16ec1a3703
In T340552, the official PHP OpenTelemetry client was effectively rejected for inclusion in MediaWiki due to its size. Implement a minimal tracing library instead that eschews conformance with the OTEL client specification in favor of simplicity, while remaining capable of emitting trace data in OTLP format and thus retaining compatibility with any ingestion endpoint capable of handling OTLP. In its current state, the library supports a basic feature set that should be sufficient for basic tracing integration: * Span creation, inclusive span activation and automatic parent span assignment, * Span attributes and span kinds, * Basic resource (process/request)-level metadata generation, * Data export over OTLP. Additional functionality, such as trace propagation, can then be incrementally added to the library. Bug: T340552 Change-Id: Ibc3910058cd7ed064cad293a3cdc091344e66b86
43 lines
967 B
PHP
43 lines
967 B
PHP
<?php
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namespace Wikimedia\Telemetry;
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/**
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* Utility class for serializing data in OTLP JSON format.
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*
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* @since 1.43
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* @internal
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*/
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class OtlpSerializer {
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/**
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* Map of PHP types to their corresponding type name used in the OTLP JSON format.
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*/
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private const TYPE_MAP = [
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'string' => 'stringValue',
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'integer' => 'intValue',
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'boolean' => 'boolValue',
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'double' => 'doubleValue',
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'array' => 'arrayValue'
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];
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/**
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* Serialize an associative array into the format expected by the OTLP JSON format.
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* @param array $keyValuePairs The associative array to serialize
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* @return array
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*/
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public static function serializeKeyValuePairs( array $keyValuePairs ): array {
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$serialized = [];
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foreach ( $keyValuePairs as $key => $value ) {
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$type = gettype( $value );
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if ( isset( self::TYPE_MAP[$type] ) ) {
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$serialized[] = [
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'key' => $key,
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'value' => [ self::TYPE_MAP[$type] => $value ]
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];
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}
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}
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return $serialized;
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}
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}
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