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<?php
declare(strict_types=1);
namespace OpenTelemetry\SDK\Metrics\Stream;
use OpenTelemetry\SDK\Metrics\Data\DataInterface;
use OpenTelemetry\SDK\Metrics\Data\Temporality;
/**
* @internal
*/
interface MetricStreamInterface
{
/**
* Returns the internal temporality of this stream.
*
* @return string|Temporality internal temporality
*/
public function temporality();
/**
* Returns the last metric timestamp.
*
* @return int metric timestamp
*/
public function timestamp(): int;
/**
* Pushes metric data to the stream.
*
* @param Metric $metric metric data to push
*/
public function push(Metric $metric): void;
/**
* Registers a new reader with the given temporality.
*
* @param string|Temporality $temporality temporality to use
* @return int reader id
*/
public function register($temporality): int;
/**
* Unregisters the given reader.
*
* @param int $reader reader id
*/
public function unregister(int $reader): void;
/**
* Collects metric data for the given reader.
*
* @param int $reader reader id
* @return DataInterface metric data
*/
public function collect(int $reader): DataInterface;
}
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