shanthoosh commented on a change in pull request #918: SAMZA-2094: Implement
the StartpointVisitor for the KafkaSystemConsumer.
URL: https://github.com/apache/samza/pull/918#discussion_r267022260
##########
File path:
samza-kafka/src/test/java/org/apache/samza/system/kafka/TestKafkaSystemConsumer.java
##########
@@ -206,6 +225,166 @@ public void testFetchThresholdBytesDiabled() {
consumer.stop();
}
+ @Test
+ public void
testStartpointSpecificOffsetVisitorShouldUpdateTheFetchOffsetInConsumer() {
+ final KafkaConsumer consumer = Mockito.mock(KafkaConsumer.class);
+ final KafkaConsumerProxy kafkaConsumerProxy =
Mockito.mock(KafkaConsumerProxy.class);
+ KafkaSystemConsumer kafkaSystemConsumer = new
KafkaSystemConsumer(consumer, TEST_SYSTEM, new MapConfig(), TEST_CLIENT_ID,
kafkaConsumerProxy, Mockito.mock(KafkaSystemConsumerMetrics.class), new
TestClock(), REGISTRATION_HANDLER);
+ KafkaStartpointRegistrationHandler kafkaStartpointRegistrationHandler =
kafkaSystemConsumer.new KafkaStartpointRegistrationHandler();
+
+ final StartpointSpecific testStartpointSpecific = new
StartpointSpecific(TEST_OFFSET);
+
+ // Mock the consumer interactions.
+ Mockito.doNothing().when(consumer).seek(TEST_TOPIC_PARTITION,
Long.valueOf(TEST_OFFSET));
+
+ // Invoke the consumer with startpoint.
+ kafkaStartpointRegistrationHandler.visit(TEST_SYSTEM_STREAM_PARTITION,
testStartpointSpecific);
+
+ // Mock verifications.
+ Mockito.verify(consumer).seek(TEST_TOPIC_PARTITION,
Long.valueOf(TEST_OFFSET));
+
Mockito.verify(kafkaConsumerProxy).addTopicPartition(Mockito.any(SystemStreamPartition.class),
Mockito.anyLong());
+ }
+
+ @Test
+ public void
testStartpointTimestampVisitorShouldUpdateTheFetchOffsetInConsumer() {
+ // Define dummy variables for testing.
+ final Long testTimeStamp = 10L;
+
+ final KafkaConsumer consumer = Mockito.mock(KafkaConsumer.class);
+ final KafkaConsumerProxy kafkaConsumerProxy =
Mockito.mock(KafkaConsumerProxy.class);
+ KafkaSystemConsumer kafkaSystemConsumer = new
KafkaSystemConsumer(consumer, TEST_SYSTEM, new MapConfig(), TEST_CLIENT_ID,
kafkaConsumerProxy, Mockito.mock(KafkaSystemConsumerMetrics.class), new
TestClock(), REGISTRATION_HANDLER);
+
+ KafkaStartpointRegistrationHandler kafkaStartpointRegistrationHandler =
kafkaSystemConsumer.new KafkaStartpointRegistrationHandler();
+
+ final StartpointTimestamp startpointTimestamp = new
StartpointTimestamp(testTimeStamp);
+ final Map<TopicPartition, OffsetAndTimestamp> offsetForTimesResult =
ImmutableMap.of(
+ TEST_TOPIC_PARTITION, new
OffsetAndTimestamp(Long.valueOf(TEST_OFFSET), testTimeStamp));
+
+ // Mock the consumer interactions.
+
Mockito.when(consumer.offsetsForTimes(Mockito.anyMap())).thenReturn(offsetForTimesResult);
+ Mockito.doNothing().when(consumer).seek(TEST_TOPIC_PARTITION,
Long.valueOf(TEST_OFFSET));
+
+ kafkaStartpointRegistrationHandler.visit(TEST_SYSTEM_STREAM_PARTITION,
startpointTimestamp);
+
+ // Mock verifications.
+ Mockito.verify(consumer).seek(TEST_TOPIC_PARTITION,
Long.valueOf(TEST_OFFSET));
+ Mockito.verify(consumer).offsetsForTimes(Mockito.anyMap());
+
Mockito.verify(kafkaConsumerProxy).addTopicPartition(Mockito.any(SystemStreamPartition.class),
Mockito.anyLong());
+ }
+
+ @Test
+ public void
testStartpointTimestampVisitorShouldMoveTheConsumerToEndWhenTimestampDoesNotExist()
{
+ final KafkaConsumer consumer = Mockito.mock(KafkaConsumer.class);
+ final KafkaConsumerProxy kafkaConsumerProxy =
Mockito.mock(KafkaConsumerProxy.class);
+
+
+ KafkaSystemConsumer kafkaSystemConsumer = new
KafkaSystemConsumer(consumer, TEST_SYSTEM, new MapConfig(), TEST_CLIENT_ID,
kafkaConsumerProxy, Mockito.mock(KafkaSystemConsumerMetrics.class), new
TestClock(), REGISTRATION_HANDLER);
+ KafkaStartpointRegistrationHandler kafkaStartpointRegistrationHandler =
kafkaSystemConsumer.new KafkaStartpointRegistrationHandler();
+
+ final StartpointTimestamp startpointTimestamp = new
StartpointTimestamp(0L);
+ final Map<TopicPartition, OffsetAndTimestamp> offsetForTimesResult = new
HashMap<>();
+ offsetForTimesResult.put(TEST_TOPIC_PARTITION, null);
+
+ // Mock the consumer interactions.
+
Mockito.when(consumer.offsetsForTimes(Mockito.anyMap())).thenReturn(offsetForTimesResult);
+
+ kafkaStartpointRegistrationHandler.visit(TEST_SYSTEM_STREAM_PARTITION,
startpointTimestamp);
+
+ // Mock verifications.
+ Mockito.verify(consumer).seekToEnd(ImmutableList.of(TEST_TOPIC_PARTITION));
+ Mockito.verify(consumer).offsetsForTimes(Mockito.anyMap());
+
Mockito.verify(kafkaConsumerProxy).addTopicPartition(Mockito.any(SystemStreamPartition.class),
Mockito.anyLong());
+ }
+
+ @Test
+ public void
testStartpointOldestVisitorShouldUpdateTheFetchOffsetInConsumer() {
+ // Define dummy variables for testing.
+ final KafkaConsumer consumer = Mockito.mock(KafkaConsumer.class);
+ final KafkaConsumerProxy kafkaConsumerProxy =
Mockito.mock(KafkaConsumerProxy.class);
+ KafkaSystemConsumer kafkaSystemConsumer = new
KafkaSystemConsumer(consumer, TEST_SYSTEM, new MapConfig(), TEST_CLIENT_ID,
kafkaConsumerProxy, Mockito.mock(KafkaSystemConsumerMetrics.class), new
TestClock(), REGISTRATION_HANDLER);
+
+ KafkaStartpointRegistrationHandler kafkaStartpointRegistrationHandler =
kafkaSystemConsumer.new KafkaStartpointRegistrationHandler();
+
+ final StartpointOldest testStartpointSpecific = new StartpointOldest();
+
+ // Mock the consumer interactions.
+
Mockito.doNothing().when(consumer).seekToBeginning(ImmutableList.of(TEST_TOPIC_PARTITION));
+
+ // Invoke the consumer with startpoint.
+ kafkaStartpointRegistrationHandler.visit(TEST_SYSTEM_STREAM_PARTITION,
testStartpointSpecific);
+
+ // Mock verifications.
+
Mockito.verify(consumer).seekToBeginning(ImmutableList.of(TEST_TOPIC_PARTITION));
+
Mockito.verify(kafkaConsumerProxy).addTopicPartition(Mockito.any(SystemStreamPartition.class),
Mockito.anyLong());
+ }
+
+ @Test
+ public void
testStartpointUpcomingVisitorShouldUpdateTheFetchOffsetInConsumer() {
+ // Define dummy variables for testing.
+ final KafkaConsumer consumer = Mockito.mock(KafkaConsumer.class);
+ final KafkaConsumerProxy kafkaConsumerProxy =
Mockito.mock(KafkaConsumerProxy.class);
+ KafkaSystemConsumer kafkaSystemConsumer = new
KafkaSystemConsumer(consumer, TEST_SYSTEM, new MapConfig(), TEST_CLIENT_ID,
kafkaConsumerProxy, Mockito.mock(KafkaSystemConsumerMetrics.class), new
TestClock(), REGISTRATION_HANDLER);
+
+ KafkaStartpointRegistrationHandler kafkaStartpointRegistrationHandler =
kafkaSystemConsumer.new KafkaStartpointRegistrationHandler();
+
+ final StartpointUpcoming testStartpointSpecific = new StartpointUpcoming();
+
+ // Mock the consumer interactions.
+
Mockito.doNothing().when(consumer).seekToEnd(ImmutableList.of(TEST_TOPIC_PARTITION));
+
+ // Invoke the consumer with startpoint.
+ kafkaStartpointRegistrationHandler.visit(TEST_SYSTEM_STREAM_PARTITION,
testStartpointSpecific);
+
+ // Mock verifications.
+ Mockito.verify(consumer).seekToEnd(ImmutableList.of(TEST_TOPIC_PARTITION));
+
Mockito.verify(kafkaConsumerProxy).addTopicPartition(Mockito.any(SystemStreamPartition.class),
Mockito.anyLong());
+ }
+
+ @Test
+ public void
testStartInvocationAfterStartPointsRegistrationShouldInvokeTheStartPointApplyMethod()
{
+ // Initialize the constants required for the test.
+ Consumer mockConsumer = Mockito.mock(Consumer.class);
+ KafkaSystemConsumerMetrics kafkaSystemConsumerMetrics = new
KafkaSystemConsumerMetrics(TEST_SYSTEM, new NoOpMetricsRegistry());
+
+ // Test system stream partitions.
+ SystemStreamPartition testSystemStreamPartition1 = new
SystemStreamPartition(TEST_SYSTEM, TEST_STREAM, new Partition(0));
+ SystemStreamPartition testSystemStreamPartition2 = new
SystemStreamPartition(TEST_SYSTEM, TEST_STREAM, new Partition(1));
+ SystemStreamPartition testSystemStreamPartition3 = new
SystemStreamPartition(TEST_SYSTEM, TEST_STREAM, new Partition(2));
+ SystemStreamPartition testSystemStreamPartition4 = new
SystemStreamPartition(TEST_SYSTEM, TEST_STREAM, new Partition(3));
+
+ // Different kinds of {@code Startpoint}.
+ StartpointSpecific startPointSpecific = new StartpointSpecific("100");
+ StartpointTimestamp startpointTimestamp = new StartpointTimestamp(100L);
+ StartpointOldest startpointOldest = new StartpointOldest();
+ StartpointUpcoming startpointUpcoming = new StartpointUpcoming();
+
+ // Mock the visit methods of KafkaStartpointRegistrationHandler.
Review comment:
At the end of the test, it is verified that these API methods are invoked
with appropriate parameters. They're not mocked for nothing.
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