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<?php
# Generated by the protocol buffer compiler. DO NOT EDIT!
# source: opentelemetry/proto/metrics/v1/metrics.proto
namespace Opentelemetry\Proto\Metrics\V1;
use UnexpectedValueException;
/**
* AggregationTemporality defines how a metric aggregator reports aggregated
* values. It describes how those values relate to the time interval over
* which they are aggregated.
*
* Protobuf type <code>opentelemetry.proto.metrics.v1.AggregationTemporality</code>
*/
class AggregationTemporality
{
/**
* UNSPECIFIED is the default AggregationTemporality, it MUST not be used.
*
* Generated from protobuf enum <code>AGGREGATION_TEMPORALITY_UNSPECIFIED = 0;</code>
*/
const AGGREGATION_TEMPORALITY_UNSPECIFIED = 0;
/**
* DELTA is an AggregationTemporality for a metric aggregator which reports
* changes since last report time. Successive metrics contain aggregation of
* values from continuous and non-overlapping intervals.
* The values for a DELTA metric are based only on the time interval
* associated with one measurement cycle. There is no dependency on
* previous measurements like is the case for CUMULATIVE metrics.
* For example, consider a system measuring the number of requests that
* it receives and reports the sum of these requests every second as a
* DELTA metric:
* 1. The system starts receiving at time=t_0.
* 2. A request is received, the system measures 1 request.
* 3. A request is received, the system measures 1 request.
* 4. A request is received, the system measures 1 request.
* 5. The 1 second collection cycle ends. A metric is exported for the
* number of requests received over the interval of time t_0 to
* t_0+1 with a value of 3.
* 6. A request is received, the system measures 1 request.
* 7. A request is received, the system measures 1 request.
* 8. The 1 second collection cycle ends. A metric is exported for the
* number of requests received over the interval of time t_0+1 to
* t_0+2 with a value of 2.
*
* Generated from protobuf enum <code>AGGREGATION_TEMPORALITY_DELTA = 1;</code>
*/
const AGGREGATION_TEMPORALITY_DELTA = 1;
/**
* CUMULATIVE is an AggregationTemporality for a metric aggregator which
* reports changes since a fixed start time. This means that current values
* of a CUMULATIVE metric depend on all previous measurements since the
* start time. Because of this, the sender is required to retain this state
* in some form. If this state is lost or invalidated, the CUMULATIVE metric
* values MUST be reset and a new fixed start time following the last
* reported measurement time sent MUST be used.
* For example, consider a system measuring the number of requests that
* it receives and reports the sum of these requests every second as a
* CUMULATIVE metric:
* 1. The system starts receiving at time=t_0.
* 2. A request is received, the system measures 1 request.
* 3. A request is received, the system measures 1 request.
* 4. A request is received, the system measures 1 request.
* 5. The 1 second collection cycle ends. A metric is exported for the
* number of requests received over the interval of time t_0 to
* t_0+1 with a value of 3.
* 6. A request is received, the system measures 1 request.
* 7. A request is received, the system measures 1 request.
* 8. The 1 second collection cycle ends. A metric is exported for the
* number of requests received over the interval of time t_0 to
* t_0+2 with a value of 5.
* 9. The system experiences a fault and loses state.
* 10. The system recovers and resumes receiving at time=t_1.
* 11. A request is received, the system measures 1 request.
* 12. The 1 second collection cycle ends. A metric is exported for the
* number of requests received over the interval of time t_1 to
* t_0+1 with a value of 1.
* Note: Even though, when reporting changes since last report time, using
* CUMULATIVE is valid, it is not recommended. This may cause problems for
* systems that do not use start_time to determine when the aggregation
* value was reset (e.g. Prometheus).
*
* Generated from protobuf enum <code>AGGREGATION_TEMPORALITY_CUMULATIVE = 2;</code>
*/
const AGGREGATION_TEMPORALITY_CUMULATIVE = 2;
private static $valueToName = [
self::AGGREGATION_TEMPORALITY_UNSPECIFIED => 'AGGREGATION_TEMPORALITY_UNSPECIFIED',
self::AGGREGATION_TEMPORALITY_DELTA => 'AGGREGATION_TEMPORALITY_DELTA',
self::AGGREGATION_TEMPORALITY_CUMULATIVE => 'AGGREGATION_TEMPORALITY_CUMULATIVE',
];
public static function name($value)
{
if (!isset(self::$valueToName[$value])) {
throw new UnexpectedValueException(sprintf(
'Enum %s has no name defined for value %s', __CLASS__, $value));
}
return self::$valueToName[$value];
}
public static function value($name)
{
$const = __CLASS__ . '::' . strtoupper($name);
if (!defined($const)) {
throw new UnexpectedValueException(sprintf(
'Enum %s has no value defined for name %s', __CLASS__, $name));
}
return constant($const);
}
}
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