SpanExporterFactory.php

<?php

declare (strict_types=1);
namespace OpenTelemetry\Contrib\Otlp;

use OpenTelemetry\API\Behavior\LogsMessagesTrait;
use OpenTelemetry\API\Signals;
use OpenTelemetry\SDK\Common\Configuration\Configuration;
use OpenTelemetry\SDK\Common\Configuration\Defaults;
use OpenTelemetry\SDK\Common\Configuration\Variables;
use OpenTelemetry\SDK\Common\Export\TransportFactoryInterface;
use OpenTelemetry\SDK\Common\Export\TransportInterface;
use OpenTelemetry\SDK\Registry;
use OpenTelemetry\SDK\Trace\SpanExporter\SpanExporterFactoryInterface;
use OpenTelemetry\SDK\Trace\SpanExporterInterface;
class SpanExporterFactory implements SpanExporterFactoryInterface {
    use LogsMessagesTrait;
    private const DEFAULT_COMPRESSION = 'none';
    public function __construct(?TransportFactoryInterface $transportFactory = null) {
    }
    
    /**
     * @psalm-suppress ArgumentTypeCoercion
     */
    public function create() : SpanExporterInterface {
        $transport = $this->buildTransport();
        return new SpanExporter($transport);
    }
    
    /**
     * @psalm-suppress ArgumentTypeCoercion
     * @psalm-suppress UndefinedClass
     */
    private function buildTransport() : TransportInterface {
        $protocol = $this->getProtocol();
        $contentType = Protocols::contentType($protocol);
        $endpoint = $this->getEndpoint($protocol);
        $headers = OtlpUtil::getHeaders(Signals::TRACE);
        $compression = $this->getCompression();
        $timeout = $this->getTimeout();
        $factoryClass = Registry::transportFactory($protocol);
        $factory = $this->transportFactory ?: new $factoryClass();
        return $factory->create($endpoint, $contentType, $headers, $compression, $timeout);
    }
    private function getProtocol() : string {
        return Configuration::has(Variables::OTEL_EXPORTER_OTLP_TRACES_PROTOCOL) ? Configuration::getEnum(Variables::OTEL_EXPORTER_OTLP_TRACES_PROTOCOL) : Configuration::getEnum(Variables::OTEL_EXPORTER_OTLP_PROTOCOL);
    }
    private function getEndpoint(string $protocol) : string {
        if (Configuration::has(Variables::OTEL_EXPORTER_OTLP_TRACES_ENDPOINT)) {
            return Configuration::getString(Variables::OTEL_EXPORTER_OTLP_TRACES_ENDPOINT);
        }
        $endpoint = Configuration::has(Variables::OTEL_EXPORTER_OTLP_ENDPOINT) ? Configuration::getString(Variables::OTEL_EXPORTER_OTLP_ENDPOINT) : Defaults::OTEL_EXPORTER_OTLP_ENDPOINT;
        if ($protocol === Protocols::GRPC) {
            return $endpoint . OtlpUtil::method(Signals::TRACE);
        }
        return HttpEndpointResolver::create()->resolveToString($endpoint, Signals::TRACE);
    }
    private function getCompression() : string {
        return Configuration::has(Variables::OTEL_EXPORTER_OTLP_TRACES_COMPRESSION) ? Configuration::getEnum(Variables::OTEL_EXPORTER_OTLP_TRACES_COMPRESSION) : Configuration::getEnum(Variables::OTEL_EXPORTER_OTLP_COMPRESSION, self::DEFAULT_COMPRESSION);
    }
    private function getTimeout() : float {
        $value = Configuration::has(Variables::OTEL_EXPORTER_OTLP_TRACES_TIMEOUT) ? Configuration::getInt(Variables::OTEL_EXPORTER_OTLP_TRACES_TIMEOUT) : Configuration::getInt(Variables::OTEL_EXPORTER_OTLP_TIMEOUT);
        return $value / 1000;
    }

}