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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 * as defaultLogger from '../common/console-logger';
import { StatsEventListener } from '../exporters/types';
import { Metric } from '../metrics/export/types';
import { TagMap } from '../tags/tag-map';
import { TagKey } from '../tags/types';
import { AggregationType, Measure, Measurement, MeasureUnit, Stats, View } from './types';
export declare class BaseStats implements Stats {
/** A list of Stats exporters */
private statsEventListeners;
/** A map of Measures (name) to their corresponding Views */
private registeredViews;
/** An object to log information to */
private logger;
/** Singleton instance */
private static singletonInstance;
/**
* Creates stats
* @param logger
*/
constructor(logger?: typeof defaultLogger);
/** Gets the stats instance. */
static readonly instance: Stats;
/**
* Registers a view to listen to new measurements in its measure.
* @param view The view to be registered
*/
registerView(view: View): void;
/**
* Creates a view.
* @param name The view name
* @param measure The view measure
* @param aggregation The view aggregation type
* @param tagKeys The view columns (tag keys)
* @param description The view description
* @param bucketBoundaries The view bucket boundaries for a distribution
* aggregation type
*/
createView(name: string, measure: Measure, aggregation: AggregationType, tagKeys: TagKey[], description: string, bucketBoundaries?: number[]): View;
/**
* Registers an exporter to send stats data to a service.
* @param exporter An stats exporter
*/
registerExporter(exporter: StatsEventListener): void;
/**
* Creates a measure of type Double.
* @param name The measure name
* @param unit The measure unit
* @param description The measure description
*/
createMeasureDouble(name: string, unit: MeasureUnit, description?: string): Measure;
/**
* Creates a measure of type Int64. Values must be integers up to
* Number.MAX_SAFE_INTERGER.
* @param name The measure name
* @param unit The measure unit
* @param description The measure description
*/
createMeasureInt64(name: string, unit: MeasureUnit, description?: string): Measure;
/**
* Verifies whether all measurements has positive value
* @param measurements A list of measurements
* @returns {boolean} Whether values is positive
*/
private hasNegativeValue;
/**
* Gets a collection of produced Metric`s to be exported.
* @returns {Metric[]} List of metrics
*/
getMetrics(): Metric[];
/**
* Updates all views with the new measurements.
* @param measurements A list of measurements to record
* @param tags optional The tags to which the value is applied.
* tags could either be explicitly passed to the method, or implicitly
* read from current execution context.
*/
record(measurements: Measurement[], tags?: TagMap): void;
/**
* Remove all registered Views and exporters from the stats.
*/
clear(): void;
}