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/**
* Copyright 2018, OpenCensus Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import { LabelKey, LabelValue, Metric, MetricDescriptorType, TimeSeries, Timestamp } from '../export/types';
import * as types from '../gauges/types';
/**
* Gauge metric
*/
export declare class Gauge implements types.Meter {
readonly labelKeys: LabelKey[];
private readonly metricDescriptor;
private labelKeysLength;
private defaultLabelValues;
private registeredPoints;
private static readonly LABEL_VALUE;
private static readonly LABEL_VALUES;
private static readonly ERROR_MESSAGE_INVALID_SIZE;
/**
* Constructs a new Gauge instance.
*
* @param {string} name The name of the metric.
* @param {string} description The description of the metric.
* @param {string} unit The unit of the metric.
* @param {MetricDescriptorType} type The type of metric.
* @param {LabelKey[]} labelKeys The list of the label keys.
*/
constructor(name: string, description: string, unit: string, type: MetricDescriptorType, labelKeys: LabelKey[]);
/**
* Creates a TimeSeries and returns a Point if the specified
* labelValues is not already associated with this gauge, else returns an
* existing Point.
*
* It is recommended to keep a reference to the Point instead of always
* calling this method for manual operations.
*
* @param {LabelValue[]} labelValues The list of the label values.
* @returns {types.Point} The value of single gauge.
*/
getOrCreateTimeSeries(labelValues: LabelValue[]): types.Point;
/**
* Returns a Point for a gauge with all labels not set, or default
* labels.
*
* @returns {types.Point} The value of single gauge.
*/
getDefaultTimeSeries(): types.Point;
/**
* Removes the TimeSeries from the gauge metric, if it is present. i.e.
* references to previous Point objects are invalid (not part of the
* metric).
*
* @param {LabelValue[]} labelValues The list of label values.
*/
removeTimeSeries(labelValues: LabelValue[]): void;
/**
* Removes all TimeSeries from the gauge metric. i.e. references to all
* previous Point objects are invalid (not part of the metric).
*/
clear(): void;
/**
* Registers a TimeSeries and returns a Point if the specified
* labelValues is not already associated with this gauge, else returns an
* existing Point.
*
* @param {LabelValue[]} labelValues The list of the label values.
* @returns {types.Point} The value of single gauge.
*/
private registerTimeSeries;
/**
* Provides a Metric with one or more TimeSeries.
*
* @returns {Metric} The Metric.
*/
getMetric(): Metric;
}
/**
* The value of a single point in the Gauge.TimeSeries.
*/
export declare class PointEntry implements types.Point {
private readonly labelValues;
private value;
constructor(labelValues: LabelValue[]);
/**
* Adds the given value to the current value. The values can be negative.
*
* @param {number} amt The value to add.
*/
add(amt: number): void;
/**
* Sets the given value.
*
* @param {number} val The new value.
*/
set(val: number): void;
/**
* Returns the TimeSeries with one or more Point.
*
* @param {Timestamp} timestamp The time at which the gauge is recorded.
* @returns {TimeSeries} The TimeSeries.
*/
getTimeSeries(timestamp: Timestamp): TimeSeries;
}