Github user srdo commented on a diff in the pull request:
https://github.com/apache/storm/pull/2152#discussion_r127538620
--- Diff:
external/storm-kafka-client/src/test/java/org/apache/storm/kafka/spout/KafkaSpoutCommitTest.java
---
@@ -0,0 +1,146 @@
+/*
+ * Copyright 2017 The Apache Software Foundation.
+ *
+ * Licensed 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.storm.kafka.spout;
+
+import static
org.apache.storm.kafka.spout.builders.SingleTopicKafkaSpoutConfiguration.getKafkaSpoutConfigBuilder;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+import static org.mockito.Matchers.*;
+import static org.mockito.Mockito.*;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import org.apache.kafka.clients.consumer.*;
+import org.apache.kafka.common.TopicPartition;
+import
org.apache.storm.kafka.spout.builders.SingleTopicKafkaSpoutConfiguration;
+import org.apache.storm.kafka.spout.internal.KafkaConsumerFactory;
+import org.apache.storm.spout.SpoutOutputCollector;
+import org.apache.storm.task.TopologyContext;
+import org.apache.storm.utils.Time;
+import org.apache.storm.utils.Time.SimulatedTime;
+import org.junit.Test;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Captor;
+import org.mockito.InOrder;
+import org.mockito.MockitoAnnotations;
+
+public class KafkaSpoutCommitTest {
+
+ private final long offsetCommitPeriodMs = 2_000;
+ private final TopologyContext contextMock =
mock(TopologyContext.class);
+ private final SpoutOutputCollector collectorMock =
mock(SpoutOutputCollector.class);
+ private final Map<String, Object> conf = new HashMap<>();
+ private final TopicPartition partition = new
TopicPartition(SingleTopicKafkaSpoutConfiguration.TOPIC, 1);
+ private KafkaConsumer<String, String> consumerMock;
+ private KafkaSpout<String, String> spout;
+ private KafkaSpoutConfig spoutConfig;
+
+ @Captor
+ private ArgumentCaptor<Map<TopicPartition, OffsetAndMetadata>>
commitCapture;
+
+ private void setupSpout(Set<TopicPartition> assignedPartitions) {
+ MockitoAnnotations.initMocks(this);
+ spoutConfig = getKafkaSpoutConfigBuilder(-1)
+ .setOffsetCommitPeriodMs(offsetCommitPeriodMs)
+ .build();
+
+ consumerMock = mock(KafkaConsumer.class);
+ KafkaConsumerFactory<String, String> consumerFactory =
(kafkaSpoutConfig) -> consumerMock;
+
+ //Set up a spout listening to 1 topic partition
+ spout = new KafkaSpout<>(spoutConfig, consumerFactory);
+
+ spout.open(conf, contextMock, collectorMock);
+ spout.activate();
+
+ ArgumentCaptor<ConsumerRebalanceListener> rebalanceListenerCapture
= ArgumentCaptor.forClass(ConsumerRebalanceListener.class);
+ verify(consumerMock).subscribe(anyCollection(),
rebalanceListenerCapture.capture());
+
+ //Assign partitions to the spout
+ ConsumerRebalanceListener consumerRebalanceListener =
rebalanceListenerCapture.getValue();
+ consumerRebalanceListener.onPartitionsAssigned(assignedPartitions);
+ }
+
+ @Test
+ public void testCommitSuccessWithOffsetVoids() {
+ //Verify that the commit logic can handle offset voids
+ try (SimulatedTime simulatedTime = new SimulatedTime()) {
+ setupSpout(Collections.singleton(partition));
+ Map<TopicPartition, List<ConsumerRecord<String, String>>>
records = new HashMap<>();
+ List<ConsumerRecord<String, String>> recordsForPartition = new
ArrayList<>();
+ // Offsets emitted are 0,1,2,3,4,...,8,9
+ for (int i = 0; i < 5; i++) {
+ recordsForPartition.add(new
ConsumerRecord(partition.topic(), partition.partition(), i, "key", "value"));
+ }
+ for (int i = 8; i < 10; i++) {
+ recordsForPartition.add(new
ConsumerRecord(partition.topic(), partition.partition(), i, "key", "value"));
+ }
+ records.put(partition, recordsForPartition);
+
+ when(consumerMock.poll(anyLong()))
+ .thenReturn(new ConsumerRecords(records));
+
+ for (int i = 0; i < recordsForPartition.size(); i++) {
+ spout.nextTuple();
+ }
+
+ ArgumentCaptor<KafkaSpoutMessageId> messageIds =
ArgumentCaptor.forClass(KafkaSpoutMessageId.class);
+ verify(collectorMock,
times(recordsForPartition.size())).emit(anyObject(), anyObject(),
messageIds.capture());
+
+ for (KafkaSpoutMessageId messageId :
messageIds.getAllValues()) {
+ spout.ack(messageId);
+ }
+
+ // Advance time and then trigger first call to kafka consumer
commit; the commit will progress till offset 4
+ Time.advanceTime(KafkaSpout.TIMER_DELAY_MS +
offsetCommitPeriodMs);
+ when(consumerMock.poll(anyLong()))
+ .thenReturn(new
ConsumerRecords<>(Collections.emptyMap()));
+ spout.nextTuple();
+
+ InOrder inOrder = inOrder(consumerMock);
+
inOrder.verify(consumerMock).commitSync(commitCapture.capture());
+ inOrder.verify(consumerMock).poll(anyLong());
+
+ //verify that Offset 4 was last committed offset
+ //the offset void should be bridged in the next commit
+ Map<TopicPartition, OffsetAndMetadata> commits =
commitCapture.getValue();
+ assertTrue(commits.containsKey(partition));
+ assertEquals(4, commits.get(partition).offset());
+
+ //Trigger second kafka consumer commit
+ reset(consumerMock);
+ when(consumerMock.poll(anyLong()))
+ .thenReturn(new
ConsumerRecords<>(Collections.emptyMap()));
+ Time.advanceTime(KafkaSpout.TIMER_DELAY_MS +
offsetCommitPeriodMs);
+ spout.nextTuple();
+
+ inOrder = inOrder(consumerMock);
+
inOrder.verify(consumerMock).commitSync(commitCapture.capture());
+ inOrder.verify(consumerMock).poll(anyLong());
--- End diff --
Same as above
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