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<?php |
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/** |
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* Context generator for carrier |
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* User: moyo |
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* Date: 23/11/2017 |
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* Time: 4:47 PM |
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*/ |
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namespace Carno\Tracing\Chips; |
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use Carno\Tracing\Contracts\Vars\CTX; |
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use Carno\Tracing\Standard\Context; |
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use OpenTracing\Exceptions\SpanContextNotFound; |
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use OpenTracing\SpanContext; |
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trait ContextOperator |
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{ |
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use IDGenerator; |
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/** |
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* @param SpanContext|null $in |
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* @return SpanContext |
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*/ |
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public function fusedContext(SpanContext $in = null) : SpanContext |
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{ |
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return $in ? $this->initFromContext($in) : $this->toNewContext(); |
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} |
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/** |
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* @return SpanContext |
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*/ |
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protected function toNewContext() : SpanContext |
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{ |
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if (empty($traceID = $this->getTraceID())) { |
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throw SpanContextNotFound::create(); |
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} |
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$overrides = [ |
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CTX::TRACE_ID => $traceID, |
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CTX::SPAN_ID => $this->newSpanID(), |
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CTX::PARENT_SPAN_ID => $this->getSpanID(), |
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CTX::TRACE_SAMPLED => $this->checkIsSampled(), |
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]; |
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return new Context(array_merge($this->getBaggageItems(), $overrides)); |
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} |
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/** |
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* @param SpanContext $ctx |
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* @return SpanContext |
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*/ |
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protected function initFromContext(SpanContext $ctx) : SpanContext |
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{ |
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$this->setTraceID($ctx[CTX::TRACE_ID] ?? ''); |
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$this->setSpanID($ctx[CTX::SPAN_ID] ?? ''); |
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if ($ctx[CTX::PARENT_SPAN_ID] ?? '') { |
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$this->setParentSpanID($ctx[CTX::PARENT_SPAN_ID]); |
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} |
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$this->markIsSampled($ctx[CTX::TRACE_SAMPLED] ?? false); |
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$items = []; |
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foreach ($ctx->getIterator() as $k => $v) { |
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if (in_array($k, [CTX::TRACE_ID, CTX::SPAN_ID, CTX::PARENT_SPAN_ID, CTX::TRACE_SAMPLED])) { |
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continue; |
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} else { |
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$items[$k] = $v; |
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} |
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} |
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$items && $this->setBaggageItems($items); |
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return $ctx; |
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} |
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} |
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carno-php /
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