overleaf/services/document-updater/test/stress/js/run.js

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/* eslint-disable
no-return-assign,
no-unused-vars,
*/
// TODO: This file was created by bulk-decaffeinate.
// Fix any style issues and re-enable lint.
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/*
* decaffeinate suggestions:
* DS101: Remove unnecessary use of Array.from
* DS102: Remove unnecessary code created because of implicit returns
* DS202: Simplify dynamic range loops
* DS205: Consider reworking code to avoid use of IIFEs
* DS207: Consider shorter variations of null checks
* Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
*/
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const DocUpdaterClient = require('../../acceptance/js/helpers/DocUpdaterClient')
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// MockWebApi = require "../../acceptance/js/helpers/MockWebApi"
const assert = require('assert')
const async = require('async')
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const insert = function (string, pos, content) {
const result = string.slice(0, pos) + content + string.slice(pos)
return result
}
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const transform = function (op1, op2) {
if (op2.p < op1.p) {
return {
p: op1.p + op2.i.length,
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i: op1.i,
}
} else {
return op1
}
}
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class StressTestClient {
constructor(options) {
if (options == null) {
options = {}
}
this.options = options
if (this.options.updateDelay == null) {
this.options.updateDelay = 200
}
this.project_id = this.options.project_id || DocUpdaterClient.randomId()
this.doc_id = this.options.doc_id || DocUpdaterClient.randomId()
this.pos = this.options.pos || 0
this.content = this.options.content || ''
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this.client_id = DocUpdaterClient.randomId()
this.version = this.options.version || 0
this.inflight_op = null
this.charCode = 0
this.counts = {
conflicts: 0,
local_updates: 0,
remote_updates: 0,
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max_delay: 0,
}
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DocUpdaterClient.subscribeToAppliedOps((channel, update) => {
update = JSON.parse(update)
if (update.error != null) {
console.error(new Error(`Error from server: '${update.error}'`))
return
}
if (update.doc_id === this.doc_id) {
return this.processReply(update)
}
})
}
sendUpdate() {
const data = String.fromCharCode(65 + (this.charCode++ % 26))
this.content = insert(this.content, this.pos, data)
this.inflight_op = {
i: data,
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p: this.pos++,
}
this.resendUpdate()
return (this.inflight_op_sent = Date.now())
}
resendUpdate() {
assert(this.inflight_op != null)
DocUpdaterClient.sendUpdate(this.project_id, this.doc_id, {
doc: this.doc_id,
op: [this.inflight_op],
v: this.version,
meta: {
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source: this.client_id,
},
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dupIfSource: [this.client_id],
})
return (this.update_timer = setTimeout(() => {
console.log(
`[${new Date()}] \t[${this.client_id.slice(
0,
4
)}] WARN: Resending update after 5 seconds`
)
return this.resendUpdate()
}, 5000))
}
processReply(update) {
if (update.op.v !== this.version) {
if (update.op.v < this.version) {
console.log(
`[${new Date()}] \t[${this.client_id.slice(
0,
4
)}] WARN: Duplicate ack (already seen version)`
)
return
} else {
console.error(
`[${new Date()}] \t[${this.client_id.slice(
0,
4
)}] ERROR: Version jumped ahead (client: ${this.version}, op: ${
update.op.v
})`
)
}
}
this.version++
if (update.op.meta.source === this.client_id) {
if (this.inflight_op != null) {
this.counts.local_updates++
this.inflight_op = null
clearTimeout(this.update_timer)
const delay = Date.now() - this.inflight_op_sent
this.counts.max_delay = Math.max(this.counts.max_delay, delay)
return this.continue()
} else {
return console.log(
`[${new Date()}] \t[${this.client_id.slice(
0,
4
)}] WARN: Duplicate ack`
)
}
} else {
assert(update.op.op.length === 1)
this.counts.remote_updates++
let externalOp = update.op.op[0]
if (this.inflight_op != null) {
this.counts.conflicts++
this.inflight_op = transform(this.inflight_op, externalOp)
externalOp = transform(externalOp, this.inflight_op)
}
if (externalOp.p < this.pos) {
this.pos += externalOp.i.length
}
return (this.content = insert(this.content, externalOp.p, externalOp.i))
}
}
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continue() {
if (this.updateCount > 0) {
this.updateCount--
return setTimeout(
() => {
return this.sendUpdate()
},
this.options.updateDelay * (0.5 + Math.random())
)
} else {
return this.updateCallback()
}
}
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runForNUpdates(n, callback) {
if (callback == null) {
callback = function () {}
}
this.updateCallback = callback
this.updateCount = n
return this.continue()
}
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check(callback) {
if (callback == null) {
callback = function () {}
}
return DocUpdaterClient.getDoc(
this.project_id,
this.doc_id,
(error, res, body) => {
if (error != null) {
throw error
}
if (body.lines == null) {
return console.error(
`[${new Date()}] \t[${this.client_id.slice(
0,
4
)}] ERROR: Invalid response from get doc (${this.doc_id})`,
body
)
}
const content = body.lines.join('\n')
const { version } = body
if (content !== this.content) {
if (version === this.version) {
console.error(
`[${new Date()}] \t[${this.client_id.slice(
0,
4
)}] Error: Client content does not match server.`
)
console.error(`Server: ${content.split('a')}`)
console.error(`Client: ${this.content.split('a')}`)
} else {
console.error(
`[${new Date()}] \t[${this.client_id.slice(
0,
4
)}] Error: Version mismatch (Server: '${version}', Client: '${
this.version
}')`
)
}
}
if (!this.isContentValid(this.content)) {
const iterable = this.content.split('')
for (let i = 0; i < iterable.length; i++) {
const chunk = iterable[i]
if (chunk != null && chunk !== 'a') {
console.log(chunk, i)
}
}
throw new Error('bad content')
}
return callback()
}
)
}
isChunkValid(chunk) {
const char = 0
for (let i = 0; i < chunk.length; i++) {
const letter = chunk[i]
if (letter.charCodeAt(0) !== 65 + (i % 26)) {
console.error(
`[${new Date()}] \t[${this.client_id.slice(0, 4)}] Invalid Chunk:`,
chunk
)
return false
}
}
return true
}
isContentValid(content) {
for (const chunk of Array.from(content.split('a'))) {
if (chunk != null && chunk !== '') {
if (!this.isChunkValid(chunk)) {
console.error(
`[${new Date()}] \t[${this.client_id.slice(0, 4)}] Invalid content`,
content
)
return false
}
}
}
return true
}
}
const checkDocument = function (projectId, docId, clients, callback) {
if (callback == null) {
callback = function () {}
}
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const jobs = clients.map(client => cb => client.check(cb))
return async.parallel(jobs, callback)
}
const printSummary = function (docId, clients) {
const slot = require('cluster-key-slot')
const now = new Date()
console.log(
`[${now}] [${docId.slice(0, 4)} (slot: ${slot(docId)})] ${
clients.length
} clients...`
)
return (() => {
const result = []
for (const client of Array.from(clients)) {
console.log(
`[${now}] \t[${client.client_id.slice(0, 4)}] { local: ${
client.counts.local_updates
}, remote: ${client.counts.remote_updates}, conflicts: ${
client.counts.conflicts
}, max_delay: ${client.counts.max_delay} }`
)
result.push(
(client.counts = {
local_updates: 0,
remote_updates: 0,
conflicts: 0,
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max_delay: 0,
})
)
}
return result
})()
}
const CLIENT_COUNT = parseInt(process.argv[2], 10)
const UPDATE_DELAY = parseInt(process.argv[3], 10)
const SAMPLE_INTERVAL = parseInt(process.argv[4], 10)
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for (const docAndProjectId of Array.from(process.argv.slice(5))) {
;(function (docAndProjectId) {
const [projectId, docId] = Array.from(docAndProjectId.split(':'))
console.log({ projectId, docId })
return DocUpdaterClient.setDocLines(
projectId,
docId,
[new Array(CLIENT_COUNT + 2).join('a')],
null,
null,
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error => {
if (error != null) {
throw error
}
return DocUpdaterClient.getDoc(projectId, docId, (error, res, body) => {
let runBatch
if (error != null) {
throw error
}
if (body.lines == null) {
return console.error(
`[${new Date()}] ERROR: Invalid response from get doc (${docId})`,
body
)
}
const content = body.lines.join('\n')
const { version } = body
const clients = []
for (
let pos = 1, end = CLIENT_COUNT, asc = end >= 1;
asc ? pos <= end : pos >= end;
asc ? pos++ : pos--
) {
;(function (pos) {
const client = new StressTestClient({
doc_id: docId,
project_id: projectId,
content,
pos,
version,
updateDelay: UPDATE_DELAY,
})
return clients.push(client)
})(pos)
}
return (runBatch = function () {
const jobs = clients.map(
client => cb =>
client.runForNUpdates(SAMPLE_INTERVAL / UPDATE_DELAY, cb)
)
return async.parallel(jobs, error => {
if (error != null) {
throw error
}
printSummary(docId, clients)
return checkDocument(projectId, docId, clients, error => {
if (error != null) {
throw error
}
return runBatch()
})
})
})()
})
}
)
})(docAndProjectId)
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}