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<?php |
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namespace Krenor\Prometheus\Metrics; |
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use Krenor\Prometheus\Contracts\Storage; |
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use Tightenco\Collect\Support\Collection; |
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use Krenor\Prometheus\Exceptions\LabelException; |
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use Krenor\Prometheus\Exceptions\PrometheusException; |
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use Krenor\Prometheus\Contracts\Metric as MetricContract; |
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abstract class Metric implements MetricContract |
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{ |
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protected ?string $namespace = null; |
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protected string $name; |
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protected string $description; |
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protected array $labels = []; |
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protected static Storage $storage; |
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/** |
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* Metric constructor. |
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* |
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* @throws LabelException |
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*/ |
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public function __construct() |
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{ |
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foreach ($this->labels as $label) { |
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if (!preg_match('/^(?![_]{2})[a-zA-Z_][a-zA-Z0-9_]*$/', $label)) { |
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throw new LabelException("The label `{$label}` contains invalid characters."); |
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} |
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} |
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if (!preg_match('/^[a-zA-Z_:][a-zA-Z0-9_:]*$/', $this->key())) { |
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throw new PrometheusException("The metric name `{$this->key()}` contains invalid characters."); |
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} |
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} |
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/** |
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* @return string |
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*/ |
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public function key(): string |
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{ |
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if (!$this->namespace()) { |
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return $this->name(); |
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} |
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return "{$this->namespace()}_{$this->name()}"; |
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} |
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/** |
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* @return string |
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*/ |
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abstract public function type(): string; |
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/** |
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* @return string|null |
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*/ |
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public function namespace(): ?string |
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{ |
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return $this->namespace; |
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} |
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/** |
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* @return string |
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*/ |
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public function name(): string |
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{ |
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return $this->name; |
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} |
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/** |
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* @return string |
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*/ |
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public function description(): string |
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{ |
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return $this->description; |
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} |
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/** |
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* @return Collection |
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*/ |
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public function labels(): Collection |
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{ |
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return new Collection($this->labels); |
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} |
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/** |
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* @param Storage $storage |
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*/ |
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public static function storeUsing(Storage $storage): void |
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{ |
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static::$storage = $storage; |
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} |
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/** |
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* @return Storage |
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*/ |
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public static function storage(): Storage |
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{ |
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return static::$storage; |
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} |
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} |
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krenor /
prometheus-client
