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InsertFiles.php
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InsertFiles.php
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<?php
/**
* @copyright Copyright (c) 2017 Dmitry Bashkarev
* @license https://github.com/bashkarev/clickhouse/blob/master/LICENSE
* @link https://github.com/bashkarev/clickhouse#readme
*/
namespace bashkarev\clickhouse;
use Yii;
use yii\base\InvalidParamException;
use yii\db\Exception;
/**
* @author Dmitry Bashkarev <dmitry@bashkarev.com>
*/
class InsertFiles
{
/**
* @var int Maximum chunk size.
*/
protected $chunkSize = 4096;
/**
* @var Connection
*/
protected $db;
/**
* @var string
*/
protected $url;
/**
* @var string
*/
protected $sql;
/**
* @var array
*/
protected $files = [];
/**
* InsertFiles constructor.
* @param Connection $db
* @param string $table
* @param array $files
* @param array $columns
*/
public function __construct(Connection $db, $table, $files = [], $columns = [])
{
$this->db = $db;
$this->prepare($table, $columns);
if ($files !== []) {
$this->setFiles($files);
}
}
/**
* @param mixed $files
* @return $this
* @throws \Exception
*/
public function setFiles($files)
{
if (!is_array($files)) {
$files = (array)$files;
}
foreach ($files as $file) {
if (is_resource($file)) {
rewind($file);
} else {
$file = \Yii::getAlias($file);
if (file_exists($file) === false) {
throw new FileNotFoundException("File: `{$file}` not found");
}
}
$this->files[] = $file;
}
return $this;
}
/**
* @param int $size
* @return $this
*/
public function setChunkSize($size)
{
$size = (int)$size;
if ($size < 1) {
throw new InvalidParamException('The size must be greater than 0');
}
$this->chunkSize = $size;
return $this;
}
/**
* @return array
*/
public function getFiles()
{
return $this->files;
}
/**
* @param string $table
* @param array $columns
*/
protected function prepare($table, $columns)
{
$this->sql = 'INSERT INTO ' . $this->db->getSchema()->quoteTableName($table);
if ($columns !== []) {
$this->sql .= ' (' . implode(', ', $columns) . ')';
}
$this->sql .= ' FORMAT CSV';
$this->url = $this->db->getConfiguration()->prepareUrl(['query' => $this->sql]);
}
/**
* @param string|resource $file
* @return \Generator
*/
protected function runItem($file)
{
if (is_resource($file)) {
$closeFile = false;
$handle = $file;
$token = $this->sql . ' `' . $file . '`';
} else {
$closeFile = true;
$handle = fopen($file, 'rb');
$token = $this->sql . ' `' . basename($file) . '`';
}
Yii::info($token, 'bashkarev\clickhouse\Command::query');
Yii::beginProfile($token, 'bashkarev\clickhouse\Command::query');
$generator = $this->db->execute();
$generator->send("POST {$this->url} HTTP/1.1\r\n");
$generator->send("Transfer-Encoding: chunked\r\n\r\n");
while (true) {
$data = fread($handle, $this->chunkSize);
if ($data === false || ($length = strlen($data)) === 0) {
$generator->send("0\r\n\r\n");
$generator->send(false);
break 1;
}
$generator->send(dechex($length) . "\r\n");
$generator->send($data . "\r\n");
yield;
}
if ($closeFile === true) {
fclose($handle);
}
while ($generator->valid()) {
$generator->next();
yield;
}
Yii::endProfile($token, 'bashkarev\clickhouse\Command::query');
}
/**
* Execute
* @throws Exception
*/
public function execute()
{
$queue = new \SplQueue();
foreach ($this->files as $file) {
$queue->enqueue($this->runItem($file));
}
while (!$queue->isEmpty()) {
$task = $queue->dequeue();
$task->next();
if ($task->valid()) {
$queue->enqueue($task);
}
}
$this->files = [];
}
}