Kafka\Protocol\Fetch\Partition::loadNextPartition PHP Method

    public function loadNextPartition()
    {
        if ($this->validCount >= $this->partitionCount) {
            return false;
        }
        try {
            $partitionId = $this->stream->read(4, true);
            $partitionId = Decoder::unpack(Decoder::BIT_B32, $partitionId);
            $partitionId = array_shift($partitionId);
            \Kafka\Log::log("kafka client:fetch partition:" . $partitionId, LOG_INFO);
            $errCode = $this->stream->read(2, true);
            $errCode = Decoder::unpack(Decoder::BIT_B16, $errCode);
            $this->errCode = array_shift($errCode);
            if ($this->errCode != 0) {
                throw new \Kafka\Exception(\Kafka\Protocol\Decoder::getError($this->errCode));
            }
            $offset = $this->stream->read(8, true);
            $this->offset = \Kafka\Protocol\Decoder::unpack(Decoder::BIT_B64, $offset);
            $this->key = $partitionId;
            $this->current = new MessageSet($this, $this->context);
        } catch (\Kafka\Exception $e) {
            \Kafka\Log::log($e->getMessage(), LOG_ERR);
            return false;
        }
        $this->validCount++;
        return true;
    }