stringSerializer = new StringSerializer();
- final LongSerializer longSerializer = new LongSerializer();
+ super(new ApplicationTestRecrodGenerator());
+ ((ApplicationTestRecrodGenerator)recordGenerator).tests = this;
+ }
- @Override
- public void generate(
- int numberOfMessagesToGenerate,
- Set<Integer> poisonPills,
- Set<Integer> logicErrors,
- Consumer<ProducerRecord<Bytes, Bytes>> messageSender)
- {
- int i = 0;
+ static class ApplicationTestRecrodGenerator implements RecordGenerator
+ {
+ ApplicationTests tests;
- for (int partition = 0; partition < 10; partition++)
- {
- for (int key = 0; key < 10; key++)
- {
- if (++i > numberOfMessagesToGenerate)
- return;
+ final int[] numbers = {1, 77, 33, 2, 66, 666, 11};
+ final String[] dieWilden13 =
+ IntStream
+ .range(1, 14)
+ .mapToObj(i -> "seeräuber-" + i)
+ .toArray(i -> new String[i]);
+ final StringSerializer stringSerializer = new StringSerializer();
+ final Bytes calculateMessage = new Bytes(stringSerializer.serialize(TOPIC, "CALCULATE"));
- Bytes value = new Bytes(longSerializer.serialize(TOPIC, (long)i));
- if (logicErrors.contains(i))
- {
- value = new Bytes(longSerializer.serialize(TOPIC, Long.MIN_VALUE));
- }
- if (poisonPills.contains(i))
- {
- value = new Bytes(stringSerializer.serialize(TOPIC, "BOOM (Poison-Pill)!"));
- }
+ int counter = 0;
- ProducerRecord<Bytes, Bytes> record =
- new ProducerRecord<>(
- TOPIC,
- partition,
- new Bytes(stringSerializer.serialize(TOPIC,Integer.toString(partition*10+key%2))),
- value);
+ Map<String, List<AdderResult>> state;
- messageSender.accept(record);
- }
- }
+ @Override
+ public int generate(
+ boolean poisonPills,
+ boolean logicErrors,
+ Consumer<ProducerRecord<Bytes, Bytes>> messageSender)
+ {
+ counter = 0;
+ state =
+ Arrays
+ .stream(dieWilden13)
+ .collect(Collectors.toMap(
+ seeräuber -> seeräuber,
+ seeräuber -> new LinkedList()));
+
+ int number[] = { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 };
+ int message[] = { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 };
+ int next = 0;
+
+ for (int pass = 0; pass < 333; pass++)
+ {
+ for (int i = 0; i<13; i++)
+ {
+ String seeräuber = dieWilden13[i];
+ Bytes key = new Bytes(stringSerializer.serialize(TOPIC, seeräuber));
+
+ if (message[i] > number[i])
+ {
+ send(key, calculateMessage, fail(logicErrors, pass, counter), messageSender);
+ state.get(seeräuber).add(new AdderResult(number[i], (number[i] + 1) * number[i] / 2));
+ // Pick next number to calculate
+ number[i] = numbers[next++%numbers.length];
+ message[i] = 1;
+ log.debug("Seeräuber {} will die Summe für {} berechnen", seeräuber, number[i]);
}
- });
- }
+ Bytes value = new Bytes(stringSerializer.serialize(TOPIC, Integer.toString(message[i]++)));
+ send(key, value, fail(logicErrors, pass, counter), messageSender);
+ }
+ }
- @TestConfiguration
- public static class Configuration
- {
- @Primary
- @Bean
- public Consumer<ConsumerRecord<String, Long>> consumer()
+ return counter;
+ }
+
+ boolean fail (boolean logicErrors, int pass, int counter)
+ {
+ return logicErrors && pass > 300 && counter%77 == 0;
+ }
+
+ void send(
+ Bytes key,
+ Bytes value,
+ boolean fail,
+ Consumer<ProducerRecord<Bytes, Bytes>> messageSender)
{
- return (record) ->
+ counter++;
+
+ if (fail)
{
- if (record.value() == Long.MIN_VALUE)
- throw new RuntimeException("BOOM (Logic-Error)!");
- };
+ value = new Bytes(stringSerializer.serialize(TOPIC, Integer.toString(-1)));
+ }
+
+ messageSender.accept(new ProducerRecord<>(TOPIC, key, value));
+ }
+
+ @Override
+ public boolean canGeneratePoisonPill()
+ {
+ return false;
+ }
+
+ @Override
+ public void assertBusinessLogic()
+ {
+ for (int i=0; i<PARTITIONS; i++)
+ {
+ StateDocument stateDocument =
+ tests.stateRepository.findById(Integer.toString(i)).get();
+
+ stateDocument
+ .results
+ .entrySet()
+ .stream()
+ .forEach(entry ->
+ {
+ String user = entry.getKey();
+ List<AdderResult> resultsForUser = entry.getValue();
+
+ for (int j=0; j < resultsForUser.size(); j++)
+ {
+ if (!(j < state.get(user).size()))
+ {
+ break;
+ }
+
+ assertThat(resultsForUser.get(j))
+ .as("Unexpected results calculation %d of user %s", j, user)
+ .isEqualTo(state.get(user).get(j));
+ }
+
+ assertThat(state.get(user))
+ .as("More results calculated for user %s as expected", user)
+ .containsAll(resultsForUser);
+ });
+ }
}
}
}
projects / demos / kafka / training / blobdiff