78 lines
1.7 KiB
PHP
78 lines
1.7 KiB
PHP
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<?php
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declare(strict_types=1);
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namespace OpenTelemetry\SDK\Metrics\View;
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use OpenTelemetry\SDK\Metrics\AggregationInterface;
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use OpenTelemetry\SDK\Metrics\Instrument;
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use OpenTelemetry\SDK\Metrics\ViewProjection;
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final class ViewTemplate
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{
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private ?string $name = null;
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private ?string $description = null;
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/**
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* @var list<string>
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*/
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private ?array $attributeKeys = null;
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private ?AggregationInterface $aggregation = null;
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private function __construct()
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{
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}
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public static function create(): self
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{
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static $instance;
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return $instance ??= new self();
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}
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public function withName(string $name): self
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{
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$self = clone $this;
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$self->name = $name;
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return $self;
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}
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public function withDescription(string $description): self
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{
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$self = clone $this;
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$self->description = $description;
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return $self;
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}
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/**
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* @param list<string> $attributeKeys
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*/
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public function withAttributeKeys(array $attributeKeys): self
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{
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$self = clone $this;
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$self->attributeKeys = $attributeKeys;
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return $self;
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}
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public function withAggregation(?AggregationInterface $aggregation): self
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{
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$self = clone $this;
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$self->aggregation = $aggregation;
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return $self;
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}
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public function project(Instrument $instrument): ViewProjection
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{
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return new ViewProjection(
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$this->name ?? $instrument->name,
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$instrument->unit,
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$this->description ?? $instrument->description,
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$this->attributeKeys,
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$this->aggregation,
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);
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}
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}
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