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import { eachLimit } from 'async/eachLimit'
const db = require('../../initializers/database')
import { logger, makeSecureRequest } from '../../helpers'
import {
API_VERSION,
REQUESTS_IN_PARALLEL,
REQUESTS_INTERVAL
} from '../../initializers'
abstract class BaseRequestScheduler {
protected lastRequestTimestamp: number
protected timer: NodeJS.Timer
protected requestInterval: number
protected limitPods: number
protected limitPerPod: number
protected description: string
constructor () {
this.lastRequestTimestamp = 0
this.timer = null
this.requestInterval = REQUESTS_INTERVAL
}
abstract getRequestModel ()
abstract getRequestToPodModel ()
abstract buildRequestObjects (requests: any)
activate () {
logger.info('Requests scheduler activated.')
this.lastRequestTimestamp = Date.now()
this.timer = setInterval(() => {
this.lastRequestTimestamp = Date.now()
this.makeRequests()
}, this.requestInterval)
}
deactivate () {
logger.info('Requests scheduler deactivated.')
clearInterval(this.timer)
this.timer = null
}
forceSend () {
logger.info('Force requests scheduler sending.')
this.makeRequests()
}
remainingMilliSeconds () {
if (this.timer === null) return -1
return REQUESTS_INTERVAL - (Date.now() - this.lastRequestTimestamp)
}
remainingRequestsCount (callback) {
return this.getRequestModel().countTotalRequests(callback)
}
flush (callback) {
this.getRequestModel().removeAll(callback)
}
// ---------------------------------------------------------------------------
// Make a requests to friends of a certain type
protected makeRequest (toPod, requestEndpoint, requestsToMake, callback) {
if (!callback) callback = function () { /* empty */ }
const params = {
toPod: toPod,
sign: true, // Prove our identity
method: 'POST',
path: '/api/' + API_VERSION + '/remote/' + requestEndpoint,
data: requestsToMake // Requests we need to make
}
// Make multiple retry requests to all of pods
// The function fire some useful callbacks
makeSecureRequest(params, (err, res) => {
if (err || (res.statusCode !== 200 && res.statusCode !== 201 && res.statusCode !== 204)) {
err = err ? err.message : 'Status code not 20x : ' + res.statusCode
logger.error('Error sending secure request to %s pod.', toPod.host, { error: err })
return callback(err)
}
return callback(null)
})
}
// Make all the requests of the scheduler
protected makeRequests () {
this.getRequestModel().listWithLimitAndRandom(this.limitPods, this.limitPerPod, (err, requests) => {
if (err) {
logger.error('Cannot get the list of "%s".', this.description, { err: err })
return // Abort
}
// If there are no requests, abort
if (requests.length === 0) {
logger.info('No "%s" to make.', this.description)
return
}
// We want to group requests by destinations pod and endpoint
const requestsToMakeGrouped = this.buildRequestObjects(requests)
logger.info('Making "%s" to friends.', this.description)
const goodPods = []
const badPods = []
eachLimit(Object.keys(requestsToMakeGrouped), REQUESTS_IN_PARALLEL, (hashKey, callbackEach) => {
const requestToMake = requestsToMakeGrouped[hashKey]
const toPod = requestToMake.toPod
this.makeRequest(toPod, requestToMake.endpoint, requestToMake.datas, (err) => {
if (err) {
badPods.push(requestToMake.toPod.id)
return callbackEach()
}
logger.debug('Removing requests for pod %s.', requestToMake.toPod.id, { requestsIds: requestToMake.ids })
goodPods.push(requestToMake.toPod.id)
// Remove the pod id of these request ids
this.getRequestToPodModel().removeByRequestIdsAndPod(requestToMake.ids, requestToMake.toPod.id, callbackEach)
this.afterRequestHook()
})
}, () => {
// All the requests were made, we update the pods score
db.Pod.updatePodsScore(goodPods, badPods)
this.afterRequestsHook()
})
})
}
protected afterRequestHook () {
// Nothing to do, let children reimplement it
}
protected afterRequestsHook () {
// Nothing to do, let children reimplement it
}
}
// ---------------------------------------------------------------------------
export {
BaseRequestScheduler
}
|
