'use strict'
-const eachLimit = require('async/eachLimit')
-
const constants = require('../initializers/constants')
+const BaseRequestScheduler = require('./base-request-scheduler')
const db = require('../initializers/database')
const logger = require('../helpers/logger')
-const requests = require('../helpers/requests')
-module.exports = class RequestScheduler {
+module.exports = class RequestScheduler extends BaseRequestScheduler {
constructor () {
- this.lastRequestTimestamp = 0
- this.timer = null
- }
+ super()
- activate () {
- logger.info('Requests scheduler activated.')
- this.lastRequestTimestamp = Date.now()
+ // We limit the size of the requests
+ this.limitPods = constants.REQUESTS_LIMIT_PODS
+ this.limitPerPod = constants.REQUESTS_LIMIT_PER_POD
- this.timer = setInterval(() => {
- this.lastRequestTimestamp = Date.now()
- this.makeRequests()
- }, constants.REQUESTS_INTERVAL)
+ this.description = 'requests'
}
- deactivate () {
- logger.info('Requests scheduler deactivated.')
- clearInterval(this.timer)
- this.timer = null
+ getRequestModel () {
+ return db.Request
}
- forceSend () {
- logger.info('Force requests scheduler sending.')
- this.makeRequests()
+ getRequestToPodModel () {
+ return db.RequestToPod
}
- remainingMilliSeconds () {
- if (this.timer === null) return -1
+ buildRequestObjects (requests) {
+ const requestsToMakeGrouped = {}
+
+ Object.keys(requests).forEach(toPodId => {
+ requests[toPodId].forEach(data => {
+ const request = data.request
+ const pod = data.pod
+ const hashKey = toPodId + request.endpoint
+
+ if (!requestsToMakeGrouped[hashKey]) {
+ requestsToMakeGrouped[hashKey] = {
+ toPod: pod,
+ endpoint: request.endpoint,
+ ids: [], // request ids, to delete them from the DB in the future
+ datas: [] // requests data,
+ }
+ }
+
+ requestsToMakeGrouped[hashKey].ids.push(request.id)
+ requestsToMakeGrouped[hashKey].datas.push(request.request)
+ })
+ })
- return constants.REQUESTS_INTERVAL - (Date.now() - this.lastRequestTimestamp)
+ return requestsToMakeGrouped
}
// { type, endpoint, data, toIds, transaction }
// ---------------------------------------------------------------------------
- // Make all the requests of the scheduler
- makeRequests () {
- // We limit the size of the requests
- // We don't want to stuck with the same failing requests so we get a random list
- db.Request.listWithLimitAndRandom(constants.REQUESTS_LIMIT_PODS, constants.REQUESTS_LIMIT_PER_POD, (err, requests) => {
- if (err) {
- logger.error('Cannot get the list of requests.', { err: err })
- return // Abort
- }
-
- // If there are no requests, abort
- if (requests.length === 0) {
- logger.info('No requests to make.')
- return
- }
-
- // We want to group requests by destinations pod and endpoint
- const requestsToMakeGrouped = this.buildRequestObjects(requests)
-
- logger.info('Making requests to friends.')
-
- const goodPods = []
- const badPods = []
-
- eachLimit(Object.keys(requestsToMakeGrouped), constants.REQUESTS_IN_PARALLEL, (hashKey, callbackEach) => {
- const requestToMake = requestsToMakeGrouped[hashKey]
- const toPod = requestToMake.toPod
-
- // Maybe the pod is not our friend anymore so simply remove it
- if (!toPod) {
- const requestIdsToDelete = requestToMake.ids
-
- logger.info('Removing %d requests of unexisting pod %s.', requestIdsToDelete.length, requestToMake.toPod.id)
- return db.RequestToPod.removePodOf(requestIdsToDelete, requestToMake.toPod.id, callbackEach)
- }
-
- this.makeRequest(toPod, requestToMake.endpoint, requestToMake.datas, (success) => {
- if (success === false) {
- 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
- db.RequestToPod.removePodOf(requestToMake.ids, requestToMake.toPod.id, callbackEach)
- })
- }, () => {
- // All the requests were made, we update the pods score
- db.Request.updatePodsScore(goodPods, badPods)
- // Flush requests with no pod
- db.Request.removeWithEmptyTo(err => {
- if (err) logger.error('Error when removing requests with no pods.', { error: err })
- })
- })
- })
- }
-
- // Make a requests to friends of a certain type
- makeRequest (toPod, requestEndpoint, requestsToMake, callback) {
- if (!callback) callback = function () {}
-
- const params = {
- toPod: toPod,
- sign: true, // Prove our identity
- method: 'POST',
- path: '/api/' + constants.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
- requests.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(false)
- }
-
- return callback(true)
- })
- }
-
- buildRequestObjects (requests) {
- const requestsToMakeGrouped = {}
-
- Object.keys(requests).forEach(toPodId => {
- requests[toPodId].forEach(data => {
- const request = data.request
- const pod = data.pod
- const hashKey = toPodId + request.endpoint
-
- if (!requestsToMakeGrouped[hashKey]) {
- requestsToMakeGrouped[hashKey] = {
- toPod: pod,
- endpoint: request.endpoint,
- ids: [], // request ids, to delete them from the DB in the future
- datas: [] // requests data,
- }
- }
-
- requestsToMakeGrouped[hashKey].ids.push(request.id)
- requestsToMakeGrouped[hashKey].datas.push(request.request)
- })
- })
-
- return requestsToMakeGrouped
- }
-
- flush (callback) {
- db.Request.removeAll(err => {
- if (err) logger.error('Cannot flush the requests.', { error: err })
-
- return callback(err)
+ afterRequestsHook () {
+ // Flush requests with no pod
+ this.getRequestModel().removeWithEmptyTo(err => {
+ if (err) logger.error('Error when removing requests with no pods.', { error: err })
})
}
}