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[Logs Overview] Overview component (iteration 1) (attempt 2) (#195673)
This is a re-submission of #191899, which was reverted due to a storybook build problem. This introduces a "Logs Overview" component for use in solution UIs behind a feature flag. --------- Co-authored-by: kibanamachine <42973632+kibanamachine@users.noreply.github.com> Co-authored-by: Kerry Gallagher <471693+Kerry350@users.noreply.github.com> Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>
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74 changes: 74 additions & 0 deletions
74
packages/kbn-apm-synthtrace-client/src/lib/gaussian_events.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,74 @@ | ||
| /* | ||
| * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one | ||
| * or more contributor license agreements. Licensed under the "Elastic License | ||
| * 2.0", the "GNU Affero General Public License v3.0 only", and the "Server Side | ||
| * Public License v 1"; you may not use this file except in compliance with, at | ||
| * your election, the "Elastic License 2.0", the "GNU Affero General Public | ||
| * License v3.0 only", or the "Server Side Public License, v 1". | ||
| */ | ||
|
|
||
| import { castArray } from 'lodash'; | ||
| import { SynthtraceGenerator } from '../types'; | ||
| import { Fields } from './entity'; | ||
| import { Serializable } from './serializable'; | ||
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| export class GaussianEvents<TFields extends Fields = Fields> { | ||
| constructor( | ||
| private readonly from: Date, | ||
| private readonly to: Date, | ||
| private readonly mean: Date, | ||
| private readonly width: number, | ||
| private readonly totalPoints: number | ||
| ) {} | ||
|
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| *generator<TGeneratedFields extends Fields = TFields>( | ||
| map: ( | ||
| timestamp: number, | ||
| index: number | ||
| ) => Serializable<TGeneratedFields> | Array<Serializable<TGeneratedFields>> | ||
| ): SynthtraceGenerator<TGeneratedFields> { | ||
| if (this.totalPoints <= 0) { | ||
| return; | ||
| } | ||
|
|
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| const startTime = this.from.getTime(); | ||
| const endTime = this.to.getTime(); | ||
| const meanTime = this.mean.getTime(); | ||
| const densityInterval = 1 / (this.totalPoints - 1); | ||
|
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| for (let eventIndex = 0; eventIndex < this.totalPoints; eventIndex++) { | ||
| const quantile = eventIndex * densityInterval; | ||
|
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| const standardScore = Math.sqrt(2) * inverseError(2 * quantile - 1); | ||
| const timestamp = Math.round(meanTime + standardScore * this.width); | ||
|
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| if (timestamp >= startTime && timestamp <= endTime) { | ||
| yield* this.generateEvents(timestamp, eventIndex, map); | ||
| } | ||
| } | ||
| } | ||
|
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| private *generateEvents<TGeneratedFields extends Fields = TFields>( | ||
| timestamp: number, | ||
| eventIndex: number, | ||
| map: ( | ||
| timestamp: number, | ||
| index: number | ||
| ) => Serializable<TGeneratedFields> | Array<Serializable<TGeneratedFields>> | ||
| ): Generator<Serializable<TGeneratedFields>> { | ||
| const events = castArray(map(timestamp, eventIndex)); | ||
| for (const event of events) { | ||
| yield event; | ||
| } | ||
| } | ||
| } | ||
|
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| function inverseError(x: number): number { | ||
| const a = 0.147; | ||
| const sign = x < 0 ? -1 : 1; | ||
|
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| const part1 = 2 / (Math.PI * a) + Math.log(1 - x * x) / 2; | ||
| const part2 = Math.log(1 - x * x) / a; | ||
|
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| return sign * Math.sqrt(Math.sqrt(part1 * part1 - part2) - part1); | ||
| } |
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53 changes: 53 additions & 0 deletions
53
packages/kbn-apm-synthtrace-client/src/lib/poisson_events.test.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,53 @@ | ||
| /* | ||
| * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one | ||
| * or more contributor license agreements. Licensed under the "Elastic License | ||
| * 2.0", the "GNU Affero General Public License v3.0 only", and the "Server Side | ||
| * Public License v 1"; you may not use this file except in compliance with, at | ||
| * your election, the "Elastic License 2.0", the "GNU Affero General Public | ||
| * License v3.0 only", or the "Server Side Public License, v 1". | ||
| */ | ||
|
|
||
| import { PoissonEvents } from './poisson_events'; | ||
| import { Serializable } from './serializable'; | ||
|
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| describe('poisson events', () => { | ||
| it('generates events within the given time range', () => { | ||
| const poissonEvents = new PoissonEvents(new Date(1000), new Date(2000), 10); | ||
|
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| const events = Array.from( | ||
| poissonEvents.generator((timestamp) => new Serializable({ '@timestamp': timestamp })) | ||
| ); | ||
|
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| expect(events.length).toBeGreaterThanOrEqual(1); | ||
|
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| for (const event of events) { | ||
| expect(event.fields['@timestamp']).toBeGreaterThanOrEqual(1000); | ||
| expect(event.fields['@timestamp']).toBeLessThanOrEqual(2000); | ||
| } | ||
| }); | ||
|
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| it('generates at least one event if the rate is greater than 0', () => { | ||
| const poissonEvents = new PoissonEvents(new Date(1000), new Date(2000), 1); | ||
|
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| const events = Array.from( | ||
| poissonEvents.generator((timestamp) => new Serializable({ '@timestamp': timestamp })) | ||
| ); | ||
|
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| expect(events.length).toBeGreaterThanOrEqual(1); | ||
|
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| for (const event of events) { | ||
| expect(event.fields['@timestamp']).toBeGreaterThanOrEqual(1000); | ||
| expect(event.fields['@timestamp']).toBeLessThanOrEqual(2000); | ||
| } | ||
| }); | ||
|
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| it('generates no event if the rate is 0', () => { | ||
| const poissonEvents = new PoissonEvents(new Date(1000), new Date(2000), 0); | ||
|
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| const events = Array.from( | ||
| poissonEvents.generator((timestamp) => new Serializable({ '@timestamp': timestamp })) | ||
| ); | ||
|
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| expect(events.length).toBe(0); | ||
| }); | ||
| }); |
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