79 lines
3.2 KiB
PHP
79 lines
3.2 KiB
PHP
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<?php
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declare(strict_types=1);
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namespace OpenTelemetry\SDK\Metrics;
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use InvalidArgumentException;
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use OpenTelemetry\API\Behavior\LogsMessagesTrait;
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use OpenTelemetry\SDK\Common\Configuration\Configuration;
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use OpenTelemetry\SDK\Common\Configuration\KnownValues;
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use OpenTelemetry\SDK\Common\Configuration\Variables;
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use OpenTelemetry\SDK\Metrics\Exemplar\ExemplarFilter\AllExemplarFilter;
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use OpenTelemetry\SDK\Metrics\Exemplar\ExemplarFilter\NoneExemplarFilter;
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use OpenTelemetry\SDK\Metrics\Exemplar\ExemplarFilter\WithSampledTraceExemplarFilter;
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use OpenTelemetry\SDK\Metrics\Exemplar\ExemplarFilterInterface;
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use OpenTelemetry\SDK\Metrics\MetricExporter\NoopMetricExporter;
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use OpenTelemetry\SDK\Metrics\MetricReader\ExportingReader;
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use OpenTelemetry\SDK\Registry;
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use OpenTelemetry\SDK\Resource\ResourceInfoFactory;
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use OpenTelemetry\SDK\Sdk;
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class MeterProviderFactory
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{
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use LogsMessagesTrait;
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/**
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* @todo https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/metrics/sdk_exporters/otlp.md#general
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* - "The exporter MUST configure the default aggregation on the basis of instrument kind using the
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* OTEL_EXPORTER_OTLP_METRICS_DEFAULT_HISTOGRAM_AGGREGATION variable as described below if it is implemented."
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*/
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public function create(): MeterProviderInterface
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{
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if (Sdk::isDisabled()) {
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return new NoopMeterProvider();
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}
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$exporters = Configuration::getList(Variables::OTEL_METRICS_EXPORTER);
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//TODO "The SDK MAY accept a comma-separated list to enable setting multiple exporters"
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if (count($exporters) !== 1) {
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throw new InvalidArgumentException(sprintf('Configuration %s requires exactly 1 exporter', Variables::OTEL_METRICS_EXPORTER));
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}
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$exporterName = $exporters[0];
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try {
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$factory = Registry::metricExporterFactory($exporterName);
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$exporter = $factory->create();
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} catch (\Throwable $t) {
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self::logWarning(sprintf('Unable to create %s meter provider: %s', $exporterName, $t->getMessage()));
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$exporter = new NoopMetricExporter();
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}
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// @todo "The exporter MUST be paired with a periodic exporting MetricReader"
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$reader = new ExportingReader($exporter);
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$resource = ResourceInfoFactory::defaultResource();
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$exemplarFilter = $this->createExemplarFilter(Configuration::getEnum(Variables::OTEL_METRICS_EXEMPLAR_FILTER));
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return MeterProvider::builder()
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->setResource($resource)
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->addReader($reader)
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->setExemplarFilter($exemplarFilter)
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->build();
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}
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private function createExemplarFilter(string $name): ExemplarFilterInterface
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{
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switch ($name) {
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case KnownValues::VALUE_WITH_SAMPLED_TRACE:
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return new WithSampledTraceExemplarFilter();
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case KnownValues::VALUE_ALL:
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return new AllExemplarFilter();
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case KnownValues::VALUE_NONE:
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return new NoneExemplarFilter();
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default:
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self::logWarning('Unknown exemplar filter: ' . $name);
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return new NoneExemplarFilter();
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}
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}
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}
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