http://git-wip-us.apache.org/repos/asf/nifi/blob/7a451935/nifi-nar-bundles/nifi-kafka-bundle/nifi-kafka-0-10-processors/src/test/java/org/apache/nifi/processors/kafka/pubsub/ConsumeKafkaTest.java ---------------------------------------------------------------------- diff --git a/nifi-nar-bundles/nifi-kafka-bundle/nifi-kafka-0-10-processors/src/test/java/org/apache/nifi/processors/kafka/pubsub/ConsumeKafkaTest.java b/nifi-nar-bundles/nifi-kafka-bundle/nifi-kafka-0-10-processors/src/test/java/org/apache/nifi/processors/kafka/pubsub/ConsumeKafkaTest.java index a85563d..6fd9053 100644 --- a/nifi-nar-bundles/nifi-kafka-bundle/nifi-kafka-0-10-processors/src/test/java/org/apache/nifi/processors/kafka/pubsub/ConsumeKafkaTest.java +++ b/nifi-nar-bundles/nifi-kafka-bundle/nifi-kafka-0-10-processors/src/test/java/org/apache/nifi/processors/kafka/pubsub/ConsumeKafkaTest.java @@ -16,104 +16,36 @@ */ package org.apache.nifi.processors.kafka.pubsub; -import java.nio.charset.StandardCharsets; -import java.util.ArrayDeque; -import java.util.ArrayList; -import java.util.Collections; -import java.util.HashMap; -import java.util.List; -import java.util.Map; -import java.util.Queue; -import java.util.UUID; +import org.apache.kafka.clients.consumer.Consumer; import org.apache.kafka.clients.consumer.ConsumerConfig; -import org.apache.kafka.clients.consumer.ConsumerRecord; -import org.apache.kafka.clients.consumer.ConsumerRecords; -import org.apache.kafka.clients.consumer.OffsetAndMetadata; -import org.apache.kafka.common.KafkaException; -import org.apache.kafka.common.TopicPartition; import org.apache.kafka.common.serialization.ByteArrayDeserializer; import org.apache.nifi.logging.ComponentLog; -import org.apache.nifi.util.MockFlowFile; +import org.apache.nifi.processor.ProcessContext; import org.apache.nifi.util.TestRunner; import org.apache.nifi.util.TestRunners; import org.junit.Test; -import static org.junit.Assert.assertEquals; -import static org.junit.Assert.assertFalse; -import static org.junit.Assert.assertNull; import static org.junit.Assert.assertTrue; import static org.junit.Assert.fail; +import org.junit.Before; +import static org.mockito.Matchers.anyObject; +import static org.mockito.Mockito.mock; +import static org.mockito.Mockito.times; +import static org.mockito.Mockito.verify; +import static org.mockito.Mockito.verifyNoMoreInteractions; +import static org.mockito.Mockito.when; public class ConsumeKafkaTest { - static class MockConsumerPool extends ConsumerPool { - - final int actualMaxLeases; - final List<String> actualTopics; - final Map<String, String> actualKafkaProperties; - boolean throwKafkaExceptionOnPoll = false; - boolean throwKafkaExceptionOnCommit = false; - Queue<ConsumerRecords<byte[], byte[]>> nextPlannedRecordsQueue = new ArrayDeque<>(); - Map<TopicPartition, OffsetAndMetadata> nextExpectedCommitOffsets = null; - Map<TopicPartition, OffsetAndMetadata> actualCommitOffsets = null; - boolean wasConsumerLeasePoisoned = false; - boolean wasConsumerLeaseClosed = false; - boolean wasPoolClosed = false; - - public MockConsumerPool(int maxLeases, List<String> topics, Map<String, String> kafkaProperties, ComponentLog logger) { - super(maxLeases, topics, kafkaProperties, null); - actualMaxLeases = maxLeases; - actualTopics = topics; - actualKafkaProperties = kafkaProperties; - } - - @Override - public ConsumerLease obtainConsumer() { - return new ConsumerLease() { - @Override - public ConsumerRecords<byte[], byte[]> poll() { - if (throwKafkaExceptionOnPoll) { - throw new KafkaException("i planned to fail"); - } - final ConsumerRecords<byte[], byte[]> records = nextPlannedRecordsQueue.poll(); - return (records == null) ? ConsumerRecords.empty() : records; - } - - @Override - public void commitOffsets(Map<TopicPartition, OffsetAndMetadata> offsets) { - if (throwKafkaExceptionOnCommit) { - throw new KafkaException("i planned to fail"); - } - actualCommitOffsets = offsets; - } - - @Override - public void poison() { - wasConsumerLeasePoisoned = true; - } - - @Override - public void close() { - wasConsumerLeaseClosed = true; - } - }; - } - - @Override - public void close() { - wasPoolClosed = true; - } - - void resetState() { - throwKafkaExceptionOnPoll = false; - throwKafkaExceptionOnCommit = false; - nextPlannedRecordsQueue = null; - nextExpectedCommitOffsets = null; - wasConsumerLeasePoisoned = false; - wasConsumerLeaseClosed = false; - wasPoolClosed = false; - } + Consumer<byte[], byte[]> mockConsumer = null; + ConsumerLease mockLease = null; + ConsumerPool mockConsumerPool = null; + @Before + public void setup() { + mockConsumer = mock(Consumer.class); + mockLease = mock(ConsumerLease.class); + mockConsumerPool = mock(ConsumerPool.class); } @Test @@ -174,31 +106,14 @@ public class ConsumeKafkaTest { public void validateGetAllMessages() throws Exception { String groupName = "validateGetAllMessages"; - final byte[][] firstPassValues = new byte[][]{ - "Hello-1".getBytes(StandardCharsets.UTF_8), - "Hello-2".getBytes(StandardCharsets.UTF_8), - "Hello-3".getBytes(StandardCharsets.UTF_8) - }; - final ConsumerRecords<byte[], byte[]> firstRecs = createConsumerRecords("foo", 1, 1L, firstPassValues); - - final byte[][] secondPassValues = new byte[][]{ - "Hello-4".getBytes(StandardCharsets.UTF_8), - "Hello-5".getBytes(StandardCharsets.UTF_8), - "Hello-6".getBytes(StandardCharsets.UTF_8) - }; - final ConsumerRecords<byte[], byte[]> secondRecs = createConsumerRecords("bar", 1, 1L, secondPassValues); - - final List<String> expectedTopics = new ArrayList<>(); - expectedTopics.add("foo"); - expectedTopics.add("bar"); - final MockConsumerPool mockPool = new MockConsumerPool(1, expectedTopics, Collections.EMPTY_MAP, null); - mockPool.nextPlannedRecordsQueue.add(firstRecs); - mockPool.nextPlannedRecordsQueue.add(secondRecs); + when(mockConsumerPool.obtainConsumer(anyObject())).thenReturn(mockLease); + when(mockLease.continuePolling()).thenReturn(Boolean.TRUE, Boolean.TRUE, Boolean.FALSE); + when(mockLease.commit()).thenReturn(Boolean.TRUE); ConsumeKafka_0_10 proc = new ConsumeKafka_0_10() { @Override - protected ConsumerPool createConsumerPool(final int maxLeases, final List<String> topics, final Map<String, String> props, final ComponentLog log) { - return mockPool; + protected ConsumerPool createConsumerPool(final ProcessContext context, final ComponentLog log) { + return mockConsumerPool; } }; final TestRunner runner = TestRunners.newTestRunner(proc); @@ -207,69 +122,29 @@ public class ConsumeKafkaTest { runner.setProperty(ConsumeKafka_0_10.TOPICS, "foo,bar"); runner.setProperty(ConsumeKafka_0_10.GROUP_ID, groupName); runner.setProperty(ConsumeKafka_0_10.AUTO_OFFSET_RESET, ConsumeKafka_0_10.OFFSET_EARLIEST); - runner.run(1, false); - final List<MockFlowFile> flowFiles = runner.getFlowFilesForRelationship(ConsumeKafka_0_10.REL_SUCCESS); - - assertEquals(expectedTopics, mockPool.actualTopics); - - assertEquals(1, flowFiles.stream().map(ff -> new String(ff.toByteArray())).filter(content -> content.equals("Hello-1")).count()); - assertEquals(1, flowFiles.stream().map(ff -> new String(ff.toByteArray())).filter(content -> content.equals("Hello-2")).count()); - assertEquals(1, flowFiles.stream().map(ff -> new String(ff.toByteArray())).filter(content -> content.equals("Hello-3")).count()); - - if (mockPool.nextPlannedRecordsQueue.isEmpty()) { - assertEquals(1, flowFiles.stream().map(ff -> new String(ff.toByteArray())).filter(content -> content.equals("Hello-4")).count()); - assertEquals(1, flowFiles.stream().map(ff -> new String(ff.toByteArray())).filter(content -> content.equals("Hello-5")).count()); - assertEquals(1, flowFiles.stream().map(ff -> new String(ff.toByteArray())).filter(content -> content.equals("Hello-6")).count()); - assertEquals(2, mockPool.actualCommitOffsets.size()); - assertEquals(4L, mockPool.actualCommitOffsets.get(new TopicPartition("foo", 1)).offset()); - assertEquals(4L, mockPool.actualCommitOffsets.get(new TopicPartition("bar", 1)).offset()); - } else { - assertEquals(2, mockPool.actualCommitOffsets.size()); - assertEquals(4L, mockPool.actualCommitOffsets.get(new TopicPartition("foo", 1)).offset()); - } - - //asert that all consumers were closed as expected - //assert that the consumer pool was properly closed - assertFalse(mockPool.wasConsumerLeasePoisoned); - assertTrue(mockPool.wasConsumerLeaseClosed); - assertFalse(mockPool.wasPoolClosed); - runner.run(1, true); - assertFalse(mockPool.wasConsumerLeasePoisoned); - assertTrue(mockPool.wasConsumerLeaseClosed); - assertTrue(mockPool.wasPoolClosed); - + verify(mockConsumerPool, times(1)).obtainConsumer(anyObject()); + verify(mockLease, times(3)).continuePolling(); + verify(mockLease, times(2)).poll(); + verify(mockLease, times(1)).commit(); + verify(mockLease, times(1)).close(); + verifyNoMoreInteractions(mockConsumerPool); + verifyNoMoreInteractions(mockLease); } @Test - public void validateGetLotsOfMessages() throws Exception { - String groupName = "validateGetLotsOfMessages"; - - final byte[][] firstPassValues = new byte[10010][1]; - for (final byte[] value : firstPassValues) { - value[0] = 0x12; - } - final ConsumerRecords<byte[], byte[]> firstRecs = createConsumerRecords("foo", 1, 1L, firstPassValues); + public void validateGetErrorMessages() throws Exception { + String groupName = "validateGetErrorMessages"; - final byte[][] secondPassValues = new byte[][]{ - "Hello-4".getBytes(StandardCharsets.UTF_8), - "Hello-5".getBytes(StandardCharsets.UTF_8), - "Hello-6".getBytes(StandardCharsets.UTF_8) - }; - final ConsumerRecords<byte[], byte[]> secondRecs = createConsumerRecords("bar", 1, 1L, secondPassValues); - - final List<String> expectedTopics = new ArrayList<>(); - expectedTopics.add("foo"); - expectedTopics.add("bar"); - final MockConsumerPool mockPool = new MockConsumerPool(1, expectedTopics, Collections.EMPTY_MAP, null); - mockPool.nextPlannedRecordsQueue.add(firstRecs); - mockPool.nextPlannedRecordsQueue.add(secondRecs); + when(mockConsumerPool.obtainConsumer(anyObject())).thenReturn(mockLease); + when(mockLease.continuePolling()).thenReturn(true, false); + when(mockLease.commit()).thenReturn(Boolean.FALSE); ConsumeKafka_0_10 proc = new ConsumeKafka_0_10() { @Override - protected ConsumerPool createConsumerPool(final int maxLeases, final List<String> topics, final Map<String, String> props, final ComponentLog log) { - return mockPool; + protected ConsumerPool createConsumerPool(final ProcessContext context, final ComponentLog log) { + return mockConsumerPool; } }; final TestRunner runner = TestRunners.newTestRunner(proc); @@ -278,352 +153,15 @@ public class ConsumeKafkaTest { runner.setProperty(ConsumeKafka_0_10.TOPICS, "foo,bar"); runner.setProperty(ConsumeKafka_0_10.GROUP_ID, groupName); runner.setProperty(ConsumeKafka_0_10.AUTO_OFFSET_RESET, ConsumeKafka_0_10.OFFSET_EARLIEST); - runner.run(1, false); - final List<MockFlowFile> flowFiles = runner.getFlowFilesForRelationship(ConsumeKafka_0_10.REL_SUCCESS); - - assertEquals(10010, flowFiles.stream().map(ff -> ff.toByteArray()).filter(content -> content.length == 1 && content[0] == 0x12).count()); - assertEquals(1, mockPool.nextPlannedRecordsQueue.size()); - - assertEquals(1, mockPool.actualCommitOffsets.size()); - assertEquals(10011L, mockPool.actualCommitOffsets.get(new TopicPartition("foo", 1)).offset()); - - //asert that all consumers were closed as expected - //assert that the consumer pool was properly closed - assertFalse(mockPool.wasConsumerLeasePoisoned); - assertTrue(mockPool.wasConsumerLeaseClosed); - assertFalse(mockPool.wasPoolClosed); - runner.run(1, true); - assertFalse(mockPool.wasConsumerLeasePoisoned); - assertTrue(mockPool.wasConsumerLeaseClosed); - assertTrue(mockPool.wasPoolClosed); - + verify(mockConsumerPool, times(1)).obtainConsumer(anyObject()); + verify(mockLease, times(2)).continuePolling(); + verify(mockLease, times(1)).poll(); + verify(mockLease, times(1)).commit(); + verify(mockLease, times(1)).close(); + verifyNoMoreInteractions(mockConsumerPool); + verifyNoMoreInteractions(mockLease); } - @SuppressWarnings({"rawtypes", "unchecked"}) - private ConsumerRecords<byte[], byte[]> createConsumerRecords(final String topic, final int partition, final long startingOffset, final byte[][] rawRecords) { - final Map<TopicPartition, List<ConsumerRecord<byte[], byte[]>>> map = new HashMap<>(); - final TopicPartition tPart = new TopicPartition(topic, partition); - final List<ConsumerRecord<byte[], byte[]>> records = new ArrayList<>(); - long offset = startingOffset; - for (final byte[] rawRecord : rawRecords) { - final ConsumerRecord<byte[], byte[]> rec = new ConsumerRecord(topic, partition, offset++, UUID.randomUUID().toString().getBytes(), rawRecord); - records.add(rec); - } - map.put(tPart, records); - return new ConsumerRecords(map); - } - - @SuppressWarnings({"rawtypes", "unchecked"}) - private ConsumerRecords<byte[], byte[]> createConsumerRecords(final String topic, final int partition, final long startingOffset, final Map<byte[], byte[]> rawRecords) { - final Map<TopicPartition, List<ConsumerRecord<byte[], byte[]>>> map = new HashMap<>(); - final TopicPartition tPart = new TopicPartition(topic, partition); - final List<ConsumerRecord<byte[], byte[]>> records = new ArrayList<>(); - long offset = startingOffset; - - for (final Map.Entry<byte[], byte[]> entry : rawRecords.entrySet()) { - final byte[] key = entry.getKey(); - final byte[] rawRecord = entry.getValue(); - final ConsumerRecord<byte[], byte[]> rec = new ConsumerRecord(topic, partition, offset++, key, rawRecord); - records.add(rec); - } - map.put(tPart, records); - return new ConsumerRecords(map); - } - - private ConsumerRecords<byte[], byte[]> mergeRecords(final ConsumerRecords<byte[], byte[]>... records) { - final Map<TopicPartition, List<ConsumerRecord<byte[], byte[]>>> map = new HashMap<>(); - for (final ConsumerRecords<byte[], byte[]> rec : records) { - rec.partitions().stream().forEach((part) -> { - final List<ConsumerRecord<byte[], byte[]>> conRecs = rec.records(part); - if (map.get(part) != null) { - throw new IllegalStateException("already have that topic/partition in the record map"); - } - map.put(part, conRecs); - }); - } - return new ConsumerRecords<>(map); - } - - @Test - public void validateGetAllMessagesWithProvidedDemarcator() throws Exception { - String groupName = "validateGetAllMessagesWithProvidedDemarcator"; - - final byte[][] firstPassValues = new byte[][]{ - "Hello-1".getBytes(StandardCharsets.UTF_8), - "Hello-2".getBytes(StandardCharsets.UTF_8), - "Hello-3".getBytes(StandardCharsets.UTF_8) - }; - - final byte[][] secondPassValues = new byte[][]{ - "Hello-4".getBytes(StandardCharsets.UTF_8), - "Hello-5".getBytes(StandardCharsets.UTF_8), - "Hello-6".getBytes(StandardCharsets.UTF_8) - }; - final ConsumerRecords<byte[], byte[]> consumerRecs = mergeRecords( - createConsumerRecords("foo", 1, 1L, firstPassValues), - createConsumerRecords("bar", 1, 1L, secondPassValues) - ); - - final List<String> expectedTopics = new ArrayList<>(); - expectedTopics.add("foo"); - expectedTopics.add("bar"); - final MockConsumerPool mockPool = new MockConsumerPool(1, expectedTopics, Collections.EMPTY_MAP, null); - mockPool.nextPlannedRecordsQueue.add(consumerRecs); - - ConsumeKafka_0_10 proc = new ConsumeKafka_0_10() { - @Override - protected ConsumerPool createConsumerPool(final int maxLeases, final List<String> topics, final Map<String, String> props, final ComponentLog log) { - return mockPool; - } - }; - - final TestRunner runner = TestRunners.newTestRunner(proc); - runner.setValidateExpressionUsage(false); - runner.setProperty(KafkaProcessorUtils.BOOTSTRAP_SERVERS, "0.0.0.0:1234"); - runner.setProperty(ConsumeKafka_0_10.TOPICS, "foo,bar"); - runner.setProperty(ConsumeKafka_0_10.GROUP_ID, groupName); - runner.setProperty(ConsumeKafka_0_10.AUTO_OFFSET_RESET, ConsumeKafka_0_10.OFFSET_EARLIEST); - runner.setProperty(ConsumeKafka_0_10.MESSAGE_DEMARCATOR, "blah"); - - runner.run(1, false); - - final List<MockFlowFile> flowFiles = runner.getFlowFilesForRelationship(ConsumeKafka_0_10.REL_SUCCESS); - - assertEquals(2, flowFiles.size()); - - assertEquals(1, flowFiles.stream().map(ff -> new String(ff.toByteArray())).filter(content -> content.equals("Hello-1blahHello-2blahHello-3")).count()); - assertEquals(1, flowFiles.stream().map(ff -> new String(ff.toByteArray())).filter(content -> content.equals("Hello-4blahHello-5blahHello-6")).count()); - - //asert that all consumers were closed as expected - //assert that the consumer pool was properly closed - assertFalse(mockPool.wasConsumerLeasePoisoned); - assertTrue(mockPool.wasConsumerLeaseClosed); - assertFalse(mockPool.wasPoolClosed); - runner.run(1, true); - assertFalse(mockPool.wasConsumerLeasePoisoned); - assertTrue(mockPool.wasConsumerLeaseClosed); - assertTrue(mockPool.wasPoolClosed); - - assertEquals(2, mockPool.actualCommitOffsets.size()); - assertEquals(4L, mockPool.actualCommitOffsets.get(new TopicPartition("foo", 1)).offset()); - assertEquals(4L, mockPool.actualCommitOffsets.get(new TopicPartition("bar", 1)).offset()); - } - - @Test - public void validatePollException() throws Exception { - String groupName = "validatePollException"; - - final byte[][] firstPassValues = new byte[][]{ - "Hello-1".getBytes(StandardCharsets.UTF_8), - "Hello-2".getBytes(StandardCharsets.UTF_8), - "Hello-3".getBytes(StandardCharsets.UTF_8) - }; - - final ConsumerRecords<byte[], byte[]> consumerRecs = mergeRecords( - createConsumerRecords("foo", 1, 1L, firstPassValues) - ); - - final List<String> expectedTopics = new ArrayList<>(); - expectedTopics.add("foo"); - final MockConsumerPool mockPool = new MockConsumerPool(1, expectedTopics, Collections.EMPTY_MAP, null); - mockPool.nextPlannedRecordsQueue.add(consumerRecs); - mockPool.throwKafkaExceptionOnPoll = true; - - ConsumeKafka_0_10 proc = new ConsumeKafka_0_10() { - @Override - protected ConsumerPool createConsumerPool(final int maxLeases, final List<String> topics, final Map<String, String> props, final ComponentLog log) { - return mockPool; - } - }; - - final TestRunner runner = TestRunners.newTestRunner(proc); - runner.setValidateExpressionUsage(false); - runner.setProperty(KafkaProcessorUtils.BOOTSTRAP_SERVERS, "0.0.0.0:1234"); - runner.setProperty(ConsumeKafka_0_10.TOPICS, "foo"); - runner.setProperty(ConsumeKafka_0_10.GROUP_ID, groupName); - runner.setProperty(ConsumeKafka_0_10.AUTO_OFFSET_RESET, ConsumeKafka_0_10.OFFSET_EARLIEST); - runner.setProperty(ConsumeKafka_0_10.MESSAGE_DEMARCATOR, "blah"); - - runner.run(1, true); - - final List<MockFlowFile> flowFiles = runner.getFlowFilesForRelationship(ConsumeKafka_0_10.REL_SUCCESS); - - assertEquals(0, flowFiles.size()); - assertNull(null, mockPool.actualCommitOffsets); - - //asert that all consumers were closed as expected - //assert that the consumer pool was properly closed - assertTrue(mockPool.wasConsumerLeasePoisoned); - assertTrue(mockPool.wasConsumerLeaseClosed); - assertTrue(mockPool.wasPoolClosed); - } - - @Test - public void validateCommitOffsetException() throws Exception { - String groupName = "validateCommitOffsetException"; - - final byte[][] firstPassValues = new byte[][]{ - "Hello-1".getBytes(StandardCharsets.UTF_8), - "Hello-2".getBytes(StandardCharsets.UTF_8), - "Hello-3".getBytes(StandardCharsets.UTF_8) - }; - - final ConsumerRecords<byte[], byte[]> consumerRecs = mergeRecords( - createConsumerRecords("foo", 1, 1L, firstPassValues) - ); - - final List<String> expectedTopics = new ArrayList<>(); - expectedTopics.add("foo"); - final MockConsumerPool mockPool = new MockConsumerPool(1, expectedTopics, Collections.EMPTY_MAP, null); - mockPool.nextPlannedRecordsQueue.add(consumerRecs); - mockPool.throwKafkaExceptionOnCommit = true; - - ConsumeKafka_0_10 proc = new ConsumeKafka_0_10() { - @Override - protected ConsumerPool createConsumerPool(final int maxLeases, final List<String> topics, final Map<String, String> props, final ComponentLog log) { - return mockPool; - } - }; - - final TestRunner runner = TestRunners.newTestRunner(proc); - runner.setValidateExpressionUsage(false); - runner.setProperty(KafkaProcessorUtils.BOOTSTRAP_SERVERS, "0.0.0.0:1234"); - runner.setProperty(ConsumeKafka_0_10.TOPICS, "foo"); - runner.setProperty(ConsumeKafka_0_10.GROUP_ID, groupName); - runner.setProperty(ConsumeKafka_0_10.AUTO_OFFSET_RESET, ConsumeKafka_0_10.OFFSET_EARLIEST); - runner.setProperty(ConsumeKafka_0_10.MESSAGE_DEMARCATOR, "blah"); - - runner.run(1, true); - - final List<MockFlowFile> flowFiles = runner.getFlowFilesForRelationship(ConsumeKafka_0_10.REL_SUCCESS); - - assertEquals(1, flowFiles.size()); - - assertEquals(1, flowFiles.stream().map(ff -> new String(ff.toByteArray())).filter(content -> content.equals("Hello-1blahHello-2blahHello-3")).count()); - - //asert that all consumers were closed as expected - //assert that the consumer pool was properly closed - assertTrue(mockPool.wasConsumerLeasePoisoned); - assertTrue(mockPool.wasConsumerLeaseClosed); - assertTrue(mockPool.wasPoolClosed); - - assertNull(null, mockPool.actualCommitOffsets); - } - - @Test - public void validateUtf8Key() { - String groupName = "validateGetAllMessages"; - - final Map<byte[], byte[]> rawRecords = new HashMap<>(); - rawRecords.put("key1".getBytes(), "Hello-1".getBytes()); - rawRecords.put(new byte[0], "Hello-2".getBytes()); - rawRecords.put(null, "Hello-3".getBytes()); - - final ConsumerRecords<byte[], byte[]> firstRecs = createConsumerRecords("foo", 1, 1L, rawRecords); - - final List<String> expectedTopics = new ArrayList<>(); - expectedTopics.add("foo"); - expectedTopics.add("bar"); - final MockConsumerPool mockPool = new MockConsumerPool(1, expectedTopics, Collections.emptyMap(), null); - mockPool.nextPlannedRecordsQueue.add(firstRecs); - - ConsumeKafka_0_10 proc = new ConsumeKafka_0_10() { - @Override - protected ConsumerPool createConsumerPool(final int maxLeases, final List<String> topics, final Map<String, String> props, final ComponentLog log) { - return mockPool; - } - }; - final TestRunner runner = TestRunners.newTestRunner(proc); - runner.setValidateExpressionUsage(false); - runner.setProperty(KafkaProcessorUtils.BOOTSTRAP_SERVERS, "0.0.0.0:1234"); - runner.setProperty(ConsumeKafka_0_10.TOPICS, "foo,bar"); - runner.setProperty(ConsumeKafka_0_10.GROUP_ID, groupName); - runner.setProperty(ConsumeKafka_0_10.AUTO_OFFSET_RESET, ConsumeKafka_0_10.OFFSET_EARLIEST); - - runner.run(1, false); - - final List<MockFlowFile> flowFiles = runner.getFlowFilesForRelationship(ConsumeKafka_0_10.REL_SUCCESS); - - assertEquals(expectedTopics, mockPool.actualTopics); - - assertEquals(1, flowFiles.stream().map(ff -> new String(ff.toByteArray())).filter(content -> content.equals("Hello-1")).count()); - assertEquals(1, flowFiles.stream().map(ff -> new String(ff.toByteArray())).filter(content -> content.equals("Hello-2")).count()); - assertEquals(1, flowFiles.stream().map(ff -> new String(ff.toByteArray())).filter(content -> content.equals("Hello-3")).count()); - - assertEquals(1, flowFiles.stream().map(ff -> ff.getAttribute(KafkaProcessorUtils.KAFKA_KEY)).filter(key -> "key1".equals(key)).count()); - assertEquals(1, flowFiles.stream().map(ff -> ff.getAttribute(KafkaProcessorUtils.KAFKA_KEY)).filter(key -> key == null).count()); - assertEquals(1, flowFiles.stream().map(ff -> ff.getAttribute(KafkaProcessorUtils.KAFKA_KEY)).filter(key -> "".equals(key)).count()); - - - //asert that all consumers were closed as expected - //assert that the consumer pool was properly closed - assertFalse(mockPool.wasConsumerLeasePoisoned); - assertTrue(mockPool.wasConsumerLeaseClosed); - assertFalse(mockPool.wasPoolClosed); - runner.run(1, true); - assertFalse(mockPool.wasConsumerLeasePoisoned); - assertTrue(mockPool.wasConsumerLeaseClosed); - assertTrue(mockPool.wasPoolClosed); - } - - @Test - public void validateHexKey() { - String groupName = "validateGetAllMessages"; - - final Map<byte[], byte[]> rawRecords = new HashMap<>(); - rawRecords.put("key1".getBytes(), "Hello-1".getBytes()); - rawRecords.put(new byte[0], "Hello-2".getBytes()); - rawRecords.put(null, "Hello-3".getBytes()); - - final ConsumerRecords<byte[], byte[]> firstRecs = createConsumerRecords("foo", 1, 1L, rawRecords); - - final List<String> expectedTopics = new ArrayList<>(); - expectedTopics.add("foo"); - expectedTopics.add("bar"); - final MockConsumerPool mockPool = new MockConsumerPool(1, expectedTopics, Collections.emptyMap(), null); - mockPool.nextPlannedRecordsQueue.add(firstRecs); - - ConsumeKafka_0_10 proc = new ConsumeKafka_0_10() { - @Override - protected ConsumerPool createConsumerPool(final int maxLeases, final List<String> topics, final Map<String, String> props, final ComponentLog log) { - return mockPool; - } - }; - final TestRunner runner = TestRunners.newTestRunner(proc); - runner.setValidateExpressionUsage(false); - runner.setProperty(KafkaProcessorUtils.BOOTSTRAP_SERVERS, "0.0.0.0:1234"); - runner.setProperty(ConsumeKafka_0_10.TOPICS, "foo,bar"); - runner.setProperty(ConsumeKafka_0_10.GROUP_ID, groupName); - runner.setProperty(ConsumeKafka_0_10.AUTO_OFFSET_RESET, ConsumeKafka_0_10.OFFSET_EARLIEST); - runner.setProperty(ConsumeKafka_0_10.KEY_ATTRIBUTE_ENCODING, ConsumeKafka_0_10.HEX_ENCODING); - - runner.run(1, false); - - final List<MockFlowFile> flowFiles = runner.getFlowFilesForRelationship(ConsumeKafka_0_10.REL_SUCCESS); - - assertEquals(expectedTopics, mockPool.actualTopics); - - assertEquals(1, flowFiles.stream().map(ff -> new String(ff.toByteArray())).filter(content -> content.equals("Hello-1")).count()); - assertEquals(1, flowFiles.stream().map(ff -> new String(ff.toByteArray())).filter(content -> content.equals("Hello-2")).count()); - assertEquals(1, flowFiles.stream().map(ff -> new String(ff.toByteArray())).filter(content -> content.equals("Hello-3")).count()); - - final String expectedHex = (Integer.toHexString('k') + Integer.toHexString('e') + Integer.toHexString('y') + Integer.toHexString('1')).toUpperCase(); - - assertEquals(1, flowFiles.stream().map(ff -> ff.getAttribute(KafkaProcessorUtils.KAFKA_KEY)).filter(key -> expectedHex.equals(key)).count()); - assertEquals(1, flowFiles.stream().map(ff -> ff.getAttribute(KafkaProcessorUtils.KAFKA_KEY)).filter(key -> key == null).count()); - assertEquals(1, flowFiles.stream().map(ff -> ff.getAttribute(KafkaProcessorUtils.KAFKA_KEY)).filter(key -> "".equals(key)).count()); - - - //asert that all consumers were closed as expected - //assert that the consumer pool was properly closed - assertFalse(mockPool.wasConsumerLeasePoisoned); - assertTrue(mockPool.wasConsumerLeaseClosed); - assertFalse(mockPool.wasPoolClosed); - runner.run(1, true); - assertFalse(mockPool.wasConsumerLeasePoisoned); - assertTrue(mockPool.wasConsumerLeaseClosed); - assertTrue(mockPool.wasPoolClosed); - } }
http://git-wip-us.apache.org/repos/asf/nifi/blob/7a451935/nifi-nar-bundles/nifi-kafka-bundle/nifi-kafka-0-10-processors/src/test/java/org/apache/nifi/processors/kafka/pubsub/ConsumerPoolTest.java ---------------------------------------------------------------------- diff --git a/nifi-nar-bundles/nifi-kafka-bundle/nifi-kafka-0-10-processors/src/test/java/org/apache/nifi/processors/kafka/pubsub/ConsumerPoolTest.java b/nifi-nar-bundles/nifi-kafka-bundle/nifi-kafka-0-10-processors/src/test/java/org/apache/nifi/processors/kafka/pubsub/ConsumerPoolTest.java index 7f88ea2..0ebf2b3 100644 --- a/nifi-nar-bundles/nifi-kafka-bundle/nifi-kafka-0-10-processors/src/test/java/org/apache/nifi/processors/kafka/pubsub/ConsumerPoolTest.java +++ b/nifi-nar-bundles/nifi-kafka-bundle/nifi-kafka-0-10-processors/src/test/java/org/apache/nifi/processors/kafka/pubsub/ConsumerPoolTest.java @@ -16,109 +16,203 @@ */ package org.apache.nifi.processors.kafka.pubsub; +import java.nio.charset.StandardCharsets; +import java.util.ArrayList; import java.util.Collections; +import java.util.HashMap; +import java.util.List; +import java.util.Map; +import java.util.UUID; import org.apache.kafka.clients.consumer.Consumer; +import org.apache.kafka.clients.consumer.ConsumerRecord; import org.apache.kafka.clients.consumer.ConsumerRecords; import org.apache.kafka.common.KafkaException; +import org.apache.kafka.common.TopicPartition; import org.apache.nifi.logging.ComponentLog; +import org.apache.nifi.processor.ProcessSession; +import org.apache.nifi.provenance.ProvenanceReporter; import org.apache.nifi.processors.kafka.pubsub.ConsumerPool.PoolStats; import static org.junit.Assert.assertEquals; import static org.junit.Assert.fail; import org.junit.Before; import org.junit.Test; -import static org.mockito.Matchers.anyInt; +import static org.mockito.Matchers.anyLong; import static org.mockito.Mockito.mock; +import static org.mockito.Mockito.times; +import static org.mockito.Mockito.verify; import static org.mockito.Mockito.when; public class ConsumerPoolTest { Consumer<byte[], byte[]> consumer = null; + ProcessSession mockSession = null; + ProvenanceReporter mockReporter = null; + ConsumerPool testPool = null; + ConsumerPool testDemarcatedPool = null; ComponentLog logger = null; @Before public void setup() { consumer = mock(Consumer.class); logger = mock(ComponentLog.class); - } - - @Test - public void validatePoolSimpleCreateClose() throws Exception { - - final ConsumerPool testPool = new ConsumerPool(1, Collections.singletonList("nifi"), Collections.emptyMap(), logger) { + mockSession = mock(ProcessSession.class); + mockReporter = mock(ProvenanceReporter.class); + when(mockSession.getProvenanceReporter()).thenReturn(mockReporter); + testPool = new ConsumerPool( + 1, + null, + Collections.emptyMap(), + Collections.singletonList("nifi"), + 100L, + "utf-8", + "ssl", + "localhost", + logger) { @Override protected Consumer<byte[], byte[]> createKafkaConsumer() { return consumer; } }; + testDemarcatedPool = new ConsumerPool( + 1, + "--demarcator--".getBytes(StandardCharsets.UTF_8), + Collections.emptyMap(), + Collections.singletonList("nifi"), + 100L, + "utf-8", + "ssl", + "localhost", + logger) { + @Override + protected Consumer<byte[], byte[]> createKafkaConsumer() { + return consumer; + } + }; + } - when(consumer.poll(anyInt())).thenReturn(ConsumerRecords.empty()); + @Test + public void validatePoolSimpleCreateClose() throws Exception { - try (final ConsumerLease lease = testPool.obtainConsumer()) { + when(consumer.poll(anyLong())).thenReturn(createConsumerRecords("nifi", 0, 0L, new byte[][]{})); + try (final ConsumerLease lease = testPool.obtainConsumer(mockSession)) { + lease.poll(); + } + try (final ConsumerLease lease = testPool.obtainConsumer(mockSession)) { + lease.poll(); + } + try (final ConsumerLease lease = testPool.obtainConsumer(mockSession)) { + lease.poll(); + } + try (final ConsumerLease lease = testPool.obtainConsumer(mockSession)) { lease.poll(); - lease.commitOffsets(Collections.emptyMap()); } testPool.close(); + verify(mockSession, times(0)).create(); + verify(mockSession, times(0)).commit(); final PoolStats stats = testPool.getPoolStats(); assertEquals(1, stats.consumerCreatedCount); assertEquals(1, stats.consumerClosedCount); - assertEquals(1, stats.leasesObtainedCount); - assertEquals(1, stats.unproductivePollCount); - assertEquals(0, stats.productivePollCount); + assertEquals(4, stats.leasesObtainedCount); } @Test - public void validatePoolSimpleBatchCreateClose() throws Exception { - - final ConsumerPool testPool = new ConsumerPool(5, Collections.singletonList("nifi"), Collections.emptyMap(), logger) { - @Override - protected Consumer<byte[], byte[]> createKafkaConsumer() { - return consumer; - } + public void validatePoolSimpleCreatePollClose() throws Exception { + final byte[][] firstPassValues = new byte[][]{ + "Hello-1".getBytes(StandardCharsets.UTF_8), + "Hello-2".getBytes(StandardCharsets.UTF_8), + "Hello-3".getBytes(StandardCharsets.UTF_8) }; + final ConsumerRecords<byte[], byte[]> firstRecs = createConsumerRecords("foo", 1, 1L, firstPassValues); - when(consumer.poll(anyInt())).thenReturn(ConsumerRecords.empty()); + when(consumer.poll(anyLong())).thenReturn(firstRecs, createConsumerRecords("nifi", 0, 0L, new byte[][]{})); + try (final ConsumerLease lease = testPool.obtainConsumer(mockSession)) { + lease.poll(); + lease.commit(); + } + testPool.close(); + verify(mockSession, times(3)).create(); + verify(mockSession, times(1)).commit(); + final PoolStats stats = testPool.getPoolStats(); + assertEquals(1, stats.consumerCreatedCount); + assertEquals(1, stats.consumerClosedCount); + assertEquals(1, stats.leasesObtainedCount); + } + @Test + public void validatePoolSimpleBatchCreateClose() throws Exception { + when(consumer.poll(anyLong())).thenReturn(createConsumerRecords("nifi", 0, 0L, new byte[][]{})); for (int i = 0; i < 100; i++) { - try (final ConsumerLease lease = testPool.obtainConsumer()) { + try (final ConsumerLease lease = testPool.obtainConsumer(mockSession)) { for (int j = 0; j < 100; j++) { lease.poll(); } - lease.commitOffsets(Collections.emptyMap()); } } testPool.close(); + verify(mockSession, times(0)).create(); + verify(mockSession, times(0)).commit(); final PoolStats stats = testPool.getPoolStats(); assertEquals(1, stats.consumerCreatedCount); assertEquals(1, stats.consumerClosedCount); assertEquals(100, stats.leasesObtainedCount); - assertEquals(10000, stats.unproductivePollCount); - assertEquals(0, stats.productivePollCount); } @Test - public void validatePoolConsumerFails() throws Exception { - - final ConsumerPool testPool = new ConsumerPool(1, Collections.singletonList("nifi"), Collections.emptyMap(), logger) { - @Override - protected Consumer<byte[], byte[]> createKafkaConsumer() { - return consumer; - } + public void validatePoolBatchCreatePollClose() throws Exception { + final byte[][] firstPassValues = new byte[][]{ + "Hello-1".getBytes(StandardCharsets.UTF_8), + "Hello-2".getBytes(StandardCharsets.UTF_8), + "Hello-3".getBytes(StandardCharsets.UTF_8) }; + final ConsumerRecords<byte[], byte[]> firstRecs = createConsumerRecords("foo", 1, 1L, firstPassValues); - when(consumer.poll(anyInt())).thenThrow(new KafkaException()); - - try (final ConsumerLease lease = testPool.obtainConsumer()) { + when(consumer.poll(anyLong())).thenReturn(firstRecs, createConsumerRecords("nifi", 0, 0L, new byte[][]{})); + try (final ConsumerLease lease = testDemarcatedPool.obtainConsumer(mockSession)) { lease.poll(); - fail(); - } catch (final KafkaException ke) { + lease.commit(); + } + testDemarcatedPool.close(); + verify(mockSession, times(1)).create(); + verify(mockSession, times(1)).commit(); + final PoolStats stats = testDemarcatedPool.getPoolStats(); + assertEquals(1, stats.consumerCreatedCount); + assertEquals(1, stats.consumerClosedCount); + assertEquals(1, stats.leasesObtainedCount); + } + + @Test + public void validatePoolConsumerFails() throws Exception { + + when(consumer.poll(anyLong())).thenThrow(new KafkaException("oops")); + try (final ConsumerLease lease = testPool.obtainConsumer(mockSession)) { + try { + lease.poll(); + fail(); + } catch (final KafkaException ke) { + } } testPool.close(); + verify(mockSession, times(0)).create(); + verify(mockSession, times(0)).commit(); final PoolStats stats = testPool.getPoolStats(); assertEquals(1, stats.consumerCreatedCount); assertEquals(1, stats.consumerClosedCount); assertEquals(1, stats.leasesObtainedCount); - assertEquals(0, stats.unproductivePollCount); - assertEquals(0, stats.productivePollCount); } + + @SuppressWarnings({"rawtypes", "unchecked"}) + static ConsumerRecords<byte[], byte[]> createConsumerRecords(final String topic, final int partition, final long startingOffset, final byte[][] rawRecords) { + final Map<TopicPartition, List<ConsumerRecord<byte[], byte[]>>> map = new HashMap<>(); + final TopicPartition tPart = new TopicPartition(topic, partition); + final List<ConsumerRecord<byte[], byte[]>> records = new ArrayList<>(); + long offset = startingOffset; + for (final byte[] rawRecord : rawRecords) { + final ConsumerRecord<byte[], byte[]> rec = new ConsumerRecord(topic, partition, offset++, UUID.randomUUID().toString().getBytes(), rawRecord); + records.add(rec); + } + map.put(tPart, records); + return new ConsumerRecords(map); + } + } http://git-wip-us.apache.org/repos/asf/nifi/blob/7a451935/nifi-nar-bundles/nifi-kafka-bundle/nifi-kafka-0-10-processors/src/test/java/org/apache/nifi/processors/kafka/pubsub/PublishKafkaTest.java ---------------------------------------------------------------------- diff --git a/nifi-nar-bundles/nifi-kafka-bundle/nifi-kafka-0-10-processors/src/test/java/org/apache/nifi/processors/kafka/pubsub/PublishKafkaTest.java b/nifi-nar-bundles/nifi-kafka-bundle/nifi-kafka-0-10-processors/src/test/java/org/apache/nifi/processors/kafka/pubsub/PublishKafkaTest.java index af0d343..b3f1bd1 100644 --- a/nifi-nar-bundles/nifi-kafka-bundle/nifi-kafka-0-10-processors/src/test/java/org/apache/nifi/processors/kafka/pubsub/PublishKafkaTest.java +++ b/nifi-nar-bundles/nifi-kafka-bundle/nifi-kafka-0-10-processors/src/test/java/org/apache/nifi/processors/kafka/pubsub/PublishKafkaTest.java @@ -358,7 +358,7 @@ public class PublishKafkaTest { TestRunner runner = TestRunners.newTestRunner(putKafka); runner.setProperty(PublishKafka_0_10.TOPIC, topicName); runner.setProperty(KafkaProcessorUtils.BOOTSTRAP_SERVERS, "localhost:1234"); - runner.setProperty(PublishKafka_0_10.KEY_ATTRIBUTE_ENCODING, PublishKafka_0_10.HEX_ENCODING); + runner.setProperty(PublishKafka_0_10.KEY_ATTRIBUTE_ENCODING, KafkaProcessorUtils.HEX_ENCODING); runner.setProperty(PublishKafka_0_10.KEY, "${myKey}"); final Map<String, String> attributes = Collections.singletonMap("myKey", "6B657931"); http://git-wip-us.apache.org/repos/asf/nifi/blob/7a451935/nifi-nar-bundles/nifi-kafka-bundle/nifi-kafka-0-9-processors/src/main/java/org/apache/nifi/processors/kafka/pubsub/ConsumeKafka.java ---------------------------------------------------------------------- diff --git a/nifi-nar-bundles/nifi-kafka-bundle/nifi-kafka-0-9-processors/src/main/java/org/apache/nifi/processors/kafka/pubsub/ConsumeKafka.java b/nifi-nar-bundles/nifi-kafka-bundle/nifi-kafka-0-9-processors/src/main/java/org/apache/nifi/processors/kafka/pubsub/ConsumeKafka.java index 0a3fe5d..0b8a752 100644 --- a/nifi-nar-bundles/nifi-kafka-bundle/nifi-kafka-0-9-processors/src/main/java/org/apache/nifi/processors/kafka/pubsub/ConsumeKafka.java +++ b/nifi-nar-bundles/nifi-kafka-bundle/nifi-kafka-0-9-processors/src/main/java/org/apache/nifi/processors/kafka/pubsub/ConsumeKafka.java @@ -25,13 +25,8 @@ import java.util.List; import java.util.Map; import java.util.Set; import java.util.concurrent.TimeUnit; -import javax.xml.bind.DatatypeConverter; import org.apache.kafka.clients.consumer.ConsumerConfig; -import org.apache.kafka.clients.consumer.ConsumerRecord; -import org.apache.kafka.clients.consumer.ConsumerRecords; -import org.apache.kafka.clients.consumer.OffsetAndMetadata; import org.apache.kafka.common.KafkaException; -import org.apache.kafka.common.TopicPartition; import org.apache.kafka.common.serialization.ByteArrayDeserializer; import org.apache.nifi.annotation.behavior.DynamicProperty; import org.apache.nifi.annotation.behavior.InputRequirement; @@ -39,13 +34,11 @@ import org.apache.nifi.annotation.behavior.WritesAttribute; import org.apache.nifi.annotation.behavior.WritesAttributes; import org.apache.nifi.annotation.documentation.CapabilityDescription; import org.apache.nifi.annotation.documentation.Tags; -import org.apache.nifi.annotation.lifecycle.OnScheduled; import org.apache.nifi.annotation.lifecycle.OnStopped; import org.apache.nifi.components.AllowableValue; import org.apache.nifi.components.PropertyDescriptor; import org.apache.nifi.components.ValidationContext; import org.apache.nifi.components.ValidationResult; -import org.apache.nifi.flowfile.FlowFile; import org.apache.nifi.logging.ComponentLog; import org.apache.nifi.processor.AbstractProcessor; import org.apache.nifi.processor.ProcessContext; @@ -53,17 +46,18 @@ import org.apache.nifi.processor.ProcessSession; import org.apache.nifi.processor.Relationship; import org.apache.nifi.processor.exception.ProcessException; import org.apache.nifi.processor.util.StandardValidators; -import static org.apache.nifi.processors.kafka.pubsub.KafkaProcessorUtils.SECURITY_PROTOCOL; +import static org.apache.nifi.processors.kafka.pubsub.KafkaProcessorUtils.HEX_ENCODING; +import static org.apache.nifi.processors.kafka.pubsub.KafkaProcessorUtils.UTF8_ENCODING; @CapabilityDescription("Consumes messages from Apache Kafka specifically built against the Kafka 0.9 Consumer API. " + " Please note there are cases where the publisher can get into an indefinite stuck state. We are closely monitoring" + " how this evolves in the Kafka community and will take advantage of those fixes as soon as we can. In the mean time" + " it is possible to enter states where the only resolution will be to restart the JVM NiFi runs on.") -@Tags({"Kafka", "Get", "Ingest", "Ingress", "Topic", "PubSub", "Consume", "0.9.x"}) +@Tags({"Kafka", "Get", "Ingest", "Ingress", "Topic", "PubSub", "Consume", "0.9"}) @WritesAttributes({ @WritesAttribute(attribute = KafkaProcessorUtils.KAFKA_COUNT, description = "The number of messages written if more than one"), @WritesAttribute(attribute = KafkaProcessorUtils.KAFKA_KEY, description = "The key of message if present and if single message. " - + "How the key is encoded depends on the value of the 'Key Attribute Encoding' property."), + + "How the key is encoded depends on the value of the 'Key Attribute Encoding' property."), @WritesAttribute(attribute = KafkaProcessorUtils.KAFKA_OFFSET, description = "The offset of the message in the partition of the topic."), @WritesAttribute(attribute = KafkaProcessorUtils.KAFKA_PARTITION, description = "The partition of the topic the message or message bundle is from"), @WritesAttribute(attribute = KafkaProcessorUtils.KAFKA_TOPIC, description = "The topic the message or message bundle is from") @@ -75,18 +69,12 @@ import static org.apache.nifi.processors.kafka.pubsub.KafkaProcessorUtils.SECURI + " For the list of available Kafka properties please refer to: http://kafka.apache.org/documentation.html#configuration. ") public class ConsumeKafka extends AbstractProcessor { - private static final long TWO_MB = 2L * 1024L * 1024L; - static final AllowableValue OFFSET_EARLIEST = new AllowableValue("earliest", "earliest", "Automatically reset the offset to the earliest offset"); static final AllowableValue OFFSET_LATEST = new AllowableValue("latest", "latest", "Automatically reset the offset to the latest offset"); static final AllowableValue OFFSET_NONE = new AllowableValue("none", "none", "Throw exception to the consumer if no previous offset is found for the consumer's group"); - static final AllowableValue UTF8_ENCODING = new AllowableValue("utf-8", "UTF-8 Encoded", "The key is interpreted as a UTF-8 Encoded string."); - static final AllowableValue HEX_ENCODING = new AllowableValue("hex", "Hex Encoded", - "The key is interpreted as arbitrary binary data and is encoded using hexadecimal characters with uppercase letters"); - static final PropertyDescriptor TOPICS = new PropertyDescriptor.Builder() .name("topic") .displayName("Topic Name(s)") @@ -136,6 +124,7 @@ public class ConsumeKafka extends AbstractProcessor { + "will result in a single FlowFile which " + "time it is triggered. To enter special character such as 'new line' use CTRL+Enter or Shift+Enter depending on the OS") .build(); + static final PropertyDescriptor MAX_POLL_RECORDS = new PropertyDescriptor.Builder() .name("max.poll.records") .displayName("Max Poll Records") @@ -145,6 +134,20 @@ public class ConsumeKafka extends AbstractProcessor { .addValidator(StandardValidators.POSITIVE_INTEGER_VALIDATOR) .build(); + static final PropertyDescriptor MAX_UNCOMMITTED_TIME = new PropertyDescriptor.Builder() + .name("max-uncommit-offset-wait") + .displayName("Max Uncommitted Time") + .description("Specifies the maximum amount of time allowed to pass before offsets must be committed. " + + "This value impacts how often offsets will be committed. Committing offsets less often increases " + + "throughput but also increases the window of potential data duplication in the event of a rebalance " + + "or JVM restart between commits. This value is also related to maximum poll records and the use " + + "of a message demarcator. When using a message demarcator we can have far more uncommitted messages " + + "than when we're not as there is much less for us to keep track of in memory.") + .required(false) + .defaultValue("1 secs") + .addValidator(StandardValidators.TIME_PERIOD_VALIDATOR) + .build(); + static final Relationship REL_SUCCESS = new Relationship.Builder() .name("success") .description("FlowFiles received from Kafka. Depending on demarcation strategy it is a flow file per message or a bundle of messages grouped by topic and partition.") @@ -153,7 +156,6 @@ public class ConsumeKafka extends AbstractProcessor { static final List<PropertyDescriptor> DESCRIPTORS; static final Set<Relationship> RELATIONSHIPS; - private volatile byte[] demarcatorBytes = null; private volatile ConsumerPool consumerPool = null; static { @@ -165,6 +167,7 @@ public class ConsumeKafka extends AbstractProcessor { descriptors.add(KEY_ATTRIBUTE_ENCODING); descriptors.add(MESSAGE_DEMARCATOR); descriptors.add(MAX_POLL_RECORDS); + descriptors.add(MAX_UNCOMMITTED_TIME); DESCRIPTORS = Collections.unmodifiableList(descriptors); RELATIONSHIPS = Collections.singleton(REL_SUCCESS); } @@ -179,16 +182,8 @@ public class ConsumeKafka extends AbstractProcessor { return DESCRIPTORS; } - @OnScheduled - public void prepareProcessing(final ProcessContext context) { - this.demarcatorBytes = context.getProperty(MESSAGE_DEMARCATOR).isSet() - ? context.getProperty(MESSAGE_DEMARCATOR).evaluateAttributeExpressions().getValue().getBytes(StandardCharsets.UTF_8) - : null; - } - @OnStopped public void close() { - demarcatorBytes = null; final ConsumerPool pool = consumerPool; consumerPool = null; if (pool != null) { @@ -215,9 +210,21 @@ public class ConsumeKafka extends AbstractProcessor { return pool; } + return consumerPool = createConsumerPool(context, getLogger()); + } + + protected ConsumerPool createConsumerPool(final ProcessContext context, final ComponentLog log) { + final int maxLeases = context.getMaxConcurrentTasks(); + final long maxUncommittedTime = context.getProperty(MAX_UNCOMMITTED_TIME).asTimePeriod(TimeUnit.MILLISECONDS); + final byte[] demarcator = context.getProperty(ConsumeKafka.MESSAGE_DEMARCATOR).isSet() + ? context.getProperty(ConsumeKafka.MESSAGE_DEMARCATOR).evaluateAttributeExpressions().getValue().getBytes(StandardCharsets.UTF_8) + : null; final Map<String, String> props = new HashMap<>(); KafkaProcessorUtils.buildCommonKafkaProperties(context, ConsumerConfig.class, props); - final String topicListing = context.getProperty(TOPICS).evaluateAttributeExpressions().getValue(); + props.put(ConsumerConfig.ENABLE_AUTO_COMMIT_CONFIG, "false"); + props.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, ByteArrayDeserializer.class.getName()); + props.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, ByteArrayDeserializer.class.getName()); + final String topicListing = context.getProperty(ConsumeKafka.TOPICS).evaluateAttributeExpressions().getValue(); final List<String> topics = new ArrayList<>(); for (final String topic : topicListing.split(",", 100)) { final String trimmedName = topic.trim(); @@ -225,213 +232,40 @@ public class ConsumeKafka extends AbstractProcessor { topics.add(trimmedName); } } - props.put(ConsumerConfig.ENABLE_AUTO_COMMIT_CONFIG, "false"); - props.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, ByteArrayDeserializer.class.getName()); - props.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, ByteArrayDeserializer.class.getName()); - return consumerPool = createConsumerPool(context.getMaxConcurrentTasks(), topics, props, getLogger()); - } + final String keyEncoding = context.getProperty(KEY_ATTRIBUTE_ENCODING).getValue(); + final String securityProtocol = context.getProperty(KafkaProcessorUtils.SECURITY_PROTOCOL).getValue(); + final String bootstrapServers = context.getProperty(KafkaProcessorUtils.BOOTSTRAP_SERVERS).getValue(); - protected ConsumerPool createConsumerPool(final int maxLeases, final List<String> topics, final Map<String, String> props, final ComponentLog log) { - return new ConsumerPool(maxLeases, topics, props, log); + return new ConsumerPool(maxLeases, demarcator, props, topics, maxUncommittedTime, keyEncoding, securityProtocol, bootstrapServers, log); } @Override public void onTrigger(ProcessContext context, ProcessSession session) throws ProcessException { - final long startTimeNanos = System.nanoTime(); final ConsumerPool pool = getConsumerPool(context); if (pool == null) { context.yield(); return; } - final Map<TopicPartition, List<ConsumerRecord<byte[], byte[]>>> partitionRecordMap = new HashMap<>(); - - try (final ConsumerLease lease = pool.obtainConsumer()) { - try { - if (lease == null) { - context.yield(); - return; - } - final boolean foundData = gatherDataFromKafka(lease, partitionRecordMap, context); - if (!foundData) { - session.rollback(); - return; - } - - writeSessionData(context, session, partitionRecordMap, startTimeNanos); - //At-least once commit handling (if order is reversed it is at-most once) - session.commit(); - commitOffsets(lease, partitionRecordMap); - } catch (final KafkaException ke) { - lease.poison(); - getLogger().error("Problem while accessing kafka consumer " + ke, ke); + try (final ConsumerLease lease = pool.obtainConsumer(session)) { + if (lease == null) { context.yield(); - session.rollback(); - } - } - } - - private void commitOffsets(final ConsumerLease lease, final Map<TopicPartition, List<ConsumerRecord<byte[], byte[]>>> partitionRecordMap) { - final Map<TopicPartition, OffsetAndMetadata> partOffsetMap = new HashMap<>(); - partitionRecordMap.entrySet().stream() - .filter(entry -> !entry.getValue().isEmpty()) - .forEach((entry) -> { - long maxOffset = entry.getValue().stream() - .mapToLong(record -> record.offset()) - .max() - .getAsLong(); - partOffsetMap.put(entry.getKey(), new OffsetAndMetadata(maxOffset + 1L)); - }); - lease.commitOffsets(partOffsetMap); - } - - private void writeSessionData( - final ProcessContext context, final ProcessSession session, - final Map<TopicPartition, List<ConsumerRecord<byte[], byte[]>>> partitionRecordMap, - final long startTimeNanos) { - if (demarcatorBytes != null) { - partitionRecordMap.entrySet().stream() - .filter(entry -> !entry.getValue().isEmpty()) - .forEach(entry -> { - writeData(context, session, entry.getValue(), startTimeNanos); - }); - } else { - partitionRecordMap.entrySet().stream() - .filter(entry -> !entry.getValue().isEmpty()) - .flatMap(entry -> entry.getValue().stream()) - .forEach(record -> { - writeData(context, session, Collections.singletonList(record), startTimeNanos); - }); - } - } - - private String encodeKafkaKey(final byte[] key, final String encoding) { - if (key == null) { - return null; - } - - if (HEX_ENCODING.getValue().equals(encoding)) { - return DatatypeConverter.printHexBinary(key); - } else if (UTF8_ENCODING.getValue().equals(encoding)) { - return new String(key, StandardCharsets.UTF_8); - } else { - return null; // won't happen because it is guaranteed by the Allowable Values - } - } - - private void writeData(final ProcessContext context, final ProcessSession session, final List<ConsumerRecord<byte[], byte[]>> records, final long startTimeNanos) { - final ConsumerRecord<byte[], byte[]> firstRecord = records.get(0); - final String offset = String.valueOf(firstRecord.offset()); - final String keyValue = encodeKafkaKey(firstRecord.key(), context.getProperty(KEY_ATTRIBUTE_ENCODING).getValue()); - final String topic = firstRecord.topic(); - final String partition = String.valueOf(firstRecord.partition()); - FlowFile flowFile = session.create(); - flowFile = session.write(flowFile, out -> { - boolean useDemarcator = false; - for (final ConsumerRecord<byte[], byte[]> record : records) { - if (useDemarcator) { - out.write(demarcatorBytes); - } - out.write(record.value()); - useDemarcator = true; + return; } - }); - final Map<String, String> kafkaAttrs = new HashMap<>(); - kafkaAttrs.put(KafkaProcessorUtils.KAFKA_OFFSET, offset); - if (keyValue != null && records.size() == 1) { - kafkaAttrs.put(KafkaProcessorUtils.KAFKA_KEY, keyValue); - } - kafkaAttrs.put(KafkaProcessorUtils.KAFKA_PARTITION, partition); - kafkaAttrs.put(KafkaProcessorUtils.KAFKA_TOPIC, topic); - if (records.size() > 1) { - kafkaAttrs.put(KafkaProcessorUtils.KAFKA_COUNT, String.valueOf(records.size())); - } - flowFile = session.putAllAttributes(flowFile, kafkaAttrs); - final long executionDurationMillis = TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - startTimeNanos); - final String transitUri = KafkaProcessorUtils.buildTransitURI( - context.getProperty(SECURITY_PROTOCOL).getValue(), - context.getProperty(KafkaProcessorUtils.BOOTSTRAP_SERVERS).getValue(), - topic); - session.getProvenanceReporter().receive(flowFile, transitUri, executionDurationMillis); - this.getLogger().debug("Created {} containing {} messages from Kafka topic {}, partition {}, starting offset {} in {} millis", - new Object[]{flowFile, records.size(), topic, partition, offset, executionDurationMillis}); - session.transfer(flowFile, REL_SUCCESS); - } - - /** - * Populates the given partitionRecordMap with new records until we poll - * that returns no records or until we have enough data. It is important to - * ensure we keep items grouped by their topic and partition so that when we - * bundle them we bundle them intelligently and so that we can set offsets - * properly even across multiple poll calls. - */ - private boolean gatherDataFromKafka(final ConsumerLease lease, final Map<TopicPartition, List<ConsumerRecord<byte[], byte[]>>> partitionRecordMap, ProcessContext context) { - final long startNanos = System.nanoTime(); - boolean foundData = false; - ConsumerRecords<byte[], byte[]> records; - final int maxRecords = context.getProperty(MAX_POLL_RECORDS).asInteger(); - - do { - records = lease.poll(); - - for (final TopicPartition partition : records.partitions()) { - List<ConsumerRecord<byte[], byte[]>> currList = partitionRecordMap.get(partition); - if (currList == null) { - currList = new ArrayList<>(); - partitionRecordMap.put(partition, currList); + try { + while (this.isScheduled() && lease.continuePolling()) { + lease.poll(); } - currList.addAll(records.records(partition)); - if (currList.size() > 0) { - foundData = true; + if (this.isScheduled() && !lease.commit()) { + context.yield(); } + } catch (final KafkaException kex) { + getLogger().error("Exception while interacting with Kafka so will close the lease {} due to {}", + new Object[]{lease, kex}, kex); + } catch (final Throwable t) { + getLogger().error("Exception while processing data from kafka so will close the lease {} due to {}", + new Object[]{lease, t}, t); } - //If we received data and we still want to get more - } while (!records.isEmpty() && !checkIfGatheredEnoughData(partitionRecordMap, maxRecords, startNanos)); - return foundData; - } - - /** - * Determines if we have enough data as-is and should move on. - * - * @return true if we've been gathering for more than 500 ms or if we're - * demarcating and have more than 50 flowfiles worth or if we're per message - * and have more than 2000 flowfiles or if totalMessageSize is greater than - * two megabytes; false otherwise - * - * Implementation note: 500 millis and 5 MB are magic numbers. These may - * need to be tuned. They get at how often offsets will get committed to - * kafka relative to how many records will get buffered into memory in a - * poll call before writing to repos. - */ - private boolean checkIfGatheredEnoughData(final Map<TopicPartition, List<ConsumerRecord<byte[], byte[]>>> partitionRecordMap, final long maxRecords, final long startTimeNanos) { - - final long durationMillis = TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - startTimeNanos); - - if (durationMillis > 500) { - return true; - } - - int topicPartitionsFilled = 0; - int totalRecords = 0; - long totalRecordSize = 0; - - for (final List<ConsumerRecord<byte[], byte[]>> recordList : partitionRecordMap.values()) { - if (!recordList.isEmpty()) { - topicPartitionsFilled++; - } - totalRecords += recordList.size(); - for (final ConsumerRecord<byte[], byte[]> rec : recordList) { - totalRecordSize += rec.value().length; - } - } - - if (demarcatorBytes != null && demarcatorBytes.length > 0) { - return topicPartitionsFilled > 50; - } else if (totalRecordSize > TWO_MB) { - return true; - } else { - return totalRecords > maxRecords; } } - } http://git-wip-us.apache.org/repos/asf/nifi/blob/7a451935/nifi-nar-bundles/nifi-kafka-bundle/nifi-kafka-0-9-processors/src/main/java/org/apache/nifi/processors/kafka/pubsub/ConsumerLease.java ---------------------------------------------------------------------- diff --git a/nifi-nar-bundles/nifi-kafka-bundle/nifi-kafka-0-9-processors/src/main/java/org/apache/nifi/processors/kafka/pubsub/ConsumerLease.java b/nifi-nar-bundles/nifi-kafka-bundle/nifi-kafka-0-9-processors/src/main/java/org/apache/nifi/processors/kafka/pubsub/ConsumerLease.java index b954eba..5b8ba1c 100644 --- a/nifi-nar-bundles/nifi-kafka-bundle/nifi-kafka-0-9-processors/src/main/java/org/apache/nifi/processors/kafka/pubsub/ConsumerLease.java +++ b/nifi-nar-bundles/nifi-kafka-bundle/nifi-kafka-0-9-processors/src/main/java/org/apache/nifi/processors/kafka/pubsub/ConsumerLease.java @@ -17,11 +17,27 @@ package org.apache.nifi.processors.kafka.pubsub; import java.io.Closeable; +import java.nio.charset.StandardCharsets; +import java.util.ArrayList; +import java.util.Collection; +import java.util.HashMap; +import java.util.List; import java.util.Map; +import java.util.concurrent.TimeUnit; +import javax.xml.bind.DatatypeConverter; +import org.apache.kafka.clients.consumer.Consumer; +import org.apache.kafka.clients.consumer.ConsumerRebalanceListener; +import org.apache.kafka.clients.consumer.ConsumerRecord; import org.apache.kafka.clients.consumer.ConsumerRecords; import org.apache.kafka.clients.consumer.OffsetAndMetadata; import org.apache.kafka.common.KafkaException; import org.apache.kafka.common.TopicPartition; +import org.apache.nifi.flowfile.FlowFile; +import org.apache.nifi.logging.ComponentLog; +import org.apache.nifi.processor.ProcessSession; +import static org.apache.nifi.processors.kafka.pubsub.ConsumeKafka.REL_SUCCESS; +import static org.apache.nifi.processors.kafka.pubsub.KafkaProcessorUtils.HEX_ENCODING; +import static org.apache.nifi.processors.kafka.pubsub.KafkaProcessorUtils.UTF8_ENCODING; /** * This class represents a lease to access a Kafka Consumer object. The lease is @@ -30,15 +46,108 @@ import org.apache.kafka.common.TopicPartition; * the lease will be returned to the pool for future use by others. A given * lease may only belong to a single thread a time. */ -public interface ConsumerLease extends Closeable { +public abstract class ConsumerLease implements Closeable, ConsumerRebalanceListener { + + private final long maxWaitMillis; + private final Consumer<byte[], byte[]> kafkaConsumer; + private final ComponentLog logger; + private final byte[] demarcatorBytes; + private final String keyEncoding; + private final String securityProtocol; + private final String bootstrapServers; + private boolean poisoned = false; + //used for tracking demarcated flowfiles to their TopicPartition so we can append + //to them on subsequent poll calls + private final Map<TopicPartition, BundleTracker> bundleMap = new HashMap<>(); + private final Map<TopicPartition, OffsetAndMetadata> uncommittedOffsetsMap = new HashMap<>(); + private long leaseStartNanos = -1; + private boolean lastPollEmpty = false; + private int totalFlowFiles = 0; + + ConsumerLease( + final long maxWaitMillis, + final Consumer<byte[], byte[]> kafkaConsumer, + final byte[] demarcatorBytes, + final String keyEncoding, + final String securityProtocol, + final String bootstrapServers, + final ComponentLog logger) { + this.maxWaitMillis = maxWaitMillis; + this.kafkaConsumer = kafkaConsumer; + this.demarcatorBytes = demarcatorBytes; + this.keyEncoding = keyEncoding; + this.securityProtocol = securityProtocol; + this.bootstrapServers = bootstrapServers; + this.logger = logger; + } + + /** + * clears out internal state elements excluding session and consumer as + * those are managed by the pool itself + */ + private void resetInternalState() { + bundleMap.clear(); + uncommittedOffsetsMap.clear(); + leaseStartNanos = -1; + lastPollEmpty = false; + totalFlowFiles = 0; + } + + /** + * Kafka will call this method whenever it is about to rebalance the + * consumers for the given partitions. We'll simply take this to mean that + * we need to quickly commit what we've got and will return the consumer to + * the pool. This method will be called during the poll() method call of + * this class and will be called by the same thread calling poll according + * to the Kafka API docs. After this method executes the session and kafka + * offsets are committed and this lease is closed. + * + * @param partitions partitions being reassigned + */ + @Override + public void onPartitionsRevoked(final Collection<TopicPartition> partitions) { + logger.debug("Rebalance Alert: Paritions '{}' revoked for lease '{}' with consumer '{}'", new Object[]{partitions, this, kafkaConsumer}); + //force a commit here. Can reuse the session and consumer after this but must commit now to avoid duplicates if kafka reassigns parittion + commit(); + } /** - * Executes a poll on the underlying Kafka Consumer. + * This will be called by Kafka when the rebalance has completed. We don't + * need to do anything with this information other than optionally log it as + * by this point we've committed what we've got and moved on. * - * @return ConsumerRecords retrieved in the poll. - * @throws KafkaException if issue occurs talking to underlying resource. + * @param partitions topic partition set being reassigned */ - ConsumerRecords<byte[], byte[]> poll() throws KafkaException; + @Override + public void onPartitionsAssigned(final Collection<TopicPartition> partitions) { + logger.debug("Rebalance Alert: Paritions '{}' assigned for lease '{}' with consumer '{}'", new Object[]{partitions, this, kafkaConsumer}); + } + + /** + * Executes a poll on the underlying Kafka Consumer and creates any new + * flowfiles necessary or appends to existing ones if in demarcation mode. + */ + void poll() { + /** + * Implementation note: If we take too long (30 secs?) between kafka + * poll calls and our own record processing to any subsequent poll calls + * or the commit we can run into a situation where the commit will + * succeed to the session but fail on committing offsets. This is + * apparently different than the Kafka scenario of electing to rebalance + * for other reasons but in this case is due a session timeout. It + * appears Kafka KIP-62 aims to offer more control over the meaning of + * various timeouts. If we do run into this case it could result in + * duplicates. + */ + try { + final ConsumerRecords<byte[], byte[]> records = kafkaConsumer.poll(10); + lastPollEmpty = records.count() == 0; + processRecords(records); + } catch (final Throwable t) { + this.poison(); + throw t; + } + } /** * Notifies Kafka to commit the offsets for the specified topic/partition @@ -47,22 +156,244 @@ public interface ConsumerLease extends Closeable { * kafka client to collect more data from Kafka before committing the * offsets. * - * @param offsets offsets - * @throws KafkaException if issue occurs talking to underlying resource. + * if false then we didn't do anything and should probably yield if true + * then we committed new data + * + */ + boolean commit() { + if (uncommittedOffsetsMap.isEmpty()) { + resetInternalState(); + return false; + } + try { + /** + * Committing the nifi session then the offsets means we have an at + * least once guarantee here. If we reversed the order we'd have at + * most once. + */ + final Collection<FlowFile> bundledFlowFiles = getBundles(); + if (!bundledFlowFiles.isEmpty()) { + getProcessSession().transfer(bundledFlowFiles, REL_SUCCESS); + } + getProcessSession().commit(); + kafkaConsumer.commitSync(uncommittedOffsetsMap); + resetInternalState(); + return true; + } catch (final KafkaException kex) { + poison(); + logger.warn("Duplicates are likely as we were able to commit the process" + + " session but received an exception from Kafka while committing" + + " offsets."); + throw kex; + } catch (final Throwable t) { + poison(); + throw t; + } + } + + /** + * Indicates whether we should continue polling for data. If we are not + * writing data with a demarcator then we're writing individual flow files + * per kafka message therefore we must be very mindful of memory usage for + * the flow file objects (not their content) being held in memory. The + * content of kafka messages will be written to the content repository + * immediately upon each poll call but we must still be mindful of how much + * memory can be used in each poll call. We will indicate that we should + * stop polling our last poll call produced no new results or if we've + * polling and processing data longer than the specified maximum polling + * time or if we have reached out specified max flow file limit or if a + * rebalance has been initiated for one of the partitions we're watching; + * otherwise true. + * + * @return true if should keep polling; false otherwise + */ + boolean continuePolling() { + //stop if the last poll produced new no data + if (lastPollEmpty) { + return false; + } + + //stop if we've gone past our desired max uncommitted wait time + if (leaseStartNanos < 0) { + leaseStartNanos = System.nanoTime(); + } + final long durationMillis = TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - leaseStartNanos); + if (durationMillis > maxWaitMillis) { + return false; + } + + //stop if we've generated enough flowfiles that we need to be concerned about memory usage for the objects + if (bundleMap.size() > 200) { //a magic number - the number of simultaneous bundles to track + return false; + } else { + return totalFlowFiles < 15000;//admittedlly a magic number - good candidate for processor property + } + } + + /** + * Indicates that the underlying session and consumer should be immediately + * considered invalid. Once closed the session will be rolled back and the + * pool should destroy the underlying consumer. This is useful if due to + * external reasons, such as the processor no longer being scheduled, this + * lease should be terminated immediately. */ - void commitOffsets(Map<TopicPartition, OffsetAndMetadata> offsets) throws KafkaException; + private void poison() { + poisoned = true; + } /** - * Notifies that this lease is poisoned and should not be reused. + * @return true if this lease has been poisoned; false otherwise */ - void poison(); + boolean isPoisoned() { + return poisoned; + } /** - * Notifies that this lease is to be returned. The pool may optionally reuse - * this lease with another client. No further references by the caller - * should occur after calling close. + * Abstract method that is intended to be extended by the pool that created + * this ConsumerLease object. It should ensure that the session given to + * create this session is rolled back and that the underlying kafka consumer + * is either returned to the pool for continued use or destroyed if this + * lease has been poisoned. It can only be called once. Calling it more than + * once can result in undefined and non threadsafe behavior. */ @Override - void close(); + public void close() { + resetInternalState(); + } + + public abstract ProcessSession getProcessSession(); + + private void processRecords(final ConsumerRecords<byte[], byte[]> records) { + + records.partitions().stream().forEach(partition -> { + List<ConsumerRecord<byte[], byte[]>> messages = records.records(partition); + if (!messages.isEmpty()) { + //update maximum offset map for this topic partition + long maxOffset = messages.stream() + .mapToLong(record -> record.offset()) + .max() + .getAsLong(); + uncommittedOffsetsMap.put(partition, new OffsetAndMetadata(maxOffset + 1L)); + + //write records to content repository and session + if (demarcatorBytes == null) { + totalFlowFiles += messages.size(); + messages.stream().forEach(message -> { + writeData(getProcessSession(), message, partition); + }); + } else { + writeData(getProcessSession(), messages, partition); + } + } + }); + } + + private static String encodeKafkaKey(final byte[] key, final String encoding) { + if (key == null) { + return null; + } + + if (HEX_ENCODING.getValue().equals(encoding)) { + return DatatypeConverter.printHexBinary(key); + } else if (UTF8_ENCODING.getValue().equals(encoding)) { + return new String(key, StandardCharsets.UTF_8); + } else { + return null; // won't happen because it is guaranteed by the Allowable Values + } + } + + private Collection<FlowFile> getBundles() { + final List<FlowFile> flowFiles = new ArrayList<>(); + for (final BundleTracker tracker : bundleMap.values()) { + populateAttributes(tracker); + flowFiles.add(tracker.flowFile); + } + return flowFiles; + } + + private void writeData(final ProcessSession session, ConsumerRecord<byte[], byte[]> record, final TopicPartition topicPartition) { + FlowFile flowFile = session.create(); + final BundleTracker tracker = new BundleTracker(record, topicPartition, keyEncoding); + tracker.incrementRecordCount(1); + flowFile = session.write(flowFile, out -> { + out.write(record.value()); + }); + tracker.updateFlowFile(flowFile); + populateAttributes(tracker); + session.transfer(tracker.flowFile, REL_SUCCESS); + } + + private void writeData(final ProcessSession session, final List<ConsumerRecord<byte[], byte[]>> records, final TopicPartition topicPartition) { + final ConsumerRecord<byte[], byte[]> firstRecord = records.get(0); + final boolean demarcateFirstRecord; + BundleTracker tracker = bundleMap.get(topicPartition); + FlowFile flowFile; + if (tracker == null) { + tracker = new BundleTracker(firstRecord, topicPartition, keyEncoding); + flowFile = session.create(); + tracker.updateFlowFile(flowFile); + demarcateFirstRecord = false; //have not yet written records for this topic/partition in this lease + } else { + demarcateFirstRecord = true; //have already been writing records for this topic/partition in this lease + } + flowFile = tracker.flowFile; + tracker.incrementRecordCount(records.size()); + flowFile = session.append(flowFile, out -> { + boolean useDemarcator = demarcateFirstRecord; + for (final ConsumerRecord<byte[], byte[]> record : records) { + if (useDemarcator) { + out.write(demarcatorBytes); + } + out.write(record.value()); + useDemarcator = true; + } + }); + tracker.updateFlowFile(flowFile); + bundleMap.put(topicPartition, tracker); + } + + private void populateAttributes(final BundleTracker tracker) { + final Map<String, String> kafkaAttrs = new HashMap<>(); + kafkaAttrs.put(KafkaProcessorUtils.KAFKA_OFFSET, String.valueOf(tracker.initialOffset)); + if (tracker.key != null && tracker.totalRecords == 1) { + kafkaAttrs.put(KafkaProcessorUtils.KAFKA_KEY, tracker.key); + } + kafkaAttrs.put(KafkaProcessorUtils.KAFKA_PARTITION, String.valueOf(tracker.partition)); + kafkaAttrs.put(KafkaProcessorUtils.KAFKA_TOPIC, tracker.topic); + if (tracker.totalRecords > 1) { + kafkaAttrs.put(KafkaProcessorUtils.KAFKA_COUNT, String.valueOf(tracker.totalRecords)); + } + final FlowFile newFlowFile = getProcessSession().putAllAttributes(tracker.flowFile, kafkaAttrs); + final long executionDurationMillis = TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - leaseStartNanos); + final String transitUri = KafkaProcessorUtils.buildTransitURI(securityProtocol, bootstrapServers, tracker.topic); + getProcessSession().getProvenanceReporter().receive(newFlowFile, transitUri, executionDurationMillis); + tracker.updateFlowFile(newFlowFile); + } + + private static class BundleTracker { + + final long initialOffset; + final int partition; + final String topic; + final String key; + FlowFile flowFile; + long totalRecords = 0; + + private BundleTracker(final ConsumerRecord<byte[], byte[]> initialRecord, final TopicPartition topicPartition, final String keyEncoding) { + this.initialOffset = initialRecord.offset(); + this.partition = topicPartition.partition(); + this.topic = topicPartition.topic(); + this.key = encodeKafkaKey(initialRecord.key(), keyEncoding); + } + + private void incrementRecordCount(final long count) { + totalRecords += count; + } + + private void updateFlowFile(final FlowFile flowFile) { + this.flowFile = flowFile; + } + + } }
