import { AbstractScheduler } from './abstract-scheduler' import { CONFIG, JOB_TTL, REDUNDANCY } from '../../initializers' import { logger } from '../../helpers/logger' import { VideosRedundancy } from '../../../shared/models/redundancy' import { VideoRedundancyModel } from '../../models/redundancy/video-redundancy' import { VideoFileModel } from '../../models/video/video-file' import { downloadWebTorrentVideo } from '../../helpers/webtorrent' import { join } from 'path' import { rename } from 'fs-extra' import { getServerActor } from '../../helpers/utils' import { sendCreateCacheFile, sendUpdateCacheFile } from '../activitypub/send' import { VideoModel } from '../../models/video/video' import { getVideoCacheFileActivityPubUrl } from '../activitypub/url' import { removeVideoRedundancy } from '../redundancy' export class VideosRedundancyScheduler extends AbstractScheduler { private static instance: AbstractScheduler private executing = false protected schedulerIntervalMs = CONFIG.REDUNDANCY.VIDEOS.CHECK_INTERVAL private constructor () { super() } async execute () { if (this.executing) return this.executing = true for (const obj of CONFIG.REDUNDANCY.VIDEOS.STRATEGIES) { logger.info('Running redundancy scheduler for strategy %s.', obj.strategy) try { const videoToDuplicate = await this.findVideoToDuplicate(obj) if (!videoToDuplicate) continue const videoFiles = videoToDuplicate.VideoFiles videoFiles.forEach(f => f.Video = videoToDuplicate) await this.purgeCacheIfNeeded(obj, videoFiles) if (await this.isTooHeavy(obj, videoFiles)) { logger.info('Video %s is too big for our cache, skipping.', videoToDuplicate.url) continue } logger.info('Will duplicate video %s in redundancy scheduler "%s".', videoToDuplicate.url, obj.strategy) await this.createVideoRedundancy(obj, videoFiles) } catch (err) { logger.error('Cannot run videos redundancy %s.', obj.strategy, { err }) } } await this.extendsLocalExpiration() await this.purgeRemoteExpired() this.executing = false } static get Instance () { return this.instance || (this.instance = new this()) } private async extendsLocalExpiration () { const expired = await VideoRedundancyModel.listLocalExpired() for (const redundancyModel of expired) { try { const redundancy = CONFIG.REDUNDANCY.VIDEOS.STRATEGIES.find(s => s.strategy === redundancyModel.strategy) await this.extendsExpirationOf(redundancyModel, redundancy.minLifetime) } catch (err) { logger.error('Cannot extend expiration of %s video from our redundancy system.', this.buildEntryLogId(redundancyModel)) } } } private async purgeRemoteExpired () { const expired = await VideoRedundancyModel.listRemoteExpired() for (const redundancyModel of expired) { try { await removeVideoRedundancy(redundancyModel) } catch (err) { logger.error('Cannot remove redundancy %s from our redundancy system.', this.buildEntryLogId(redundancyModel)) } } } private findVideoToDuplicate (cache: VideosRedundancy) { if (cache.strategy === 'most-views') { return VideoRedundancyModel.findMostViewToDuplicate(REDUNDANCY.VIDEOS.RANDOMIZED_FACTOR) } if (cache.strategy === 'trending') { return VideoRedundancyModel.findTrendingToDuplicate(REDUNDANCY.VIDEOS.RANDOMIZED_FACTOR) } if (cache.strategy === 'recently-added') { const minViews = cache.minViews return VideoRedundancyModel.findRecentlyAddedToDuplicate(REDUNDANCY.VIDEOS.RANDOMIZED_FACTOR, minViews) } } private async createVideoRedundancy (redundancy: VideosRedundancy, filesToDuplicate: VideoFileModel[]) { const serverActor = await getServerActor() for (const file of filesToDuplicate) { const existing = await VideoRedundancyModel.loadByFileId(file.id) if (existing) { await this.extendsExpirationOf(existing, redundancy.minLifetime) continue } // We need more attributes and check if the video still exists const video = await VideoModel.loadAndPopulateAccountAndServerAndTags(file.Video.id) if (!video) continue logger.info('Duplicating %s - %d in videos redundancy with "%s" strategy.', video.url, file.resolution, redundancy.strategy) const { baseUrlHttp, baseUrlWs } = video.getBaseUrls() const magnetUri = video.generateMagnetUri(file, baseUrlHttp, baseUrlWs) const tmpPath = await downloadWebTorrentVideo({ magnetUri }, JOB_TTL['video-import']) const destPath = join(CONFIG.STORAGE.VIDEOS_DIR, video.getVideoFilename(file)) await rename(tmpPath, destPath) const createdModel = await VideoRedundancyModel.create({ expiresOn: this.buildNewExpiration(redundancy.minLifetime), url: getVideoCacheFileActivityPubUrl(file), fileUrl: video.getVideoFileUrl(file, CONFIG.WEBSERVER.URL), strategy: redundancy.strategy, videoFileId: file.id, actorId: serverActor.id }) createdModel.VideoFile = file await sendCreateCacheFile(serverActor, createdModel) } } private async extendsExpirationOf (redundancy: VideoRedundancyModel, expiresAfterMs: number) { logger.info('Extending expiration of %s.', redundancy.url) const serverActor = await getServerActor() redundancy.expiresOn = this.buildNewExpiration(expiresAfterMs) await redundancy.save() await sendUpdateCacheFile(serverActor, redundancy) } private async purgeCacheIfNeeded (redundancy: VideosRedundancy, filesToDuplicate: VideoFileModel[]) { while (this.isTooHeavy(redundancy, filesToDuplicate)) { const toDelete = await VideoRedundancyModel.loadOldestLocalThatAlreadyExpired(redundancy.strategy, redundancy.minLifetime) if (!toDelete) return await removeVideoRedundancy(toDelete) } } private async isTooHeavy (redundancy: VideosRedundancy, filesToDuplicate: VideoFileModel[]) { const maxSize = redundancy.size - this.getTotalFileSizes(filesToDuplicate) const totalDuplicated = await VideoRedundancyModel.getTotalDuplicated(redundancy.strategy) return totalDuplicated > maxSize } private buildNewExpiration (expiresAfterMs: number) { return new Date(Date.now() + expiresAfterMs) } private buildEntryLogId (object: VideoRedundancyModel) { return `${object.VideoFile.Video.url}-${object.VideoFile.resolution}` } private getTotalFileSizes (files: VideoFileModel[]) { const fileReducer = (previous: number, current: VideoFileModel) => previous + current.size return files.reduce(fileReducer, 0) } }