50 lines
1.2 KiB
PHP
50 lines
1.2 KiB
PHP
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<?php
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declare(strict_types=1);
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namespace OpenTelemetry\SDK\Trace;
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use OpenTelemetry\API\Trace\SpanContextValidator;
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use Throwable;
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class RandomIdGenerator implements IdGeneratorInterface
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{
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private const TRACE_ID_HEX_LENGTH = 32;
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private const SPAN_ID_HEX_LENGTH = 16;
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public function generateTraceId(): string
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{
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do {
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$traceId = $this->randomHex(self::TRACE_ID_HEX_LENGTH);
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} while (!SpanContextValidator::isValidTraceId($traceId));
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return $traceId;
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}
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public function generateSpanId(): string
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{
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do {
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$spanId = $this->randomHex(self::SPAN_ID_HEX_LENGTH);
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} while (!SpanContextValidator::isValidSpanId($spanId));
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return $spanId;
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}
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/**
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* @psalm-suppress ArgumentTypeCoercion $hexLength is always a positive integer
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*/
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private function randomHex(int $hexLength): string
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{
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try {
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return bin2hex(random_bytes(intdiv($hexLength, 2)));
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} catch (Throwable $e) {
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return $this->fallbackAlgorithm($hexLength);
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}
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}
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private function fallbackAlgorithm(int $hexLength): string
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{
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return substr(str_shuffle(str_repeat('0123456789abcdef', $hexLength)), 1, $hexLength);
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}
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}
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