128 lines
10 KiB
JavaScript
128 lines
10 KiB
JavaScript
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'use strict';
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Object.defineProperty(exports, "__esModule", { value: true });
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const metrics_1 = require("../services/metrics");
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const serviceManager_1 = require("../serviceManager");
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const Debug = require("debug");
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const histogram_1 = require("../utils/metrics/histogram");
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class EventLoopMetricOption {
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}
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exports.EventLoopMetricOption = EventLoopMetricOption;
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const defaultOptions = {
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eventLoopActive: true,
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eventLoopDelay: true
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};
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class EventLoopHandlesRequestsMetric {
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constructor() {
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this.logger = Debug('axm:features:metrics:eventloop');
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this.delayLoopInterval = 1000;
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}
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init(config) {
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if (config === false)
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return;
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if (config === undefined) {
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config = defaultOptions;
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}
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if (config === true) {
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config = defaultOptions;
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}
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this.metricService = serviceManager_1.ServiceManager.get('metrics');
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if (this.metricService === undefined)
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return this.logger('Failed to load metric service');
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this.logger('init');
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if (typeof process._getActiveRequests === 'function' && config.eventLoopActive === true) {
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const requestMetric = this.metricService.metric({
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name: 'Active requests',
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id: 'internal/libuv/requests',
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historic: true
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});
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this.requestTimer = setInterval(_ => {
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requestMetric.set(process._getActiveRequests().length);
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}, 1000);
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this.requestTimer.unref();
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}
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if (typeof process._getActiveHandles === 'function' && config.eventLoopActive === true) {
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const handleMetric = this.metricService.metric({
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name: 'Active handles',
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id: 'internal/libuv/handles',
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historic: true
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});
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this.handleTimer = setInterval(_ => {
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handleMetric.set(process._getActiveHandles().length);
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}, 1000);
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this.handleTimer.unref();
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}
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if (config.eventLoopDelay === false)
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return;
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const histogram = new histogram_1.default();
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const uvLatencyp50 = {
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name: 'Event Loop Latency',
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id: 'internal/libuv/latency/p50',
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type: metrics_1.MetricType.histogram,
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historic: true,
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implementation: histogram,
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handler: function () {
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const percentiles = this.implementation.percentiles([0.5]);
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if (percentiles[0.5] === null)
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return null;
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return percentiles[0.5].toFixed(2);
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},
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unit: 'ms'
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};
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const uvLatencyp95 = {
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name: 'Event Loop Latency p95',
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id: 'internal/libuv/latency/p95',
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type: metrics_1.MetricType.histogram,
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historic: true,
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implementation: histogram,
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handler: function () {
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const percentiles = this.implementation.percentiles([0.95]);
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if (percentiles[0.95] === null)
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return null;
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return percentiles[0.95].toFixed(2);
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},
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unit: 'ms'
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};
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this.metricService.registerMetric(uvLatencyp50);
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this.metricService.registerMetric(uvLatencyp95);
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this.runtimeStatsService = serviceManager_1.ServiceManager.get('runtimeStats');
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if (this.runtimeStatsService === undefined) {
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this.logger('runtimeStats module not found, fallbacking into pure js method');
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let oldTime = process.hrtime();
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this.delayTimer = setInterval(() => {
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const newTime = process.hrtime();
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const delay = (newTime[0] - oldTime[0]) * 1e3 + (newTime[1] - oldTime[1]) / 1e6 - this.delayLoopInterval;
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oldTime = newTime;
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histogram.update(delay);
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}, this.delayLoopInterval);
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this.delayTimer.unref();
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}
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else {
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this.logger('using runtimeStats module as data source for event loop latency');
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this.handle = (stats) => {
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if (typeof stats !== 'object' || !Array.isArray(stats.ticks))
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return;
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stats.ticks.forEach((tick) => {
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histogram.update(tick);
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});
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};
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this.runtimeStatsService.on('data', this.handle);
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}
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}
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destroy() {
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if (this.requestTimer !== undefined) {
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clearInterval(this.requestTimer);
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}
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if (this.handleTimer !== undefined) {
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clearInterval(this.handleTimer);
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}
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if (this.delayTimer !== undefined) {
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clearInterval(this.delayTimer);
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}
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if (this.runtimeStatsService !== undefined) {
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this.runtimeStatsService.removeListener('data', this.handle);
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}
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this.logger('destroy');
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}
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}
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exports.default = EventLoopHandlesRequestsMetric;
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