public void shutdown() {
try {
logger.info("Producer thread " + threadName + " shutting down");
producerDataChannel.sendRequest(shutdownMessage);
} catch (InterruptedException ie) {
logger.warn("Interrupt during shutdown of ProducerThread", ie);
}
}
public void awaitShutdown() {
try {
shutdownComplete.await();
producer.close();
logger.info("Producer thread " + threadName + " shutdown complete");
} catch (InterruptedException ie) {
logger.warn("Interrupt during shutdown of ProducerThread", ie);
}
}
public void shutdown() {
logger.info("Migration thread " + threadName + " shutting down");
isRunning.set(false);
interrupt();
try {
shutdownComplete.await();
} catch (InterruptedException ie) {
logger.warn("Interrupt during shutdown of MigrationThread", ie);
}
logger.info("Migration thread " + threadName + " shutdown complete");
}
public static void main(String[] args) throws InterruptedException, IOException {
OptionParser parser = new OptionParser();
ArgumentAcceptingOptionSpec<String> consumerConfigOpt =
parser
.accepts(
"consumer.config",
"Kafka 0.7 consumer config to consume from the source 0.7 cluster. "
+ "You man specify multiple of these.")
.withRequiredArg()
.describedAs("config file")
.ofType(String.class);
ArgumentAcceptingOptionSpec<String> producerConfigOpt =
parser
.accepts("producer.config", "Producer config.")
.withRequiredArg()
.describedAs("config file")
.ofType(String.class);
ArgumentAcceptingOptionSpec<Integer> numProducersOpt =
parser
.accepts("num.producers", "Number of producer instances")
.withRequiredArg()
.describedAs("Number of producers")
.ofType(Integer.class)
.defaultsTo(1);
ArgumentAcceptingOptionSpec<String> zkClient01JarOpt =
parser
.accepts("zkclient.01.jar", "zkClient 0.1 jar file")
.withRequiredArg()
.describedAs("zkClient 0.1 jar file required by Kafka 0.7")
.ofType(String.class);
ArgumentAcceptingOptionSpec<String> kafka07JarOpt =
parser
.accepts("kafka.07.jar", "Kafka 0.7 jar file")
.withRequiredArg()
.describedAs("kafka 0.7 jar")
.ofType(String.class);
ArgumentAcceptingOptionSpec<Integer> numStreamsOpt =
parser
.accepts("num.streams", "Number of consumer streams")
.withRequiredArg()
.describedAs("Number of consumer threads")
.ofType(Integer.class)
.defaultsTo(1);
ArgumentAcceptingOptionSpec<String> whitelistOpt =
parser
.accepts("whitelist", "Whitelist of topics to migrate from the 0.7 cluster")
.withRequiredArg()
.describedAs("Java regex (String)")
.ofType(String.class);
ArgumentAcceptingOptionSpec<String> blacklistOpt =
parser
.accepts("blacklist", "Blacklist of topics to migrate from the 0.7 cluster")
.withRequiredArg()
.describedAs("Java regex (String)")
.ofType(String.class);
ArgumentAcceptingOptionSpec<Integer> queueSizeOpt =
parser
.accepts(
"queue.size",
"Number of messages that are buffered between the 0.7 consumer and 0.8 producer")
.withRequiredArg()
.describedAs("Queue size in terms of number of messages")
.ofType(Integer.class)
.defaultsTo(10000);
OptionSpecBuilder helpOpt = parser.accepts("help", "Print this message.");
OptionSet options = parser.parse(args);
if (options.has(helpOpt)) {
parser.printHelpOn(System.out);
System.exit(0);
}
checkRequiredArgs(
parser,
options,
new OptionSpec[] {consumerConfigOpt, producerConfigOpt, zkClient01JarOpt, kafka07JarOpt});
int whiteListCount = options.has(whitelistOpt) ? 1 : 0;
int blackListCount = options.has(blacklistOpt) ? 1 : 0;
if (whiteListCount + blackListCount != 1) {
System.err.println("Exactly one of whitelist or blacklist is required.");
System.exit(1);
}
String kafkaJarFile_07 = options.valueOf(kafka07JarOpt);
String zkClientJarFile = options.valueOf(zkClient01JarOpt);
String consumerConfigFile_07 = options.valueOf(consumerConfigOpt);
int numConsumers = options.valueOf(numStreamsOpt);
String producerConfigFile_08 = options.valueOf(producerConfigOpt);
int numProducers = options.valueOf(numProducersOpt);
final List<MigrationThread> migrationThreads = new ArrayList<MigrationThread>(numConsumers);
final List<ProducerThread> producerThreads = new ArrayList<ProducerThread>(numProducers);
try {
File kafkaJar_07 = new File(kafkaJarFile_07);
File zkClientJar = new File(zkClientJarFile);
ParentLastURLClassLoader c1 =
new ParentLastURLClassLoader(
new URL[] {kafkaJar_07.toURI().toURL(), zkClientJar.toURI().toURL()});
/** Construct the 07 consumer config * */
ConsumerConfig_07 = c1.loadClass(KAFKA_07_CONSUMER_CONFIG_CLASS_NAME);
KafkaStaticConsumer_07 = c1.loadClass(KAFKA_07_STATIC_CONSUMER_CLASS_NAME);
ConsumerConnector_07 = c1.loadClass(KAFKA_07_CONSUMER_CONNECTOR_CLASS_NAME);
KafkaStream_07 = c1.loadClass(KAFKA_07_CONSUMER_STREAM_CLASS_NAME);
TopicFilter_07 = c1.loadClass(KAFKA_07_TOPIC_FILTER_CLASS_NAME);
WhiteList_07 = c1.loadClass(KAFKA_07_WHITE_LIST_CLASS_NAME);
BlackList_07 = c1.loadClass(KAFKA_07_BLACK_LIST_CLASS_NAME);
KafkaMessageClass_07 = c1.loadClass(KAFKA_07_MESSAGE_CLASS_NAME);
KafkaConsumerIteratorClass_07 = c1.loadClass(KAFKA_07_CONSUMER_ITERATOR_CLASS_NAME);
KafkaMessageAndMetatDataClass_07 = c1.loadClass(KAFKA_07_MESSAGE_AND_METADATA_CLASS_NAME);
Constructor ConsumerConfigConstructor_07 = ConsumerConfig_07.getConstructor(Properties.class);
Properties kafkaConsumerProperties_07 = new Properties();
kafkaConsumerProperties_07.load(new FileInputStream(consumerConfigFile_07));
/**
* Disable shallow iteration because the message format is different between 07 and 08, we
* have to get each individual message *
*/
if (kafkaConsumerProperties_07.getProperty("shallow.iterator.enable", "").equals("true")) {
log.warn("Shallow iterator should not be used in the migration tool");
kafkaConsumerProperties_07.setProperty("shallow.iterator.enable", "false");
}
Object consumerConfig_07 =
ConsumerConfigConstructor_07.newInstance(kafkaConsumerProperties_07);
/** Construct the 07 consumer connector * */
Method ConsumerConnectorCreationMethod_07 =
KafkaStaticConsumer_07.getMethod("createJavaConsumerConnector", ConsumerConfig_07);
final Object consumerConnector_07 =
ConsumerConnectorCreationMethod_07.invoke(null, consumerConfig_07);
Method ConsumerConnectorCreateMessageStreamsMethod_07 =
ConsumerConnector_07.getMethod("createMessageStreamsByFilter", TopicFilter_07, int.class);
final Method ConsumerConnectorShutdownMethod_07 = ConsumerConnector_07.getMethod("shutdown");
Constructor WhiteListConstructor_07 = WhiteList_07.getConstructor(String.class);
Constructor BlackListConstructor_07 = BlackList_07.getConstructor(String.class);
Object filterSpec = null;
if (options.has(whitelistOpt))
filterSpec = WhiteListConstructor_07.newInstance(options.valueOf(whitelistOpt));
else filterSpec = BlackListConstructor_07.newInstance(options.valueOf(blacklistOpt));
Object retKafkaStreams =
ConsumerConnectorCreateMessageStreamsMethod_07.invoke(
consumerConnector_07, filterSpec, numConsumers);
Properties kafkaProducerProperties_08 = new Properties();
kafkaProducerProperties_08.load(new FileInputStream(producerConfigFile_08));
kafkaProducerProperties_08.setProperty("serializer.class", "kafka.serializer.DefaultEncoder");
// create a producer channel instead
int queueSize = options.valueOf(queueSizeOpt);
ProducerDataChannel<KeyedMessage<byte[], byte[]>> producerDataChannel =
new ProducerDataChannel<KeyedMessage<byte[], byte[]>>(queueSize);
int threadId = 0;
Runtime.getRuntime()
.addShutdownHook(
new Thread() {
@Override
public void run() {
try {
ConsumerConnectorShutdownMethod_07.invoke(consumerConnector_07);
} catch (Exception e) {
log.error("Error while shutting down Kafka consumer", e);
}
for (MigrationThread migrationThread : migrationThreads) {
migrationThread.shutdown();
}
for (ProducerThread producerThread : producerThreads) {
producerThread.shutdown();
}
for (ProducerThread producerThread : producerThreads) {
producerThread.awaitShutdown();
}
log.info("Kafka migration tool shutdown successfully");
}
});
// start consumer threads
for (Object stream : (List) retKafkaStreams) {
MigrationThread thread = new MigrationThread(stream, producerDataChannel, threadId);
threadId++;
thread.start();
migrationThreads.add(thread);
}
String clientId = kafkaProducerProperties_08.getProperty("client.id");
// start producer threads
for (int i = 0; i < numProducers; i++) {
kafkaProducerProperties_08.put("client.id", clientId + "-" + i);
ProducerConfig producerConfig_08 = new ProducerConfig(kafkaProducerProperties_08);
Producer producer = new Producer(producerConfig_08);
ProducerThread producerThread = new ProducerThread(producerDataChannel, producer, i);
producerThread.start();
producerThreads.add(producerThread);
}
} catch (Throwable e) {
System.out.println("Kafka migration tool failed due to: " + Utils.stackTrace(e));
log.error("Kafka migration tool failed: ", e);
}
}