public static List<kafka.javaapi.TopicMetadata> MetadataDump() {
kafka.javaapi.consumer.SimpleConsumer consumer =
new SimpleConsumer("0.0.0.0", 9092, 100000, 64 * 1024, "metadata");
List<String> topics = new ArrayList<String>();
TopicMetadataRequest req = new TopicMetadataRequest(topics);
kafka.javaapi.TopicMetadataResponse res = consumer.send(req);
return res.topicsMetadata();
};
/** Get offset ranges */
protected long[] getOffsetRange() throws IOException {
/* get smallest and largest offsets*/
long[] range = new long[2];
TopicAndPartition topicAndPartition =
new TopicAndPartition(_request.getTopic(), _request.getPartition());
Map<TopicAndPartition, PartitionOffsetRequestInfo> requestInfo =
new HashMap<TopicAndPartition, PartitionOffsetRequestInfo>();
requestInfo.put(
topicAndPartition,
new PartitionOffsetRequestInfo(kafka.api.OffsetRequest.EarliestTime(), 1));
OffsetRequest request =
new OffsetRequest(
requestInfo,
kafka.api.OffsetRequest.CurrentVersion(),
kafka.api.OffsetRequest.DefaultClientId());
long[] startOffsets =
_consumer.getOffsetsBefore(request).offsets(_request.getTopic(), _request.getPartition());
if (startOffsets.length != 1)
throw new IOException(
"input:" + _input + " Expect one smallest offset but get " + startOffsets.length);
range[0] = startOffsets[0];
requestInfo.clear();
requestInfo.put(
topicAndPartition, new PartitionOffsetRequestInfo(kafka.api.OffsetRequest.LatestTime(), 1));
request =
new OffsetRequest(
requestInfo,
kafka.api.OffsetRequest.CurrentVersion(),
kafka.api.OffsetRequest.DefaultClientId());
long[] endOffsets =
_consumer.getOffsetsBefore(request).offsets(_request.getTopic(), _request.getPartition());
if (endOffsets.length != 1)
throw new IOException(
"input:" + _input + " Expect one latest offset but get " + endOffsets.length);
range[1] = endOffsets[0];
/*adjust range based on input offsets*/
if (_request.isValidOffset()) {
long startOffset = _request.getOffset();
if (startOffset > range[0]) {
System.out.println("Update starting offset with " + startOffset);
range[0] = startOffset;
} else {
System.out.println(
"WARNING: given starting offset "
+ startOffset
+ " is smaller than the smallest one "
+ range[0]
+ ". Will ignore it.");
}
}
System.out.println("Using offset range [" + range[0] + ", " + range[1] + "]");
return range;
}
@Override
public void run() {
long offset = 0;
while (isAlive) {
// create a fetch request for topic “topic1”, partition 0, current offset, and fetch size of
// 1MB
FetchRequest fetchRequest =
new FetchRequestBuilder()
.clientId("default_client")
.addFetch("topic1", 1, offset, 1000000)
.build();
// FetchRequest fetchRequest = new FetchRequest("topic1", 0, offset, 1000000);
// get the message set from the consumer and print them out
ByteBufferMessageSet messages = consumer.fetch(fetchRequest).messageSet("topic1", 1);
Iterator<MessageAndOffset> itr = messages.iterator();
while (itr.hasNext() && isAlive) {
MessageAndOffset msg = itr.next();
// advance the offset after consuming each message
offset = msg.offset();
logger.debug(
"consumed: {} offset: {}",
byteBufferToString(msg.message().payload()).toString(),
offset);
receiveCount++;
}
}
}
// @Ignore
@After
public void tearDown() throws IOException {
kafkaSink.stop();
simpleConsumer.close();
// kafkaServer.shutdown();
// zookeeperServer.shutdown();
}
public Map<Partition, Broker> findPartBrokers(List<String> topics) throws IOException {
Set<Broker> newMetaBrokers = new HashSet<Broker>();
Map<Partition, Broker> partBrokers = null;
String error = null;
for (Broker metaBroker : metaBrokers) {
SimpleConsumer consumer = null;
try {
consumer = clusterConsumer.connections.getConsumer(metaBroker);
TopicMetadataRequest request = new TopicMetadataRequest(topics);
TopicMetadataResponse response = consumer.send(request);
List<TopicMetadata> metadatas = response.topicsMetadata();
Map<Partition, Broker> _partBrokers = new TreeMap<Partition, Broker>();
for (TopicMetadata metadata : metadatas) {
for (PartitionMetadata partitionMetadata : metadata.partitionsMetadata()) {
Partition partition = new Partition(metadata.topic(), partitionMetadata.partitionId());
Broker broker = new Broker(partitionMetadata.leader());
_partBrokers.put(partition, broker);
if (LOG.isDebugEnabled()) {
LOG.debug("find partition=" + partition + " at broker=" + broker);
}
if (!metaBrokers.contains(broker)) {
LOG.info("find new meta broker=" + broker);
newMetaBrokers.add(broker);
}
}
}
partBrokers = _partBrokers;
break;
} catch (Exception e) {
LOG.warn("topic meta data request fail=" + topics + " at broker=" + metaBroker, e);
error = e.getMessage();
} finally {
clusterConsumer.connections.returnConsumer(metaBroker, consumer);
}
}
metaBrokers.addAll(newMetaBrokers);
if (partBrokers != null) {
return partBrokers;
} else {
throw new IOException("meta request fail=" + error + " for topics=" + topics);
}
}
private PartitionMetadata findLeader(
List<String> a_seedBrokers, int a_port, String a_topic, int a_partition) {
PartitionMetadata returnMetaData = null;
loop:
for (String seed : a_seedBrokers) {
SimpleConsumer consumer = null;
try {
consumer = new SimpleConsumer(seed, a_port, 100000, 64 * 1024, "leaderLookup");
List<String> topics = Collections.singletonList(a_topic);
TopicMetadataRequest req = new TopicMetadataRequest(topics);
kafka.javaapi.TopicMetadataResponse resp = consumer.send(req);
List<TopicMetadata> metaData = resp.topicsMetadata();
for (TopicMetadata item : metaData) {
for (PartitionMetadata part : item.partitionsMetadata()) {
if (part.partitionId() == a_partition) {
returnMetaData = part;
break loop;
}
}
}
} catch (Exception e) {
System.out.println(
"Error communicating with Broker ["
+ seed
+ "] to find Leader for ["
+ a_topic
+ ", "
+ a_partition
+ "] Reason: "
+ e);
} finally {
if (consumer != null) {
consumer.close();
}
}
}
if (returnMetaData != null) {
m_replicaBrokers.clear();
for (kafka.cluster.Broker replica : returnMetaData.replicas()) {
m_replicaBrokers.add(replica.host());
}
}
return returnMetaData;
}
public PartitionManager(int partition) {
_partition = partition;
ZooMeta zooMeta = (ZooMeta) _state.getData(committedPath());
SimpleConsumer consumer = _partitions.getConsumer(_partition);
int hostPartition = _partitions.getHostPartition(_partition);
// the id stuff makes sure the spout doesn't reset the offset if it restarts
// if(zooMeta==null || (!_uuid.equals(zooMeta.id) && _spoutConfig.forceFromStart)) {
if (zooMeta == null || (_spoutConfig.forceFromStart)) {
_committedTo =
consumer
.getOffsetsBefore(
_spoutConfig.topic, hostPartition, _spoutConfig.startOffsetTime, 1)[0];
} else {
_committedTo = zooMeta.offset;
}
_emittedToOffset = _committedTo;
}
/** consume data from kafka to list */
private void fill() {
SimpleConsumer consumer = _partitions.getConsumer(_partition);
int hostPartition = _partitions.getHostPartition(_partition);
ByteBufferMessageSet msgs =
consumer.fetch(
new FetchRequest(
_spoutConfig.topic,
hostPartition,
_emittedToOffset,
_spoutConfig.fetchSizeBytes));
// LOG.info("partition fill msgs " + msgs);
for (MessageAndOffset msg : msgs) {
_pending.add(_emittedToOffset);
_waitingToEmit.add(new MessageAndRealOffset(msg.message(), _emittedToOffset));
_emittedToOffset = msg.offset();
// LOG.info("parition fill msg " + msg + " offset" + _emittedToOffset);
}
}
public void close() throws IOException {
if (_consumer != null) _consumer.close();
String topic = _request.getTopic();
long endTime = System.currentTimeMillis();
_reporter.incrCounter(topic, "read-time(ms)", endTime - _startTime);
_reporter.incrCounter(topic, "request-time(ms)", _requestTime);
long bytesRead = _offset - _offsetRange[0];
double megaRead = bytesRead / (1024.0 * 1024.0);
_reporter.incrCounter(topic, "data-read(mb)", (long) megaRead);
_reporter.incrCounter(topic, "event-count", _count);
}
/** Get offset ranges */
protected long[] getOffsetRange() throws IOException {
/* get smallest and largest offsets*/
long[] range = new long[2];
long[] offsets =
_consumer.getOffsetsBefore(
_request.getTopic(), _request.getPartition(), OffsetRequest.EARLIEST_TIME(), 1);
if (offsets.length != 1)
throw new IOException(
"input:" + _input + " Expect one smallest offset but get " + offsets.length);
range[0] = offsets[0];
offsets =
_consumer.getOffsetsBefore(
_request.getTopic(), _request.getPartition(), OffsetRequest.LATEST_TIME(), 1);
if (offsets.length != 1)
throw new IOException(
"input:" + _input + " Expect one latest offset but get " + offsets.length);
range[1] = offsets[0];
/*adjust range based on input offsets*/
if (_request.isValidOffset()) {
long startOffset = _request.getOffset();
if (startOffset > range[0]) {
System.out.println("Update starting offset with " + startOffset);
range[0] = startOffset;
} else {
System.out.println(
"WARNING: given starting offset "
+ startOffset
+ " is smaller than the smallest one "
+ range[0]
+ ". Will ignore it.");
}
}
return range;
}
public boolean fetchMore() throws IOException {
if (!hasMore()) return false;
FetchRequest fetchRequest =
new FetchRequest(_request.getTopic(), _request.getPartition(), _offset, _bufferSize);
List<FetchRequest> array = new ArrayList<FetchRequest>();
array.add(fetchRequest);
long tempTime = System.currentTimeMillis();
_response = _consumer.multifetch(array);
_requestTime += (System.currentTimeMillis() - tempTime);
return true;
}
public long getOffset(String topic, int partition, long startOffsetTime) {
SimpleConsumer simpleConsumer = findLeaderConsumer(partition);
if (simpleConsumer == null) {
LOG.error("Error consumer is null get offset from partition:" + partition);
return -1;
}
TopicAndPartition topicAndPartition = new TopicAndPartition(topic, partition);
Map<TopicAndPartition, PartitionOffsetRequestInfo> requestInfo =
new HashMap<TopicAndPartition, PartitionOffsetRequestInfo>();
requestInfo.put(topicAndPartition, new PartitionOffsetRequestInfo(startOffsetTime, 1));
OffsetRequest request =
new OffsetRequest(
requestInfo, kafka.api.OffsetRequest.CurrentVersion(), simpleConsumer.clientId());
long[] offsets = simpleConsumer.getOffsetsBefore(request).offsets(topic, partition);
if (offsets.length > 0) {
return offsets[0];
} else {
return NO_OFFSET;
}
}
public static long getLastOffset(
SimpleConsumer consumer, String topic, int partition, long whichTime, String clientName) {
TopicAndPartition topicAndPartition = new TopicAndPartition(topic, partition);
Map<TopicAndPartition, PartitionOffsetRequestInfo> requestInfo =
new HashMap<TopicAndPartition, PartitionOffsetRequestInfo>();
requestInfo.put(topicAndPartition, new PartitionOffsetRequestInfo(whichTime, 1));
kafka.javaapi.OffsetRequest request =
new kafka.javaapi.OffsetRequest(
requestInfo, kafka.api.OffsetRequest.CurrentVersion(), clientName);
OffsetResponse response = consumer.getOffsetsBefore(request);
if (response.hasError()) {
System.out.println(
"Error fetching data Offset Data the Broker. Reason: "
+ response.errorCode(topic, partition));
return 0;
}
long[] offsets = response.offsets(topic, partition);
return offsets[0];
}
// @Ignore
@Test
public void test() throws EventDeliveryException, UnsupportedEncodingException {
Transaction tx = channel.getTransaction();
tx.begin();
ObjectNode jsonBody = new ObjectNode(JsonNodeFactory.instance);
jsonBody.put("myString", "foo");
jsonBody.put("myInt32", 32);
Map<String, String> headers = new HashMap<String, String>();
headers.put("myString", "bar");
headers.put("myInt64", "64");
headers.put("myBoolean", "true");
headers.put("myDouble", "1.0");
headers.put("myNull", "foobar");
Event event = EventBuilder.withBody(jsonBody.toString().getBytes(Charsets.UTF_8), headers);
channel.put(event);
tx.commit();
tx.close();
kafkaSink.process();
kafka.api.FetchRequest req =
new FetchRequestBuilder().clientId(CLIENT_ID).addFetch("test", 0, 0L, 100).build();
FetchResponse fetchResponse = simpleConsumer.fetch(req);
ByteBufferMessageSet messageSet = fetchResponse.messageSet("test", 0);
// Assert.assertTrue(messageSet.sizeInBytes() > 0);
for (MessageAndOffset messageAndOffset : messageSet) {
ByteBuffer payload = messageAndOffset.message().payload();
byte[] bytes = new byte[payload.limit()];
payload.get(bytes);
String message = new String(bytes, "UTF-8");
Assert.assertNotNull(message);
Assert.assertEquals(message, "{\"myString\":\"foo\",\"myInt32\":32}");
}
}
public boolean fetchMore() throws IOException {
if (!hasMore()) return false;
FetchRequest fetchRequest =
builder
.clientId(_request.clientId())
.addFetch(_request.getTopic(), _request.getPartition(), _offset, _bufferSize)
.build();
long tempTime = System.currentTimeMillis();
_response = _consumer.fetch(fetchRequest);
if (_response != null) {
_respIterator =
new ArrayList<ByteBufferMessageSet>() {
{
add(_response.messageSet(_request.getTopic(), _request.getPartition()));
}
}.iterator();
}
_requestTime += (System.currentTimeMillis() - tempTime);
return true;
}
public ByteBufferMessageSet fetchMessages(int partition, long offset) throws IOException {
String topic = config.topic;
FetchRequest req =
new FetchRequestBuilder()
.clientId(config.clientId)
.addFetch(topic, partition, offset, config.fetchMaxBytes)
.maxWait(config.fetchWaitMaxMs)
.build();
FetchResponse fetchResponse = null;
SimpleConsumer simpleConsumer = null;
try {
simpleConsumer = findLeaderConsumer(partition);
if (simpleConsumer == null) {
// LOG.error(message);
return null;
}
fetchResponse = simpleConsumer.fetch(req);
} catch (Exception e) {
if (e instanceof ConnectException
|| e instanceof SocketTimeoutException
|| e instanceof IOException
|| e instanceof UnresolvedAddressException) {
LOG.warn("Network error when fetching messages:", e);
if (simpleConsumer != null) {
String host = simpleConsumer.host();
int port = simpleConsumer.port();
simpleConsumer = null;
throw new KafkaException(
"Network error when fetching messages: " + host + ":" + port + " , " + e.getMessage(),
e);
}
} else {
throw new RuntimeException(e);
}
}
if (fetchResponse.hasError()) {
short code = fetchResponse.errorCode(topic, partition);
if (code == ErrorMapping.OffsetOutOfRangeCode() && config.resetOffsetIfOutOfRange) {
long startOffset = getOffset(topic, partition, config.startOffsetTime);
offset = startOffset;
}
if (leaderBroker != null) {
LOG.error(
"fetch data from kafka topic["
+ config.topic
+ "] host["
+ leaderBroker.host()
+ ":"
+ leaderBroker.port()
+ "] partition["
+ partition
+ "] error:"
+ code);
} else {
}
return null;
} else {
ByteBufferMessageSet msgs = fetchResponse.messageSet(topic, partition);
return msgs;
}
}
public void close() {
if (consumer != null) {
consumer.close();
}
}
protected PartitionMetadata findLeader(int partition) {
PartitionMetadata returnMetaData = null;
int errors = 0;
int size = brokerList.size();
Host brokerHost = brokerList.get(brokerIndex);
try {
if (consumer == null) {
consumer =
new SimpleConsumer(
brokerHost.getHost(),
brokerHost.getPort(),
config.socketTimeoutMs,
config.socketReceiveBufferBytes,
config.clientId);
}
} catch (Exception e) {
LOG.warn(e.getMessage(), e);
consumer = null;
}
int i = brokerIndex;
loop:
while (i < size && errors < size + 1) {
Host host = brokerList.get(i);
i = (i + 1) % size;
brokerIndex = i; // next index
try {
if (consumer == null) {
consumer =
new SimpleConsumer(
host.getHost(),
host.getPort(),
config.socketTimeoutMs,
config.socketReceiveBufferBytes,
config.clientId);
}
List<String> topics = Collections.singletonList(config.topic);
TopicMetadataRequest req = new TopicMetadataRequest(topics);
kafka.javaapi.TopicMetadataResponse resp = null;
try {
resp = consumer.send(req);
} catch (Exception e) {
errors += 1;
LOG.error(
"findLeader error, broker:"
+ host.toString()
+ ", will change to next broker index:"
+ (i + 1) % size);
if (consumer != null) {
consumer.close();
consumer = null;
}
continue;
}
List<TopicMetadata> metaData = resp.topicsMetadata();
for (TopicMetadata item : metaData) {
for (PartitionMetadata part : item.partitionsMetadata()) {
if (part.partitionId() == partition) {
returnMetaData = part;
break loop;
}
}
}
} catch (Exception e) {
LOG.error(
"Error communicating with Broker:"
+ host.toString()
+ ", find Leader for partition:"
+ partition);
} finally {
if (consumer != null) {
consumer.close();
consumer = null;
}
}
}
return returnMetaData;
}
public void run(
long a_maxReads, String a_topic, int a_partition, List<String> a_seedBrokers, int a_port)
throws Exception {
// find the meta data about the topic and partition we are interested in
//
PartitionMetadata metadata = findLeader(a_seedBrokers, a_port, a_topic, a_partition);
if (metadata == null) {
System.out.println("Can't find metadata for Topic and Partition. Exiting");
return;
}
if (metadata.leader() == null) {
System.out.println("Can't find Leader for Topic and Partition. Exiting");
return;
}
String leadBroker = metadata.leader().host();
String clientName = "Client_" + a_topic + "_" + a_partition;
SimpleConsumer consumer = new SimpleConsumer(leadBroker, a_port, 100000, 64 * 1024, clientName);
long readOffset =
getLastOffset(
consumer, a_topic, a_partition, kafka.api.OffsetRequest.EarliestTime(), clientName);
int numErrors = 0;
while (a_maxReads > 0) {
if (consumer == null) {
consumer = new SimpleConsumer(leadBroker, a_port, 100000, 64 * 1024, clientName);
}
FetchRequest req =
new FetchRequestBuilder()
.clientId(clientName)
.addFetch(
a_topic,
a_partition,
readOffset,
100000) // Note: this fetchSize of 100000 might need to
// be increased if large batches are written to
// Kafka
.build();
FetchResponse fetchResponse = consumer.fetch(req);
if (fetchResponse.hasError()) {
numErrors++;
// Something went wrong!
short code = fetchResponse.errorCode(a_topic, a_partition);
System.out.println(
"Error fetching data from the Broker:" + leadBroker + " Reason: " + code);
if (numErrors > 5) {
break;
}
if (code == ErrorMapping.OffsetOutOfRangeCode()) {
// We asked for an invalid offset. For simple case ask for the last element to reset
readOffset =
getLastOffset(
consumer, a_topic, a_partition, kafka.api.OffsetRequest.LatestTime(), clientName);
continue;
}
consumer.close();
consumer = null;
leadBroker = findNewLeader(leadBroker, a_topic, a_partition, a_port);
continue;
}
numErrors = 0;
long numRead = 0;
for (MessageAndOffset messageAndOffset : fetchResponse.messageSet(a_topic, a_partition)) {
long currentOffset = messageAndOffset.offset();
if (currentOffset < readOffset) {
System.out.println("Found an old offset: " + currentOffset + " Expecting: " + readOffset);
continue;
}
readOffset = messageAndOffset.nextOffset();
ByteBuffer payload = messageAndOffset.message().payload();
byte[] bytes = new byte[payload.limit()];
payload.get(bytes);
System.out.println(
String.valueOf(messageAndOffset.offset()) + ": " + new String(bytes, "UTF-8"));
numRead++;
a_maxReads--;
}
if (numRead == 0) {
try {
Thread.sleep(1000);
} catch (InterruptedException ie) {
}
}
}
if (consumer != null) {
consumer.close();
}
}
public void close() {
consumer.close();
}
