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9f10b292 C |
1 | 'use strict' |
2 | ||
1a42c9e2 C |
3 | const each = require('async/each') |
4 | const eachLimit = require('async/eachLimit') | |
35f1c54e | 5 | const map = require('lodash/map') |
aaf61f38 | 6 | const mongoose = require('mongoose') |
1a42c9e2 | 7 | const waterfall = require('async/waterfall') |
9f10b292 | 8 | |
f0f5567b C |
9 | const constants = require('../initializers/constants') |
10 | const logger = require('../helpers/logger') | |
f0f5567b | 11 | const requests = require('../helpers/requests') |
aaf61f38 | 12 | |
a3ee6fa2 | 13 | const Pod = mongoose.model('Pod') |
aaf61f38 | 14 | const Video = mongoose.model('Video') |
9f10b292 | 15 | |
f0f5567b | 16 | let timer = null |
9f10b292 | 17 | |
00057e85 | 18 | // --------------------------------------------------------------------------- |
9f10b292 | 19 | |
00057e85 C |
20 | const RequestSchema = mongoose.Schema({ |
21 | request: mongoose.Schema.Types.Mixed, | |
d3cd34be | 22 | to: [ { type: mongoose.Schema.Types.ObjectId, ref: 'Pod' } ] |
00057e85 | 23 | }) |
9f10b292 | 24 | |
00057e85 C |
25 | RequestSchema.statics = { |
26 | activate, | |
27 | deactivate, | |
28 | flush, | |
d3cd34be C |
29 | forceSend, |
30 | list | |
00057e85 | 31 | } |
9f10b292 | 32 | |
00057e85 C |
33 | RequestSchema.pre('save', function (next) { |
34 | const self = this | |
528a9efa | 35 | |
00057e85 | 36 | if (self.to.length === 0) { |
a3ee6fa2 | 37 | Pod.listAllIds(function (err, podIds) { |
00057e85 | 38 | if (err) return next(err) |
9f10b292 | 39 | |
00057e85 C |
40 | // No friends |
41 | if (podIds.length === 0) return | |
528a9efa | 42 | |
00057e85 C |
43 | self.to = podIds |
44 | return next() | |
528a9efa | 45 | }) |
00057e85 C |
46 | } else { |
47 | return next() | |
528a9efa | 48 | } |
00057e85 | 49 | }) |
528a9efa | 50 | |
00057e85 C |
51 | mongoose.model('Request', RequestSchema) |
52 | ||
53 | // ------------------------------ STATICS ------------------------------ | |
54 | ||
55 | function activate () { | |
56 | logger.info('Requests scheduler activated.') | |
d3cd34be | 57 | timer = setInterval(makeRequests.bind(this), constants.REQUESTS_INTERVAL) |
9f10b292 | 58 | } |
1fe5076f | 59 | |
9f10b292 | 60 | function deactivate () { |
e3647ae2 | 61 | logger.info('Requests scheduler deactivated.') |
9f10b292 C |
62 | clearInterval(timer) |
63 | } | |
1fe5076f | 64 | |
528a9efa | 65 | function flush () { |
00057e85 C |
66 | removeAll.call(this, function (err) { |
67 | if (err) logger.error('Cannot flush the requests.', { error: err }) | |
528a9efa C |
68 | }) |
69 | } | |
70 | ||
9f10b292 | 71 | function forceSend () { |
e3647ae2 | 72 | logger.info('Force requests scheduler sending.') |
00057e85 | 73 | makeRequests.call(this) |
9f10b292 | 74 | } |
c45f7f84 | 75 | |
d3cd34be C |
76 | function list (callback) { |
77 | this.find({ }, callback) | |
78 | } | |
79 | ||
9f10b292 | 80 | // --------------------------------------------------------------------------- |
c45f7f84 | 81 | |
8c255eb5 | 82 | // Make a requests to friends of a certain type |
528a9efa | 83 | function makeRequest (toPod, requestsToMake, callback) { |
9f10b292 | 84 | if (!callback) callback = function () {} |
c45f7f84 | 85 | |
528a9efa C |
86 | const params = { |
87 | toPod: toPod, | |
88 | encrypt: true, // Security | |
89 | sign: true, // To prove our identity | |
90 | method: 'POST', | |
91 | path: '/api/' + constants.API_VERSION + '/remote/videos', | |
92 | data: requestsToMake // Requests we need to make | |
93 | } | |
94 | ||
95 | // Make multiple retry requests to all of pods | |
96 | // The function fire some useful callbacks | |
97 | requests.makeSecureRequest(params, function (err, res) { | |
98 | if (err || (res.statusCode !== 200 && res.statusCode !== 201 && res.statusCode !== 204)) { | |
99 | logger.error('Error sending secure request to %s pod.', toPod.url, { error: err || new Error('Status code not 20x') }) | |
100 | ||
101 | return callback(false) | |
9f10b292 | 102 | } |
c45f7f84 | 103 | |
528a9efa | 104 | return callback(true) |
9f10b292 C |
105 | }) |
106 | } | |
107 | ||
8c255eb5 | 108 | // Make all the requests of the scheduler |
e3647ae2 | 109 | function makeRequests () { |
00057e85 C |
110 | const self = this |
111 | ||
b3595463 | 112 | listWithLimit.call(self, constants.REQUESTS_LIMIT, function (err, requests) { |
9f10b292 | 113 | if (err) { |
e3647ae2 | 114 | logger.error('Cannot get the list of requests.', { err: err }) |
9f10b292 C |
115 | return // Abort |
116 | } | |
117 | ||
8c255eb5 C |
118 | // If there are no requests, abort |
119 | if (requests.length === 0) { | |
120 | logger.info('No requests to make.') | |
121 | return | |
122 | } | |
9f10b292 | 123 | |
8c255eb5 C |
124 | logger.info('Making requests to friends.') |
125 | ||
528a9efa | 126 | // Requests by pods id |
8c255eb5 | 127 | const requestsToMake = {} |
9f10b292 | 128 | |
3c8ee69f | 129 | requests.forEach(function (poolRequest) { |
528a9efa C |
130 | poolRequest.to.forEach(function (toPodId) { |
131 | if (!requestsToMake[toPodId]) { | |
132 | requestsToMake[toPodId] = { | |
133 | ids: [], | |
134 | datas: [] | |
135 | } | |
136 | } | |
137 | ||
138 | requestsToMake[toPodId].ids.push(poolRequest._id) | |
139 | requestsToMake[toPodId].datas.push(poolRequest.request) | |
140 | }) | |
3c8ee69f | 141 | }) |
8d6ae227 | 142 | |
528a9efa C |
143 | const goodPods = [] |
144 | const badPods = [] | |
145 | ||
1a42c9e2 | 146 | eachLimit(Object.keys(requestsToMake), constants.REQUESTS_IN_PARALLEL, function (toPodId, callbackEach) { |
528a9efa C |
147 | const requestToMake = requestsToMake[toPodId] |
148 | ||
149 | // FIXME: mongodb request inside a loop :/ | |
a3ee6fa2 | 150 | Pod.load(toPodId, function (err, toPod) { |
00057e85 C |
151 | if (err) { |
152 | logger.error('Error finding pod by id.', { err: err }) | |
153 | return callbackEach() | |
154 | } | |
528a9efa C |
155 | |
156 | // Maybe the pod is not our friend anymore so simply remove them | |
157 | if (!toPod) { | |
00057e85 | 158 | removePodOf.call(self, requestToMake.ids, toPodId) |
528a9efa C |
159 | return callbackEach() |
160 | } | |
161 | ||
162 | makeRequest(toPod, requestToMake.datas, function (success) { | |
163 | if (err) { | |
164 | logger.error('Errors when sent request to %s.', toPod.url, { error: err }) | |
165 | // Do not stop the process just for one error | |
166 | return callbackEach() | |
167 | } | |
168 | ||
169 | if (success === true) { | |
170 | logger.debug('Removing requests for %s pod.', toPodId, { requestsIds: requestToMake.ids }) | |
3c8ee69f | 171 | |
528a9efa | 172 | // Remove the pod id of these request ids |
00057e85 | 173 | removePodOf.call(self, requestToMake.ids, toPodId) |
528a9efa C |
174 | goodPods.push(toPodId) |
175 | } else { | |
176 | badPods.push(toPodId) | |
177 | } | |
178 | ||
179 | callbackEach() | |
3c8ee69f | 180 | }) |
528a9efa C |
181 | }) |
182 | }, function () { | |
183 | // All the requests were made, we update the pods score | |
184 | updatePodsScore(goodPods, badPods) | |
185 | // Flush requests with no pod | |
00057e85 | 186 | removeWithEmptyTo.call(self) |
528a9efa | 187 | }) |
9f10b292 C |
188 | }) |
189 | } | |
0b697522 | 190 | |
8c255eb5 | 191 | // Remove pods with a score of 0 (too many requests where they were unreachable) |
9f10b292 | 192 | function removeBadPods () { |
1a42c9e2 | 193 | waterfall([ |
e856e334 | 194 | function findBadPods (callback) { |
a3ee6fa2 | 195 | Pod.listBadPods(function (err, pods) { |
e856e334 C |
196 | if (err) { |
197 | logger.error('Cannot find bad pods.', { error: err }) | |
198 | return callback(err) | |
199 | } | |
8d6ae227 | 200 | |
e856e334 C |
201 | return callback(null, pods) |
202 | }) | |
203 | }, | |
8d6ae227 | 204 | |
e856e334 C |
205 | function listVideosOfTheseBadPods (pods, callback) { |
206 | if (pods.length === 0) return callback(null) | |
0b697522 | 207 | |
e856e334 | 208 | const urls = map(pods, 'url') |
0b697522 | 209 | |
aaf61f38 | 210 | Video.listByUrls(urls, function (err, videosList) { |
8425cb89 | 211 | if (err) { |
e856e334 | 212 | logger.error('Cannot list videos urls.', { error: err, urls: urls }) |
a3ee6fa2 | 213 | return callback(null, pods, []) |
8425cb89 | 214 | } |
e856e334 | 215 | |
a3ee6fa2 | 216 | return callback(null, pods, videosList) |
45239549 | 217 | }) |
e856e334 C |
218 | }, |
219 | ||
a3ee6fa2 | 220 | function removeVideosOfTheseBadPods (pods, videosList, callback) { |
e856e334 | 221 | // We don't have to remove pods, skip |
a3ee6fa2 C |
222 | if (typeof pods === 'function') { |
223 | callback = pods | |
224 | return callback(null) | |
225 | } | |
e856e334 | 226 | |
1a42c9e2 | 227 | each(videosList, function (video, callbackEach) { |
aaf61f38 C |
228 | video.remove(callbackEach) |
229 | }, function (err) { | |
230 | if (err) { | |
231 | // Don't stop the process | |
232 | logger.error('Error while removing videos of bad pods.', { error: err }) | |
233 | return | |
234 | } | |
e856e334 | 235 | |
a3ee6fa2 | 236 | return callback(null, pods) |
e856e334 C |
237 | }) |
238 | }, | |
239 | ||
a3ee6fa2 | 240 | function removeBadPodsFromDB (pods, callback) { |
e856e334 | 241 | // We don't have to remove pods, skip |
a3ee6fa2 C |
242 | if (typeof pods === 'function') { |
243 | callback = pods | |
244 | return callback(null) | |
245 | } | |
246 | ||
1a42c9e2 | 247 | each(pods, function (pod, callbackEach) { |
a3ee6fa2 C |
248 | pod.remove(callbackEach) |
249 | }, function (err) { | |
250 | if (err) return callback(err) | |
e856e334 | 251 | |
a3ee6fa2 C |
252 | return callback(null, pods.length) |
253 | }) | |
e856e334 | 254 | } |
a3ee6fa2 | 255 | ], function (err, numberOfPodsRemoved) { |
e856e334 C |
256 | if (err) { |
257 | logger.error('Cannot remove bad pods.', { error: err }) | |
a3ee6fa2 C |
258 | } else if (numberOfPodsRemoved) { |
259 | logger.info('Removed %d pods.', numberOfPodsRemoved) | |
e856e334 C |
260 | } else { |
261 | logger.info('No need to remove bad pods.') | |
262 | } | |
9f10b292 C |
263 | }) |
264 | } | |
0b697522 | 265 | |
bc503c2a C |
266 | function updatePodsScore (goodPods, badPods) { |
267 | logger.info('Updating %d good pods and %d bad pods scores.', goodPods.length, badPods.length) | |
0b697522 | 268 | |
a3ee6fa2 | 269 | Pod.incrementScores(goodPods, constants.PODS_SCORE.BONUS, function (err) { |
9f10b292 C |
270 | if (err) logger.error('Cannot increment scores of good pods.') |
271 | }) | |
8425cb89 | 272 | |
a3ee6fa2 | 273 | Pod.incrementScores(badPods, constants.PODS_SCORE.MALUS, function (err) { |
8c255eb5 | 274 | if (err) logger.error('Cannot decrement scores of bad pods.') |
9f10b292 C |
275 | removeBadPods() |
276 | }) | |
277 | } | |
00057e85 | 278 | |
b3595463 C |
279 | function listWithLimit (limit, callback) { |
280 | this.find({ }, { _id: 1, request: 1, to: 1 }).sort({ _id: 1 }).limit(limit).exec(callback) | |
00057e85 C |
281 | } |
282 | ||
283 | function removeAll (callback) { | |
284 | this.remove({ }, callback) | |
285 | } | |
286 | ||
287 | function removePodOf (requestsIds, podId, callback) { | |
288 | if (!callback) callback = function () {} | |
289 | ||
290 | this.update({ _id: { $in: requestsIds } }, { $pull: { to: podId } }, { multi: true }, callback) | |
291 | } | |
292 | ||
293 | function removeWithEmptyTo (callback) { | |
294 | if (!callback) callback = function () {} | |
295 | ||
296 | this.remove({ to: { $size: 0 } }, callback) | |
297 | } |