217 lines
7.1 KiB
PHP
217 lines
7.1 KiB
PHP
<?php
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use OpenTelemetry\API\Trace\Propagation\TraceContextPropagator;
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use OpenTelemetry\API\Trace\SpanContextInterface;
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use OpenTelemetry\API\Trace\SpanInterface;
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use OpenTelemetry\API\Trace\SpanKind;
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use OpenTelemetry\API\Trace\TraceFlags;
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use OpenTelemetry\API\Trace\TraceStateInterface;
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use OpenTelemetry\Context\ContextInterface;
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use OpenTelemetry\Context\ContextKey;
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use OpenTelemetry\Context\ContextKeyInterface;
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use OpenTelemetry\Context\ImplicitContextKeyedInterface;
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use OpenTelemetry\Context\ScopeInterface;
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use OpenTelemetry\Contrib\Otlp\OtlpHttpTransportFactory;
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use OpenTelemetry\Contrib\Otlp\SpanExporter;
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use OpenTelemetry\SDK\Common\Attribute\Attributes;
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use OpenTelemetry\SDK\Resource\ResourceInfo;
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use OpenTelemetry\SDK\Resource\ResourceInfoFactory;
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use OpenTelemetry\SDK\Trace\Sampler\AlwaysOnSampler;
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use OpenTelemetry\SDK\Trace\Sampler\ParentBased;
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use OpenTelemetry\SDK\Trace\SpanProcessor\SimpleSpanProcessor;
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use OpenTelemetry\SDK\Trace\TracerProvider;
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use OpenTelemetry\SemConv\ResourceAttributes;
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class DummyContextInterface implements ContextInterface {
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/** @var DummyContextInterface */
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private static $instance;
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public function __construct() {
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self::$instance = $this;
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}
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/** @phpstan-ignore-next-line */
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public static function createKey(string $key): ContextKeyInterface { return new ContextKey(); }
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public static function getCurrent(): ContextInterface { return self::$instance; }
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public function activate(): ScopeInterface { return new DummyScopeInterface(); }
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public function with(ContextKeyInterface $key, $value): ContextInterface { return $this; }
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public function withContextValue(ImplicitContextKeyedInterface $value): ContextInterface { return $this; }
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public function get(ContextKeyInterface $key) { return new ContextKey(); }
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}
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class DummySpanContextInterface implements SpanContextInterface {
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/** @var DummySpanContextInterface $instance */
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private static $instance;
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public function __construct() {
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self::$instance = $this;
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}
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public static function createFromRemoteParent(string $traceId, string $spanId, int $traceFlags = TraceFlags::DEFAULT, ?TraceStateInterface $traceState = null): SpanContextInterface { return self::$instance; }
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public static function getInvalid(): SpanContextInterface { return self::$instance; }
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public static function create(string $traceId, string $spanId, int $traceFlags = TraceFlags::DEFAULT, ?TraceStateInterface $traceState = null): SpanContextInterface { return self::$instance; }
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public function getTraceId(): string { return ""; }
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public function getTraceIdBinary(): string { return ""; }
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public function getSpanId(): string { return ""; }
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public function getSpanIdBinary(): string { return ""; }
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public function getTraceFlags(): int { return 0; }
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public function getTraceState(): ?TraceStateInterface { return null; }
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public function isValid(): bool { return false; }
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public function isRemote(): bool { return false; }
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public function isSampled(): bool { return false; }
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}
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class DummyScopeInterface implements ScopeInterface {
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public function detach(): int { return 0; }
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}
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class DummySpanInterface implements SpanInterface {
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/** @var DummySpanInterface $instance */
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private static $instance;
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public function __construct() {
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self::$instance = $this;
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}
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public static function fromContext(ContextInterface $context): SpanInterface { return self::$instance; }
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public static function getCurrent(): SpanInterface { return self::$instance; }
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public static function getInvalid(): SpanInterface { return self::$instance; }
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public static function wrap(SpanContextInterface $spanContext): SpanInterface { return self::$instance; }
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public function getContext(): SpanContextInterface { return new DummySpanContextInterface(); }
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public function isRecording(): bool { return false; }
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/** @phpstan-ignore-next-line */
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public function setAttribute(string $key, $value): SpanInterface { return self::$instance; }
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/** @phpstan-ignore-next-line */
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public function setAttributes(iterable $attributes): SpanInterface { return self::$instance; }
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/** @phpstan-ignore-next-line */
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public function addEvent(string $name, iterable $attributes = [], ?int $timestamp = null): SpanInterface { return $this; }
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/** @phpstan-ignore-next-line */
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public function recordException(Throwable $exception, iterable $attributes = []): SpanInterface { return $this; }
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public function updateName(string $name): SpanInterface { return $this; }
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public function setStatus(string $code, ?string $description = null): SpanInterface { return $this; }
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public function end(?int $endEpochNanos = null): void { }
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public function activate(): ScopeInterface { return new DummyScopeInterface(); }
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public function storeInContext(ContextInterface $context): ContextInterface { return new DummyContextInterface(); }
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}
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class Tracer {
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/** @var Tracer $instance */
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private static $instance = null;
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/** @var OpenTelemetry\SDK\Trace\TracerProviderInterface $tracerProvider */
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private $tracerProvider = null;
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/** @var OpenTelemetry\API\Trace\TracerInterface $tracer */
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private $tracer = null;
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public function __construct() {
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$OPENTELEMETRY_ENDPOINT = Config::get(Config::OPENTELEMETRY_ENDPOINT);
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if ($OPENTELEMETRY_ENDPOINT) {
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$transport = (new OtlpHttpTransportFactory())->create($OPENTELEMETRY_ENDPOINT, 'application/x-protobuf');
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$exporter = new SpanExporter($transport);
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$resource = ResourceInfoFactory::emptyResource()->merge(
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ResourceInfo::create(Attributes::create(
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[ResourceAttributes::SERVICE_NAME => Config::get(Config::OPENTELEMETRY_SERVICE)]
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), ResourceAttributes::SCHEMA_URL),
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);
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$this->tracerProvider = TracerProvider::builder()
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->addSpanProcessor(new SimpleSpanProcessor($exporter))
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->setResource($resource)
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->setSampler(new ParentBased(new AlwaysOnSampler()))
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->build();
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$this->tracer = $this->tracerProvider->getTracer('io.opentelemetry.contrib.php');
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$context = TraceContextPropagator::getInstance()->extract(getallheaders());
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$span = $this->tracer->spanBuilder($_SESSION['name'] ?? 'not logged in')
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->setParent($context)
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->setSpanKind(SpanKind::KIND_SERVER)
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->setAttribute('php.request', json_encode($_REQUEST))
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->setAttribute('php.server', json_encode($_SERVER))
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->setAttribute('php.session', json_encode($_SESSION ?? []))
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->startSpan();
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$scope = $span->activate();
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register_shutdown_function(function() use ($span, $scope) {
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$span->end();
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$scope->detach();
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$this->tracerProvider->shutdown();
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});
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}
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}
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/**
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* @param string $name
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* @return OpenTelemetry\API\Trace\SpanInterface
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*/
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private function _start(string $name) {
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if ($this->tracer != null) {
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$span = $this->tracer
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->spanBuilder($name)
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->setSpanKind(SpanKind::KIND_SERVER)
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->startSpan();
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$span->activate();
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} else {
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$span = new DummySpanInterface();
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}
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return $span;
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}
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/**
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* @param string $name
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* @return OpenTelemetry\API\Trace\SpanInterface
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*/
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public static function start(string $name) {
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return self::get_instance()->_start($name);
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}
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public static function get_instance() : Tracer {
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if (self::$instance == null)
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self::$instance = new self();
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return self::$instance;
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}
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}
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