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<?php
declare(strict_types=1);
namespace OpenTelemetry\SDK\Trace;
use OpenTelemetry\Context\ContextInterface;
use OpenTelemetry\SDK\Common\Future\CancellationInterface;
/** @see https://github.com/open-telemetry/opentelemetry-specification/blob/v1.6.1/specification/trace/sdk.md#span-processor */
interface SpanProcessorInterface
{
/**
* @see https://github.com/open-telemetry/opentelemetry-specification/blob/v1.7.0/specification/trace/sdk.md#onstart
*/
public function onStart(ReadWriteSpanInterface $span, ContextInterface $parentContext): void;
/**
* @see https://github.com/open-telemetry/opentelemetry-specification/blob/v1.7.0/specification/trace/sdk.md#onendspan
*/
public function onEnd(ReadableSpanInterface $span): void;
/**
* Export all ended spans to the configured Exporter that have not yet been exported.
* Returns `true` if the flush was successful, otherwise `false`.
*
* @see https://github.com/open-telemetry/opentelemetry-specification/blob/v1.7.0/specification/trace/sdk.md#forceflush-1
*/
public function forceFlush(?CancellationInterface $cancellation = null): bool;
/**
* Cleanup; after shutdown, calling onStart, onEnd, or forceFlush is invalid
* Returns `false` is the processor is already shutdown, otherwise `true`.
*
* @see https://github.com/open-telemetry/opentelemetry-specification/blob/v1.7.0/specification/trace/sdk.md#shutdown-1
*/
public function shutdown(?CancellationInterface $cancellation = null): bool;
}
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