7 files changed, 193 insertions, 70 deletions

diff --git a/server/controllers/activitypub/inbox.ts b/server/controllers/activitypub/inbox.ts
index 67b2c0d66..14f301ab7 100644
--- a/server/controllers/activitypub/inbox.ts
+++ b/server/controllers/activitypub/inbox.ts
@@ -1,13 +1,11 @@
 import * as express from 'express'
+import { InboxManager } from '@server/lib/activitypub/inbox-manager'
 import { Activity, ActivityPubCollection, ActivityPubOrderedCollection, RootActivity } from '../../../shared'
+import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 import { isActivityValid } from '../../helpers/custom-validators/activitypub/activity'
 import { logger } from '../../helpers/logger'
-import { processActivities } from '../../lib/activitypub/process/process'
 import { asyncMiddleware, checkSignature, localAccountValidator, localVideoChannelValidator, signatureValidator } from '../../middlewares'
 import { activityPubValidator } from '../../middlewares/validators/activitypub/activity'
-import { queue } from 'async'
-import { MActorDefault, MActorSignature } from '../../types/models'
-import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 
 const inboxRouter = express.Router()
 
@@ -41,18 +39,6 @@ export {
 
 // ---------------------------------------------------------------------------
 
-type QueueParam = { activities: Activity[], signatureActor?: MActorSignature, inboxActor?: MActorDefault }
-const inboxQueue = queue<QueueParam, Error>((task, cb) => {
-  const options = { signatureActor: task.signatureActor, inboxActor: task.inboxActor }
-
-  processActivities(task.activities, options)
-    .then(() => cb())
-    .catch(err => {
-      logger.error('Error in process activities.', { err })
-      cb()
-    })
-})
-
 function inboxController (req: express.Request, res: express.Response) {
   const rootActivity: RootActivity = req.body
   let activities: Activity[]
@@ -74,10 +60,12 @@ function inboxController (req: express.Request, res: express.Response) {
 
   logger.info('Receiving inbox requests for %d activities by %s.', activities.length, res.locals.signature.actor.url)
 
-  inboxQueue.push({
+  InboxManager.Instance.addInboxMessage({
     activities,
     signatureActor: res.locals.signature.actor,
-    inboxActor: accountOrChannel ? accountOrChannel.Actor : undefined
+    inboxActor: accountOrChannel
+      ? accountOrChannel.Actor
+      : undefined
   })
 
   return res.status(HttpStatusCode.NO_CONTENT_204).end()
diff --git a/server/controllers/api/server/stats.ts b/server/controllers/api/server/stats.ts
index f07301a04..3aea12450 100644
--- a/server/controllers/api/server/stats.ts
+++ b/server/controllers/api/server/stats.ts
@@ -1,16 +1,8 @@
 import * as express from 'express'
-import { ServerStats } from '../../../../shared/models/server/server-stats.model'
-import { asyncMiddleware } from '../../../middlewares'
-import { UserModel } from '../../../models/account/user'
-import { ActorFollowModel } from '../../../models/activitypub/actor-follow'
-import { VideoModel } from '../../../models/video/video'
-import { VideoCommentModel } from '../../../models/video/video-comment'
-import { VideoRedundancyModel } from '../../../models/redundancy/video-redundancy'
+import { StatsManager } from '@server/lib/stat-manager'
 import { ROUTE_CACHE_LIFETIME } from '../../../initializers/constants'
+import { asyncMiddleware } from '../../../middlewares'
 import { cacheRoute } from '../../../middlewares/cache'
-import { VideoFileModel } from '../../../models/video/video-file'
-import { CONFIG } from '../../../initializers/config'
-import { VideoRedundancyStrategyWithManual } from '@shared/models'
 
 const statsRouter = express.Router()
 
@@ -19,48 +11,10 @@ statsRouter.get('/stats',
   asyncMiddleware(getStats)
 )
 
-async function getStats (req: express.Request, res: express.Response) {
-  const { totalLocalVideos, totalLocalVideoViews, totalVideos } = await VideoModel.getStats()
-  const { totalLocalVideoComments, totalVideoComments } = await VideoCommentModel.getStats()
-  const { totalUsers, totalDailyActiveUsers, totalWeeklyActiveUsers, totalMonthlyActiveUsers } = await UserModel.getStats()
-  const { totalInstanceFollowers, totalInstanceFollowing } = await ActorFollowModel.getStats()
-  const { totalLocalVideoFilesSize } = await VideoFileModel.getStats()
-
-  const strategies = CONFIG.REDUNDANCY.VIDEOS.STRATEGIES
-                          .map(r => ({
-                            strategy: r.strategy as VideoRedundancyStrategyWithManual,
-                            size: r.size
-                          }))
-
-  strategies.push({ strategy: 'manual', size: null })
-
-  const videosRedundancyStats = await Promise.all(
-    strategies.map(r => {
-      return VideoRedundancyModel.getStats(r.strategy)
-        .then(stats => Object.assign(stats, { strategy: r.strategy, totalSize: r.size }))
-    })
-  )
-
-  const data: ServerStats = {
-    totalLocalVideos,
-    totalLocalVideoViews,
-    totalLocalVideoFilesSize,
-    totalLocalVideoComments,
-    totalVideos,
-    totalVideoComments,
-
-    totalUsers,
-    totalDailyActiveUsers,
-    totalWeeklyActiveUsers,
-    totalMonthlyActiveUsers,
-
-    totalInstanceFollowers,
-    totalInstanceFollowing,
-
-    videosRedundancy: videosRedundancyStats
-  }
+async function getStats (_req: express.Request, res: express.Response) {
+  const data = await StatsManager.Instance.getStats()
 
-  return res.json(data).end()
+  return res.json(data)
 }
 
 // ---------------------------------------------------------------------------
diff --git a/server/initializers/constants.ts b/server/initializers/constants.ts
index 9e642af95..01860b575 100644
--- a/server/initializers/constants.ts
+++ b/server/initializers/constants.ts
@@ -194,7 +194,8 @@ const SCHEDULER_INTERVALS_MS = {
   checkPlugins: CONFIG.PLUGINS.INDEX.CHECK_LATEST_VERSIONS_INTERVAL,
   autoFollowIndexInstances: 60000 * 60 * 24, // 1 day
   removeOldViews: 60000 * 60 * 24, // 1 day
-  removeOldHistory: 60000 * 60 * 24 // 1 day
+  removeOldHistory: 60000 * 60 * 24, // 1 day
+  updateInboxStats: 1000 * 60 * 5 // 5 minutes
 }
 
 // ---------------------------------------------------------------------------
@@ -747,6 +748,7 @@ if (isTestInstance() === true) {
   SCHEDULER_INTERVALS_MS.removeOldViews = 5000
   SCHEDULER_INTERVALS_MS.updateVideos = 5000
   SCHEDULER_INTERVALS_MS.autoFollowIndexInstances = 5000
+  SCHEDULER_INTERVALS_MS.updateInboxStats = 5000
   REPEAT_JOBS['videos-views'] = { every: 5000 }
 
   REDUNDANCY.VIDEOS.RANDOMIZED_FACTOR = 1
diff --git a/server/lib/activitypub/inbox-manager.ts b/server/lib/activitypub/inbox-manager.ts
new file mode 100644
index 000000000..19e112f91
--- /dev/null
+++ b/server/lib/activitypub/inbox-manager.ts
@@ -0,0 +1,55 @@
+import { AsyncQueue, queue } from 'async'
+import { logger } from '@server/helpers/logger'
+import { SCHEDULER_INTERVALS_MS } from '@server/initializers/constants'
+import { MActorDefault, MActorSignature } from '@server/types/models'
+import { Activity } from '@shared/models'
+import { processActivities } from './process'
+import { StatsManager } from '../stat-manager'
+
+type QueueParam = {
+  activities: Activity[]
+  signatureActor?: MActorSignature
+  inboxActor?: MActorDefault
+}
+
+class InboxManager {
+
+  private static instance: InboxManager
+
+  private readonly inboxQueue: AsyncQueue<QueueParam>
+
+  private messagesProcessed = 0
+
+  private constructor () {
+    this.inboxQueue = queue<QueueParam, Error>((task, cb) => {
+      const options = { signatureActor: task.signatureActor, inboxActor: task.inboxActor }
+
+      this.messagesProcessed++
+
+      processActivities(task.activities, options)
+        .then(() => cb())
+        .catch(err => {
+          logger.error('Error in process activities.', { err })
+          cb()
+        })
+    })
+
+    setInterval(() => {
+      StatsManager.Instance.updateInboxStats(this.messagesProcessed, this.inboxQueue.length())
+    }, SCHEDULER_INTERVALS_MS.updateInboxStats)
+  }
+
+  addInboxMessage (options: QueueParam) {
+    this.inboxQueue.push(options)
+  }
+
+  static get Instance () {
+    return this.instance || (this.instance = new this())
+  }
+}
+
+// ---------------------------------------------------------------------------
+
+export {
+  InboxManager
+}
diff --git a/server/lib/stat-manager.ts b/server/lib/stat-manager.ts
new file mode 100644
index 000000000..f9d69b0dc
--- /dev/null
+++ b/server/lib/stat-manager.ts
@@ -0,0 +1,94 @@
+import { CONFIG } from '@server/initializers/config'
+import { UserModel } from '@server/models/account/user'
+import { ActorFollowModel } from '@server/models/activitypub/actor-follow'
+import { VideoRedundancyModel } from '@server/models/redundancy/video-redundancy'
+import { VideoModel } from '@server/models/video/video'
+import { VideoCommentModel } from '@server/models/video/video-comment'
+import { VideoFileModel } from '@server/models/video/video-file'
+import { ServerStats, VideoRedundancyStrategyWithManual } from '@shared/models'
+
+class StatsManager {
+
+  private static instance: StatsManager
+
+  private readonly instanceStartDate = new Date()
+
+  private inboxMessagesProcessed = 0
+  private inboxMessagesWaiting = 0
+
+  private constructor () {}
+
+  updateInboxStats (inboxMessagesProcessed: number, inboxMessagesWaiting: number) {
+    this.inboxMessagesProcessed = inboxMessagesProcessed
+    this.inboxMessagesWaiting = inboxMessagesWaiting
+  }
+
+  async getStats () {
+    const { totalLocalVideos, totalLocalVideoViews, totalVideos } = await VideoModel.getStats()
+    const { totalLocalVideoComments, totalVideoComments } = await VideoCommentModel.getStats()
+    const { totalUsers, totalDailyActiveUsers, totalWeeklyActiveUsers, totalMonthlyActiveUsers } = await UserModel.getStats()
+    const { totalInstanceFollowers, totalInstanceFollowing } = await ActorFollowModel.getStats()
+    const { totalLocalVideoFilesSize } = await VideoFileModel.getStats()
+
+    const videosRedundancyStats = await this.buildRedundancyStats()
+
+    const data: ServerStats = {
+      totalLocalVideos,
+      totalLocalVideoViews,
+      totalLocalVideoFilesSize,
+      totalLocalVideoComments,
+      totalVideos,
+      totalVideoComments,
+
+      totalUsers,
+      totalDailyActiveUsers,
+      totalWeeklyActiveUsers,
+      totalMonthlyActiveUsers,
+
+      totalInstanceFollowers,
+      totalInstanceFollowing,
+
+      videosRedundancy: videosRedundancyStats,
+
+      totalActivityPubMessagesProcessed: this.inboxMessagesProcessed,
+      activityPubMessagesProcessedPerSecond: this.buildActivityPubMessagesProcessedPerSecond(),
+      totalActivityPubMessagesWaiting: this.inboxMessagesWaiting
+    }
+
+    return data
+  }
+
+  private buildActivityPubMessagesProcessedPerSecond () {
+    const now = new Date()
+    const startedSeconds = (now.getTime() - this.instanceStartDate.getTime()) / 1000
+
+    return this.inboxMessagesProcessed / startedSeconds
+  }
+
+  private buildRedundancyStats () {
+    const strategies = CONFIG.REDUNDANCY.VIDEOS.STRATEGIES
+                                               .map(r => ({
+                                                 strategy: r.strategy as VideoRedundancyStrategyWithManual,
+                                                 size: r.size
+                                               }))
+
+    strategies.push({ strategy: 'manual', size: null })
+
+    return Promise.all(
+      strategies.map(r => {
+        return VideoRedundancyModel.getStats(r.strategy)
+          .then(stats => Object.assign(stats, { strategy: r.strategy, totalSize: r.size }))
+      })
+    )
+  }
+
+  static get Instance () {
+    return this.instance || (this.instance = new this())
+  }
+}
+
+// ---------------------------------------------------------------------------
+
+export {
+  StatsManager
+}
diff --git a/server/tests/api/server/stats.ts b/server/tests/api/server/stats.ts
index 0e77712cf..9f785a80e 100644
--- a/server/tests/api/server/stats.ts
+++ b/server/tests/api/server/stats.ts
@@ -176,6 +176,32 @@ describe('Test stats (excluding redundancy)', function () {
     }
   })
 
+  it('Should have the correct AP stats', async function () {
+    this.timeout(60000)
+
+    for (let i = 0; i < 10; i++) {
+      await uploadVideo(servers[0].url, servers[0].accessToken, { name: 'video' })
+    }
+
+    const res1 = await getStats(servers[1].url)
+    const first = res1.body as ServerStats
+
+    await waitJobs(servers)
+
+    const res2 = await getStats(servers[1].url)
+    const second: ServerStats = res2.body
+
+    expect(second.totalActivityPubMessagesWaiting).to.equal(0)
+    expect(second.totalActivityPubMessagesProcessed).to.be.greaterThan(first.totalActivityPubMessagesProcessed)
+
+    await wait(5000)
+
+    const res3 = await getStats(servers[1].url)
+    const third: ServerStats = res3.body
+
+    expect(third.activityPubMessagesProcessedPerSecond).to.be.lessThan(second.activityPubMessagesProcessedPerSecond)
+  })
+
   after(async function () {
     await cleanupTests(servers)
   })
diff --git a/shared/models/server/server-stats.model.ts b/shared/models/server/server-stats.model.ts
index 75d7dc554..d17c43945 100644
--- a/shared/models/server/server-stats.model.ts
+++ b/shared/models/server/server-stats.model.ts
@@ -18,6 +18,10 @@ export interface ServerStats {
   totalInstanceFollowing: number
 
   videosRedundancy: VideosRedundancyStats[]
+
+  totalActivityPubMessagesProcessed: number
+  activityPubMessagesProcessedPerSecond: number
+  totalActivityPubMessagesWaiting: number
 }
 
 export interface VideosRedundancyStats {