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|
#!/usr/bin/env node
const minimist = require('minimist')
const loggerModule = require('./lib/logger')
const config = require('./lib/config')
const db = require('./lib/db')
const {Server, Connection, RequestMessage, ResponseMessage} = require('./lib/server')
const {Worker, STATUS_MANUAL} = require('./lib/worker')
/**
* @type {Worker}
*/
let worker
/**
* @type {Logger}
*/
let logger
/**
* @type {Server}
*/
let server
/**
* @type {object.<string, {connection: Connection, requestNo: number}>}
*/
let jobDoneAwaiters = {}
main().catch(e => {
console.error(e)
process.exit(1)
})
async function main() {
if (process.argv.length < 3) {
usage()
process.exit(0)
}
process.on('SIGINT', term)
process.on('SIGTERM', term)
const argv = minimist(process.argv.slice(2))
if (argv.help) {
usage()
process.exit(0)
}
if (!argv.config)
throw new Error('--config option is required')
// read config
try {
config.parseWorkerConfig(argv.config)
} catch (e) {
console.error(`config parsing error: ${e.message}`)
process.exit(1)
}
await loggerModule.init({
file: config.get('log_file'),
levelFile: config.get('log_level_file'),
levelConsole: config.get('log_level_console'),
})
logger = loggerModule.getLogger('jobd')
// init database
try {
await db.init()
} catch (error) {
logger.error('failed to connect to MySQL', error)
process.exit(1)
}
logger.info('db initialized')
// init queue
worker = new Worker()
for (let targetName in config.get('targets')) {
let slots = config.get('targets')[targetName].slots
// let target = new Target({name: targetName})
// queue.addTarget(target)
for (let slotName in slots) {
let slotLimit = slots[slotName]
worker.addSlot(targetName, slotName, slotLimit)
}
}
worker.on('job-done', (data) => {
if (jobDoneAwaiters[data.id] !== undefined) {
const {connection, requestNo} = jobDoneAwaiters[data.id]
connection.send(
new ResponseMessage(requestNo)
.setData(data)
)
connection.close()
delete jobDoneAwaiters[data.id]
}
})
logger.info('queue initialized')
// start server
server = new Server()
server.on('new-connection', (connection) => {
connection.on('request-message', onRequestMessage)
})
server.start(config.get('port'), config.get('host'))
logger.info('server started')
// connect to master
if (config.get('master_port') && config.get('master_host'))
connectToMaster()
}
/**
* @param {RequestMessage|ResponseMessage} message
* @param {Connection} connection
* @return {Promise<*>}
*/
async function onRequestMessage(message, connection) {
try {
logger.info('onMessage:', message)
switch (message.requestType) {
case 'poll':
const targets = message.requestData?.targets || []
if (!targets.length) {
connection.send(
new ResponseMessage(message.requestNo)
.setError('empty targets')
)
break
}
for (const t of targets) {
if (!worker.hasTarget(t)) {
connection.send(
new ResponseMessage(message.requestNo)
.setError(`invalid target '${t}'`)
)
break
}
}
worker.setPollTargets(targets)
worker.poll()
connection.send(
new ResponseMessage(message.requestNo)
.setData('ok')
)
break
case 'status':
const qs = worker.getStatus()
connection.send(
new ResponseMessage(message.requestNo)
.setData({
queue: qs,
jobDoneAwaitersCount: Object.keys(jobDoneAwaiters).length,
memoryUsage: process.memoryUsage()
})
)
break
case 'run-manual':
const {id} = message.requestData
if (id in jobDoneAwaiters) {
connection.send(
new ResponseMessage(message.requestNo)
.setError('another client is already waiting this job')
)
break
}
jobDoneAwaiters[id] = {
connection,
requestNo: message.requestNo
}
const {accepted, error} = await worker.getTasks(null, STATUS_MANUAL, {id})
if (!accepted) {
delete jobDoneAwaiters[id]
let message = 'failed to run task'
if (typeof error === 'string')
message += `: ${error}`
connection.send(
new ResponseMessage(message.requestNo)
.setError(message)
)
}
break
default:
connection.send(
new ResponseMessage(message.requestNo)
.setError(`unknown request type: '${message.requestType}'`)
)
break
}
} catch (error) {
logger.error(`error while handling message:`, message, error)
connection.send(
new ResponseMessage(message.requestNo)
.setError('server error: ' + error?.message)
)
}
}
function connectToMaster() {
const connection = new Connection()
connection.connect(config.get('master_host'), config.get('master_port'))
connection.on('connect', function() {
connection.sendRequest(
new RequestMessage('register-worker', {
targets: worker.getTargets()
})
)
.then(response => {
logger.debug('connectToMaster: response:', response)
})
.catch(error => {
logger.error('connectToMaster: error while awaiting response:', error)
})
})
connection.on('close', () => {
logger.warn(`connectToMaster: connection closed`)
setTimeout(() => {
connectToMaster()
}, config.get('master_reconnect_timeout') * 1000)
})
connection.on('request-message', onRequestMessage)
}
function usage() {
let s = `${process.argv[1]} OPTIONS
Options:
--config <path>
--help`
console.log(s)
}
function term() {
if (logger)
logger.info('shutdown')
loggerModule.shutdown(function() {
process.exit()
})
}
|
