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<?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 ?TransportFactoryInterface $transportFactory;
private const DEFAULT_COMPRESSION = 'none';
public function __construct(?TransportFactoryInterface $transportFactory = null)
{
$this->transportFactory = $transportFactory;
}
/**
* @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 = $this->getHeaders();
$compression = $this->getCompression();
$factoryClass = Registry::transportFactory($protocol);
$factory = $this->transportFactory ?: new $factoryClass();
return $factory->create($endpoint, $contentType, $headers, $compression);
}
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 getHeaders(): array
{
$headers = Configuration::has(Variables::OTEL_EXPORTER_OTLP_TRACES_HEADERS) ?
Configuration::getMap(Variables::OTEL_EXPORTER_OTLP_TRACES_HEADERS) :
Configuration::getMap(Variables::OTEL_EXPORTER_OTLP_HEADERS);
return $headers + OtlpUtil::getUserAgentHeader();
}
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);
}
}
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