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Queue.js
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Queue.js
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'use strict'
const Bull = require('bull')
const BullBoard = require('bull-board')
const humanInterval = require('human-interval')
const differenceInMilliseconds = require('date-fns/differenceInMilliseconds')
const parseISO = require('date-fns/parseISO')
const fs = require('fs')
class Queue {
constructor(Logger, Config, jobs, app, resolver) {
this.Logger = Logger
this.jobs = jobs
this.app = app
this.resolver = resolver
this._queues = null
const { connection, ...connections } = Config.get('bull')
this.config = connections[connection]
this.connections = connections
}
_getJobListeners(Job) {
const jobListeners = Object.getOwnPropertyNames(Job.prototype)
.filter((method) => method.startsWith('on'))
.map((method) => {
const eventName = method
.replace(/^on(\w)/, (match, group) => group.toLowerCase())
.replace(/([A-Z]+)/, (match, group) => ` ${group.toLowerCase()}`)
return { eventName, method }
})
return jobListeners
}
get queues() {
if (!this._queues) {
this._queues = this.jobs.reduce((queues, path) => {
const Job = this.app.use(path)
let config = this.config
if (Job.connection) {
config = this.connections[Job.connection]
}
queues[Job.key] = {
bull: new Bull(Job.key, config),
Job,
name: Job.key,
handle: Job.handle,
concurrency: Job.concurrency || 1,
options: Job.options,
}
return queues
}, {})
}
return this._queues
}
get(name) {
return this.queues[name]
}
add(name, data, options) {
const queue = this.get(name)
const job = queue.bull.add(data, { ...queue.options, ...options })
return job
}
removeRepeatable(name, repeat) {
const queue = this.get(name)
return queue.bull.removeRepeatable('__default__', repeat)
}
getRepeatableJobs(name) {
const queue = this.get(name)
const jobs = queue.bull.getRepeatableJobs()
return jobs
}
schedule(name, data, date, options) {
let delay
if (typeof date === 'number' || date instanceof Number) {
delay = date
} else {
if (typeof date === 'string' || date instanceof String) {
const byHuman = humanInterval(date)
if (!isNaN(byHuman)) {
delay = byHuman
} else {
delay = differenceInMilliseconds(parseISO(date), new Date())
}
} else {
delay = differenceInMilliseconds(date, new Date())
}
}
if (delay > 0) {
return this.add(name, data, { ...options, delay })
} else {
throw new Error('Invalid schedule time')
}
}
ui(port = 9999, hostname = 'localhost') {
BullBoard.setQueues(
Object.values(this.queues).map(
(queue) => new BullBoard.BullAdapter(queue.bull)
)
)
const server = BullBoard.router.listen(port, hostname, () => {
this.Logger.info(`bull board on http://${hostname}:${port}`)
})
const shutdown = () => {
server.close(() => {
this.Logger.info('Stopping bull board server')
process.exit(0)
})
}
process.on('SIGTERM', shutdown)
process.on('SIGINT', shutdown)
}
async remove(name, jobId) {
const job = await this.queues[name].bull.getJob(jobId)
job.remove()
}
/* eslint handle-callback-err: "error" */
handleException(error, job) {
try {
const exceptionHandlerFile = this.resolver
.forDir('exceptions')
.getPath('QueueHandler.js')
fs.accessSync(exceptionHandlerFile, fs.constants.R_OK)
const namespace = this.resolver
.forDir('exceptions')
.translate('QueueHandler')
const handler = this.app.make(this.app.use(namespace))
handler.report(error, job)
} catch (err) {
this.Logger.error(`name=${job.queue.name} id=${job.id}`)
}
}
process() {
this.Logger.info('Queue processing started')
Object.values(this.queues).forEach((queue) => {
const Job = new queue.Job()
const jobListeners = this._getJobListeners(queue.Job)
jobListeners.forEach(function (item) {
queue.bull.on(item.eventName, Job[item.method].bind(Job))
})
queue.bull.process(queue.concurrency, (job, done) => {
Job.handle(job)
.then((result) => {
done(null, result)
})
.catch((error) => {
this.handleException(error, job)
done(error)
})
})
})
const shutdown = () => {
const promises = Object.values(this.queues).map((queue) => {
return queue.bull.close()
})
return Promise.all(promises).then(process.exit(0))
}
process.on('SIGTERM', shutdown)
process.on('SIGINT', shutdown)
return this
}
}
module.exports = Queue