mirror of
https://github.com/mastodon/mastodon
synced 2024-12-23 02:58:16 +09:00
0d9ffe56fb
* Add request pool to improve delivery performance Fix #7909 * Ensure connection is closed when exception interrupts execution * Remove Timeout#timeout from socket connection * Fix infinite retrial loop on HTTP::ConnectionError * Close sockets on failure, reduce idle time to 90 seconds * Add MAX_REQUEST_POOL_SIZE option to limit concurrent connections to the same server * Use a shared pool size, 512 by default, to stay below open file limit * Add some tests * Add more tests * Reduce MAX_IDLE_TIME from 90 to 30 seconds, reap every 30 seconds * Use a shared pool that returns preferred connection but re-purposes other ones when needed * Fix wrong connection being returned on subsequent calls within the same thread * Reduce mutex calls on flushes from 2 to 1 and add test for reaping
115 lines
2.4 KiB
Ruby
115 lines
2.4 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
require_relative './connection_pool/shared_connection_pool'
|
|
|
|
class RequestPool
|
|
def self.current
|
|
@current ||= RequestPool.new
|
|
end
|
|
|
|
class Reaper
|
|
attr_reader :pool, :frequency
|
|
|
|
def initialize(pool, frequency)
|
|
@pool = pool
|
|
@frequency = frequency
|
|
end
|
|
|
|
def run
|
|
return unless frequency&.positive?
|
|
|
|
Thread.new(frequency, pool) do |t, p|
|
|
loop do
|
|
sleep t
|
|
p.flush
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
MAX_IDLE_TIME = 30
|
|
WAIT_TIMEOUT = 5
|
|
MAX_POOL_SIZE = ENV.fetch('MAX_REQUEST_POOL_SIZE', 512).to_i
|
|
|
|
class Connection
|
|
attr_reader :site, :last_used_at, :created_at, :in_use, :dead, :fresh
|
|
|
|
def initialize(site)
|
|
@site = site
|
|
@http_client = http_client
|
|
@last_used_at = nil
|
|
@created_at = current_time
|
|
@dead = false
|
|
@fresh = true
|
|
end
|
|
|
|
def use
|
|
@last_used_at = current_time
|
|
@in_use = true
|
|
|
|
retries = 0
|
|
|
|
begin
|
|
yield @http_client
|
|
rescue HTTP::ConnectionError
|
|
# It's possible the connection was closed, so let's
|
|
# try re-opening it once
|
|
|
|
close
|
|
|
|
if @fresh || retries.positive?
|
|
raise
|
|
else
|
|
@http_client = http_client
|
|
retries += 1
|
|
retry
|
|
end
|
|
rescue StandardError
|
|
# If this connection raises errors of any kind, it's
|
|
# better if it gets reaped as soon as possible
|
|
|
|
close
|
|
@dead = true
|
|
raise
|
|
end
|
|
ensure
|
|
@fresh = false
|
|
@in_use = false
|
|
end
|
|
|
|
def seconds_idle
|
|
current_time - (@last_used_at || @created_at)
|
|
end
|
|
|
|
def close
|
|
@http_client.close
|
|
end
|
|
|
|
private
|
|
|
|
def http_client
|
|
Request.http_client.persistent(@site, timeout: MAX_IDLE_TIME)
|
|
end
|
|
|
|
def current_time
|
|
Process.clock_gettime(Process::CLOCK_MONOTONIC)
|
|
end
|
|
end
|
|
|
|
def initialize
|
|
@pool = ConnectionPool::SharedConnectionPool.new(size: MAX_POOL_SIZE, timeout: WAIT_TIMEOUT) { |site| Connection.new(site) }
|
|
@reaper = Reaper.new(self, 30)
|
|
@reaper.run
|
|
end
|
|
|
|
def with(site, &block)
|
|
@pool.with(site) do |connection|
|
|
ActiveSupport::Notifications.instrument('with.request_pool', miss: connection.fresh, host: connection.site) do
|
|
connection.use(&block)
|
|
end
|
|
end
|
|
end
|
|
|
|
delegate :size, :flush, to: :@pool
|
|
end
|