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<?php
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4 foldmethod=marker: */
// +---------------------------------------------------------------------------
// | SWAN [ $_SWANBR_SLOGAN_$ ]
// +---------------------------------------------------------------------------
// | Copyright $_SWANBR_COPYRIGHT_$
// +---------------------------------------------------------------------------
// | Version $_SWANBR_VERSION_$
// +---------------------------------------------------------------------------
// | Licensed ( $_SWANBR_LICENSED_URL_$ )
// +---------------------------------------------------------------------------
// | $_SWANBR_WEB_DOMAIN_$
// +---------------------------------------------------------------------------
namespace Kafka\Protocol\Fetch;
use \Kafka\Protocol\Decoder;
/**
+------------------------------------------------------------------------------
* Kafka protocol since Kafka v0.8
+------------------------------------------------------------------------------
*
* @package
* @version $_SWANBR_VERSION_$
* @copyright Copyleft
* @author $_SWANBR_AUTHOR_$
+------------------------------------------------------------------------------
*/
class Message
{
// {{{ members
/**
* crc32 code
*
* @var float
* @access private
*/
private $crc = 0;
/**
* This is a version id used to allow backwards compatible evolution of the
* message binary format.
*
* @var float
* @access private
*/
private $magic = 0;
/**
* The lowest 2 bits contain the compression codec used for the message. The
* other bits should be set to 0.
*
* @var float
* @access private
*/
private $attribute = 0;
/**
* message key
*
* @var string
* @access private
*/
private $key = '';
/**
* message value
*
* @var string
* @access private
*/
private $value = '';
// }}}
// {{{ functions
// {{{ public function __construct()
/**
* __construct
*
* @param string(raw) $msg
* @access public
*/
public function __construct($msg)
{
$offset = 0;
$crc = Decoder::unpack(Decoder::BIT_B32, substr($msg, $offset, 4));
$offset += 4;
$this->crc = array_shift($crc);
$magic = Decoder::unpack(Decoder::BIT_B8, substr($msg, $offset, 1));
$this->magic = array_shift($magic);
$offset += 1;
$attr = Decoder::unpack(Decoder::BIT_B8, substr($msg, $offset, 1));
$this->attribute = array_shift($attr);
$offset += 1;
$keyLen = Decoder::unpack(Decoder::BIT_B32, substr($msg, $offset, 4));
$keyLen = array_shift($keyLen);
$offset += 4;
if ($keyLen > 0 && $keyLen != 0xFFFFFFFF) {
$this->key = substr($msg, $offset, $keyLen);
$offset += $keyLen;
}
$messageSize = Decoder::unpack(Decoder::BIT_B32, substr($msg, $offset, 4));
$messageSize = array_shift($messageSize);
$offset += 4;
if ($messageSize) {
$this->value = substr($msg, $offset, $messageSize);
}
}
// }}}
// {{{ public function getMessage()
/**
* get message data
*
* @access public
* @return string (raw)
*/
public function getMessage()
{
return $this->value;
}
// }}}
// {{{ public function getMessageKey()
/**
* get message key
*
* @access public
* @return string (raw)
*/
public function getMessageKey()
{
return $this->key;
}
// }}}
// {{{ public function __toString()
/**
* __toString
*
* @access public
* @return string (raw)
*/
public function __toString()
{
return $this->value;
}
// }}}
// }}}
}
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