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Fix PostgreSQL load when linking in announcements (#13250)
* Fix PostgreSQL load when linking in announcements Fixes #13245 by caching status lookups Since statuses are supposed to be known already and we only need their URLs and a few other things, caching them should be fine. Since it's only used by announcements so far, there won't be much statuses to cache. * Perform status lookup when saving announcements, not when rendering them * Change EntityCache#status to fetch URLs instead of looking into the database * Move announcement link lookup to publishing worker * Address issues pointed out during review
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6 changed files with 32 additions and 5 deletions
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@ -7,6 +7,10 @@ class EntityCache
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MAX_EXPIRATION = 7.days.freeze
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def status(url)
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Rails.cache.fetch(to_key(:status, url), expires_in: MAX_EXPIRATION) { FetchRemoteStatusService.new.call(url) }
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end
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def mention(username, domain)
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Rails.cache.fetch(to_key(:mention, username, domain), expires_in: MAX_EXPIRATION) { Account.select(:id, :username, :domain, :url).find_remote(username, domain) }
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end
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@ -14,6 +14,7 @@
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# created_at :datetime not null
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# updated_at :datetime not null
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# published_at :datetime
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# status_ids :bigint is an Array
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#
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class Announcement < ApplicationRecord
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@ -49,7 +50,13 @@ class Announcement < ApplicationRecord
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end
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def statuses
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@statuses ||= Status.from_text(text)
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@statuses ||= begin
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if status_ids.nil?
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[]
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else
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Status.where(id: status_ids, visibility: [:public, :unlisted])
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end
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end
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end
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def tags
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@ -379,7 +379,7 @@ class Status < ApplicationRecord
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if TagManager.instance.local_url?(url)
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ActivityPub::TagManager.instance.uri_to_resource(url, Status)
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else
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Status.find_by(uri: url) || Status.find_by(url: url)
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EntityCache.instance.status(url)
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end
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end
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status&.distributable? ? status : nil
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@ -5,15 +5,24 @@ class PublishScheduledAnnouncementWorker
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include Redisable
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def perform(announcement_id)
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announcement = Announcement.find(announcement_id)
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@announcement = Announcement.find(announcement_id)
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announcement.publish! unless announcement.published?
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refresh_status_ids!
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payload = InlineRenderer.render(announcement, nil, :announcement)
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@announcement.publish! unless @announcement.published?
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payload = InlineRenderer.render(@announcement, nil, :announcement)
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payload = Oj.dump(event: :announcement, payload: payload)
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FeedManager.instance.with_active_accounts do |account|
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redis.publish("timeline:#{account.id}", payload) if redis.exists("subscribed:timeline:#{account.id}")
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end
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end
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private
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def refresh_status_ids!
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@announcement.status_ids = Status.from_text(@announcement.text).map(&:id)
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@announcement.save
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end
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end
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@ -0,0 +1,6 @@
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class AddStatusIdsToAnnouncements < ActiveRecord::Migration[5.2]
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def change
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add_column :announcements, :status_ids, :bigint, array: true
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end
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end
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@ -231,6 +231,7 @@ ActiveRecord::Schema.define(version: 2020_03_12_185443) do
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t.datetime "created_at", null: false
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t.datetime "updated_at", null: false
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t.datetime "published_at"
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t.bigint "status_ids", array: true
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end
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create_table "backups", force: :cascade do |t|
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