3 const async = require('async')
4 const map = require('lodash/map')
5 const mongoose = require('mongoose')
7 const constants = require('../initializers/constants')
8 const logger = require('../helpers/logger')
9 const requests = require('../helpers/requests')
11 const Pod = mongoose.model('Pod')
12 const Video = mongoose.model('Video')
16 // ---------------------------------------------------------------------------
18 const RequestSchema = mongoose.Schema({
19 request: mongoose.Schema.Types.Mixed,
20 to: [ { type: mongoose.Schema.Types.ObjectId, ref: 'users' } ]
23 RequestSchema.statics = {
30 RequestSchema.pre('save', function (next) {
33 if (self.to.length === 0) {
34 Pod.listAllIds(function (err, podIds) {
35 if (err) return next(err)
38 if (podIds.length === 0) return
48 mongoose.model('Request', RequestSchema)
50 // ------------------------------ STATICS ------------------------------
52 function activate () {
53 logger.info('Requests scheduler activated.')
54 timer = setInterval(makeRequests.bind(this), constants.INTERVAL)
57 function deactivate () {
58 logger.info('Requests scheduler deactivated.')
63 removeAll.call(this, function (err) {
64 if (err) logger.error('Cannot flush the requests.', { error: err })
68 function forceSend () {
69 logger.info('Force requests scheduler sending.')
70 makeRequests.call(this)
73 // ---------------------------------------------------------------------------
75 // Make a requests to friends of a certain type
76 function makeRequest (toPod, requestsToMake, callback) {
77 if (!callback) callback = function () {}
81 encrypt: true, // Security
82 sign: true, // To prove our identity
84 path: '/api/' + constants.API_VERSION + '/remote/videos',
85 data: requestsToMake // Requests we need to make
88 // Make multiple retry requests to all of pods
89 // The function fire some useful callbacks
90 requests.makeSecureRequest(params, function (err, res) {
91 if (err || (res.statusCode !== 200 && res.statusCode !== 201 && res.statusCode !== 204)) {
92 logger.error('Error sending secure request to %s pod.', toPod.url, { error: err || new Error('Status code not 20x') })
94 return callback(false)
101 // Make all the requests of the scheduler
102 function makeRequests () {
105 list.call(self, function (err, requests) {
107 logger.error('Cannot get the list of requests.', { err: err })
111 // If there are no requests, abort
112 if (requests.length === 0) {
113 logger.info('No requests to make.')
117 logger.info('Making requests to friends.')
119 // Requests by pods id
120 const requestsToMake = {}
122 requests.forEach(function (poolRequest) {
123 poolRequest.to.forEach(function (toPodId) {
124 if (!requestsToMake[toPodId]) {
125 requestsToMake[toPodId] = {
131 requestsToMake[toPodId].ids.push(poolRequest._id)
132 requestsToMake[toPodId].datas.push(poolRequest.request)
139 async.eachLimit(Object.keys(requestsToMake), constants.REQUESTS_IN_PARALLEL, function (toPodId, callbackEach) {
140 const requestToMake = requestsToMake[toPodId]
142 // FIXME: mongodb request inside a loop :/
143 Pod.load(toPodId, function (err, toPod) {
145 logger.error('Error finding pod by id.', { err: err })
146 return callbackEach()
149 // Maybe the pod is not our friend anymore so simply remove them
151 removePodOf.call(self, requestToMake.ids, toPodId)
152 return callbackEach()
155 makeRequest(toPod, requestToMake.datas, function (success) {
157 logger.error('Errors when sent request to %s.', toPod.url, { error: err })
158 // Do not stop the process just for one error
159 return callbackEach()
162 if (success === true) {
163 logger.debug('Removing requests for %s pod.', toPodId, { requestsIds: requestToMake.ids })
165 // Remove the pod id of these request ids
166 removePodOf.call(self, requestToMake.ids, toPodId)
167 goodPods.push(toPodId)
169 badPods.push(toPodId)
176 // All the requests were made, we update the pods score
177 updatePodsScore(goodPods, badPods)
178 // Flush requests with no pod
179 removeWithEmptyTo.call(self)
184 // Remove pods with a score of 0 (too many requests where they were unreachable)
185 function removeBadPods () {
187 function findBadPods (callback) {
188 Pod.listBadPods(function (err, pods) {
190 logger.error('Cannot find bad pods.', { error: err })
194 return callback(null, pods)
198 function listVideosOfTheseBadPods (pods, callback) {
199 if (pods.length === 0) return callback(null)
201 const urls = map(pods, 'url')
203 Video.listByUrls(urls, function (err, videosList) {
205 logger.error('Cannot list videos urls.', { error: err, urls: urls })
206 return callback(null, pods, [])
209 return callback(null, pods, videosList)
213 function removeVideosOfTheseBadPods (pods, videosList, callback) {
214 // We don't have to remove pods, skip
215 if (typeof pods === 'function') {
217 return callback(null)
220 async.each(videosList, function (video, callbackEach) {
221 video.remove(callbackEach)
224 // Don't stop the process
225 logger.error('Error while removing videos of bad pods.', { error: err })
229 return callback(null, pods)
233 function removeBadPodsFromDB (pods, callback) {
234 // We don't have to remove pods, skip
235 if (typeof pods === 'function') {
237 return callback(null)
240 async.each(pods, function (pod, callbackEach) {
241 pod.remove(callbackEach)
243 if (err) return callback(err)
245 return callback(null, pods.length)
248 ], function (err, numberOfPodsRemoved) {
250 logger.error('Cannot remove bad pods.', { error: err })
251 } else if (numberOfPodsRemoved) {
252 logger.info('Removed %d pods.', numberOfPodsRemoved)
254 logger.info('No need to remove bad pods.')
259 function updatePodsScore (goodPods, badPods) {
260 logger.info('Updating %d good pods and %d bad pods scores.', goodPods.length, badPods.length)
262 Pod.incrementScores(goodPods, constants.PODS_SCORE.BONUS, function (err) {
263 if (err) logger.error('Cannot increment scores of good pods.')
266 Pod.incrementScores(badPods, constants.PODS_SCORE.MALUS, function (err) {
267 if (err) logger.error('Cannot decrement scores of bad pods.')
272 function list (callback) {
273 this.find({ }, { _id: 1, request: 1, to: 1 }).sort({ _id: 1 }).exec(callback)
276 function removeAll (callback) {
277 this.remove({ }, callback)
280 function removePodOf (requestsIds, podId, callback) {
281 if (!callback) callback = function () {}
283 this.update({ _id: { $in: requestsIds } }, { $pull: { to: podId } }, { multi: true }, callback)
286 function removeWithEmptyTo (callback) {
287 if (!callback) callback = function () {}
289 this.remove({ to: { $size: 0 } }, callback)