| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.rya.streams.kafka.queries; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertFalse; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.UUID; |
| |
| import org.apache.kafka.clients.consumer.Consumer; |
| import org.apache.kafka.clients.consumer.ConsumerRecords; |
| import org.apache.kafka.clients.producer.Producer; |
| import org.apache.kafka.common.TopicPartition; |
| import org.apache.kafka.common.serialization.StringDeserializer; |
| import org.apache.kafka.common.serialization.StringSerializer; |
| import org.apache.rya.streams.api.queries.ChangeLogEntry; |
| import org.apache.rya.streams.api.queries.QueryChange; |
| import org.apache.rya.streams.api.queries.QueryChangeLog.QueryChangeLogException; |
| import org.apache.rya.streams.kafka.serialization.queries.QueryChangeDeserializer; |
| import org.apache.rya.streams.kafka.serialization.queries.QueryChangeSerializer; |
| import org.apache.rya.test.kafka.KafkaITBase; |
| import org.apache.rya.test.kafka.KafkaTestInstanceRule; |
| import org.apache.rya.test.kafka.KafkaTestUtil; |
| import org.junit.After; |
| import org.junit.Before; |
| import org.junit.Rule; |
| import org.junit.Test; |
| |
| import com.google.common.collect.Lists; |
| |
| import info.aduna.iteration.CloseableIteration; |
| |
| /** |
| * Integration tests the {@link KafkaQueryChangeLog}. |
| */ |
| public class KafkaQueryChangeLogIT extends KafkaITBase { |
| |
| private KafkaQueryChangeLog changeLog; |
| private Producer<?, QueryChange> producer; |
| private Consumer<?, QueryChange> consumer; |
| private String topic; |
| |
| @Rule |
| public KafkaTestInstanceRule rule = new KafkaTestInstanceRule(true); |
| |
| @Before |
| public void setup() { |
| topic = rule.getKafkaTopicName(); |
| producer = KafkaTestUtil.makeProducer(rule, StringSerializer.class, QueryChangeSerializer.class); |
| consumer = KafkaTestUtil.fromStartConsumer(rule, StringDeserializer.class, QueryChangeDeserializer.class); |
| changeLog = new KafkaQueryChangeLog(producer, consumer, topic); |
| } |
| |
| @After |
| public void cleanup() { |
| producer.close(); |
| consumer.close(); |
| } |
| |
| @Test |
| public void testWrite() throws Exception { |
| final String sparql = "SOME QUERY HERE"; |
| final UUID uuid = UUID.randomUUID(); |
| final QueryChange newChange = QueryChange.create(uuid, sparql, true, false); |
| changeLog.write(newChange); |
| |
| consumer.subscribe(Lists.newArrayList(topic)); |
| final ConsumerRecords<?, QueryChange> records = consumer.poll(2000); |
| assertEquals(1, records.count()); |
| |
| final QueryChange record = records.iterator().next().value(); |
| assertEquals(newChange, record); |
| } |
| |
| @Test |
| public void readSingleWrite() throws Exception { |
| // Write a single change to the log. |
| final QueryChange change = QueryChange.create(UUID.randomUUID(), "query", true, false); |
| changeLog.write(change); |
| |
| // Read that entry from the log. |
| final QueryChange readChange = changeLog.readFromStart().next().getEntry(); |
| assertEquals(change, readChange); |
| } |
| |
| @Test |
| public void readFromBegining() throws Exception { |
| final List<QueryChange> expected = write10ChangesToChangeLog(); |
| |
| final CloseableIteration<ChangeLogEntry<QueryChange>, QueryChangeLogException> iter = changeLog.readFromStart(); |
| |
| final List<QueryChange> actual = new ArrayList<>(); |
| while (iter.hasNext()) { |
| final ChangeLogEntry<QueryChange> entry = iter.next(); |
| actual.add(entry.getEntry()); |
| } |
| assertEquals(expected, actual); |
| } |
| |
| @Test |
| public void readFromBegining_positionStartsNotBegining() throws Exception { |
| final List<QueryChange> expected = write10ChangesToChangeLog(); |
| |
| // set the position to some non-0 position |
| final TopicPartition partition = new TopicPartition(topic, 0); |
| consumer.assign(Lists.newArrayList(partition)); |
| consumer.seek(partition, 5L); |
| final CloseableIteration<ChangeLogEntry<QueryChange>, QueryChangeLogException> iter = changeLog.readFromStart(); |
| |
| final List<QueryChange> actual = new ArrayList<>(); |
| while (iter.hasNext()) { |
| final ChangeLogEntry<QueryChange> entry = iter.next(); |
| actual.add(entry.getEntry()); |
| } |
| assertEquals(expected, actual); |
| } |
| |
| @Test |
| public void readFromPosition_positionStartsBegining() throws Exception { |
| final List<QueryChange> expected = write10ChangesToChangeLog().subList(5, 10); |
| |
| // set the position to some non-0 position |
| final TopicPartition partition = new TopicPartition(topic, 0); |
| consumer.assign(Lists.newArrayList(partition)); |
| consumer.seekToBeginning(Lists.newArrayList(partition)); |
| final CloseableIteration<ChangeLogEntry<QueryChange>, QueryChangeLogException> iter = changeLog.readFromPosition(5L); |
| |
| final List<QueryChange> actual = new ArrayList<>(); |
| while (iter.hasNext()) { |
| final ChangeLogEntry<QueryChange> entry = iter.next(); |
| actual.add(entry.getEntry()); |
| } |
| assertEquals(expected, actual); |
| } |
| |
| @Test |
| public void readFromPosition_positionStartsNotBegining() throws Exception { |
| final List<QueryChange> expected = write10ChangesToChangeLog().subList(5, 10); |
| |
| // set the position to some non-0 position |
| final TopicPartition partition = new TopicPartition(topic, 0); |
| consumer.assign(Lists.newArrayList(partition)); |
| consumer.seekToEnd(Lists.newArrayList(partition)); |
| final CloseableIteration<ChangeLogEntry<QueryChange>, QueryChangeLogException> iter = changeLog.readFromPosition(5L); |
| |
| final List<QueryChange> actual = new ArrayList<>(); |
| while (iter.hasNext()) { |
| final ChangeLogEntry<QueryChange> entry = iter.next(); |
| actual.add(entry.getEntry()); |
| } |
| assertEquals(expected, actual); |
| } |
| |
| @Test |
| public void readFromPosition_positionStartsEnd() throws Exception { |
| write10ChangesToChangeLog(); |
| |
| // set the position to some non-0 position |
| final TopicPartition partition = new TopicPartition(topic, 0); |
| consumer.assign(Lists.newArrayList(partition)); |
| consumer.seekToEnd(Lists.newArrayList(partition)); |
| final CloseableIteration<ChangeLogEntry<QueryChange>, QueryChangeLogException> iter = changeLog.readFromPosition(10L); |
| int count = 0; |
| while (iter.hasNext()) { |
| // should be empty |
| iter.next(); |
| count++; |
| } |
| assertEquals(0, count); |
| } |
| |
| @Test |
| public void multipleClients() throws Exception { |
| // Create a second KafkaQueryChangeLog objects that connect to the same change log. |
| final Producer<?, QueryChange> producer2 = KafkaTestUtil.makeProducer(rule, StringSerializer.class, QueryChangeSerializer.class); |
| final Consumer<?, QueryChange> consumer2 = KafkaTestUtil.fromStartConsumer(rule, StringDeserializer.class, QueryChangeDeserializer.class); |
| try(final KafkaQueryChangeLog changeLog2 = new KafkaQueryChangeLog(producer2, consumer2, topic)) { |
| // Show both of them report empty. |
| assertFalse( changeLog.readFromStart().hasNext() ); |
| assertFalse( changeLog2.readFromStart().hasNext() ); |
| |
| // Write a change to the first log. |
| final QueryChange change = QueryChange.create(UUID.randomUUID(), "query", true, false); |
| changeLog.write(change); |
| |
| // Show it's in the first log. |
| assertEquals(change, changeLog.readFromStart().next().getEntry()); |
| |
| // Show it is also seen in the second log. |
| assertEquals(change, changeLog2.readFromStart().next().getEntry()); |
| } |
| } |
| |
| private List<QueryChange> write10ChangesToChangeLog() throws Exception { |
| final List<QueryChange> changes = new ArrayList<>(); |
| for (int ii = 0; ii < 10; ii++) { |
| final String sparql = "SOME QUERY HERE_" + ii; |
| final UUID uuid = UUID.randomUUID(); |
| final QueryChange newChange = QueryChange.create(uuid, sparql, true, false); |
| changeLog.write(newChange); |
| changes.add(newChange); |
| } |
| return changes; |
| } |
| } |