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;(function () {
'use strict'
var async = require('async')
var constants = require('./constants')
var logger = require('./logger')
var database = require('./database')
var pluck = require('lodash-node/compat/collection/pluck')
var PoolRequestsDB = database.PoolRequestsDB
var PodsDB = database.PodsDB
var utils = require('./utils')
var VideosDB = database.VideosDB
var poolRequests = {}
// ----------- Private -----------
var timer = null
function removePoolRequestsFromDB (ids) {
PoolRequestsDB.remove({ _id: { $in: ids } }, function (err) {
if (err) {
logger.error('Cannot remove requests from the pool requests database.', { error: err })
return
}
logger.info('Pool requests flushed.')
})
}
function makePoolRequests () {
logger.info('Making pool requests to friends.')
PoolRequestsDB.find({}, { _id: 1, type: 1, request: 1 }, function (err, pool_requests) {
if (err) throw err
if (pool_requests.length === 0) return
var requests = {
add: {
ids: [],
requests: []
},
remove: {
ids: [],
requests: []
}
}
async.each(pool_requests, function (pool_request, callback_each) {
if (pool_request.type === 'add') {
requests.add.requests.push(pool_request.request)
requests.add.ids.push(pool_request._id)
} else if (pool_request.type === 'remove') {
requests.remove.requests.push(pool_request.request)
requests.remove.ids.push(pool_request._id)
} else {
throw new Error('Unkown pool request type.')
}
callback_each()
}, function () {
// Send the add requests
if (requests.add.requests.length !== 0) {
makePoolRequest('add', requests.add.requests, function (err) {
if (err) logger.error('Errors when sent add pool requests.', { error: err })
removePoolRequestsFromDB(requests.add.ids)
})
}
// Send the remove requests
if (requests.remove.requests.length !== 0) {
makePoolRequest('remove', requests.remove.requests, function (err) {
if (err) logger.error('Errors when sent remove pool requests.', { error: err })
removePoolRequestsFromDB(requests.remove.ids)
})
}
})
})
}
function updatePodsScore (good_pods, bad_pods) {
logger.info('Updating %d good pods and %d bad pods scores.', good_pods.length, bad_pods.length)
PodsDB.update({ _id: { $in: good_pods } }, { $inc: { score: constants.PODS_SCORE.BONUS } }, { multi: true }).exec()
PodsDB.update({ _id: { $in: bad_pods } }, { $inc: { score: constants.PODS_SCORE.MALUS } }, { multi: true }, function (err) {
if (err) throw err
removeBadPods()
})
}
function removeBadPods () {
PodsDB.find({ score: 0 }, { _id: 1, url: 1 }, function (err, pods) {
if (err) throw err
if (pods.length === 0) return
var urls = pluck(pods, 'url')
var ids = pluck(pods, '_id')
VideosDB.remove({ podUrl: { $in: urls } }, function (err, r) {
if (err) logger.error('Cannot remove videos from a pod that we removing.', { error: err })
var videos_removed = r.result.n
logger.info('Removed %d videos.', videos_removed)
PodsDB.remove({ _id: { $in: ids } }, function (err, r) {
if (err) logger.error('Cannot remove bad pods.', { error: err })
var pods_removed = r.result.n
logger.info('Removed %d pods.', pods_removed)
})
})
})
}
function makePoolRequest (type, requests, callback) {
if (!callback) callback = function () {}
PodsDB.find({}, { _id: 1, url: 1, publicKey: 1 }).exec(function (err, pods) {
if (err) throw err
var params = {
encrypt: true,
sign: true,
method: 'POST',
path: null,
data: requests
}
if (type === 'add') {
params.path = '/api/' + constants.API_VERSION + '/remotevideos/add'
} else if (type === 'remove') {
params.path = '/api/' + constants.API_VERSION + '/remotevideos/remove'
} else {
throw new Error('Unkown pool request type.')
}
var bad_pods = []
var good_pods = []
utils.makeMultipleRetryRequest(params, pods, callbackEachPodFinished, callbackAllPodsFinished)
function callbackEachPodFinished (err, response, body, url, pod, callback_each_pod_finished) {
if (err || (response.statusCode !== 200 && response.statusCode !== 204)) {
bad_pods.push(pod._id)
logger.error('Error sending secure request to %s pod.', url, { error: err || new Error('Status code not 20x') })
} else {
good_pods.push(pod._id)
}
return callback_each_pod_finished()
}
function callbackAllPodsFinished (err) {
if (err) return callback(err)
updatePodsScore(good_pods, bad_pods)
callback(null)
}
})
}
// ----------- Public -----------
poolRequests.activate = function () {
logger.info('Pool requests activated.')
timer = setInterval(makePoolRequests, constants.INTERVAL)
}
poolRequests.addToPoolRequests = function (id, type, request) {
logger.debug('Add request to the pool requests.', { id: id, type: type, request: request })
PoolRequestsDB.findOne({ id: id }, function (err, entity) {
if (err) logger.error(err)
if (entity) {
if (entity.type === type) {
logger.error(new Error('Cannot insert two same requests.'))
return
}
// Remove the request of the other type
PoolRequestsDB.remove({ id: id }, function (err) {
if (err) logger.error(err)
})
} else {
PoolRequestsDB.create({ id: id, type: type, request: request }, function (err) {
if (err) logger.error(err)
})
}
})
}
poolRequests.deactivate = function () {
logger.info('Pool requests deactivated.')
clearInterval(timer)
}
poolRequests.forceSend = function () {
logger.info('Force pool requests sending.')
makePoolRequests()
}
module.exports = poolRequests
})()
|
