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<?php |
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declare(strict_types=1); |
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namespace Seasx\SeasLogger\Kafka; |
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use Exception; |
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use function is_string; |
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use function substr; |
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class Metadata extends Protocol |
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{ |
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/** |
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* @param array $payloads |
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* @return string |
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* @throws Exception |
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*/ |
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public function encode(array $payloads = []): string |
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{ |
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foreach ($payloads as $topic) { |
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if (!is_string($topic)) { |
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throw new Exception('request metadata topic array have invalid value. '); |
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} |
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} |
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$header = $this->requestHeader('seaslog-kafka', self::METADATA_REQUEST, self::METADATA_REQUEST); |
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$data = self::encodeArray($payloads, [$this, 'encodeString'], self::PACK_INT16); |
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$data = self::encodeString($header . $data, self::PACK_INT32); |
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return $data; |
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} |
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/** |
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* @param string $data |
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* @return array |
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* @throws Exception |
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*/ |
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public function decode(string $data): array |
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{ |
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$offset = 0; |
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$brokerRet = $this->decodeArray(substr($data, $offset), [$this, 'metaBroker']); |
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$offset += $brokerRet['length']; |
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$topicMetaRet = $this->decodeArray(substr($data, $offset), [$this, 'metaTopicMetaData']); |
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$offset += $topicMetaRet['length']; |
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$result = [ |
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'brokers' => $brokerRet['data'], |
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'topics' => $topicMetaRet['data'], |
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]; |
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return $result; |
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} |
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/** |
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* @param string $data |
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* @return array |
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* @throws Exception |
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*/ |
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protected function metaBroker(string $data): array |
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{ |
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$offset = 0; |
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$nodeId = self::unpack(self::BIT_B32, substr($data, $offset, 4)); |
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$offset += 4; |
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$hostNameInfo = $this->decodeString(substr($data, $offset), self::BIT_B16); |
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$offset += $hostNameInfo['length']; |
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$port = self::unpack(self::BIT_B32, substr($data, $offset, 4)); |
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$offset += 4; |
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return [ |
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'length' => $offset, |
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'data' => [ |
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'host' => $hostNameInfo['data'], |
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'port' => $port, |
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'nodeId' => $nodeId, |
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], |
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]; |
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} |
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/** |
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* @param string $data |
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* @return array |
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* @throws Exception |
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*/ |
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protected function metaTopicMetaData(string $data): array |
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{ |
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$offset = 0; |
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$topicErrCode = self::unpack(self::BIT_B16_SIGNED, substr($data, $offset, 2)); |
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$offset += 2; |
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$topicInfo = $this->decodeString(substr($data, $offset), self::BIT_B16); |
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$offset += $topicInfo['length']; |
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$partitionsMeta = $this->decodeArray(substr($data, $offset), [$this, 'metaPartitionMetaData']); |
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$offset += $partitionsMeta['length']; |
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return [ |
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'length' => $offset, |
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'data' => [ |
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'topicName' => $topicInfo['data'], |
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'errorCode' => $topicErrCode, |
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'partitions' => $partitionsMeta['data'], |
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], |
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]; |
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} |
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/** |
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* @param string $data |
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* @return array |
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* @throws Exception |
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*/ |
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protected function metaPartitionMetaData(string $data): array |
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{ |
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$offset = 0; |
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$errcode = self::unpack(self::BIT_B16_SIGNED, substr($data, $offset, 2)); |
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$offset += 2; |
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$partId = self::unpack(self::BIT_B32, substr($data, $offset, 4)); |
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$offset += 4; |
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$leader = self::unpack(self::BIT_B32, substr($data, $offset, 4)); |
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$offset += 4; |
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$replicas = $this->decodePrimitiveArray(substr($data, $offset), self::BIT_B32); |
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$offset += $replicas['length']; |
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$isr = $this->decodePrimitiveArray(substr($data, $offset), self::BIT_B32); |
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$offset += $isr['length']; |
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return [ |
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'length' => $offset, |
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'data' => [ |
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'partitionId' => $partId, |
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'errorCode' => $errcode, |
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'replicas' => $replicas['data'], |
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'leader' => $leader, |
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'isr' => $isr['data'], |
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], |
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]; |
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} |
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} |
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SeasX /
seas-logger
