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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;
/**
+------------------------------------------------------------------------------
* Kafka protocol since Kafka v0.8
+------------------------------------------------------------------------------
*
* @package
* @version $_SWANBR_VERSION_$
* @copyright Copyleft
* @author $_SWANBR_AUTHOR_$
+------------------------------------------------------------------------------
*/
class Decoder extends Protocol
{
// {{{ functions
// {{{ public function produceResponse()
/**
* decode produce response
*
* @param string $data
* @access public
* @return array
*/
public function produceResponse()
{
$result = array();
$dataLen = self::unpack(self::BIT_B32, $this->stream->read(4, true));
$dataLen = array_shift($dataLen);
if (!$dataLen) {
throw new \Kafka\Exception\Protocol('produce response invalid.');
}
$data = $this->stream->read($dataLen, true);
// parse data struct
$offset = 4;
$topicCount = self::unpack(self::BIT_B32, substr($data, $offset, 4));
$topicCount = array_shift($topicCount);
$offset += 4;
for ($i = 0; $i < $topicCount; $i++) {
$topicLen = self::unpack(self::BIT_B16, substr($data, $offset, 2)); // int16 topic name length
$topicLen = isset($topicLen[1]) ? $topicLen[1] : 0;
$offset += 2;
$topicName = substr($data, $offset, $topicLen);
$offset += $topicLen;
$partitionCount = self::unpack(self::BIT_B32, substr($data, $offset, 4));
$partitionCount = isset($partitionCount[1]) ? $partitionCount[1] : 0;
$offset += 4;
$result[$topicName] = array();
for ($j = 0; $j < $partitionCount; $j++) {
$partitionId = self::unpack(self::BIT_B32, substr($data, $offset, 4));
$offset += 4;
$errCode = self::unpack(self::BIT_B16, substr($data, $offset, 2));
$offset += 2;
$partitionOffset = self::unpack(self::BIT_B64, substr($data, $offset, 8));
$offset += 8;
$result[$topicName][$partitionId[1]] = array(
'errCode' => $errCode[1],
'offset' => $partitionOffset
);
}
}
return $result;
}
// }}}
// {{{ public function fetchResponse()
/**
* decode fetch response
*
* @param string $data
* @access public
* @return Iterator
*/
public function fetchResponse()
{
return new \Kafka\Protocol\Fetch\Topic($this->stream);
}
// }}}
// {{{ public function metadataResponse()
/**
* decode metadata response
*
* @param string $data
* @access public
* @return array
*/
public function metadataResponse()
{
$result = array();
$broker = array();
$topic = array();
$dataLen = self::unpack(self::BIT_B32, $this->stream->read(4, true));
$dataLen = array_shift($dataLen);
if (!$dataLen) {
throw new \Kafka\Exception\Protocol('metaData response invalid.');
}
$data = $this->stream->read($dataLen, true);
$offset = 4;
$brokerCount = self::unpack(self::BIT_B32, substr($data, $offset, 4));
$offset += 4;
$brokerCount = isset($brokerCount[1]) ? $brokerCount[1] : 0;
for ($i = 0; $i < $brokerCount; $i++) {
$nodeId = self::unpack(self::BIT_B32, substr($data, $offset, 4));
$nodeId = $nodeId[1];
$offset += 4;
$hostNameLen = self::unpack(self::BIT_B16, substr($data, $offset, 2)); // int16 host name length
$hostNameLen = isset($hostNameLen[1]) ? $hostNameLen[1] : 0;
$offset += 2;
$hostName = substr($data, $offset, $hostNameLen);
$offset += $hostNameLen;
$port = self::unpack(self::BIT_B32, substr($data, $offset, 4));
$offset += 4;
$broker[$nodeId] = array(
'host' => $hostName,
'port' => $port[1],
);
}
$topicMetaCount = self::unpack(self::BIT_B32, substr($data, $offset, 4));
$offset += 4;
$topicMetaCount = isset($topicMetaCount[1]) ? $topicMetaCount[1] : 0;
for ($i = 0; $i < $topicMetaCount; $i++) {
$topicErrCode = self::unpack(self::BIT_B16, substr($data, $offset, 2));
$offset += 2;
$topicLen = self::unpack(self::BIT_B16, substr($data, $offset, 2));
$offset += 2;
$topicName = substr($data, $offset, $topicLen[1]);
$offset += $topicLen[1];
$partitionCount = self::unpack(self::BIT_B32, substr($data, $offset, 4));
$offset += 4;
$partitionCount = isset($partitionCount[1]) ? $partitionCount[1] : 0;
$topic[$topicName]['errCode'] = $topicErrCode[1];
$partitions = array();
for ($j = 0; $j < $partitionCount; $j++) {
$partitionErrCode = self::unpack(self::BIT_B16, substr($data, $offset, 2));
$offset += 2;
$partitionId = self::unpack(self::BIT_B32, substr($data, $offset, 4));
$partitionId = isset($partitionId[1]) ? $partitionId[1] : 0;
$offset += 4;
$leaderId = self::unpack(self::BIT_B32, substr($data, $offset, 4));
$offset += 4;
$repliasCount = self::unpack(self::BIT_B32, substr($data, $offset, 4));
$offset += 4;
$repliasCount = isset($repliasCount[1]) ? $repliasCount[1] : 0;
$replias = array();
for ($z = 0; $z < $repliasCount; $z++) {
$repliaId = self::unpack(self::BIT_B32, substr($data, $offset, 4));
$offset += 4;
$replias[] = $repliaId[1];
}
$isrCount = self::unpack(self::BIT_B32, substr($data, $offset, 4));
$offset += 4;
$isrCount = isset($isrCount[1]) ? $isrCount[1] : 0;
$isrs = array();
for ($z = 0; $z < $isrCount; $z++) {
$isrId = self::unpack(self::BIT_B32, substr($data, $offset, 4));
$offset += 4;
$isrs[] = $isrId[1];
}
$partitions[$partitionId] = array(
'errCode' => $partitionErrCode[1],
'leader' => $leaderId[1],
'replicas' => $replias,
'isr' => $isrs,
);
}
$topic[$topicName]['partitions'] = $partitions;
}
$result = array(
'brokers' => $broker,
'topics' => $topic,
);
return $result;
}
// }}}
// {{{ public function offsetResponse()
/**
* decode offset response
*
* @param string $data
* @access public
* @return array
*/
public function offsetResponse()
{
$result = array();
$dataLen = self::unpack(self::BIT_B32, $this->stream->read(4, true));
$dataLen = array_shift($dataLen);
if (!$dataLen) {
throw new \Kafka\Exception\Protocol('offset response invalid.');
}
$data = $this->stream->read($dataLen, true);
$offset = 4;
$topicCount = self::unpack(self::BIT_B32, substr($data, $offset, 4));
$offset += 4;
$topicCount = array_shift($topicCount);
for ($i = 0; $i < $topicCount; $i++) {
$topicLen = self::unpack(self::BIT_B16, substr($data, $offset, 2)); // int16 topic name length
$topicLen = isset($topicLen[1]) ? $topicLen[1] : 0;
$offset += 2;
$topicName = substr($data, $offset, $topicLen);
$offset += $topicLen;
$partitionCount = self::unpack(self::BIT_B32, substr($data, $offset, 4));
$partitionCount = isset($partitionCount[1]) ? $partitionCount[1] : 0;
$offset += 4;
$result[$topicName] = array();
for ($j = 0; $j < $partitionCount; $j++) {
$partitionId = self::unpack(self::BIT_B32, substr($data, $offset, 4));
$offset += 4;
$errCode = self::unpack(self::BIT_B16, substr($data, $offset, 2));
$offset += 2;
$offsetCount = self::unpack(self::BIT_B32, substr($data, $offset, 4));
$offset += 4;
$offsetCount = array_shift($offsetCount);
$offsetArr = array();
for ($z = 0; $z < $offsetCount; $z++) {
$offsetArr[] = self::unpack(self::BIT_B64, substr($data, $offset, 8));
$offset += 8;
}
$result[$topicName][$partitionId[1]] = array(
'errCode' => $errCode[1],
'offset' => $offsetArr
);
}
}
return $result;
}
// }}}
// {{{ public function commitOffsetResponse()
/**
* decode commit offset response
*
* @param string $data
* @access public
* @return array
*/
public function commitOffsetResponse()
{
$result = array();
$dataLen = self::unpack(self::BIT_B32, $this->stream->read(4, true));
$dataLen = array_shift($dataLen);
if (!$dataLen) {
throw new \Kafka\Exception\Protocol('commit offset response invalid.');
}
$data = $this->stream->read($dataLen, true);
$offset = 4;
$topicCount = self::unpack(self::BIT_B32, substr($data, $offset, 4));
$offset += 4;
$topicCount = array_shift($topicCount);
for ($i = 0; $i < $topicCount; $i++) {
$topicLen = self::unpack(self::BIT_B16, substr($data, $offset, 2)); // int16 topic name length
$topicLen = isset($topicLen[1]) ? $topicLen[1] : 0;
$offset += 2;
$topicName = substr($data, $offset, $topicLen);
$offset += $topicLen;
$partitionCount = self::unpack(self::BIT_B32, substr($data, $offset, 4));
$partitionCount = isset($partitionCount[1]) ? $partitionCount[1] : 0;
$offset += 4;
$result[$topicName] = array();
for ($j = 0; $j < $partitionCount; $j++) {
$partitionId = self::unpack(self::BIT_B32, substr($data, $offset, 4));
$offset += 4;
$errCode = self::unpack(self::BIT_B16, substr($data, $offset, 2));
$offset += 2;
$result[$topicName][$partitionId[1]] = array(
'errCode' => $errCode[1],
);
}
}
return $result;
}
// }}}
// {{{ public function fetchOffsetResponse()
/**
* decode fetch offset response
*
* @param string $data
* @access public
* @return array
*/
public function fetchOffsetResponse()
{
$result = array();
$dataLen = self::unpack(self::BIT_B32, $this->stream->read(4, true));
$dataLen = array_shift($dataLen);
if (!$dataLen) {
throw new \Kafka\Exception\Protocol('fetch offset response invalid.');
}
$data = $this->stream->read($dataLen, true);
$offset = 4;
$topicCount = self::unpack(self::BIT_B32, substr($data, $offset, 4));
$offset += 4;
$topicCount = array_shift($topicCount);
for ($i = 0; $i < $topicCount; $i++) {
$topicLen = self::unpack(self::BIT_B16, substr($data, $offset, 2)); // int16 topic name length
$topicLen = isset($topicLen[1]) ? $topicLen[1] : 0;
$offset += 2;
$topicName = substr($data, $offset, $topicLen);
$offset += $topicLen;
$partitionCount = self::unpack(self::BIT_B32, substr($data, $offset, 4));
$partitionCount = isset($partitionCount[1]) ? $partitionCount[1] : 0;
$offset += 4;
$result[$topicName] = array();
for ($j = 0; $j < $partitionCount; $j++) {
$partitionId = self::unpack(self::BIT_B32, substr($data, $offset, 4));
$offset += 4;
$partitionOffset = self::unpack(self::BIT_B64, substr($data, $offset, 8));
$offset += 8;
$metaLen = self::unpack(self::BIT_B16, substr($data, $offset, 2));
$metaLen = array_shift($metaLen);
$offset += 2;
$metaData = '';
if ($metaLen) {
$metaData = substr($data, $offset, $metaLen);
$offset += $metaLen;
}
$errCode = self::unpack(self::BIT_B16, substr($data, $offset, 2));
$offset += 2;
$result[$topicName][$partitionId[1]] = array(
'offset' => $partitionOffset,
'metadata' => $metaData,
'errCode' => $errCode[1],
);
}
}
return $result;
}
// }}}
// {{{ public static function getError()
/**
* get error
*
* @param integer $errCode
* @static
* @access public
* @return string
*/
public static function getError($errCode)
{
$error = '';
switch($errCode) {
case 0:
$error = 'No error--it worked!';
break;
case -1:
$error = 'An unexpected server error';
break;
case 1:
$error = 'The requested offset is outside the range of offsets maintained by the server for the given topic/partition.';
break;
case 2:
$error = 'This indicates that a message contents does not match its CRC';
break;
case 3:
$error = 'This request is for a topic or partition that does not exist on this broker.';
break;
case 4:
$error = 'The message has a negative size';
break;
case 5:
$error = 'This error is thrown if we are in the middle of a leadership election and there is currently no leader for this partition and hence it is unavailable for writes';
break;
case 6:
$error = 'This error is thrown if the client attempts to send messages to a replica that is not the leader for some partition. It indicates that the clients metadata is out of date.';
break;
case 7:
$error = 'This error is thrown if the request exceeds the user-specified time limit in the request.';
break;
case 8:
$error = 'This is not a client facing error and is used only internally by intra-cluster broker communication.';
break;
case 10:
$error = 'The server has a configurable maximum message size to avoid unbounded memory allocation. This error is thrown if the client attempt to produce a message larger than this maximum.';
break;
case 11:
$error = 'Internal error code for broker-to-broker communication.';
break;
case 12:
$error = 'If you specify a string larger than configured maximum for offset metadata';
break;
case 14:
$error = 'The broker returns this error code for an offset fetch request if it is still loading offsets (after a leader change for that offsets topic partition).';
break;
case 15:
$error = 'The broker returns this error code for consumer metadata requests or offset commit requests if the offsets topic has not yet been created.';
break;
case 16:
$error = 'The broker returns this error code if it receives an offset fetch or commit request for a consumer group that it is not a coordinator for.';
break;
default:
$error = 'Unknown error';
}
return $error;
}
// }}}
// }}}
}
|
