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<?php
namespace SMW\ParserFunctions;
use SMW\ParserData;
use SMWQuery as Query;
/**
* @private
*
* @license GNU GPL v2+
* @since 3.0
*
* @author mwjames
*/
class ExpensiveFuncExecutionWatcher {
/**
* Idenitifer
*/
const EXPENSIVE_COUNTER = 'smw-expensiveparsercount';
/**
* @var ParserData
*/
private $parserData;
/**
* @var integer
*/
private $expensiveThreshold = 10;
/**
* @var integer|boolean
*/
private $expensiveExecutionLimit = false;
/**
* @since 3.0
*
* @param ParserData $parserData
*/
public function __construct( ParserData $parserData ) {
$this->parserData = $parserData;
}
/**
* @since 3.0
*
* @param integer $expensiveThreshold
*/
public function setExpensiveThreshold( $expensiveThreshold ) {
$this->expensiveThreshold = $expensiveThreshold;
}
/**
* @since 3.0
*
* @param integer|boolean $expensiveExecutionLimit
*/
public function setExpensiveExecutionLimit( $expensiveExecutionLimit ) {
$this->expensiveExecutionLimit = $expensiveExecutionLimit;
}
/**
* @since 3.0
*
* @param Query $query
*
* @return boolean
*/
public function hasReachedExpensiveLimit( Query $query ) {
if ( $this->expensiveExecutionLimit === false ) {
return false;
}
if ( $query->getLimit() == 0 ) {
return false;
}
if ( $this->parserData->getOutput()->getExtensionData( self::EXPENSIVE_COUNTER ) < $this->expensiveExecutionLimit ) {
return false;
}
return true;
}
/**
* @since 3.0
*
* @param Query $query
*
* @return boolean
*/
public function incrementExpensiveCount( Query $query ) {
if ( $this->expensiveExecutionLimit === false || $query->getLimit() == 0 || $query->getOption( Query::PROC_QUERY_TIME ) < $this->expensiveThreshold ) {
return;
}
$output = $this->parserData->getOutput();
$expensiveCount = $output->getExtensionData( self::EXPENSIVE_COUNTER );
if ( !is_int( $expensiveCount ) ) {
$expensiveCount = 0;
}
$expensiveCount++;
$output->setExtensionData( self::EXPENSIVE_COUNTER, $expensiveCount );
}
}
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