kafka.message.Message类的使用及代码示例

x33g5p2x  于2022-01-25 转载在 其他  
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本文整理了Java中kafka.message.Message类的一些代码示例，展示了Message类的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Message类的具体详情如下：
包路径：kafka.message.Message
类名称：Message

Message介绍

暂无

代码示例

代码示例来源：origin: Graylog2/graylog2-server

final MessageAndOffset messageAndOffset = iterator.next();
if (firstOffset == Long.MIN_VALUE) firstOffset = messageAndOffset.offset();
lastOffset = messageAndOffset.offset();
final byte[] payloadBytes = ByteBufferUtils.readBytes(messageAndOffset.message().payload());
if (LOG.isTraceEnabled()) {
  final byte[] keyBytes = ByteBufferUtils.readBytes(messageAndOffset.message().key());
  LOG.trace("Read message {} contains {}", bytesToHex(keyBytes), bytesToHex(payloadBytes));

代码示例来源：origin: Graylog2/graylog2-server

final Message newMessage = new Message(messageBytes, idBytes);

代码示例来源：origin: prestodb/presto

private boolean nextRow(MessageAndOffset messageAndOffset)
  cursorOffset = messageAndOffset.offset() + 1; // Cursor now points to the next message.
  totalBytes += messageAndOffset.message().payloadSize();
  totalMessages++;
  ByteBuffer key = messageAndOffset.message().key();
  if (key != null) {
    keyData = new byte[key.remaining()];
  ByteBuffer message = messageAndOffset.message().payload();
  if (message != null) {
    messageData = new byte[message.remaining()];

代码示例来源：origin: pinterest/secor

topicPartition.getTopic(), topicPartition.getPartition()).iterator().next();
byte[] keyBytes = null;
if (messageAndOffset.message().hasKey()) {
  ByteBuffer key = messageAndOffset.message().key();
  keyBytes = new byte[key.limit()];
  key.get(keyBytes);
if (!messageAndOffset.message().isNull()) {
  ByteBuffer payload = messageAndOffset.message().payload();
  payloadBytes = new byte[payload.limit()];
  payload.get(payloadBytes);

代码示例来源：origin: alibaba/jstorm

public EmitState emit(SpoutOutputCollector collector) {
  if (emittingMessages.isEmpty()) {
    fillMessages();
  }
  int count = 0;
  while (true) {
    MessageAndOffset toEmitMsg = emittingMessages.pollFirst();
    if (toEmitMsg == null) {
      return EmitState.EMIT_END;
    }
    count ++;
    Iterable<List<Object>> tups = generateTuples(toEmitMsg.message());
    if (tups != null) {
      for (List<Object> tuple : tups) {
        LOG.debug("emit message {}", new String(Utils.toByteArray(toEmitMsg.message().payload())));
        collector.emit(tuple, new KafkaMessageId(partition, toEmitMsg.offset()));
      }
      if(count>=config.batchSendCount) {
        break;
      }
    } else {
      ack(toEmitMsg.offset());
    }
  }
  if (emittingMessages.isEmpty()) {
    return EmitState.EMIT_END;
  } else {
    return EmitState.EMIT_MORE;
  }
}

代码示例来源：origin: apache/flink

if (running) {
  messagesInFetch++;
  final ByteBuffer payload = msg.message().payload();
  final long offset = msg.offset();
    LOG.info("Skipping message with offset " + msg.offset()
        + " because we have seen messages until (including) "
        + currentPartition.getOffset()
  int keySize = msg.message().keySize();
    ByteBuffer keyPayload = msg.message().key();
    keyBytes = new byte[keySize];
    keyPayload.get(keyBytes);

代码示例来源：origin: apache/incubator-pinot

public byte[] getMessageAtIndex(int index) {
 return messageList.get(index).message().payload().array();
}

代码示例来源：origin: linkedin/camus

/**
 * Fetches the next Kafka message and stuffs the results into the key and
 * value
 *
 * @param etlKey
 * @return true if there exists more events
 * @throws IOException
 */
public KafkaMessage getNext(EtlKey etlKey) throws IOException {
 if (hasNext()) {
  MessageAndOffset msgAndOffset = messageIter.next();
  Message message = msgAndOffset.message();
  byte[] payload = getBytes(message.payload());
  byte[] key = getBytes(message.key());
  if (payload == null) {
   log.warn("Received message with null message.payload(): " + msgAndOffset);
  }
  etlKey.clear();
  etlKey.set(kafkaRequest.getTopic(), kafkaRequest.getLeaderId(), kafkaRequest.getPartition(), currentOffset,
    msgAndOffset.offset() + 1, message.checksum());
  etlKey.setMessageSize(msgAndOffset.message().size());
  currentOffset = msgAndOffset.offset() + 1; // increase offset
  currentCount++; // increase count
  return new KafkaMessage(payload, key, kafkaRequest.getTopic(), kafkaRequest.getPartition(),
    msgAndOffset.offset(), message.checksum());
 } else {
  return null;
 }
}

代码示例来源：origin: apache/apex-malhar

private void initializeLastProcessingOffset()
{
 // read last received kafka message
 TopicMetadata tm = KafkaMetadataUtil.getTopicMetadata(Sets.newHashSet((String)getConfigProperties().get(KafkaMetadataUtil.PRODUCER_PROP_BROKERLIST)), this.getTopic());
 if (tm == null) {
  throw new RuntimeException("Failed to retrieve topic metadata");
 }
 partitionNum = tm.partitionsMetadata().size();
 lastMsgs = new HashMap<Integer, Pair<byte[],byte[]>>(partitionNum);
 for (PartitionMetadata pm : tm.partitionsMetadata()) {
  String leadBroker = pm.leader().host();
  int port = pm.leader().port();
  String clientName = this.getClass().getName().replace('$', '.') + "_Client_" + tm.topic() + "_" + pm.partitionId();
  SimpleConsumer consumer = new SimpleConsumer(leadBroker, port, 100000, 64 * 1024, clientName);
  long readOffset = KafkaMetadataUtil.getLastOffset(consumer, tm.topic(), pm.partitionId(), kafka.api.OffsetRequest.LatestTime(), clientName);
  FetchRequest req = new FetchRequestBuilder().clientId(clientName).addFetch(tm.topic(), pm.partitionId(), readOffset - 1, 100000).build();
  FetchResponse fetchResponse = consumer.fetch(req);
  for (MessageAndOffset messageAndOffset : fetchResponse.messageSet(tm.topic(), pm.partitionId())) {
   Message m = messageAndOffset.message();
   ByteBuffer payload = m.payload();
   ByteBuffer key = m.key();
   byte[] valueBytes = new byte[payload.limit()];
   byte[] keyBytes = new byte[key.limit()];
   payload.get(valueBytes);
   key.get(keyBytes);
   lastMsgs.put(pm.partitionId(), new Pair<byte[], byte[]>(keyBytes, valueBytes));
  }
 }
}

代码示例来源：origin: apache/incubator-gobblin

public Kafka08ConsumerRecord(MessageAndOffset messageAndOffset) {
 super(messageAndOffset.offset(), messageAndOffset.message().size());
 this.messageAndOffset = messageAndOffset;
}

代码示例来源：origin: alibaba/jstorm

@SuppressWarnings("unchecked")
public Iterable<List<Object>> generateTuples(Message msg) {
  Iterable<List<Object>> tups = null;
  ByteBuffer payload = msg.payload();
  if (payload == null) {
    return null;
  }
  tups = Arrays.asList(Utils.tuple(Utils.toByteArray(payload)));
  return tups;
}

代码示例来源：origin: apache/incubator-gobblin

@Override
public byte[] getKeyBytes() {
 return getBytes(this.messageAndOffset.message().key());
}

代码示例来源：origin: org.apache.storm/storm-kafka

public static Iterable<List<Object>> generateTuples(KafkaConfig kafkaConfig, Message msg, String topic) {
  Iterable<List<Object>> tups;
  ByteBuffer payload = msg.payload();
  if (payload == null) {
    return null;
  }
  ByteBuffer key = msg.key();
  if (key != null && kafkaConfig.scheme instanceof KeyValueSchemeAsMultiScheme) {
    tups = ((KeyValueSchemeAsMultiScheme) kafkaConfig.scheme).deserializeKeyAndValue(key, payload);
  } else {
    if (kafkaConfig.scheme instanceof StringMultiSchemeWithTopic) {
      tups = ((StringMultiSchemeWithTopic)kafkaConfig.scheme).deserializeWithTopic(topic, payload);
    } else {
      tups = kafkaConfig.scheme.deserialize(payload);
    }
  }
  return tups;
}

代码示例来源：origin: HomeAdvisor/Kafdrop

private MessageVO createMessage(Message message, MessageDeserializer deserializer)
{
 MessageVO vo = new MessageVO();
 if (message.hasKey())
 {
   vo.setKey(ByteUtils.readString(message.key()));
 }
 if (!message.isNull())
 {
   final String messageString = deserializer.deserializeMessage(message.payload());
   vo.setMessage(messageString);
 }
 vo.setValid(message.isValid());
 vo.setCompressionCodec(message.compressionCodec().name());
 vo.setChecksum(message.checksum());
 vo.setComputedChecksum(message.computeChecksum());
 return vo;
}

代码示例来源：origin: apache/incubator-pinot

public int getMessageLengthAtIndex(int index) {
 return messageList.get(index).message().payloadSize();
}

代码示例来源：origin: linkedin/camus

public void validate() throws IOException {
  // check the checksum of message.
  Message readMessage;
  if (key == null){
    readMessage = new Message(payload);
  } else {
    readMessage = new Message(payload, key);
  }
  if (checksum != readMessage.checksum()) {
    throw new ChecksumException("Invalid message checksum : " + readMessage.checksum() + ". Expected " + checksum,
        offset);
  }
}

代码示例来源：origin: org.apache.apex/malhar-contrib

final protected void putMessage(KafkaPartition partition, Message msg, long offset) throws InterruptedException{
 // block from receiving more message
 holdingBuffer.put(new KafkaMessage(partition, msg, offset));
 statsSnapShot.mark(partition, msg.payloadSize());
}

代码示例来源：origin: apache/apex-malhar

if ((emitCount > 0) && ((maxTotalMsgSizePerWindow - emitTotalMsgSize) < message.msg.size())) {
 pendingMessage = message;
 break;
emitTotalMsgSize += message.msg.size();
offsetStats.put(message.kafkaPart, message.offSet);
MutablePair<Long, Integer> offsetAndCount = currentWindowRecoveryState.get(message.kafkaPart);

代码示例来源：origin: co.cask.cdap/cdap-watchdog

/**
 * Fetches Kafka messages from an offset.
 * @param offset message offset to start.
 * @param callback callback to handle the messages fetched.
 * @return number of messages fetched.
 */
public int fetchMessages(long offset, Callback callback) throws OffsetOutOfRangeException {
 ByteBufferMessageSet messageSet = fetchMessageSet(offset);
 int msgCount = 0;
 for (MessageAndOffset msg : messageSet) {
  ++msgCount;
  callback.handle(msg.offset(), msg.message().payload());
 }
 return msgCount;
}

代码示例来源：origin: org.apache.flink/flink-connector-kafka-0.8_2.11

if (running) {
  messagesInFetch++;
  final ByteBuffer payload = msg.message().payload();
  final long offset = msg.offset();
    LOG.info("Skipping message with offset " + msg.offset()
        + " because we have seen messages until (including) "
        + currentPartition.getOffset()
  int keySize = msg.message().keySize();
    ByteBuffer keyPayload = msg.message().key();
    keyBytes = new byte[keySize];
    keyPayload.get(keyBytes);

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