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Implement includes caching for timelines APIs

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This commit is contained in:
Eugen Rochko 2016-11-23 08:34:35 +01:00
parent 5c78547198
commit cf912e01fd
3 changed files with 52 additions and 9 deletions
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23
app/controllers/api/v1/timelines_controller.rb
View file

@ -38,6 +38,7 @@ class Api::V1::TimelinesController < ApiController
def public
@statuses = Status.as_public_timeline(current_account).paginate_by_max_id(DEFAULT_STATUSES_LIMIT, params[:max_id], params[:since_id]).to_a
@statuses = cache(@statuses)
set_maps(@statuses)
set_counters_maps(@statuses)
@ -54,6 +55,7 @@ class Api::V1::TimelinesController < ApiController
def tag
@tag = Tag.find_by(name: params[:id].downcase)
@statuses = @tag.nil? ? [] : Status.as_tag_timeline(@tag, current_account).paginate_by_max_id(DEFAULT_STATUSES_LIMIT, params[:max_id], params[:since_id]).to_a
@statuses = cache(@statuses)
set_maps(@statuses)
set_counters_maps(@statuses)
@ -66,4 +68,25 @@ class Api::V1::TimelinesController < ApiController
render action: :index
end
private
def cache(raw)
uncached_ids = []
cached_keys_with_value = Rails.cache.read_multi(*raw.map(&:cache_key))
raw.each do |status|
uncached_ids << status.id unless cached_keys_with_value.key?(status.cache_key)
end
unless uncached_ids.empty?
uncached = Status.where(id: uncached_ids).with_includes.map { |s| [s.id, s] }.to_h
uncached.values.each do |status|
Rails.cache.write(status.cache_key, status)
end
end
raw.map { |status| cached_keys_with_value[status.cache_key] || uncached[status.id] }
end
end

25
app/models/feed.rb
View file

@ -16,7 +16,7 @@ class Feed
RegenerationWorker.perform_async(@account.id, @type)
@statuses = Status.send("as_#{@type}_timeline", @account).paginate_by_max_id(limit, nil, nil)
else
status_map = Status.where(id: unhydrated).with_includes.map { |status| [status.id, status] }.to_h
status_map = cache(unhydrated)
@statuses = unhydrated.map { |id| status_map[id] }.compact
end
@ -25,6 +25,29 @@ class Feed
private
def cache(ids)
raw = Status.where(id: ids).to_a
uncached_ids = []
cached_keys_with_value = Rails.cache.read_multi(*raw.map(&:cache_key))
raw.each do |status|
uncached_ids << status.id unless cached_keys_with_value.key?(status.cache_key)
end
unless uncached_ids.empty?
uncached = Status.where(id: uncached_ids).with_includes.map { |s| [s.id, s] }.to_h
uncached.values.each do |status|
Rails.cache.write(status.cache_key, status)
end
end
cached = cached_keys_with_value.values.map { |s| [s.id, s] }.to_h
cached.merge!(uncached) unless uncached_ids.empty?
cached
end
def key
FeedManager.instance.key(@type, @account.id)
end

13
app/models/status.rb
View file

@ -27,7 +27,7 @@ class Status < ApplicationRecord
default_scope { order('id desc') }
scope :with_counters, -> { select('statuses.*, (select count(r.id) from statuses as r where r.reblog_of_id = statuses.id) as reblogs_count, (select count(f.id) from favourites as f where f.status_id = statuses.id) as favourites_count') }
scope :with_includes, -> { includes(:account, :media_attachments, :tags, :stream_entry, mentions: :account, reblog: [:account, :stream_entry, :tags, mentions: :account], thread: :account) }
scope :with_includes, -> { includes(:account, :media_attachments, :tags, :stream_entry, mentions: :account, reblog: [:account, :stream_entry, :tags, :media_attachments, mentions: :account], thread: :account) }
def local?
uri.nil?
@ -89,28 +89,25 @@ class Status < ApplicationRecord
class << self
def as_home_timeline(account)
where(account: [account] + account.following).with_includes.with_counters
where(account: [account] + account.following).with_includes
end
def as_mentions_timeline(account)
where(id: Mention.where(account: account).pluck(:status_id)).with_includes.with_counters
where(id: Mention.where(account: account).pluck(:status_id)).with_includes
end
def as_public_timeline(account = nil)
query = joins('LEFT OUTER JOIN accounts ON statuses.account_id = accounts.id').where('accounts.silenced = FALSE')
query = filter_timeline(query, account) unless account.nil?
query.with_includes.with_counters
query
end
def as_tag_timeline(tag, account = nil)
query = tag.statuses
.joins('LEFT OUTER JOIN accounts ON statuses.account_id = accounts.id')
.where('accounts.silenced = FALSE')
query = filter_timeline(query, account) unless account.nil?
query.with_includes.with_counters
query
end
def favourites_map(status_ids, account_id)