/**
* Read the next message
*
* @return string Message (raw)
* @throws Kafka_Exception when the message cannot be read from the stream buffer
*/
protected function getMessage()
{
try {
$size = $this->getMessageSize();
$msg = $this->socket->read($size, true);
} catch (Kafka_Exception_Socket_EOF $e) {
$size = isset($size) ? $size : 'enough';
$logMsg = 'Cannot read ' . $size . ' bytes, the message is likely bigger than the buffer';
throw new Kafka_Exception_OutOfRange($logMsg);
}
$this->validByteCount += 4 + $size;
return $msg;
}
/**
* Read the response error code
*
* @return integer Error code
*/
protected function getResponseCode()
{
$this->connect();
$data = $this->socket->read(2, true);
$unpack = unpack('n', $data);
return array_shift($unpack);
}
/**
* Parse the response and return the array of offsets
*
* @param Kafka_Socket $socket Socket handle
*
* @return array
*/
public static function deserializeOffsetArray(Kafka_Socket $socket)
{
$nOffsets = array_shift(unpack('N', $socket->read(4)));
if ($nOffsets < 0) {
throw new Kafka_Exception_OutOfRange($nOffsets . ' is not a valid number of offsets');
}
$offsets = array();
for ($i = 0; $i < $nOffsets; ++$i) {
$offsets[] = self::unpackLong64bigendian($socket->read(8));
}
return $offsets;
}
/**
* Read the response error code
*
* @return integer Error code
*/
protected function getResponseCode()
{
$this->connect();
return array_shift(unpack('n', $this->socket->read(2, true)));
}
