List<Message> list = new ArrayList<Message>();
for (int i = 0; i < _count; i++) {
Long timestamp = RANDOM.nextLong();
if (timestamp < 0) timestamp = -timestamp;
byte[] bytes = timestamp.toString().getBytes("UTF8");
Message message = new Message(bytes);
list.add(message);
}
// send events
System.out.println(" send " + list.size() + " " + _topic + " count events to " + _uri);
_producer.send(_topic, new ByteBufferMessageSet(kafka.message.NoCompressionCodec$.MODULE$, list));