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| 1 | <?php |
| 2 | |
| 3 | namespace MediaWiki\Profiler; |
| 4 | |
| 5 | /** |
| 6 | * Class for tracking request-level classification information for profiling/stats/logging |
| 7 | * |
| 8 | * @note this avoids the use of MediaWikiServices so that shutdown functions can use it |
| 9 | * |
| 10 | * @since 1.40 |
| 11 | */ |
| 12 | class ProfilingContext { |
| 13 | private string $entryPoint = 'unknown'; |
| 14 | private string $handler = 'unknown'; |
| 15 | |
| 16 | private bool $initialized = false; |
| 17 | |
| 18 | private static ?ProfilingContext $instance = null; |
| 19 | |
| 20 | public static function singleton(): ProfilingContext { |
| 21 | self::$instance ??= new self(); |
| 22 | |
| 23 | return self::$instance; |
| 24 | } |
| 25 | |
| 26 | /** |
| 27 | * Set entry point name and principle handler name for this request |
| 28 | * |
| 29 | * @param string $entryPoint Entry point script name (alphanumeric characters) |
| 30 | * @param string $handler Handler name (printable ASCII characters) |
| 31 | */ |
| 32 | public function init( string $entryPoint, string $handler ) { |
| 33 | // Ignore nested nesting (e.g. rest.php handlers that use ApiMain) |
| 34 | if ( !$this->initialized ) { |
| 35 | $this->initialized = true; |
| 36 | $this->entryPoint = $entryPoint; |
| 37 | $this->handler = $handler; |
| 38 | } |
| 39 | } |
| 40 | |
| 41 | /** |
| 42 | * @return bool Whether the context was initialized yet |
| 43 | */ |
| 44 | public function isInitialized() { |
| 45 | return $this->initialized; |
| 46 | } |
| 47 | |
| 48 | /** |
| 49 | * @return string Entry point name for this request (e.g. "index", "api", "load") |
| 50 | */ |
| 51 | public function getEntryPoint(): string { |
| 52 | return $this->entryPoint; |
| 53 | } |
| 54 | |
| 55 | /** |
| 56 | * @return string Handler name for this request (e.g. "edit", "recentchanges") |
| 57 | */ |
| 58 | public function getHandler(): string { |
| 59 | return $this->handler; |
| 60 | } |
| 61 | |
| 62 | /** |
| 63 | * @return string Statsd metric name prefix for this entry point and handler |
| 64 | */ |
| 65 | public function getHandlerMetricPrefix(): string { |
| 66 | // Replace any characters that may have a special meaning in statsd/graphite |
| 67 | return $this->entryPoint . '_' . strtr( |
| 68 | $this->handler, |
| 69 | [ '{' => '', '}' => '', ':' => '_', '/' => '_', '.' => '_' ] |
| 70 | ); |
| 71 | } |
| 72 | |
| 73 | /** |
| 74 | * @internal For testing only |
| 75 | */ |
| 76 | public static function destroySingleton() { |
| 77 | self::$instance = null; |
| 78 | } |
| 79 | } |