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<?php |
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namespace BfwSql; |
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/** |
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* Requests observer. |
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* Create a log with all EXPLAIN informations about SELECT requests executed. |
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* |
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* @package bfw-sql |
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* @author Vermeulen Maxime <[email protected]> |
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* @version 2.0 |
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*/ |
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class SqlObserver implements \SplObserver |
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{ |
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/** |
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* @var \SplFileObject $logFile The SplFileObject instance for the log file |
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*/ |
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protected $logFile; |
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/** |
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* @var \stdClass $observerConfig The "observer" part in config file |
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*/ |
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protected $observerConfig; |
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/** |
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* @var string $action The last action to send to observers |
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*/ |
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protected $action = ''; |
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/** |
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* @var mixed $context The context to send to observers |
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*/ |
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protected $context = null; |
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/** |
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* Constructor |
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* |
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* @param \stdClass $observerConfig The "observer" part in config file |
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*/ |
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public function __construct($observerConfig) |
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{ |
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$this->observerConfig = $observerConfig; |
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$this->logFile = new \SplFileObject($observerConfig->logFile, 'a+b'); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function update(\SplSubject $subject) |
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{ |
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$this->action = $subject->getAction(); |
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$this->context = $subject->getContext(); |
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$this->analyzeUpdate(); |
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} |
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/** |
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* Analyze the update sent by subjects to search if the notify is for us |
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* |
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* @return void |
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*/ |
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protected function analyzeUpdate() |
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{ |
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if ($this->action !== 'BfwSqlRequest') { |
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return; |
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} |
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if (get_class($this->context) !== '\BfwSql\SqlSelect') { |
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return; |
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} |
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$this->runRequests(); |
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} |
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/** |
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* Run all requests to get informations about the SELECT request |
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* |
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* @return void |
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*/ |
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protected function runRequests() |
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{ |
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$this->addToLogFile('************* DEBUT OPTIMIZE SQL *************'); |
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$this->addToLogFile('BackTrace : '.print_r($this->obtainBackTrace(), true)); |
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$this->addToLogFile('Requête SQL : '.$this->context->assemble()); |
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$sqlConnect = $this->context->getSqlConnect(); |
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$requestObj = new Sql($sqlConnect); |
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$this->runExplain($requestObj); |
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$this->runShowStatus($requestObj); |
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$this->addToLogFile('************* FIN OPTIMIZE SQL *************'); |
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$this->addEmptyLineToLogFile(); |
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} |
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/** |
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* Obtain the backtrace to know informations about the caller of the |
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* sql request. |
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* |
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* @return string[] |
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*/ |
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protected function obtainBackTrace() |
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{ |
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$backtrace = []; |
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$backtraceInfos = debug_backtrace(); |
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foreach($backtraceInfos as $trace) |
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{ |
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$backtrace[] = $trace['file'].' : '.$trace['line']; |
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} |
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return $backtrace; |
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} |
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/** |
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* Add a message to the observer log file |
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* |
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* @param string $message |
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* |
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* @return void |
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*/ |
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protected function addToLogFile($message) |
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{ |
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$dateTime = new \DateTime; |
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$messageDate = $dateTime->format('Y-m-d H:i:s'); |
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$this->logFile->fwrite('['.$messageDate.'] '.$message."\n"); |
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} |
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/** |
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* Add a empty line to the log file |
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* |
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* @return void |
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*/ |
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protected function addEmptyLineToLogFile() |
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{ |
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$this->logFile->fwrite("\n"); |
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} |
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/** |
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* Run the EXPLAIN request and send informations to log file |
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* |
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* @param \BfwSql\Sql $requestObj |
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* |
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* @return void |
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*/ |
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protected function runExplain(\BfwSql\Sql $requestObj) |
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{ |
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$requestObj->query('FLUSH STATUS;'); |
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$explainQuery = 'EXPLAIN '.$this->context->assemble(); |
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$explainResult = $requestObj->query($explainQuery); |
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if ($explainResult === false) { |
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$this->addToLogFile('EXPLAIN failed'); |
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return; |
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} |
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$explainFetchAll = $explainResult->fetchAll(); |
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if (!isset($explainFetchAll[0])) { |
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$this->addToLogFile('EXPLAIN VIDE'); |
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return; |
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} |
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$explainDatas = []; |
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foreach($explainFetchAll[0] as $explainKey => $explainValue) { |
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if (is_numeric($explainValue)) { |
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continue; |
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} |
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$explainDatas[$explainKey] = $explainValue; |
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} |
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$this->addToLogFile(print_r($explainDatas, true)); |
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} |
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/** |
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* Run the SHOW STATUS request and send informations to log file |
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* |
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* @param \BfwSql\Sql $requestObj |
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* |
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* @return void |
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*/ |
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protected function runShowStatus(\BfwSql\Sql $requestObj) |
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{ |
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$statusResult = $requestObj->query('SHOW STATUS'); |
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if ($statusResult === false) { |
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$this->addToLogFile('SHOW STATUS failed'); |
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return; |
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} |
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$statusFetchAll = $statusResult->fetchAll(); |
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if (empty($statusFetchAll)) { |
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$this->addToLogFile('EXPLAIN VIDE'); |
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return; |
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} |
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$statusDatas = []; |
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foreach($statusFetchAll as $statusRow) { |
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$statusKey = $statusRow['Variable_name']; |
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$statusValue = $statusRow['Value']; |
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if ( |
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substr($statusKey, 0, 8) === 'Created_' |
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|| substr($statusKey, 0, 8) === 'Handler_' |
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) { |
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$statusDatas[$statusKey] = $statusValue; |
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} |
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} |
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$this->addToLogFile(print_r($statusDatas, true)); |
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} |
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} |
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bulton-fr /
bfw-sql
