Current File : //usr/lib/node_modules/pm2/node_modules/@opencensus/core/build/src/stats/metric-utils.js
"use strict";
/**
* 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.
*/
Object.defineProperty(exports, "__esModule", { value: true });
const types_1 = require("../metrics/export/types");
const types_2 = require("./types");
/** Utils to convert Stats data models to Metric data models */
class MetricUtils {
/**
* Gets the corresponding metric type for the given stats type.
* @param measure The measure for which to find a metric type
* @param aggregation The aggregation for which to find a metric type
* @returns {MetricDescriptorType} Type of metric descriptor
*/
static getType(measure, aggregation) {
if (aggregation === types_2.AggregationType.SUM) {
switch (measure.type) {
case types_2.MeasureType.INT64:
return types_1.MetricDescriptorType.CUMULATIVE_INT64;
case types_2.MeasureType.DOUBLE:
return types_1.MetricDescriptorType.CUMULATIVE_DOUBLE;
default:
throw new Error(`Unknown measure type ${measure.type}`);
}
}
else if (aggregation === types_2.AggregationType.COUNT) {
return types_1.MetricDescriptorType.CUMULATIVE_INT64;
}
else if (aggregation === types_2.AggregationType.DISTRIBUTION) {
return types_1.MetricDescriptorType.CUMULATIVE_DISTRIBUTION;
}
else if (aggregation === types_2.AggregationType.LAST_VALUE) {
switch (measure.type) {
case types_2.MeasureType.INT64:
return types_1.MetricDescriptorType.GAUGE_INT64;
case types_2.MeasureType.DOUBLE:
return types_1.MetricDescriptorType.GAUGE_DOUBLE;
default:
throw new Error(`Unknown measure type ${measure.type}`);
}
}
throw new Error(`Unknown aggregation type ${aggregation}`);
}
/**
* Gets a MetricDescriptor for given view.
* @param view The view for which to build a metric descriptor
* @returns {MetricDescriptor}
*/
static viewToMetricDescriptor(view) {
return {
name: view.name,
description: view.description,
unit: view.measure.unit,
type: MetricUtils.getType(view.measure, view.aggregation),
labelKeys: view.getColumns().map(
// TODO(mayurkale): add description
tagKey => ({ key: tagKey.name, description: '' }))
};
}
/**
* Converts tag values to label values.
* @param tagValues
* @returns {LabelValue[]} List of label values
*/
static tagValuesToLabelValues(tagValues) {
return tagValues.map((tagValue) => ({ value: tagValue ? tagValue.value : null }));
}
}
exports.MetricUtils = MetricUtils;
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