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<?php
namespace W3TC;
/**
* Provides statistics data about requests made to mysql server
*/
class UsageStatistics_Source_Wpdb {
private $query_total = 0;
static public function init() {
$o = new UsageStatistics_Source_Wpdb();
add_filter( 'query', array( $o, 'query' ) );
add_action( 'w3tc_usage_statistics_of_request', array(
$o, 'w3tc_usage_statistics_of_request' ), 10, 1 );
add_filter( 'w3tc_usage_statistics_metrics', array(
$o, 'w3tc_usage_statistics_metrics' ) );
add_filter( 'w3tc_usage_statistics_summary_from_history', array(
$o, 'w3tc_usage_statistics_summary_from_history' ), 10, 2 );
}
public function w3tc_usage_statistics_metrics( $metrics ) {
return array_merge( $metrics, array( 'wpdb_calls_total' ) );
}
public function w3tc_usage_statistics_summary_from_history( $summary, $history ) {
// counters
$wpdb_calls_total = Util_UsageStatistics::sum( $history,
'wpdb_calls_total' );
$summary['wpdb'] = array(
'calls_total' => Util_UsageStatistics::integer(
$wpdb_calls_total ),
'calls_per_second' => Util_UsageStatistics::value_per_period_seconds(
$wpdb_calls_total, $summary )
);
return $summary;
}
public function w3tc_usage_statistics_of_request( $storage ) {
$storage->counter_add( 'wpdb_calls_total', $this->query_total );
}
public function query( $q ) {
$this->query_total++;
return $q;
}
}