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<?php namespace Wikimedia\Telemetry; /** * Represents an OpenTelemetry span, i.e. a single operation within a trace. * * @since 1.43 * @see https://opentelemetry.io/docs/specs/otel/trace/api/#span */ interface SpanInterface { /** * Default value. Indicates that the span represents an internal operation within an application, * as opposed to an operations with remote parents or children. */ public const SPAN_KIND_INTERNAL = 1; /** * Indicates that the span covers server-side handling of a synchronous RPC or other remote request. */ public const SPAN_KIND_SERVER = 2; /** * Indicates that the span describes a request to some remote service. */ public const SPAN_KIND_CLIENT = 3; /** * Indicates that the span describes the initiators of an asynchronous request. */ public const SPAN_KIND_PRODUCER = 4; /** * Indicates that the span describes a child of an asynchronous * {@link SpanInterface::SPAN_KIND_PRODUCER} request. */ public const SPAN_KIND_CONSUMER = 5; /** * Get the context holding data for this span. * @return SpanContext */ public function getContext(): SpanContext; /** * Set attributes (arbitrary metadata) for this span. * * When deciding on the set of attributes to register as well as their naming, consider following * <a href="https://opentelemetry.io/docs/specs/semconv/general/trace/">Semantic Conventions</a> where * applicable. * * @param array $attributes key-value mapping of attribute names to values * @return SpanInterface fluent interface */ public function setAttributes( array $attributes ): SpanInterface; /** * Set the kind of this span, which describes how it relates to its parent and children * within the overarching trace. * * @param int $spanKind One of the SpanInterface::SPAN_KIND_** constants * @see https://opentelemetry.io/docs/specs/otel/trace/api/#spankind * @return SpanInterface fluent interface */ public function setSpanKind( int $spanKind ): SpanInterface; /** * Start this span, optionally specifying an override for its start time. * @param int|null $epochNanos The start time to use, or `null` to use the current time. * @return SpanInterface */ public function start( ?int $epochNanos = null ): SpanInterface; /** * End this span, optionally specifying an override for its end time. * @param int|null $epochNanos The end time to use, or `null` to use the current time. * @return void */ public function end( ?int $epochNanos = null ): void; /** * Make this span the active span. * * This will cause any spans started without specifying an explicit parent to automatically * become children of this span as long as it remains active. * * @return void */ public function activate(): void; /** * Deactivate this span. * @return void */ public function deactivate(): void; }
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