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Posted to commits@samza.apache.org by bo...@apache.org on 2018/09/18 23:01:19 UTC
[22/47] samza git commit: added test
added test
Project: http://git-wip-us.apache.org/repos/asf/samza/repo
Commit: http://git-wip-us.apache.org/repos/asf/samza/commit/89f79829
Tree: http://git-wip-us.apache.org/repos/asf/samza/tree/89f79829
Diff: http://git-wip-us.apache.org/repos/asf/samza/diff/89f79829
Branch: refs/heads/NewKafkaSystemConsumer
Commit: 89f79829107ed21dd88058922b6038835af1cfbd
Parents: 34ae8ba
Author: Boris S <bo...@apache.org>
Authored: Thu Aug 30 10:30:55 2018 -0700
Committer: Boris S <bo...@apache.org>
Committed: Thu Aug 30 10:30:55 2018 -0700
----------------------------------------------------------------------
.../clients/consumer/KafkaConsumerConfig.java | 22 ++
.../apache/samza/system/kafka/BrokerProxy.scala | 332 -------------------
.../samza/system/kafka/KafkaConsumerProxy.java | 6 +-
.../system/kafka/KafkaSystemConsumer.scala | 309 -----------------
.../kafka/KafkaSystemConsumerMetrics.scala | 1 +
.../system/kafka/NewKafkaSystemConsumer.java | 19 +-
.../kafka/TestKafkaCheckpointManager.scala | 3 +-
.../samza/system/kafka/TestBrokerProxy.scala | 3 +
.../system/kafka/TestKafkaSystemConsumer.scala | 191 -----------
.../kafka/TestNewKafkaSystemConsumer.java | 203 ++++++++++++
10 files changed, 237 insertions(+), 852 deletions(-)
----------------------------------------------------------------------
http://git-wip-us.apache.org/repos/asf/samza/blob/89f79829/samza-kafka/src/main/scala/org/apache/kafka/clients/consumer/KafkaConsumerConfig.java
----------------------------------------------------------------------
diff --git a/samza-kafka/src/main/scala/org/apache/kafka/clients/consumer/KafkaConsumerConfig.java b/samza-kafka/src/main/scala/org/apache/kafka/clients/consumer/KafkaConsumerConfig.java
index b29a041..88437ee 100644
--- a/samza-kafka/src/main/scala/org/apache/kafka/clients/consumer/KafkaConsumerConfig.java
+++ b/samza-kafka/src/main/scala/org/apache/kafka/clients/consumer/KafkaConsumerConfig.java
@@ -23,9 +23,14 @@ package org.apache.kafka.clients.consumer;
import java.util.Map;
import java.util.Properties;
+import org.apache.commons.lang3.StringUtils;
+import org.apache.kafka.common.serialization.ByteArrayDeserializer;
+import org.apache.samza.SamzaException;
import org.apache.samza.config.Config;
import org.apache.samza.config.ConfigException;
import org.apache.samza.config.JobConfig;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
import scala.Option;
@@ -34,6 +39,8 @@ import scala.Option;
*/
public class KafkaConsumerConfig extends ConsumerConfig {
+ public static final Logger LOG = LoggerFactory.getLogger(KafkaConsumerConfig.class);
+
private static final String PRODUCER_CLIENT_ID_PREFIX = "kafka-producer";
private static final String CONSUMER_CLIENT_ID_PREFIX = "kafka-consumer";
private static final String SAMZA_OFFSET_LARGEST = "largest";
@@ -76,6 +83,9 @@ public class KafkaConsumerConfig extends ConsumerConfig {
if (! subConf.containsKey(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG)) {
// get it from the producer config
String bootstrapServer = config.get(String.format("systems.%s.producer.%s", systemName, ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG));
+ if (StringUtils.isEmpty(bootstrapServer)) {
+ throw new SamzaException("Missing " + ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG + " config for " + systemName);
+ }
consumerProps.setProperty(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, bootstrapServer);
}
@@ -85,6 +95,18 @@ public class KafkaConsumerConfig extends ConsumerConfig {
RangeAssignor.class.getName());
+ // the consumer is fully typed, and deserialization can be too. But in case it is not provided we should
+ // default to byte[]
+ if ( !config.containsKey(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG)) {
+ LOG.info("default key serialization for the consumer(for {}) to ByteArrayDeserializer", systemName);
+ consumerProps.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, ByteArrayDeserializer.class.getName());
+ }
+ if ( !config.containsKey(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG)) {
+ LOG.info("default value serialization for the consumer(for {}) to ByteArrayDeserializer", systemName);
+ consumerProps.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, ByteArrayDeserializer.class.getName());
+ }
+
+
// NOT SURE THIS IS NEEDED TODO
String maxPollRecords = subConf.get(ConsumerConfig.MAX_POLL_RECORDS_CONFIG, KAFKA_CONSUMER_MAX_POLL_RECORDS_DEFAULT);;
consumerProps.setProperty(ConsumerConfig.MAX_POLL_RECORDS_CONFIG, maxPollRecords);
http://git-wip-us.apache.org/repos/asf/samza/blob/89f79829/samza-kafka/src/main/scala/org/apache/samza/system/kafka/BrokerProxy.scala
----------------------------------------------------------------------
diff --git a/samza-kafka/src/main/scala/org/apache/samza/system/kafka/BrokerProxy.scala b/samza-kafka/src/main/scala/org/apache/samza/system/kafka/BrokerProxy.scala
deleted file mode 100644
index 423b68a..0000000
--- a/samza-kafka/src/main/scala/org/apache/samza/system/kafka/BrokerProxy.scala
+++ /dev/null
@@ -1,332 +0,0 @@
-/*
- *
- * 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.samza.system.kafka
-
-import java.lang.Thread.UncaughtExceptionHandler
-import java.nio.channels.ClosedByInterruptException
-import java.util.concurrent.{ConcurrentHashMap, CountDownLatch}
-
-import kafka.api._
-import kafka.common.{ErrorMapping, NotLeaderForPartitionException, TopicAndPartition, UnknownTopicOrPartitionException}
-import kafka.consumer.ConsumerConfig
-import kafka.message.MessageSet
-import org.apache.samza.SamzaException
-import org.apache.samza.util.ExponentialSleepStrategy
-import org.apache.samza.util.KafkaUtil
-import org.apache.samza.util.Logging
-
-import scala.collection.JavaConverters._
-import scala.collection.concurrent
-
-/**
- * A BrokerProxy consolidates Kafka fetches meant for a particular broker and retrieves them all at once, providing
- * a way for consumers to retrieve those messages by topic and partition.
- */
-class BrokerProxy(
- val host: String,
- val port: Int,
- val system: String,
- val clientID: String,
- val metrics: KafkaSystemConsumerMetrics,
- val messageSink: MessageSink,
- val timeout: Int = ConsumerConfig.SocketTimeout,
- val bufferSize: Int = ConsumerConfig.SocketBufferSize,
- val fetchSize: StreamFetchSizes = new StreamFetchSizes,
- val consumerMinSize:Int = ConsumerConfig.MinFetchBytes,
- val consumerMaxWait:Int = ConsumerConfig.MaxFetchWaitMs,
- offsetGetter: GetOffset = new GetOffset("fail")) extends Toss with Logging {
-
- /**
- * How long should the fetcher thread sleep before checking if any TopicPartitions has been added to its purview
- */
- val sleepMSWhileNoTopicPartitions = 100
-
- /** What's the next offset for a particular partition? **/
- val nextOffsets:concurrent.Map[TopicAndPartition, Long] = new ConcurrentHashMap[TopicAndPartition, Long]().asScala
-
- /** Block on the first call to get message if the fetcher has not yet returned its initial results **/
- // TODO: It should be sufficient to just use the count down latch and await on it for each of the calls, but
- // VisualVM was showing the consumer thread spending all its time in the await method rather than returning
- // immediately, even though the process was proceeding normally. Hence the extra boolean. Should be investigated.
- val firstCallBarrier = new CountDownLatch(1)
- var firstCall = true
-
- var simpleConsumer = createSimpleConsumer()
-
- metrics.registerBrokerProxy(host, port)
-
- def createSimpleConsumer() = {
- val hostString = "%s:%d" format (host, port)
- info("Creating new SimpleConsumer for host %s for system %s" format (hostString, system))
-
- val sc = new DefaultFetchSimpleConsumer(host, port, timeout, bufferSize, clientID, fetchSize, consumerMinSize, consumerMaxWait)
- sc
- }
-
- def addTopicPartition(tp: TopicAndPartition, nextOffset: Option[String]) = {
- debug("Adding new topic and partition %s to queue for %s" format (tp, host))
-
- if (nextOffsets.asJava.containsKey(tp)) {
- toss("Already consuming TopicPartition %s" format tp)
- }
-
- val offset = if (nextOffset.isDefined && offsetGetter.isValidOffset(simpleConsumer, tp, nextOffset.get)) {
- nextOffset
- .get
- .toLong
- } else {
- warn("It appears that we received an invalid or empty offset %s for %s. Attempting to use Kafka's auto.offset.reset setting. This can result in data loss if processing continues." format (nextOffset, tp))
-
- offsetGetter.getResetOffset(simpleConsumer, tp)
- }
-
- debug("Got offset %s for new topic and partition %s." format (offset, tp))
-
- nextOffsets += tp -> offset
-
- metrics.topicPartitions.get((host, port)).set(nextOffsets.size)
- }
-
- def removeTopicPartition(tp: TopicAndPartition) = {
- if (nextOffsets.asJava.containsKey(tp)) {
- val offset = nextOffsets.remove(tp)
- metrics.topicPartitions.get((host, port)).set(nextOffsets.size)
- debug("Removed %s" format tp)
- offset
- } else {
- warn("Asked to remove topic and partition %s, but not in map (keys = %s)" format (tp, nextOffsets.keys.mkString(",")))
- None
- }
- }
-
- val thread = new Thread(new Runnable {
- def run {
- var reconnect = false
-
- try {
- (new ExponentialSleepStrategy).run(
- loop => {
- if (reconnect) {
- metrics.reconnects.get((host, port)).inc
- simpleConsumer.close()
- simpleConsumer = createSimpleConsumer()
- }
-
- while (!Thread.currentThread.isInterrupted) {
- messageSink.refreshDropped
- if (nextOffsets.size == 0) {
- debug("No TopicPartitions to fetch. Sleeping.")
- Thread.sleep(sleepMSWhileNoTopicPartitions)
- } else {
- fetchMessages
-
- // If we got here, fetchMessages didn't throw an exception, i.e. it was successful.
- // In that case, reset the loop delay, so that the next time an error occurs,
- // we start with a short retry delay.
- loop.reset
- }
- }
- },
-
- (exception, loop) => {
- warn("Restarting consumer due to %s. Releasing ownership of all partitions, and restarting consumer. Turn on debugging to get a full stack trace." format exception)
- debug("Exception detail:", exception)
- abdicateAll
- reconnect = true
- })
- } catch {
- case e: InterruptedException => info("Got interrupt exception in broker proxy thread.")
- case e: ClosedByInterruptException => info("Got closed by interrupt exception in broker proxy thread.")
- case e: OutOfMemoryError => throw new SamzaException("Got out of memory error in broker proxy thread.")
- case e: StackOverflowError => throw new SamzaException("Got stack overflow error in broker proxy thread.")
- }
-
- if (Thread.currentThread.isInterrupted) info("Shutting down due to interrupt.")
- }
- }, "BrokerProxy thread pointed at %s:%d for client %s" format (host, port, clientID))
-
- private def fetchMessages(): Unit = {
- val topicAndPartitionsToFetch = nextOffsets.filterKeys(messageSink.needsMoreMessages(_)).toList
-
- if (topicAndPartitionsToFetch.size > 0) {
- metrics.brokerReads.get((host, port)).inc
- val response: FetchResponse = simpleConsumer.defaultFetch(topicAndPartitionsToFetch: _*)
- firstCall = false
- firstCallBarrier.countDown()
-
- // Split response into errors and non errors, processing the errors first
- val (nonErrorResponses, errorResponses) = response.data.toSet.partition(_._2.error.code() == ErrorMapping.NoError)
-
- handleErrors(errorResponses, response)
-
- nonErrorResponses.foreach { case (tp, data) => moveMessagesToTheirQueue(tp, data) }
- } else {
- refreshLatencyMetrics
-
- debug("No topic/partitions need to be fetched for %s:%s right now. Sleeping %sms." format (host, port, sleepMSWhileNoTopicPartitions))
-
- metrics.brokerSkippedFetchRequests.get((host, port)).inc
-
- Thread.sleep(sleepMSWhileNoTopicPartitions)
- }
- }
-
- /**
- * Releases ownership for a single TopicAndPartition. The
- * KafkaSystemConsumer will try and find a new broker for the
- * TopicAndPartition.
- */
- def abdicate(tp: TopicAndPartition) = removeTopicPartition(tp) match {
- // Need to be mindful of a tp that was removed by another thread
- case Some(offset) => messageSink.abdicate(tp, offset)
- case None => warn("Tried to abdicate for topic partition not in map. Removed in interim?")
- }
-
- /**
- * Releases all TopicAndPartition ownership for this BrokerProxy thread. The
- * KafkaSystemConsumer will try and find a new broker for the
- * TopicAndPartition.
- */
- def abdicateAll {
- info("Abdicating all topic partitions.")
- val immutableNextOffsetsCopy = nextOffsets.toMap
- immutableNextOffsetsCopy.keySet.foreach(abdicate(_))
- }
-
- def handleErrors(errorResponses: Set[(TopicAndPartition, FetchResponsePartitionData)], response: FetchResponse) = {
- // FetchResponse should really return Option and a list of the errors so we don't have to find them ourselves
- case class Error(tp: TopicAndPartition, code: Short, exception: Exception)
-
- // Now subdivide the errors into three types: non-recoverable, not leader (== abdicate) and offset out of range (== get new offset)
-
- // Convert FetchResponse into easier-to-work-with Errors
- val errors = for (
- (topicAndPartition, responseData) <- errorResponses;
- error <- Option(response.error(topicAndPartition.topic, topicAndPartition.partition)) // Scala's being cranky about referring to error.getKey values...
- ) yield new Error(topicAndPartition, error.code(), error.exception())
-
- val (notLeaderOrUnknownTopic, otherErrors) = errors.partition { case (e) => e.code == ErrorMapping.NotLeaderForPartitionCode || e.code == ErrorMapping.UnknownTopicOrPartitionCode }
- val (offsetOutOfRangeErrors, remainingErrors) = otherErrors.partition(_.code == ErrorMapping.OffsetOutOfRangeCode)
-
- // Can recover from two types of errors: not leader (go find the new leader) and offset out of range (go get the new offset)
- // However, we want to bail as quickly as possible if there are non recoverable errors so that the state of the other
- // topic-partitions remains the same. That way, when we've rebuilt the simple consumer, we can come around and
- // handle the recoverable errors.
- remainingErrors.foreach(e => {
- warn("Got non-recoverable error codes during multifetch. Throwing an exception to trigger reconnect. Errors: %s" format remainingErrors.mkString(","))
- KafkaUtil.maybeThrowException(e.exception) })
-
- notLeaderOrUnknownTopic.foreach(e => {
- warn("Received (UnknownTopicOr|NotLeaderFor)Partition exception %s for %s. Abdicating" format(e.code, e.tp))
- abdicate(e.tp)
- })
-
- offsetOutOfRangeErrors.foreach(e => {
- warn("Received OffsetOutOfRange exception for %s. Current offset = %s" format (e.tp, nextOffsets.getOrElse(e.tp, "not found in map, likely removed in the interim")))
-
- try {
- val newOffset = offsetGetter.getResetOffset(simpleConsumer, e.tp)
- // Put the new offset into the map (if the tp still exists). Will catch it on the next go-around
- nextOffsets.replace(e.tp, newOffset)
- } catch {
- // UnknownTopic or NotLeader are routine events and handled via abdication. All others, bail.
- case _ @ (_:UnknownTopicOrPartitionException | _: NotLeaderForPartitionException) => warn("Received (UnknownTopicOr|NotLeaderFor)Partition exception %s for %s. Abdicating" format(e.code, e.tp))
- abdicate(e.tp)
- }
- })
- }
-
- def moveMessagesToTheirQueue(tp: TopicAndPartition, data: FetchResponsePartitionData) = {
- val messageSet: MessageSet = data.messages
- var nextOffset = nextOffsets(tp)
-
- messageSink.setIsAtHighWatermark(tp, data.hw == 0 || data.hw == nextOffset)
- require(messageSet != null)
- for (message <- messageSet.iterator) {
- messageSink.addMessage(tp, message, data.hw) // TODO: Verify this is correct
-
- nextOffset = message.nextOffset
-
- val bytesSize = message.message.payloadSize + message.message.keySize
- metrics.reads.get(tp).inc
- metrics.bytesRead.get(tp).inc(bytesSize)
- metrics.brokerBytesRead.get((host, port)).inc(bytesSize)
- metrics.offsets.get(tp).set(nextOffset)
- }
-
- nextOffsets.replace(tp, nextOffset) // use replace rather than put in case this tp was removed while we were fetching.
-
- // Update high water mark
- val hw = data.hw
- if (hw >= 0) {
- metrics.highWatermark.get(tp).set(hw)
- metrics.lag.get(tp).set(hw - nextOffset)
- } else {
- debug("Got a high water mark less than 0 (%d) for %s, so skipping." format (hw, tp))
- }
- }
- override def toString() = "BrokerProxy for %s:%d" format (host, port)
-
- def start {
- if (!thread.isAlive) {
- info("Starting " + toString)
- thread.setDaemon(true)
- thread.setName("Samza BrokerProxy " + thread.getName)
- thread.setUncaughtExceptionHandler(new UncaughtExceptionHandler {
- override def uncaughtException(t: Thread, e: Throwable) = error("Uncaught exception in broker proxy:", e)
- })
- thread.start
- } else {
- debug("Tried to start an already started broker proxy (%s). Ignoring." format toString)
- }
- }
-
- def stop {
- info("Shutting down " + toString)
-
- if (simpleConsumer != null) {
- info("closing simple consumer...")
- simpleConsumer.close
- }
-
- thread.interrupt
- thread.join
- }
-
- private def refreshLatencyMetrics {
- nextOffsets.foreach{
- case (topicAndPartition, offset) => {
- val latestOffset = simpleConsumer.earliestOrLatestOffset(topicAndPartition, -1, Request.OrdinaryConsumerId)
- trace("latest offset of %s is %s" format (topicAndPartition, latestOffset))
- if (latestOffset >= 0) {
- // only update the registered topicAndpartitions
- if(metrics.highWatermark.containsKey(topicAndPartition)) {
- metrics.highWatermark.get(topicAndPartition).set(latestOffset)
- }
- if(metrics.lag.containsKey(topicAndPartition)) {
- metrics.lag.get(topicAndPartition).set(latestOffset - offset)
- }
- }
- }
- }
- }
-}
http://git-wip-us.apache.org/repos/asf/samza/blob/89f79829/samza-kafka/src/main/scala/org/apache/samza/system/kafka/KafkaConsumerProxy.java
----------------------------------------------------------------------
diff --git a/samza-kafka/src/main/scala/org/apache/samza/system/kafka/KafkaConsumerProxy.java b/samza-kafka/src/main/scala/org/apache/samza/system/kafka/KafkaConsumerProxy.java
index 01b345a..e61e0ff 100644
--- a/samza-kafka/src/main/scala/org/apache/samza/system/kafka/KafkaConsumerProxy.java
+++ b/samza-kafka/src/main/scala/org/apache/samza/system/kafka/KafkaConsumerProxy.java
@@ -47,8 +47,8 @@ import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
- * Separate thread that reads messages from kafka and puts them int the BlockingEnvelopeMap
- * This class is not thread safe. There will be only one instance of this class per LiKafkaSystemConsumer object
+ * Separate thread that reads messages from kafka and puts them into the BlockingEnvelopeMap.
+ * This class is not thread safe. There will be only one instance of this class per LiKafkaSystemConsumer object.
* We still need some synchronization around kafkaConsumer. See pollConsumer() method for details.
*/
public class KafkaConsumerProxy<K, V> {
@@ -65,7 +65,7 @@ public class KafkaConsumerProxy<K, V> {
private final String clientId;
private final Map<TopicPartition, SystemStreamPartition> topicPartitions2SSP = new HashMap<>();
private final Map<SystemStreamPartition, MetricName> ssp2MetricName = new HashMap<>();
- // list of all the SSPs we poll from with their next offsets correspondingly.
+ // list of all the SSPs we poll from, with their next offsets correspondingly.
private final Map<SystemStreamPartition, Long> nextOffsets = new ConcurrentHashMap<>();
// lags behind the high water mark, as reported by the Kafka consumer.
private final Map<SystemStreamPartition, Long> latestLags = new HashMap<>();
http://git-wip-us.apache.org/repos/asf/samza/blob/89f79829/samza-kafka/src/main/scala/org/apache/samza/system/kafka/KafkaSystemConsumer.scala
----------------------------------------------------------------------
diff --git a/samza-kafka/src/main/scala/org/apache/samza/system/kafka/KafkaSystemConsumer.scala b/samza-kafka/src/main/scala/org/apache/samza/system/kafka/KafkaSystemConsumer.scala
deleted file mode 100644
index fd84c4a..0000000
--- a/samza-kafka/src/main/scala/org/apache/samza/system/kafka/KafkaSystemConsumer.scala
+++ /dev/null
@@ -1,309 +0,0 @@
-/*
- * 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.samza.system.kafka
-
-import kafka.common.TopicAndPartition
-import org.apache.samza.util.Logging
-import kafka.message.Message
-import kafka.message.MessageAndOffset
-import org.apache.samza.Partition
-import org.apache.kafka.common.utils.Utils
-import org.apache.samza.util.Clock
-import kafka.serializer.DefaultDecoder
-import kafka.serializer.Decoder
-import org.apache.samza.util.BlockingEnvelopeMap
-import org.apache.samza.system.SystemStreamPartition
-import org.apache.samza.system.IncomingMessageEnvelope
-import kafka.consumer.ConsumerConfig
-import org.apache.samza.util.TopicMetadataStore
-import kafka.api.PartitionMetadata
-import kafka.api.TopicMetadata
-import org.apache.samza.util.ExponentialSleepStrategy
-import java.util.concurrent.ConcurrentHashMap
-import scala.collection.JavaConverters._
-import org.apache.samza.system.SystemAdmin
-
-object KafkaSystemConsumer {
-
- // Approximate additional shallow heap overhead per message in addition to the raw bytes
- // received from Kafka 4 + 64 + 4 + 4 + 4 = 80 bytes overhead.
- // As this overhead is a moving target, and not very large
- // compared to the message size its being ignore in the computation for now.
- val MESSAGE_SIZE_OVERHEAD = 4 + 64 + 4 + 4 + 4;
-
- def toTopicAndPartition(systemStreamPartition: SystemStreamPartition) = {
- val topic = systemStreamPartition.getStream
- val partitionId = systemStreamPartition.getPartition.getPartitionId
- TopicAndPartition(topic, partitionId)
- }
-}
-
-/**
- * Maintain a cache of BrokerProxies, returning the appropriate one for the
- * requested topic and partition.
- */
-private[kafka] class KafkaSystemConsumer(
- systemName: String,
- systemAdmin: SystemAdmin,
- metrics: KafkaSystemConsumerMetrics,
- metadataStore: TopicMetadataStore,
- clientId: String,
- timeout: Int = ConsumerConfig.ConsumerTimeoutMs,
- bufferSize: Int = ConsumerConfig.SocketBufferSize,
- fetchSize: StreamFetchSizes = new StreamFetchSizes,
- consumerMinSize: Int = ConsumerConfig.MinFetchBytes,
- consumerMaxWait: Int = ConsumerConfig.MaxFetchWaitMs,
-
- /**
- * Defines a low water mark for how many messages we buffer before we start
- * executing fetch requests against brokers to get more messages. This value
- * is divided equally among all registered SystemStreamPartitions. For
- * example, if fetchThreshold is set to 50000, and there are 50
- * SystemStreamPartitions registered, then the per-partition threshold is
- * 1000. As soon as a SystemStreamPartition's buffered message count drops
- * below 1000, a fetch request will be executed to get more data for it.
- *
- * Increasing this parameter will decrease the latency between when a queue
- * is drained of messages and when new messages are enqueued, but also leads
- * to an increase in memory usage since more messages will be held in memory.
- */
- fetchThreshold: Int = 50000,
- /**
- * Defines a low water mark for how many bytes we buffer before we start
- * executing fetch requests against brokers to get more messages. This
- * value is divided by 2 because the messages are buffered twice, once in
- * KafkaConsumer and then in SystemConsumers. This value
- * is divided equally among all registered SystemStreamPartitions.
- * However this is a soft limit per partition, as the
- * bytes are cached at the message boundaries, and the actual usage can be
- * 1000 bytes + size of max message in the partition for a given stream.
- * The bytes if the size of the bytebuffer in Message. Hence, the
- * Object overhead is not taken into consideration. In this codebase
- * it seems to be quite small. Hence, even for 500000 messages this is around 4MB x 2 = 8MB,
- * which is not considerable.
- *
- * For example,
- * if fetchThresholdBytes is set to 100000 bytes, and there are 50
- * SystemStreamPartitions registered, then the per-partition threshold is
- * (100000 / 2) / 50 = 1000 bytes.
- * As this is a soft limit, the actual usage can be 1000 bytes + size of max message.
- * As soon as a SystemStreamPartition's buffered messages bytes drops
- * below 1000, a fetch request will be executed to get more data for it.
- *
- * Increasing this parameter will decrease the latency between when a queue
- * is drained of messages and when new messages are enqueued, but also leads
- * to an increase in memory usage since more messages will be held in memory.
- *
- * The default value is -1, which means this is not used. When the value
- * is > 0, then the fetchThreshold which is count based is ignored.
- */
- fetchThresholdBytes: Long = -1,
- /**
- * if(fetchThresholdBytes > 0) true else false
- */
- fetchLimitByBytesEnabled: Boolean = false,
- offsetGetter: GetOffset = new GetOffset("fail"),
- deserializer: Decoder[Object] = new DefaultDecoder().asInstanceOf[Decoder[Object]],
- keyDeserializer: Decoder[Object] = new DefaultDecoder().asInstanceOf[Decoder[Object]],
- retryBackoff: ExponentialSleepStrategy = new ExponentialSleepStrategy,
- clock: () => Long = { System.currentTimeMillis }) extends BlockingEnvelopeMap(
- metrics.registry,
- new Clock {
- def currentTimeMillis = clock()
- },
- classOf[KafkaSystemConsumerMetrics].getName) with Toss with Logging {
-
- type HostPort = (String, Int)
- val brokerProxies = scala.collection.mutable.Map[HostPort, BrokerProxy]()
- val topicPartitionsAndOffsets: scala.collection.concurrent.Map[TopicAndPartition, String] = new ConcurrentHashMap[TopicAndPartition, String]().asScala
- var perPartitionFetchThreshold = fetchThreshold
- var perPartitionFetchThresholdBytes = 0L
-
- def start() {
- if (topicPartitionsAndOffsets.size > 0) {
- perPartitionFetchThreshold = fetchThreshold / topicPartitionsAndOffsets.size
- // messages get double buffered, hence divide by 2
- if(fetchLimitByBytesEnabled) {
- perPartitionFetchThresholdBytes = (fetchThresholdBytes / 2) / topicPartitionsAndOffsets.size
- }
- }
-
- systemAdmin.start()
- refreshBrokers
- }
-
- override def register(systemStreamPartition: SystemStreamPartition, offset: String) {
- super.register(systemStreamPartition, offset)
-
- val topicAndPartition = KafkaSystemConsumer.toTopicAndPartition(systemStreamPartition)
- val existingOffset = topicPartitionsAndOffsets.getOrElseUpdate(topicAndPartition, offset)
- // register the older offset in the consumer
- if (systemAdmin.offsetComparator(existingOffset, offset) >= 0) {
- topicPartitionsAndOffsets.replace(topicAndPartition, offset)
- }
-
- metrics.registerTopicAndPartition(KafkaSystemConsumer.toTopicAndPartition(systemStreamPartition))
- }
-
- def stop() {
- systemAdmin.stop()
- brokerProxies.values.foreach(_.stop)
- }
-
- protected def createBrokerProxy(host: String, port: Int): BrokerProxy = {
- info("Creating new broker proxy for host: %s and port: %s" format(host, port))
- new BrokerProxy(host, port, systemName, clientId, metrics, sink, timeout, bufferSize, fetchSize, consumerMinSize, consumerMaxWait, offsetGetter)
- }
-
- protected def getPartitionMetadata(topicMetadata: TopicMetadata, partition: Int): Option[PartitionMetadata] = {
- topicMetadata.partitionsMetadata.find(_.partitionId == partition)
- }
-
- protected def getLeaderHostPort(partitionMetadata: Option[PartitionMetadata]): Option[(String, Int)] = {
- // Whatever we do, we can't say Broker, even though we're
- // manipulating it here. Broker is a private type and Scala doesn't seem
- // to care about that as long as you don't explicitly declare its type.
- val brokerOption = partitionMetadata.flatMap(_.leader)
-
- brokerOption match {
- case Some(broker) => Some(broker.host, broker.port)
- case _ => None
- }
- }
-
- def refreshBrokers {
- var tpToRefresh = topicPartitionsAndOffsets.keySet.toList
- info("Refreshing brokers for: %s" format topicPartitionsAndOffsets)
- retryBackoff.run(
- loop => {
- val topics = tpToRefresh.map(_.topic).toSet
- val topicMetadata = TopicMetadataCache.getTopicMetadata(topics, systemName, (topics: Set[String]) => metadataStore.getTopicInfo(topics))
-
- // addTopicPartition one at a time, leaving the to-be-done list intact in case of exceptions.
- // This avoids trying to re-add the same topic partition repeatedly
- def refresh() = {
- val head = tpToRefresh.head
- // refreshBrokers can be called from abdicate and refreshDropped,
- // both of which are triggered from BrokerProxy threads. To prevent
- // accidentally creating multiple objects for the same broker, or
- // accidentally not updating the topicPartitionsAndOffsets variable,
- // we need to lock.
- this.synchronized {
- // Check if we still need this TopicAndPartition inside the
- // critical section. If we don't, then notAValidEvent it.
- topicPartitionsAndOffsets.get(head) match {
- case Some(nextOffset) =>
- val partitionMetadata = getPartitionMetadata(topicMetadata(head.topic), head.partition)
- getLeaderHostPort(partitionMetadata) match {
- case Some((host, port)) =>
- debug("Got partition metadata for %s: %s" format(head, partitionMetadata.get))
- val brokerProxy = brokerProxies.getOrElseUpdate((host, port), createBrokerProxy(host, port))
- brokerProxy.addTopicPartition(head, Option(nextOffset))
- brokerProxy.start
- debug("Claimed topic-partition (%s) for (%s)".format(head, brokerProxy))
- topicPartitionsAndOffsets -= head
- case None => info("No metadata available for: %s. Will try to refresh and add to a consumer thread later." format head)
- }
- case _ => debug("Ignoring refresh for %s because we already added it from another thread." format head)
- }
- }
- tpToRefresh.tail
- }
-
- while (!tpToRefresh.isEmpty) {
- tpToRefresh = refresh()
- }
-
- loop.done
- },
-
- (exception, loop) => {
- warn("While refreshing brokers for %s: %s. Retrying." format (tpToRefresh.head, exception))
- debug("Exception detail:", exception)
- })
- }
-
- val sink = new MessageSink {
- var lastDroppedRefresh = clock()
-
- def refreshDropped() {
- if (topicPartitionsAndOffsets.size > 0 && clock() - lastDroppedRefresh > 10000) {
- refreshBrokers
- lastDroppedRefresh = clock()
- }
- }
-
- def setIsAtHighWatermark(tp: TopicAndPartition, isAtHighWatermark: Boolean) {
- setIsAtHead(toSystemStreamPartition(tp), isAtHighWatermark)
- }
-
- def needsMoreMessages(tp: TopicAndPartition) = {
- if(fetchLimitByBytesEnabled) {
- getMessagesSizeInQueue(toSystemStreamPartition(tp)) < perPartitionFetchThresholdBytes
- } else {
- getNumMessagesInQueue(toSystemStreamPartition(tp)) < perPartitionFetchThreshold
- }
- }
-
- def getMessageSize(message: Message): Integer = {
- message.size + KafkaSystemConsumer.MESSAGE_SIZE_OVERHEAD
- }
-
- def addMessage(tp: TopicAndPartition, msg: MessageAndOffset, highWatermark: Long) = {
- trace("Incoming message %s: %s." format (tp, msg))
-
- val systemStreamPartition = toSystemStreamPartition(tp)
- val isAtHead = highWatermark == msg.offset
- val offset = msg.offset.toString
- val key = if (msg.message.key != null) {
- keyDeserializer.fromBytes(Utils.readBytes(msg.message.key))
- } else {
- null
- }
- val message = if (!msg.message.isNull) {
- deserializer.fromBytes(Utils.readBytes(msg.message.payload))
- } else {
- null
- }
-
- if(fetchLimitByBytesEnabled ) {
- val ime = new IncomingMessageEnvelope(systemStreamPartition, offset, key, message, getMessageSize(msg.message))
- ime.setTimestamp(if (!msg.message.isNull) msg.message.timestamp else 0L)
- put(systemStreamPartition, ime)
- } else {
- val ime = new IncomingMessageEnvelope(systemStreamPartition, offset, key, message)
- ime.setTimestamp(if (!msg.message.isNull) msg.message.timestamp else 0L)
- put(systemStreamPartition, ime)
- }
-
- setIsAtHead(systemStreamPartition, isAtHead)
- }
-
- def abdicate(tp: TopicAndPartition, nextOffset: Long) {
- info("Abdicating for %s" format (tp))
- topicPartitionsAndOffsets += tp -> nextOffset.toString
- refreshBrokers
- }
-
- private def toSystemStreamPartition(tp: TopicAndPartition) = {
- new SystemStreamPartition(systemName, tp.topic, new Partition(tp.partition))
- }
- }
-}
http://git-wip-us.apache.org/repos/asf/samza/blob/89f79829/samza-kafka/src/main/scala/org/apache/samza/system/kafka/KafkaSystemConsumerMetrics.scala
----------------------------------------------------------------------
diff --git a/samza-kafka/src/main/scala/org/apache/samza/system/kafka/KafkaSystemConsumerMetrics.scala b/samza-kafka/src/main/scala/org/apache/samza/system/kafka/KafkaSystemConsumerMetrics.scala
index 51545a0..1aa66dc 100644
--- a/samza-kafka/src/main/scala/org/apache/samza/system/kafka/KafkaSystemConsumerMetrics.scala
+++ b/samza-kafka/src/main/scala/org/apache/samza/system/kafka/KafkaSystemConsumerMetrics.scala
@@ -35,6 +35,7 @@ class KafkaSystemConsumerMetrics(val systemName: String = "unknown", val registr
val highWatermark = new ConcurrentHashMap[TopicAndPartition, Gauge[Long]]
/*
+ TODO Fix
* (String, Int) = (host, port) of BrokerProxy.
*/
http://git-wip-us.apache.org/repos/asf/samza/blob/89f79829/samza-kafka/src/main/scala/org/apache/samza/system/kafka/NewKafkaSystemConsumer.java
----------------------------------------------------------------------
diff --git a/samza-kafka/src/main/scala/org/apache/samza/system/kafka/NewKafkaSystemConsumer.java b/samza-kafka/src/main/scala/org/apache/samza/system/kafka/NewKafkaSystemConsumer.java
index dd7e584..b745628 100644
--- a/samza-kafka/src/main/scala/org/apache/samza/system/kafka/NewKafkaSystemConsumer.java
+++ b/samza-kafka/src/main/scala/org/apache/samza/system/kafka/NewKafkaSystemConsumer.java
@@ -66,14 +66,14 @@ public class NewKafkaSystemConsumer<K,V> extends BlockingEnvelopeMap implements
private final KafkaSystemConsumerMetrics samzaConsumerMetrics;
private final String clientId;
private final String metricName;
- private final Map<TopicPartition, SystemStreamPartition> topicPartitions2SSP = new HashMap<>();
+ /* package private */final Map<TopicPartition, SystemStreamPartition> topicPartitions2SSP = new HashMap<>();
private final AtomicBoolean stopped = new AtomicBoolean(false);
private final AtomicBoolean started = new AtomicBoolean(false);
private final Config config;
private final boolean fetchThresholdBytesEnabled;
// This sink is used to transfer the messages from the proxy/consumer to the BlockingEnvelopeMap.
- private KafkaConsumerMessageSink messageSink;
+ /* package private */ KafkaConsumerMessageSink messageSink;
// proxy is doing the actual reading
private KafkaConsumerProxy proxy;
@@ -142,17 +142,6 @@ public class NewKafkaSystemConsumer<K,V> extends BlockingEnvelopeMap implements
Map<String, String> injectProps = new HashMap<>();
- // the consumer is fully typed, and deserialization can be too. But in case it is not provided we should
- // default to byte[]
- if ( !config.containsKey(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG)) {
- LOG.info("default key serialization for the consumer(for {}) to ByteArrayDeserializer", systemName);
- injectProps.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, ByteArrayDeserializer.class.getName());
- }
- if ( !config.containsKey(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG)) {
- LOG.info("default value serialization for the consumer(for {}) to ByteArrayDeserializer", systemName);
- injectProps.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, ByteArrayDeserializer.class.getName());
- }
-
// extract kafka consumer configs
KafkaConsumerConfig consumerConfig =
KafkaConsumerConfig.getKafkaSystemConsumerConfig(config, systemName, clientId, injectProps);
@@ -203,7 +192,7 @@ public class NewKafkaSystemConsumer<K,V> extends BlockingEnvelopeMap implements
}
}
- private void createConsumerProxy() {
+ void createConsumerProxy() {
// create a sink for passing the messages between the proxy and the consumer
messageSink = new KafkaConsumerMessageSink();
@@ -219,7 +208,7 @@ public class NewKafkaSystemConsumer<K,V> extends BlockingEnvelopeMap implements
Add the TopicPartitions to the proxy.
Start the proxy thread.
*/
- private void startConsumer() {
+ void startConsumer() {
//set the offset for each TopicPartition
topicPartitions2Offset.forEach((tp, startingOffsetString) -> {
long startingOffset = Long.valueOf(startingOffsetString);
http://git-wip-us.apache.org/repos/asf/samza/blob/89f79829/samza-kafka/src/test/scala/org/apache/samza/checkpoint/kafka/TestKafkaCheckpointManager.scala
----------------------------------------------------------------------
diff --git a/samza-kafka/src/test/scala/org/apache/samza/checkpoint/kafka/TestKafkaCheckpointManager.scala b/samza-kafka/src/test/scala/org/apache/samza/checkpoint/kafka/TestKafkaCheckpointManager.scala
index 8544dbf..8d92f4d 100644
--- a/samza-kafka/src/test/scala/org/apache/samza/checkpoint/kafka/TestKafkaCheckpointManager.scala
+++ b/samza-kafka/src/test/scala/org/apache/samza/checkpoint/kafka/TestKafkaCheckpointManager.scala
@@ -92,8 +92,8 @@ class TestKafkaCheckpointManager extends KafkaServerTestHarness {
assertNull(readCp)
writeCheckpoint(checkpointTopic, taskName, checkpoint1)
-
assertEquals(checkpoint1, readCheckpoint(checkpointTopic, taskName))
+
// writing a second message and reading it returns a more recent checkpoint
writeCheckpoint(checkpointTopic, taskName, checkpoint2)
assertEquals(checkpoint2, readCheckpoint(checkpointTopic, taskName))
@@ -194,7 +194,6 @@ class TestKafkaCheckpointManager extends KafkaServerTestHarness {
val systemFactory = Util.getObj(systemFactoryClassName, classOf[SystemFactory])
val spec = new KafkaStreamSpec("id", cpTopic, checkpointSystemName, 1, 1, props)
- System.out.println("CONFIG = " + config)
new KafkaCheckpointManager(spec, systemFactory, failOnTopicValidation, config, new NoOpMetricsRegistry, serde)
}
http://git-wip-us.apache.org/repos/asf/samza/blob/89f79829/samza-kafka/src/test/scala/org/apache/samza/system/kafka/TestBrokerProxy.scala
----------------------------------------------------------------------
diff --git a/samza-kafka/src/test/scala/org/apache/samza/system/kafka/TestBrokerProxy.scala b/samza-kafka/src/test/scala/org/apache/samza/system/kafka/TestBrokerProxy.scala
index d510076..a3f76e7 100644
--- a/samza-kafka/src/test/scala/org/apache/samza/system/kafka/TestBrokerProxy.scala
+++ b/samza-kafka/src/test/scala/org/apache/samza/system/kafka/TestBrokerProxy.scala
@@ -41,6 +41,7 @@ import org.mockito.{Matchers, Mockito}
import scala.collection.JavaConverters._
class TestBrokerProxy extends Logging {
+ /*
val tp2 = new TopicAndPartition("Redbird", 2013)
var fetchTp1 = true // control whether fetching tp1 messages or not
@@ -305,6 +306,7 @@ class TestBrokerProxy extends Logging {
}
/**
+ * TODO fix
* Test that makes sure that BrokerProxy abdicates all TopicAndPartitions
* that it owns when a consumer failure occurs.
*/
@@ -431,4 +433,5 @@ class TestBrokerProxy extends Logging {
bp.stop
verify(mockSimpleConsumer).close
}
+ */
}
http://git-wip-us.apache.org/repos/asf/samza/blob/89f79829/samza-kafka/src/test/scala/org/apache/samza/system/kafka/TestKafkaSystemConsumer.scala
----------------------------------------------------------------------
diff --git a/samza-kafka/src/test/scala/org/apache/samza/system/kafka/TestKafkaSystemConsumer.scala b/samza-kafka/src/test/scala/org/apache/samza/system/kafka/TestKafkaSystemConsumer.scala
deleted file mode 100644
index 8656d10..0000000
--- a/samza-kafka/src/test/scala/org/apache/samza/system/kafka/TestKafkaSystemConsumer.scala
+++ /dev/null
@@ -1,191 +0,0 @@
-/*
- * 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.samza.system.kafka
-
-import kafka.api.TopicMetadata
-import kafka.api.PartitionMetadata
-import kafka.cluster.Broker
-import kafka.common.TopicAndPartition
-import kafka.message.Message
-import kafka.message.MessageAndOffset
-import org.apache.kafka.common.protocol.Errors
-import org.apache.samza.system.IncomingMessageEnvelope
-import org.apache.samza.system.SystemStreamPartition
-import org.apache.samza.Partition
-import org.apache.samza.util.TopicMetadataStore
-import org.junit.Test
-import org.junit.Assert._
-import org.apache.samza.system.SystemAdmin
-import org.mockito.Mockito._
-import org.mockito.Matchers._
-
-class TestKafkaSystemConsumer {
- val systemAdmin: SystemAdmin = mock(classOf[KafkaSystemAdmin])
- private val SSP: SystemStreamPartition = new SystemStreamPartition("test", "test", new Partition(0))
- private val envelope: IncomingMessageEnvelope = new IncomingMessageEnvelope(SSP, null, null, null)
- private val envelopeWithSize: IncomingMessageEnvelope = new IncomingMessageEnvelope(SSP, null, null, null, 100)
- private val clientId = "TestClientId"
-
- @Test
- def testFetchThresholdShouldDivideEvenlyAmongPartitions {
- val metadataStore = new MockMetadataStore
- val consumer = new KafkaSystemConsumer("", systemAdmin, new KafkaSystemConsumerMetrics, metadataStore, clientId, fetchThreshold = 50000) {
- override def refreshBrokers {
- }
- }
-
- for (i <- 0 until 50) {
- consumer.register(new SystemStreamPartition("test-system", "test-stream", new Partition(i)), "0")
- }
-
- consumer.start
-
- assertEquals(1000, consumer.perPartitionFetchThreshold)
- }
-
- @Test
- def testBrokerCreationShouldTriggerStart {
- val systemName = "test-system"
- val streamName = "test-stream"
- val metrics = new KafkaSystemConsumerMetrics
- // Lie and tell the store that the partition metadata is empty. We can't
- // use partition metadata because it has Broker in its constructor, which
- // is package private to Kafka.
- val metadataStore = new MockMetadataStore(Map(streamName -> TopicMetadata(streamName, Seq.empty, Errors.NONE)))
- var hosts = List[String]()
- var getHostPortCount = 0
- val consumer = new KafkaSystemConsumer(systemName, systemAdmin, metrics, metadataStore, clientId) {
- override def getLeaderHostPort(partitionMetadata: Option[PartitionMetadata]): Option[(String, Int)] = {
- // Generate a unique host every time getHostPort is called.
- getHostPortCount += 1
- Some("localhost-%s" format getHostPortCount, 0)
- }
-
- override def createBrokerProxy(host: String, port: Int): BrokerProxy = {
- new BrokerProxy(host, port, systemName, "", metrics, sink) {
- override def addTopicPartition(tp: TopicAndPartition, nextOffset: Option[String]) = {
- // Skip this since we normally do verification of offsets, which
- // tries to connect to Kafka. Rather than mock that, just forget it.
- nextOffsets.size
- }
-
- override def start {
- hosts :+= host
- }
- }
- }
- }
-
- consumer.register(new SystemStreamPartition(systemName, streamName, new Partition(0)), "1")
- assertEquals(0, hosts.size)
- consumer.start
- assertEquals(List("localhost-1"), hosts)
- // Should trigger a refresh with a new host.
- consumer.sink.abdicate(new TopicAndPartition(streamName, 0), 2)
- assertEquals(List("localhost-1", "localhost-2"), hosts)
- }
-
- @Test
- def testConsumerRegisterOlderOffsetOfTheSamzaSSP {
- when(systemAdmin.offsetComparator(anyString, anyString)).thenCallRealMethod()
-
- val metadataStore = new MockMetadataStore
- val consumer = new KafkaSystemConsumer("", systemAdmin, new KafkaSystemConsumerMetrics, metadataStore, clientId, fetchThreshold = 50000)
- val ssp0 = new SystemStreamPartition("test-system", "test-stream", new Partition(0))
- val ssp1 = new SystemStreamPartition("test-system", "test-stream", new Partition(1))
- val ssp2 = new SystemStreamPartition("test-system", "test-stream", new Partition(2))
-
- consumer.register(ssp0, "0")
- consumer.register(ssp0, "5")
- consumer.register(ssp1, "2")
- consumer.register(ssp1, "3")
- consumer.register(ssp2, "0")
-
- assertEquals("0", consumer.topicPartitionsAndOffsets(KafkaSystemConsumer.toTopicAndPartition(ssp0)))
- assertEquals("2", consumer.topicPartitionsAndOffsets(KafkaSystemConsumer.toTopicAndPartition(ssp1)))
- assertEquals("0", consumer.topicPartitionsAndOffsets(KafkaSystemConsumer.toTopicAndPartition(ssp2)))
- }
-
- @Test
- def testFetchThresholdBytesShouldDivideEvenlyAmongPartitions {
- val metadataStore = new MockMetadataStore
- val consumer = new KafkaSystemConsumer("", systemAdmin, new KafkaSystemConsumerMetrics, metadataStore, clientId,
- fetchThreshold = 50000, fetchThresholdBytes = 60000L, fetchLimitByBytesEnabled = true) {
- override def refreshBrokers {
- }
- }
-
- for (i <- 0 until 10) {
- consumer.register(new SystemStreamPartition("test-system", "test-stream", new Partition(i)), "0")
- }
-
- consumer.start
-
- assertEquals(5000, consumer.perPartitionFetchThreshold)
- assertEquals(3000, consumer.perPartitionFetchThresholdBytes)
- }
-
- @Test
- def testFetchThresholdBytes {
- val metadataStore = new MockMetadataStore
- val consumer = new KafkaSystemConsumer("test-system", systemAdmin, new KafkaSystemConsumerMetrics, metadataStore, clientId,
- fetchThreshold = 50000, fetchThresholdBytes = 60000L, fetchLimitByBytesEnabled = true) {
- override def refreshBrokers {
- }
- }
-
- for (i <- 0 until 10) {
- consumer.register(new SystemStreamPartition("test-system", "test-stream", new Partition(i)), "0")
- }
-
- consumer.start
-
- val msg = Array[Byte](5, 112, 9, 126)
- val msgAndOffset: MessageAndOffset = MessageAndOffset(new Message(msg), 887654)
- // 4 data + 18 Message overhead + 80 IncomingMessageEnvelope overhead
- consumer.sink.addMessage(new TopicAndPartition("test-stream", 0), msgAndOffset, 887354)
-
- assertEquals(106, consumer.getMessagesSizeInQueue(new SystemStreamPartition("test-system", "test-stream", new Partition(0))))
- }
-
- @Test
- def testFetchThresholdBytesDisabled {
- val metadataStore = new MockMetadataStore
- val consumer = new KafkaSystemConsumer("", systemAdmin, new KafkaSystemConsumerMetrics, metadataStore, clientId,
- fetchThreshold = 50000, fetchThresholdBytes = 60000L) {
- override def refreshBrokers {
- }
- }
-
- for (i <- 0 until 10) {
- consumer.register(new SystemStreamPartition("test-system", "test-stream", new Partition(i)), "0")
- }
-
- consumer.start
-
- assertEquals(5000, consumer.perPartitionFetchThreshold)
- assertEquals(0, consumer.perPartitionFetchThresholdBytes)
- assertEquals(0, consumer.getMessagesSizeInQueue(new SystemStreamPartition("test-system", "test-stream", new Partition(0))))
- }
-}
-
-class MockMetadataStore(var metadata: Map[String, TopicMetadata] = Map()) extends TopicMetadataStore {
- def getTopicInfo(topics: Set[String]): Map[String, TopicMetadata] = metadata
-}
http://git-wip-us.apache.org/repos/asf/samza/blob/89f79829/samza-kafka/src/test/scala/org/apache/samza/system/kafka/TestNewKafkaSystemConsumer.java
----------------------------------------------------------------------
diff --git a/samza-kafka/src/test/scala/org/apache/samza/system/kafka/TestNewKafkaSystemConsumer.java b/samza-kafka/src/test/scala/org/apache/samza/system/kafka/TestNewKafkaSystemConsumer.java
new file mode 100644
index 0000000..f7f63f3
--- /dev/null
+++ b/samza-kafka/src/test/scala/org/apache/samza/system/kafka/TestNewKafkaSystemConsumer.java
@@ -0,0 +1,203 @@
+package org.apache.samza.system.kafka;
+
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+import org.apache.kafka.clients.consumer.Consumer;
+import org.apache.kafka.clients.consumer.ConsumerConfig;
+import org.apache.kafka.clients.consumer.KafkaConsumer;
+import org.apache.kafka.clients.consumer.KafkaConsumerConfig;
+import org.apache.kafka.common.serialization.ByteArraySerializer;
+import org.apache.samza.Partition;
+import org.apache.samza.config.Config;
+import org.apache.samza.config.KafkaConfig;
+import org.apache.samza.config.MapConfig;
+import org.apache.samza.system.IncomingMessageEnvelope;
+import org.apache.samza.system.SystemStreamPartition;
+import org.apache.samza.util.Clock;
+import org.apache.samza.util.NoOpMetricsRegistry;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+
+public class TestNewKafkaSystemConsumer {
+ public final String TEST_SYSTEM = "test-system";
+ public final String TEST_STREAM = "test-stream";
+ public final String TEST_CLIENT_ID = "testClientId";
+ public final String BOOTSTRAP_SERVER = "127.0.0.1:8888";
+ public final String FETCH_THRESHOLD_MSGS = "50000";
+ public final String FETCH_THRESHOLD_BYTES = "100000";
+
+ @Before
+ public void setUp() {
+
+ }
+
+ private NewKafkaSystemConsumer setupConsumer(String fetchMsg, String fetchBytes) {
+ final Map<String, String> map = new HashMap<>();
+
+ map.put(String.format(KafkaConfig.CONSUMER_FETCH_THRESHOLD(), TEST_SYSTEM), fetchMsg);
+ map.put(String.format(KafkaConfig.CONSUMER_FETCH_THRESHOLD_BYTES(), TEST_SYSTEM), fetchBytes);
+ map.put(String.format("systems.%s.consumer.%s", TEST_SYSTEM, ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG),
+ BOOTSTRAP_SERVER);
+
+ Config config = new MapConfig(map);
+ KafkaConsumerConfig consumerConfig =
+ KafkaConsumerConfig.getKafkaSystemConsumerConfig(config, TEST_SYSTEM, TEST_CLIENT_ID, Collections.emptyMap());
+ final KafkaConsumer<byte[], byte[]> kafkaConsumer = new MockKafkaConsumer(consumerConfig.originals());
+
+ MockNewKafkaSystmeCosumer newKafkaSystemConsumer =
+ new MockNewKafkaSystmeCosumer(kafkaConsumer, TEST_SYSTEM, config, TEST_CLIENT_ID,
+ new KafkaSystemConsumerMetrics(TEST_SYSTEM, new NoOpMetricsRegistry()), System::currentTimeMillis);
+
+ return newKafkaSystemConsumer;
+ }
+
+ @Test
+ public void testConfigValidations() {
+
+ final NewKafkaSystemConsumer consumer = setupConsumer(FETCH_THRESHOLD_MSGS, FETCH_THRESHOLD_BYTES);
+
+ consumer.start();
+ // should be no failures
+ }
+
+ @Test
+ public void testFetchThresholdShouldDivideEvenlyAmongPartitions() {
+ final NewKafkaSystemConsumer consumer = setupConsumer(FETCH_THRESHOLD_MSGS, FETCH_THRESHOLD_BYTES);
+ final int partitionsNum = 50;
+ for (int i = 0; i < partitionsNum; i++) {
+ consumer.register(new SystemStreamPartition(TEST_SYSTEM, TEST_STREAM, new Partition(i)), "0");
+ }
+
+ consumer.start();
+
+ Assert.assertEquals(Long.valueOf(FETCH_THRESHOLD_MSGS) / partitionsNum, consumer.perPartitionFetchThreshold);
+ Assert.assertEquals(Long.valueOf(FETCH_THRESHOLD_BYTES) / 2 / partitionsNum,
+ consumer.perPartitionFetchThresholdBytes);
+ }
+
+ @Test
+ public void testConsumerRegisterOlderOffsetOfTheSamzaSSP() {
+
+ NewKafkaSystemConsumer consumer = setupConsumer(FETCH_THRESHOLD_MSGS, FETCH_THRESHOLD_BYTES);
+
+ SystemStreamPartition ssp0 = new SystemStreamPartition(TEST_SYSTEM, TEST_STREAM, new Partition(0));
+ SystemStreamPartition ssp1 = new SystemStreamPartition(TEST_SYSTEM, TEST_STREAM, new Partition(1));
+ SystemStreamPartition ssp2 = new SystemStreamPartition(TEST_SYSTEM, TEST_STREAM, new Partition(2));
+
+ consumer.register(ssp0, "0");
+ consumer.register(ssp0, "5");
+ consumer.register(ssp1, "2");
+ consumer.register(ssp1, "3");
+ consumer.register(ssp2, "0");
+
+ assertEquals("0", consumer.topicPartitions2Offset.get(NewKafkaSystemConsumer.toTopicPartition(ssp0)));
+ assertEquals("2", consumer.topicPartitions2Offset.get(NewKafkaSystemConsumer.toTopicPartition(ssp1)));
+ assertEquals("0", consumer.topicPartitions2Offset.get(NewKafkaSystemConsumer.toTopicPartition(ssp2)));
+ }
+
+ @Test
+ public void testFetchThresholdBytes() {
+
+ SystemStreamPartition ssp0 = new SystemStreamPartition(TEST_SYSTEM, TEST_STREAM, new Partition(0));
+ SystemStreamPartition ssp1 = new SystemStreamPartition(TEST_SYSTEM, TEST_STREAM, new Partition(1));
+ int partitionsNum = 2;
+ int ime0Size = Integer.valueOf(FETCH_THRESHOLD_MSGS) / partitionsNum; // fake size
+ int ime1Size = Integer.valueOf(FETCH_THRESHOLD_MSGS) / partitionsNum - 1; // fake size
+ int ime11Size = 20;
+ ByteArraySerializer bytesSerde = new ByteArraySerializer();
+ IncomingMessageEnvelope ime0 = new IncomingMessageEnvelope(ssp0, "0", bytesSerde.serialize("", "key0".getBytes()),
+ bytesSerde.serialize("", "value0".getBytes()), ime0Size);
+ IncomingMessageEnvelope ime1 = new IncomingMessageEnvelope(ssp1, "0", bytesSerde.serialize("", "key1".getBytes()),
+ bytesSerde.serialize("", "value1".getBytes()), ime1Size);
+ IncomingMessageEnvelope ime11 = new IncomingMessageEnvelope(ssp1, "0", bytesSerde.serialize("", "key11".getBytes()),
+ bytesSerde.serialize("", "value11".getBytes()), ime11Size);
+ NewKafkaSystemConsumer consumer = setupConsumer(FETCH_THRESHOLD_MSGS, FETCH_THRESHOLD_BYTES);
+
+ consumer.register(ssp0, "0");
+ consumer.register(ssp1, "0");
+ consumer.start();
+ consumer.messageSink.addMessage(ssp0, ime0);
+ // queue for ssp0 should be full now, because we added message of size FETCH_THRESHOLD_MSGS/partitionsNum
+ Assert.assertEquals(false, consumer.messageSink.needsMoreMessages(ssp0));
+ consumer.messageSink.addMessage(ssp1, ime1);
+ // queue for ssp1 should be less then full now, because we added message of size (FETCH_THRESHOLD_MSGS/partitionsNum - 1)
+ Assert.assertEquals(true, consumer.messageSink.needsMoreMessages(ssp1));
+ consumer.messageSink.addMessage(ssp1, ime11);
+ // queue for ssp1 should full now, because we added message of size 20 on top
+ Assert.assertEquals(false, consumer.messageSink.needsMoreMessages(ssp1));
+
+ Assert.assertEquals(1, consumer.getNumMessagesInQueue(ssp0));
+ Assert.assertEquals(2, consumer.getNumMessagesInQueue(ssp1));
+ Assert.assertEquals(ime0Size, consumer.getMessagesSizeInQueue(ssp0));
+ Assert.assertEquals(ime1Size + ime11Size, consumer.getMessagesSizeInQueue(ssp1));
+ }
+
+ @Test
+ public void testFetchThresholdBytesDiabled() {
+ // Pass 0 as fetchThresholdByBytes, which disables checking for limit by size
+
+ SystemStreamPartition ssp0 = new SystemStreamPartition(TEST_SYSTEM, TEST_STREAM, new Partition(0));
+ SystemStreamPartition ssp1 = new SystemStreamPartition(TEST_SYSTEM, TEST_STREAM, new Partition(1));
+ int partitionsNum = 2;
+ int ime0Size = Integer.valueOf(FETCH_THRESHOLD_MSGS) / partitionsNum; // fake size, upto the limit
+ int ime1Size = Integer.valueOf(FETCH_THRESHOLD_MSGS) / partitionsNum - 100; // fake size, below the limit
+ int ime11Size = 20;// event with the second message still below the size limit
+ ByteArraySerializer bytesSerde = new ByteArraySerializer();
+ IncomingMessageEnvelope ime0 = new IncomingMessageEnvelope(ssp0, "0", bytesSerde.serialize("", "key0".getBytes()),
+ bytesSerde.serialize("", "value0".getBytes()), ime0Size);
+ IncomingMessageEnvelope ime1 = new IncomingMessageEnvelope(ssp1, "0", bytesSerde.serialize("", "key1".getBytes()),
+ bytesSerde.serialize("", "value1".getBytes()), ime1Size);
+ IncomingMessageEnvelope ime11 = new IncomingMessageEnvelope(ssp1, "0", bytesSerde.serialize("", "key11".getBytes()),
+ bytesSerde.serialize("", "value11".getBytes()), ime11Size);
+
+ // limit by number of messages 4/2 = 2 per partition
+ // limit by number of bytes - disabled
+ NewKafkaSystemConsumer consumer = setupConsumer("4", "0"); // should disable
+
+ consumer.register(ssp0, "0");
+ consumer.register(ssp1, "0");
+ consumer.start();
+ consumer.messageSink.addMessage(ssp0, ime0);
+ // should be full by size, but not full by number of messages (1 of 2)
+ Assert.assertEquals(true, consumer.messageSink.needsMoreMessages(ssp0));
+ consumer.messageSink.addMessage(ssp1, ime1);
+ // not full neither by size nor by messages
+ Assert.assertEquals(true, consumer.messageSink.needsMoreMessages(ssp1));
+ consumer.messageSink.addMessage(ssp1, ime11);
+ // not full by size, but should be full by messages
+ Assert.assertEquals(false, consumer.messageSink.needsMoreMessages(ssp1));
+
+ Assert.assertEquals(1, consumer.getNumMessagesInQueue(ssp0));
+ Assert.assertEquals(2, consumer.getNumMessagesInQueue(ssp1));
+ Assert.assertEquals(ime0Size, consumer.getMessagesSizeInQueue(ssp0));
+ Assert.assertEquals(ime1Size + ime11Size, consumer.getMessagesSizeInQueue(ssp1));
+ }
+
+ // mock kafkaConsumer and SystemConsumer
+ static class MockKafkaConsumer extends KafkaConsumer {
+ public MockKafkaConsumer(Map<String, Object> configs) {
+ super(configs);
+ }
+ }
+
+ static class MockNewKafkaSystmeCosumer extends NewKafkaSystemConsumer {
+ public MockNewKafkaSystmeCosumer(Consumer kafkaConsumer, String systemName, Config config, String clientId,
+ KafkaSystemConsumerMetrics metrics, Clock clock) {
+ super(kafkaConsumer, systemName, config, clientId, metrics, clock);
+ }
+
+ @Override
+ void createConsumerProxy() {
+ this.messageSink = new KafkaConsumerMessageSink();
+ }
+
+ @Override
+ void startConsumer() {
+ }
+ }
+}